CN104488240B - Session management method, address management method and relevant device - Google Patents

Abstract

The invention discloses a session management method, an address management method and related devices. The session management method includes: when receiving a session request from a terminal device, according to the identification information, address information and address information of the terminal device carried in the session request. Port information, determining the type of the terminal device and/or port; sending a session management request to the server according to the type of the terminal device and/or port; receiving a session management response message sent by the server, and according to the session management In response to the session management policy included in the message, session management is performed on the terminal device. The invention also discloses an address management method and a corresponding device. According to the type of the terminal device and/or port, the server can be requested to set and issue a corresponding session management policy for the terminal device, and session management is performed according to the session management policy, which improves the session management process.

Description

A session management method, an address management method, and related devices

technical field

The invention relates to the field of communication technology, in particular to a session management method, an address management method and related devices.

Background technique

In the subject of fixed network and mobile network convergence, the premise is to use the Policy and Charging Control (PCC) framework in the 3rd Generation Partnership Project (3GPP) system to realize the control of fixed network resources. control. That is, the policy and charging rules function (Policy and Charging Rules Function, PCRF) as a policy control entity, fixed network data gateways such as broadband network gateways (Broadband Network Gateway, BNG) as a fixed network Control of different data flows.

A fixed user connection is established between the Residential Gateway (RG) and the BNG for each Internet Protocol (Internet Protocol, IP) address, and at the same time, an IP connection is established between the BNG and the PCRF for each IP address to access the network (IP- Connectivity Access Network, IP-CAN) session, IP-CAN session and fixed user connection correspond to each other according to IP address.

In actual deployment, RG may work in Routed mode with Network Address Translation. In this scenario, RG assigns a local IP address to each terminal device connected to it, but the connection All terminals to the same RG share a wide area network (Wide Area Network, WAN) IP address. At this time, there is only one fixed user connection between an RG and the BNG. When the RG is in the routing mode with address translation, when the RG accesses, the PCRF establishes an IP-CAN session for the RG. After that, when each terminal device accesses from the RG, it will not trigger a new IP-CAN session. During the establishment process, PCRF cannot formulate policies based on the subscription of terminal equipment accessed from the RG, but formulates policies based on the subscription of the RG, and different service flows use the same IP address after Network Address Port Translation (NAPT). For IP address and port number, PCRF cannot formulate different policies for different service flows.

To sum up, how to better perform session management has become an urgent problem to be solved in the industry.

Contents of the invention

In view of this, the embodiments of the present invention provide a session management method, an address management method and related devices, which are used to solve the problem that session management cannot be performed well in the prior art.

In the first aspect, a session management method is provided, including:

When receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information, and port information of the terminal device carried in the session request;

Sending a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device;

receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message.

In a first possible implementation manner, the receiving the session request of the terminal device includes:

A five-tuple packet is detected; or,

An address matching request from a terminal device is received.

With reference to the first possible implementation of the first aspect, in a second possible implementation, when a 5-tuple data packet is detected, according to the identification information of the terminal device carried in the session request, Address information and port information to determine the type of the terminal device and/or port, including:

Querying the PCP server for second address information and second port information corresponding to the first address information and first port information of the terminal device, and identification information of the terminal device;

Determine the type of the terminal device and/or port according to the query result.

With reference to the first possible implementation of the first aspect, in a third possible implementation, after receiving the address matching request of the terminal device, and the Identification information, address information and port information, before determining the type of the terminal device and/or port, the method further includes:

If the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request, modify the source address of the address matching request to the value in the PCP client address field , and send the address matching request to the PCP server.

With reference to the first possible implementation manner or the third possible implementation manner of the first aspect, in a fourth possible implementation manner, when receiving the address matching request of the terminal device, according to the The identification information, address information and port information of the terminal equipment determine the type of the terminal equipment and/or port, including:

Querying the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device, and the identification information of the terminal device;

Determine the type of the terminal device and/or port according to the query result.

With reference to the fourth possible implementation of the first aspect, in a fifth possible implementation, the querying the PCP server for the second address information of the terminal device and the first address information corresponding to the second port information and first port information, including:

sending a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and judges that the terminal device identification information corresponding to the record is the same as the terminal device's Whether the identification information is consistent;

If the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information, receiving an address conflict error response message returned by the PCP server, and sending the address conflict error response message to the terminal device;

If the record does not include the identification information of the terminal device, receiving the first address information and the first port information corresponding to the second address information and the second port information sent by the PCP server, and the terminal device's Identification information.

With reference to the second possible implementation manner or the fourth possible implementation manner of the first aspect, in a sixth possible implementation manner, the determining the type of the terminal device and/or port according to the query result includes:

Judging whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache;

If the judgment result is no, then determining that the terminal device is a first type of terminal device;

If the judgment result is yes, further judge whether there is a record corresponding to the second port information in the query result in the local cache;

If the further judgment result is no, it is determined that the terminal device is a second type of terminal device and that the port is a first type of port.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the sending the session management request to the server according to the type of the terminal device and/or port includes:

If it is determined that the terminal device is a first type of terminal device, sending a session establishment request to the server, where the session establishment request includes identification information and port information of the terminal device;

If the terminal device is a terminal device of the second type and the port is a port of the first type, a session modification request is sent to the server, where the session modification request includes identification information and port information of the terminal device.

With reference to the sixth possible implementation manner of the first aspect, in an eighth possible implementation manner, the sending the session management request to the server according to the type of the terminal device and/or port includes:

If it is determined that the terminal device is a terminal device of the first type, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, a session modification request is sent to the server, wherein the session modification request includes the Identification information and port information of the terminal device.

In combination with the fifth possible implementation of the first aspect or the sixth possible implementation of the first aspect or the seventh possible implementation of the first aspect or the eighth possible implementation of the first aspect, in In a ninth possible implementation manner, the method further includes:

receiving a session request from the terminal device, where the session request includes identification information of the terminal device and port information to be released;

Sending a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list;

Sending a session management request to the server, and receiving a response message returned by the server for performing session management on the port to be released;

Release the resource occupied by the port to be released.

With reference to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, the sending the session management request to the server includes:

If the received session request sent by the terminal device indicates that all ports will be released, then send a session termination request to the server;

Otherwise, send a session modification request to the server, where the session modification request includes the identification information of the terminal device, the port number to be released, and a deletion flag.

In the second aspect, an address management method is provided, including:

receiving a query message from the session management device, where the query address list includes records of the second address information, the second port information, and the identification information of the terminal equipment carried in the query message;

If the identification information of the terminal equipment corresponding to the record is inconsistent with the identification information of the terminal equipment, return an address conflict error response message to the session management device, so that the session management device responds with the address conflict error The message is sent to the terminal device;

If the record does not include the identification information of the terminal device, adding the identification information of the terminal device to the record in the address list, and returning the record to the session management apparatus.

In a third aspect, a session management method is provided, including:

receiving a session management request sent by the session management device, where the session management request includes identification information and port information of the terminal device;

Generate a session management policy according to the terminal device identification information and port information, and send a session management response message containing the session management policy to the session management apparatus.

In a first possible implementation manner, the session management policy includes a quality of service and/or charging policy.

In a fourth aspect, a session management device is provided, including:

The first determining unit is configured to, when receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information, and port information of the terminal device carried in the session request;

A first sending unit, configured to send a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device;

a first receiving unit, configured to receive a session management response message sent by the server;

The first management unit is configured to perform session management on the terminal device according to the session management policy included in the session management response message.

In a first possible implementation manner, the receiving the session request of the terminal device includes:

A five-tuple packet is detected; or,

An address matching request from a terminal device is received.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the first determining unit includes:

The first query unit is configured to query the PCP server for the second address information and the second port information corresponding to the first address information and the first port information of the terminal device when a quintuple data packet is detected, and the The identification information of the terminal device;

The second determining unit is configured to determine the type of the terminal device and/or port according to the query result.

With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner, the device further includes:

A modifying unit, configured to modify the source address of the address matching request to the PCP client address if the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request the value in the field;

The second sending unit is configured to send the address matching request to the PCP server.

With reference to the first possible implementation manner or the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the first determining unit includes:

The second query unit is configured to, when receiving the address matching request of the terminal device, query the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device, and the The identification information of the terminal device;

The second determining unit is configured to determine the type of the terminal device and/or port according to the query result.

With reference to the fourth possible implementation of the fourth aspect, in a fifth possible implementation, the second query unit includes:

A third sending unit, configured to send a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and determines the terminal device identifier corresponding to the record Whether the information is consistent with the identification information of the terminal device;

The second receiving unit is configured to receive an address conflict error response message returned by the PCP server if the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information;

a fourth sending unit, configured to send the address conflict error response message to the terminal device;

A third receiving unit, configured to receive first address information and first port information corresponding to the second address information and second port information sent by the PCP server if the record does not include the identification information of the terminal device , and the identification information of the terminal device.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the second determining unit includes:

A first judging unit, configured to judge whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache;

A third determining unit, configured to determine that the terminal device is a terminal device of the first type if the judgment result is no;

The second judging unit is configured to further judge whether there is a record corresponding to the second port information in the query result in the local buffer if the judging result of the first judging unit is yes;

The fourth determination unit is configured to determine that the terminal device is a second type of terminal device and that the port is a first type of port if the determination result of the second determination unit is negative.

With reference to the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner, the first sending unit includes:

A fifth sending unit, configured to send a session establishment request to a server if it is determined that the terminal device is a first type of terminal device, where the session establishment request includes identification information and port information of the terminal device;

A sixth sending unit, configured to send a session modification request to the server if the terminal device is a second type of terminal device and the port is a first type port, wherein the session modification request includes the terminal device ID information and port information.

With reference to the sixth possible implementation manner of the fourth aspect, in an eighth possible implementation manner, the first sending unit further includes:

A seventh sending unit, configured to send a session modification request to the server if it is determined that the terminal device is a first type of terminal device and the terminal device is determined to be a fixed terminal device according to the identification information of the terminal device, wherein the The session modification request includes identification information and port information of the terminal device.

In combination with the fifth possible implementation of the fourth aspect or the sixth possible implementation of the fourth aspect or the seventh possible implementation of the fourth aspect or the eighth possible implementation of the fourth aspect, in In a ninth possible implementation manner, the device further includes:

A fourth receiving unit, configured to receive a session request from the terminal device, where the session request includes identification information of the terminal device and port information to be released;

An eighth sending unit, configured to send a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list;

a ninth sending unit, configured to send a session management request to the server;

A fifth receiving unit, configured to receive a response message returned by the server for performing session management on the port to be released;

A release unit, configured to release the resource occupied by the port to be released.

With reference to the ninth possible implementation manner of the fourth aspect, in a tenth possible implementation manner, the ninth sending unit includes:

A tenth sending unit, configured to send a session termination request to the server if the received session request sent by the terminal device indicates that all ports will be released;

The eleventh sending unit is configured to send a session modification request to the server if the received session request sent by the terminal device indicates that some ports will be released, and the session modification request includes the terminal device's Identification information, the port number to be released, and the deletion flag.

In the fifth aspect, an address management server is provided, including:

The sixth receiving unit is configured to receive a query message from the session management device, and the query address list includes records of the second address information, the second port information, and the identification information of the terminal equipment carried in the query message;

A first returning unit, configured to return an address conflict error response message to the session management apparatus if the identification information of the terminal equipment corresponding to the record is inconsistent with the identification information of the terminal equipment, so that the session management apparatus sending the address conflict error response message to the terminal device;

an adding unit, configured to add the identification information of the terminal device to the record of the address list if the record does not include the identification information of the terminal device;

a second returning unit, configured to return the record to the session management device.

In the sixth aspect, a server is provided, including:

A seventh receiving unit, configured to receive a session management request sent by the session management device, where the session management request includes identification information and port information of the terminal device;

A generating unit, configured to generate a session management policy according to the terminal device identification information and port information;

A twelfth sending unit, configured to send a session management response message including the session management policy to the session management apparatus.

In a first possible implementation manner, the session management policy includes a quality of service and/or charging policy.

A seventh aspect provides a session management device, which is characterized by comprising: an input device, an output device, a memory, and a processor, wherein a set of program codes is stored in the memory, and the processor is used to call the Program code stored in memory to perform the following operations:

When receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information, and port information of the terminal device carried in the session request;

Sending a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device;

receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message.

In a first possible implementation manner, the receiving the session request of the terminal device includes:

A five-tuple packet is detected; or,

An address matching request from a terminal device is received.

With reference to the first possible implementation manner of the seventh aspect, in a second possible implementation manner, when the processor detects a 5-tuple data packet, according to the terminal carried in the session request, The identification information, address information and port information of the device, and the step of determining the type of the terminal device and/or port include:

Querying the PCP server for second address information and second port information corresponding to the first address information and first port information of the terminal device, and identification information of the terminal device;

Determine the type of the terminal device and/or port according to the query result.

With reference to the first possible implementation manner of the seventh aspect, in a third possible implementation manner, after the processor executes the step of receiving the address matching request of the terminal device, and the processor executes the Before the step of determining the type of the terminal device and/or port according to the identification information, address information and port information of the terminal device carried in the session request, the following steps are further performed:

If the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request, modify the source address of the address matching request to the value in the PCP client address field , and send the address matching request to the PCP server.

With reference to the first possible implementation manner or the third possible implementation manner of the seventh aspect, in a fourth possible implementation manner, when the processor executes the address matching request received from the terminal device, according to the The identification information, address information and port information of the terminal device carried in the session request, and the step of determining the type of the terminal device and/or port include:

Querying the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device, and the identification information of the terminal device;

Determine the type of the terminal device and/or port according to the query result.

With reference to the fourth possible implementation manner of the seventh aspect, in a fifth possible implementation manner, the processor performs the querying the PCP server for information corresponding to the second address information and the second port information of the terminal device. The steps of the first address information and the first port information include:

sending a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and judges that the terminal device identification information corresponding to the record is the same as the terminal device's Whether the identification information is consistent;

If the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information, receiving an address conflict error response message returned by the PCP server, and sending the address conflict error response message to the terminal device;

If the record does not include the identification information of the terminal device, receiving the first address information and the first port information corresponding to the second address information and the second port information sent by the PCP server, and the terminal device's Identification information.

With reference to the second possible implementation manner or the fourth possible implementation manner of the seventh aspect, in a sixth possible implementation manner, the processor performs the determining the terminal device and/or port according to the query result. types of steps, including:

Judging whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache;

If the judgment result is no, then determining that the terminal device is a first type of terminal device;

If the judgment result is yes, further judge whether there is a record corresponding to the second port information in the query result in the local cache;

If the further judgment result is no, it is determined that the terminal device is a second type of terminal device and that the port is a first type of port.

With reference to the sixth possible implementation manner of the seventh aspect, in a seventh possible implementation manner, the processor performs the step of sending a session management request to a server according to the type of the terminal device and/or port, include:

If it is determined that the terminal device is a first type of terminal device, sending a session establishment request to the server, where the session establishment request includes identification information and port information of the terminal device;

If the terminal device is a terminal device of the second type and the port is a port of the first type, a session modification request is sent to the server, where the session modification request includes identification information and port information of the terminal device.

With reference to the sixth possible implementation manner of the seventh aspect, in an eighth possible implementation manner, the processor performs the step of sending a session management request to a server according to the type of the terminal device and/or port, include:

If it is determined that the terminal device is a terminal device of the first type, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, a session modification request is sent to the server, wherein the session modification request includes the Identification information and port information of the terminal device.

In combination with the fifth possible implementation of the seventh aspect or the sixth possible implementation of the seventh aspect or the seventh possible implementation of the seventh aspect or the eighth possible implementation of the seventh aspect, in In a ninth possible implementation manner, the processor further performs the following steps:

receiving a session request from the terminal device, where the session request includes identification information of the terminal device and port information to be released;

Sending a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list;

Sending a session management request to the server, and receiving a response message returned by the server for performing session management on the port to be released;

Release the resource occupied by the port to be released.

With reference to the ninth possible implementation manner of the seventh aspect, in a tenth possible implementation manner, the processor performing the step of sending the session management request to the server includes:

If the received session request sent by the terminal device indicates that all ports will be released, then send a session termination request to the server;

Otherwise, send a session modification request to the server, where the session modification request includes the identification information of the terminal device, the port number to be released, and a deletion flag.

In an eighth aspect, a session management server is provided, which is characterized by comprising: an input device, an output device, a memory, and a processor, wherein a set of program codes are stored in the memory, and the processor is used to call the Program code stored in memory to perform the following operations:

receiving a query message from the session management device, where the query address list includes records of the second address information, the second port information, and the identification information of the terminal equipment carried in the query message;

If the identification information of the terminal equipment corresponding to the record is inconsistent with the identification information of the terminal equipment, return an address conflict error response message to the session management device, so that the session management device responds with the address conflict error The message is sent to the terminal device;

If the record does not include the identification information of the terminal device, adding the identification information of the terminal device to the record in the address list, and returning the record to the session management apparatus.

A ninth aspect provides a server, which is characterized by including an input device, an output device, a memory, and a processor, wherein a set of program codes is stored in the memory, and the processor is used to call the program code stored in the memory. program code to do the following:

receiving a session management request sent by the session management device, where the session management request includes identification information and port information of the terminal device;

Generate a session management policy according to the terminal device identification information and port information, and send a session management response message containing the session management policy to the session management apparatus.

In a first possible implementation manner, the session management policy includes a quality of service and/or charging policy.

Using the technical solution of a session management method, address management method and related devices provided by the present invention, the server can be requested to set and issue a corresponding session management policy for the terminal device according to the type of the terminal device and/or port, and according to the session The management strategy implements session management, which improves the session management process.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a method flowchart of an embodiment of a session management method of the present invention;

Fig. 2 is a method flowchart of another embodiment of a session management method of the present invention;

Fig. 3 is a method flowchart of another embodiment of a session management method of the present invention;

Fig. 4 is a method flowchart of an embodiment of an address management method of the present invention;

Fig. 5 is a method flowchart of another embodiment of a session management method of the present invention;

FIG. 6 is a schematic structural diagram of an embodiment of a session management device according to the present invention;

FIG. 7 is a schematic structural diagram of another embodiment of a session management device according to the present invention;

FIG. 8 is a schematic structural diagram of another embodiment of a session management device according to the present invention;

FIG. 9 is a schematic structural diagram of an embodiment of an address management server according to the present invention;

FIG. 10 is a schematic structural diagram of an embodiment of a server in the present invention;

FIG. 11 is a schematic structural diagram of an embodiment of a session management device provided by the present invention;

FIG. 12 is a schematic structural diagram of an embodiment of a session management server provided by the present invention;

Fig. 13 is a schematic structural diagram of an embodiment of a server provided by the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 1 is a method flowchart of an embodiment of a session management method of the present invention. As shown in Figure 1, the method includes the following steps:

Step S101, when receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information and port information of the terminal device carried in the session request.

In this embodiment, session requests of terminal devices are managed uniformly. The reception of the session request of the terminal device may be the detection of a 5-tuple data packet, or the receipt of an address matching request of the terminal device. The session request carries address information and port information of the terminal device, and may also carry identification information of the terminal device.

The identification information of the terminal device can uniquely identify the terminal device; the address information of the terminal device includes the address before NAPT or the address after NAPT, that is, the local IP address or WAN IP address. The terminal device has a unique local IP address. The terminal devices share a WAN IP address; the port information of the terminal devices includes port information before NAPT or port information after NAPT.

The session request sent from the terminal device may be initiated by a newly connected terminal device, or it may be initiated by a new port of a connected terminal device. According to the identification information, address information and port information of the terminal device, it can be determined The type of the terminal device is a newly connected terminal device, or it is determined that the type of the terminal device is an already connected terminal device and the type of the port is a new port.

Step S102, according to the type of the terminal device and/or port, send a session management request to the server, where the session management request includes the identification information and port information of the terminal device.

For a terminal device and/or port whose type is a newly accessed terminal device or a new port of a connected terminal device, the server is requested to set a session management policy for the terminal device. Therefore, according to the type of the terminal device and/or port, the The server sends a session management request, where the session management request carries identification information and port information of the terminal device.

Step S103, receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message.

Receive the session management response message sent by the server. The session management response message is the server's response to the session management request. Specifically, set a corresponding session management policy for the terminal device corresponding to the identification information of the terminal device. The session management policy is included in In the session management response message, session management is performed on the terminal device according to the session management policy.

According to a session management method provided by an embodiment of the present invention, the server can be requested to set and issue a corresponding session management strategy for the terminal device according to the type of the terminal device and/or port, and session management is performed according to the session management strategy, which improves the Session management process.

Fig. 2 is a method flowchart of another embodiment of a session management method of the present invention. As shown in Figure 2, the method includes the following steps:

Step S201, when a quintuple data packet is detected, query the PCP server for the second address information and the second port information corresponding to the first address information and the first port information of the terminal device, as well as the identification information of the terminal device .

A five-tuple data packet is detected, and the five-tuple refers to a set composed of source IP address, source port, destination IP address, destination port, and transport layer protocol number. For example, session management by a fixed network edge data gateway (IP Edge), which detects a new quintuple.

The port control protocol (Port Control Protocol, PCP) server uniformly manages the identification information, address information and port information of the connected terminal equipment, and according to the identification information of the terminal equipment, correspondingly stores the first/second The mapping relationship between address information and first/second port information. When the identification information of the terminal device is empty, it means that the terminal device is a newly accessed terminal device, and no PCP MAP message has been sent to register the identification information of the terminal device. Wherein, the first address information and the first port information respectively correspond to the address information and port information after NAPT, namely IPWAN address information and WAN port information; the second address information and the second port information respectively correspond to the address information and port information before NAPT , that is, local IP address information and local area network (Local Area Network, LAN) source port information.

According to the mapping relationship between the first/second address information and the first/second port information stored in the PCP server, the address and port information after NAPT can be used to query the corresponding address and port information before NAPT, as well as the terminal device's Identification information.

For example, IP Edge sends a "PCP Query" request message to the PCP server, which carries the IP WAN address and WAN source port in the five-tuple packet, and the PCP server queries the WAN IP address and WAN source port carried in the session request The corresponding record in the address list returns a "PCP Query" response message to IP Edge, and the queried record includes terminal device identification information, WAN IP address, local IP address, WAN source port and LAN source port.

Step S202, judging whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache, if not, go to step S203; otherwise, go to step S204.

Step S203, determining that the terminal device is a first type of terminal device.

Step S204, judging whether there is a record corresponding to the second port information in the query result in the local cache, if yes, go to step S205; otherwise, go to step S206.

Step S205, end.

Step S206, determining that the terminal device is a second type of terminal device and that the port is a first type of port.

Step S207, sending a session establishment request to the server, wherein the session establishment request includes the identification information and port information of the terminal device.

Step S208, sending a session modification request to the server, wherein the session modification request includes the identification information and port information of the terminal device.

Step S209, receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message.

Before IP Edge processed a service request, it stored the identification information, address information, and port information of the terminal device in its cache area, but for new service requests, it did not store its corresponding record. Therefore, according to the identification information of the terminal device , judging whether there is a record corresponding to the identification information of the terminal device in the PCP server query result in the cache area, if the result of the judgment is no, then determining that the terminal device is the first type of terminal device, the first type of terminal device be a newly accessed terminal device; if the result of the judgment is yes, then determine that the terminal device is a second type of terminal device, and further judge whether there is a record corresponding to the LAN source port information in the PCP server query result in the cache area, If the result of the judgment is no, then determine that the port of the terminal device is a port of the first type, that is, the terminal device of the second type is an accessed terminal device that initiates a session request through a new port; if the result of the judgment is yes, is not processed.

If it is determined that the terminal device is a newly connected terminal device, a session establishment request is sent to the server, and the session establishment request carries the identification information and port information of the terminal device, so that the server is directed to the terminal device and its port information corresponding to the identification information of the terminal device Set the session management policy for the corresponding port; if it is determined that the terminal device is a connected terminal device and the port that sends the session request is a new port, then a session modification request is sent to the server, and the session modification request carries the identification information and port information of the terminal device , so that the server modifies the session management policy of the terminal device, and sets a corresponding session management policy for the newly added port. For example, the server is PCRF, and the PCRF formulates or updates policies according to the identification information and port information of the terminal equipment, the session management policy includes Quality of Service (QoS) and/or charging information, and sends a session management response message to IP Edge , which contains the session management policy. After receiving the session management response message, the IP Edge parses the session management policy therein, and executes the session management policy for the terminal device.

As a possible implementation manner, if it is determined that the terminal device is the first type of terminal device, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, then a session modification request is sent to the server.

In step S210, a session request of the terminal device is received, and the session request includes identification information of the terminal device and port information to be released.

Step S211, sending a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list.

Step S212, sending a session management request to the server, and receiving a session management response message returned by the server.

Step S213, releasing the resource occupied by the port to be released.

Steps S210 to S213 are the session management process caused by the terminal device releasing the port.

In one case, the end device releases one or more ports. In the scenario where a terminal device corresponds to an independent IP-CAN session, this scenario includes the case where the terminal device releases one or more ports but not all ports; in the scenario where a fixed terminal does not correspond to an independent IP-CAN session In this case, this scenario includes the situation where the end device releases one or more or all ports. Receive the session request sent by the terminal device, the request message carries the identification information of the terminal device and the port information to be released, and send to the PCP server to delete the address list corresponding to the identification information of the terminal device and the port information to be released After receiving the request message, the PCP server deletes the record corresponding to the identification information of the terminal device and the port information to be released in the address list. Then, IP Edge sends a session management request to the server. If the terminal device One or more ports are released, and the session management request is a session modification request, which includes the identification information of the terminal device and the port number to be released, and receives the session management policy update returned by the server according to the port to be released Finally, according to the response message, the session management device releases the resource occupied by the port to be released, and deletes the record corresponding to the identification information of the terminal device and the port information to be released in the cache area. The session management request is a session modification request, and the session modification request includes identification information of the terminal device, a port number to be released, and a deletion flag.

In another case, the end device releases all ports. The session management process caused by the terminal device releasing all ports is different from the session management process caused by the terminal device releasing one or more ports in that the session management request sent to the server is a session termination request, requesting the server to terminate the terminal device IP-CAN session.

According to a session management method provided by an embodiment of the present invention, the terminal device and/or port type is determined according to the identification information, address information and port information of the terminal device carried in the five-tuple data packet, and according to the terminal device and/or or port type, request the server to generate a corresponding session management policy according to the terminal device identification information and port information, and perform session management on the terminal device according to the session management policy, which improves the session management process.

Fig. 3 is a method flowchart of another embodiment of a session management method according to the present invention. As shown in Figure 3, the method includes the following steps:

Step S301, receiving an address matching request from a terminal device.

Step S302, judging whether the source address of the address matching request is consistent with the value in the PCP client address field in the address matching request, if yes, go to step S304; otherwise, go to step S303.

Step S303, modifying the source address of the address matching request to the value in the address field of the PCP client, and sending the address matching request to the PCP server.

Step S304, sending a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and determines that the terminal device identification information corresponding to the record is the same as the Whether the identification information of the terminal equipment is consistent.

Step S305, if the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information, receive the address conflict error response message returned by the PCP server, and send the address conflict error response message to the terminal equipment.

Step S306, if the record does not include the identification information of the terminal device, receiving the first address information and the first port information corresponding to the second address information and the second port information sent by the PCP server, and the terminal identification information information.

Step S301 to step S306 are the process of performing address matching on the terminal device. The address matching request of the terminal device is received, and the address matching request is sent to the PCP server for address matching.

In this embodiment, the IP Edge performs session management on the terminal equipment as an example, wherein the PCP server can be set up together with the IP Edge, or can be set up separately.

The RG allocates local IP addresses for the connected 3GPP mobile terminals or fixed terminals. When the RG is in the routing mode with address translation, usually the same fixed network data gateway will be connected to multiple RGs. If these RGs are all working with address translation In the routing mode, terminal devices connected to different RGs may be assigned the same local IP address. In this case of address conflict, the fixed network data gateway cannot distinguish terminals connected to different RGs only by local IP addresses and port numbers. The device, therefore, needs to be assigned a local IP address by the PCP server for address matching to ensure that it does not conflict with the local IP address of other end devices.

The IP Edge sends a "PCP MAP" request message to the PCP server, which carries identification information of the terminal device, including one or more of the terminal identification and the terminal equipment identification. The request message passes through the RG and is forwarded by the RG. The RG can add the RG identifier, and the address information and port information of the terminal device. Wherein, the terminal device can have multiple ports, and the port information includes the identification information of multiple ports. If other universal plug and play (Universal Plug and Play, UPnP) protocols are used between the terminal device and the RG, the interaction message between the UE and the RG will be replaced by the interaction message of the corresponding UPnP protocol.

When any terminal device accesses, the PCP server receives and stores the address information and port information of the terminal device before and after NAPT sent by the corresponding RG, and forms a NAPT mapping table, which stores the first/second address information of the terminal device, The mapping relationship of the first/second port information. When the identification information of the terminal device is empty, it means that the terminal device is a newly accessed terminal device, and no PCP MAP message has been sent to register the identification information of the terminal device. Wherein, the first address information and the first port information respectively correspond to the address information and port information after NAPT, that is, IP WAN address information and WAN port information; the second address information and the second port information respectively correspond to the address information and port information before NAPT Information, that is, local IP address information and local area network (Local Area Network, LAN) source port information.

After receiving the "PCP MAP" request message, the PCP server queries the NAPT mapping table stored by itself, finds the record containing the local IP address in the request message and the port information before NAPT, and judges the identification information corresponding to the record and the request message If the identification information of the terminal device in the record is inconsistent, it will receive the address conflict error response message sent by the PCP server and forward it to the terminal device; if the record does not contain the identification information of the terminal device, the PCP server will fill in the identification information of the terminal device here records. After the address matching is successful, the second address information and the second port information corresponding to the first address information and the first port information sent by the PCP server, and the identification information of the determined terminal device are received.

In addition, before sending the query message to the PCP server, if the source IP address (source IP Address) of the "PCP MAP" request message is inconsistent with the value in the PCP Client's IP Address field in the request message, The PCP server does not return an address conflict error message, but knows that the request message has passed through NAT through the inconsistency of the two addresses, queries according to the value of the parameter PCP Client's IP Address field in the message, and sends the address matching request to the PCP server.

Through this address matching process, conflicts between local IP addresses and local ports between terminal devices can be avoided.

Step S307, judging whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache, if yes, go to step S308; otherwise, go to step S309.

Step S308, determining that the terminal device is a first type of terminal device.

Step S309, judging whether there is a record corresponding to the second port information in the query result in the local cache, if yes, go to step S310, and end; otherwise, go to step S311.

Step S310, end.

Step S311, determining that the terminal device is a second type of terminal device and that the port is a first type of port.

Step S312, sending a session establishment request to the server, wherein the session establishment request includes the terminal device identification information and port information.

Step S313, sending a session modification request to the server, wherein the session modification request includes the terminal device identification information and port information.

Step S314, receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message.

After the IP Edge receives the first address information and first port information corresponding to the second address information and the second port information sent by the PCP server, and the identification information of the terminal device, the received address information and port information will be compared with the IP Edge local The address information in the cache area is compared with the port information to determine the type of terminal device and/or port, so as to send a session management request to the server according to the determined type of terminal device and/or port, receive the session management policy sent by the server, and The terminal device performs session management, and the process of performing session management from step S307 to step S314 is the same as or similar to step S202 to step S209 in the foregoing embodiment, and will not be repeated here.

According to a session management method provided by an embodiment of the present invention, in the address matching process, the terminal device and/or port type is determined according to the acquired identification information, address information and port information of the terminal device after the address matching is successful, according to The type of the terminal device and/or port requests the server to generate a corresponding session management strategy according to the terminal device identification information and port information, and performs session management on the terminal device according to the session management strategy, which improves the session management process; at the same time, performs address matching , to avoid address conflicts.

Fig. 4 is a method flowchart of an embodiment of an address management method according to the present invention. As shown in Figure 4, the method includes the following steps:

Step S401, receiving a query message from the session management device, and the query address list includes records of the second address information, the second port information and the identification information of the terminal equipment carried in the query message.

Step S402, if the identification information of the terminal equipment corresponding to the record is inconsistent with the identification information of the terminal equipment, return an address conflict error response message to the session management device, so that the session management device will use the address A conflict error response message is sent to the end device.

Step S403, if the record does not include the identification information of the terminal device, add the identification information of the terminal device to the record in the address list, and return the record to the session management apparatus.

Steps S401 to S403 are the process of address management by the PCP server.

The session management device sends a "PCP MAP" request message to the PCP server, which carries identification information of the terminal equipment, including one or more of the terminal identification and the terminal equipment identification. The request message passes through the RG and is forwarded by the RG. The RG can add the RG identifier, and the address information and port information of the terminal device. Wherein, the terminal device can have multiple ports, and the port information includes the identification information of multiple ports. If other universal plug and play (Universal Plug and Play, UPnP) protocols are used between the terminal device and the RG, the interaction message between the UE and the RG will be replaced by the interaction message of the corresponding UPnP protocol.

When any terminal device accesses, the PCP server receives and stores the address information and port information of the terminal device before and after NAPT sent by the corresponding RG, and forms a NAPT mapping table, which stores the first/second address information of the terminal device, The mapping relationship of the first/second port information. When the identification information of the terminal device is empty, it means that the terminal device is a newly accessed terminal device, and no PCP MAP message has been sent to register the identification information of the terminal device. Wherein, the first address information and the first port information correspond to the address information and port information after NAPT respectively, that is, IP WAN address information and WAN port information; the second address information and the second port information correspond to the address information and port information before NAPT respectively. Information, that is, local IP address information and local area network (Local Area Network, LAN) source port information.

After receiving the "PCP MAP" request message, the PCP server queries the NAPT mapping table stored by itself, finds the record containing the local IP address in the request message and the port information before NAPT, and judges the identification information corresponding to the record and the request message If the identification information of the terminal device in the record is inconsistent, it will receive the address conflict error response message sent by the PCP server and forward it to the terminal device; if the record does not contain the identification information of the terminal device, the PCP server will fill in the identification information of the terminal device here records. After the address matching is successful, the second address information and the second port information corresponding to the first address information and the first port information sent by the PCP server, and the identification information of the determined terminal device are received.

According to an address management method provided by an embodiment of the present invention, through the address matching process, conflicts between local IP addresses and local ports between terminal devices can be avoided.

Fig. 5 is a method flowchart of another embodiment of a session management method according to the present invention. As shown in Figure 5, the method includes the following steps:

Step S501, receiving a session management request sent by a session management device, where the session management request includes identification information and port information of a terminal device.

Step S502: Generate a session management policy according to the terminal device identification information and port information, and send a session management response message including the session management policy to the session management apparatus.

In this embodiment, the server receives the session management request sent by the session management device, where the session management request includes identification information of the terminal device, and may also include port information. Wherein, the identification information of the terminal device can uniquely identify the terminal device; one terminal device may have multiple ports, and the port information may include the identification information of the multiple ports.

The terminal device corresponding to the session management request may be any terminal device, possibly a new terminal device, or the terminal device corresponding to the session management request may be a connected terminal device, but its port may be a new port, and the server needs to A session management policy is generated according to the identification information of the terminal device, which may also include port information. The session management policy is sent to the session management device, so that the session management device manages the session request according to the session management policy.

The session management request includes a session establishment request and a session modification request. Corresponding to a new terminal device, the session management device sends a session establishment request to the server, and the server sets a new session management strategy for the new terminal device according to the identification information and port information of the terminal device, and uses the session management response message to set the session management strategy sent to the session management device. Corresponding to the new port of the connected terminal device, the session management device sends a session modification request to the server, and the server queries the corresponding session management strategy of the terminal device according to the identification information of the terminal device, modifies the session management strategy, and expands the session management strategy in it. The session management policy corresponding to the new port is sent to the session management device through a session management response message. Wherein, the server may be PCRF. The session management policy includes quality of service, and may also include a charging policy.

When receiving the session management request from the session management device, if the session management request is a session modification request indicating deletion of the corresponding ports, or the session management request is a session termination request, the PCRF deletes the corresponding resources of these ports and adjusts the session management strategy.

According to a session management method provided by an embodiment of the present invention, the server receives a request sent by the session management device to set a session management policy for a new terminal device or a new port of a connected terminal device, and sets the session management policy for the terminal device , so that the session management apparatus that receives the session management policy can perform session management on the terminal device according to the session management policy, which improves the session management process.

Fig. 6 is a schematic structural diagram of an embodiment of a session management device according to the present invention. As shown in Figure 6, the device 1000 includes:

The first determining unit 101 is configured to, when receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information and port information of the terminal device carried in the session request.

In this embodiment, session requests of terminal devices are managed uniformly. The reception of the session request of the terminal device may be the detection of a 5-tuple data packet, or the receipt of an address matching request of the terminal device. The session request carries address information and port information of the terminal device, and may also carry identification information of the terminal device.

The identification information of the terminal device can uniquely identify the terminal device; the address information of the terminal device includes the address before NAPT or the address after NAPT, that is, the local IP address or WAN IP address. The terminal device has a unique local IP address. The terminal devices share a WAN IP address; the port information of the terminal devices includes port information before NAPT or port information after NAPT.

The session request sent from the terminal device may be initiated by a newly connected terminal device, or it may be initiated by a new port of a connected terminal device. According to the identification information, address information and port information of the terminal device, it can be determined The type of the terminal device is a newly connected terminal device, or it is determined that the type of the terminal device is an already connected terminal device and the type of the port is a new port.

The first sending unit 102 is configured to send a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device.

For a terminal device and/or port whose type is a newly accessed terminal device or a new port of a connected terminal device, the server is requested to set a session management policy for the terminal device. Therefore, according to the type of the terminal device and/or port, the The server sends a session management request, where the session management request carries identification information and port information of the terminal device.

The first receiving unit 103 is configured to receive the session management response message sent by the server.

The first management unit 104 is configured to perform session management on the terminal device according to the session management policy included in the session management response message.

Receive the session management response message sent by the server. The session management response message is the server's response to the session management request. Specifically, set a corresponding session management policy for the terminal device corresponding to the identification information of the terminal device. The session management policy is included in In the session management response message, session management is performed on the terminal device according to the session management policy.

According to a session management device provided by an embodiment of the present invention, the server can be requested to set and issue a corresponding session management strategy for the terminal device according to the type of the terminal device and/or port, and perform session management according to the session management strategy, which improves the Session management process.

Fig. 7 is a schematic structural diagram of another embodiment of a session management device according to the present invention. As shown in Figure 7, the device 2000 includes:

The first query unit 201 is configured to query the PCP server for the second address information and the second port information corresponding to the first address information and the first port information of the terminal device when a quintuple data packet is detected, and the Identification information of the terminal device.

A five-tuple data packet is detected, and the five-tuple refers to a set composed of source IP address, source port, destination IP address, destination port, and transport layer protocol number. For example, session management by a fixed network edge data gateway (IP Edge), which detects a new quintuple.

The port control protocol (Port Control Protocol, PCP) server uniformly manages the identification information, address information and port information of the connected terminal equipment, and according to the identification information of the terminal equipment, correspondingly stores the first/second The mapping relationship between address information and first/second port information. When the identification information of the terminal device is empty, it means that the terminal device is a newly accessed terminal device, and no PCP MAP message has been sent to register the identification information of the terminal device. Wherein, the first address information and the first port information respectively correspond to the address information and port information after NAPT, namely IPWAN address information and WAN port information; the second address information and the second port information respectively correspond to the address information and port information before NAPT , that is, local IP address information and local area network (Local Area Network, LAN) source port information.

According to the mapping relationship between the first/second address information and the first/second port information stored in the PCP server, the address and port information after NAPT can be used to query the corresponding address and port information before NAPT, as well as the terminal device's Identification information.

For example, IP Edge sends a "PCP Query" request message to the PCP server, which carries the IP WAN address and WAN source port in the five-tuple packet, and the PCP server queries the WAN IP address and WAN source port carried in the session request The corresponding record in the address list returns a "PCP Query" response message to IP Edge, and the queried record includes terminal device identification information, WAN IP address, local IP address, WAN source port and LAN source port.

The second determining unit 202 is configured to determine the type of the terminal device and/or port according to the query result.

In this embodiment, the second determination unit 202 includes: a first determination unit 2021 , a third determination unit 2022 , a second determination unit 2023 and a fourth determination unit 2024 .

The first judging unit 2021 is configured to judge whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache.

The third determining unit 2022 is configured to determine that the terminal device is the first type of terminal device if the determination result is no.

The second judging unit 2023 is configured to further judge whether there is a record corresponding to the second port information in the query result in the local buffer if the judging result of the first judging unit is yes.

The fourth determination unit 2024 is configured to determine that the terminal device is the second type of terminal device and the port is the first type of port if the determination result of the second determination unit is negative.

The fifth sending unit 203 is configured to send a session establishment request to the server if it is determined that the terminal device is a first type of terminal device, where the session establishment request includes identification information and port information of the terminal device.

A sixth sending unit 204, configured to send a session modification request to the server if the terminal device is a second type of terminal device and the port is a first type port, where the session modification request includes the terminal The identification information and port information of the device.

The seventh sending unit 205 is configured to send a session modification request to the server if it is determined that the terminal device is a first type of terminal device, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, wherein, The session modification request includes identification information and port information of the terminal device.

The first receiving unit 206 is configured to receive the session management response message sent by the server.

The first management unit 207 is configured to perform session management on the terminal device according to the session management policy included in the session management response message.

Before IP Edge processed a service request, it stored the identification information, address information, and port information of the terminal device in its cache area, but for new service requests, it did not store its corresponding record. Therefore, according to the identification information of the terminal device , judging whether there is a record corresponding to the identification information of the terminal device in the PCP server query result in the cache area, if the result of the judgment is no, then determining that the terminal device is the first type of terminal device, the first type of terminal device be a newly accessed terminal device; if the result of the judgment is yes, then determine that the terminal device is a second type of terminal device, and further judge whether there is a record corresponding to the LAN source port information in the PCP server query result in the cache area, If the result of the judgment is no, then determine that the port of the terminal device is a port of the first type, that is, the terminal device of the second type is an accessed terminal device that initiates a session request through a new port; if the result of the judgment is yes, is not processed.

If it is determined that the terminal device is a newly connected terminal device, a session establishment request is sent to the server, and the session establishment request carries the identification information and port information of the terminal device, so that the server is directed to the terminal device and its port information corresponding to the identification information of the terminal device Set the session management policy for the corresponding port; if it is determined that the terminal device is a connected terminal device and the port that sends the session request is a new port, then a session modification request is sent to the server, and the session modification request carries the identification information and port information of the terminal device , so that the server modifies the session management policy of the terminal device, and sets a corresponding session management policy for the newly added port. For example, the server is PCRF, and the PCRF formulates or updates policies according to the identification information and port information of the terminal equipment, the session management policy includes Quality of Service (QoS) and/or charging information, and sends a session management response message to IP Edge , which contains the session management policy. After receiving the session management response message, the IP Edge parses the session management policy therein, and executes the session management policy for the terminal device.

As a possible implementation manner, if it is determined that the terminal device is the first type of terminal device, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, then a session modification request is sent to the server.

The fourth receiving unit 208 is configured to receive the session request of the terminal device, where the session request includes the identification information of the terminal device and the port information to be released.

The eighth sending unit 209 is configured to send a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list.

A ninth sending unit 210, configured to send a session management request to the server.

As an implementation manner, the ninth sending unit 210 may further include: a tenth sending unit 2101 and an eleventh sending unit 2102 .

Wherein, the tenth sending unit 2101 is configured to send a session termination request to the server if the received session request sent by the terminal device indicates that all ports will be released;

The eleventh sending unit 2102 is configured to send a session modification request to the server if the received session request sent by the terminal device indicates that some ports will be released, and the session modification request includes the terminal device The identification information, the port number to be released, and the deletion flag.

The fifth receiving unit 211 is configured to receive a response message returned by the server for performing session management on the port to be released.

The release unit 212 is configured to release the resource occupied by the port to be released.

In one case, the end device releases one or more ports. In the scenario where a terminal device corresponds to an independent IP-CAN session, this scenario includes the case where the terminal device releases one or more ports but not all ports; in the scenario where a fixed terminal does not correspond to an independent IP-CAN session In this case, this scenario includes the situation where the end device releases one or more or all ports. Receive the session request sent by the terminal device, the request message carries the identification information of the terminal device and the port information to be released, and send to the PCP server to delete the address list corresponding to the identification information of the terminal device and the port information to be released After receiving the request message, the PCP server deletes the record corresponding to the identification information of the terminal device and the port information to be released in the address list. Then, IP Edge sends a session management request to the server. If the terminal device One or more ports are released, and the session management request is a session modification request, which includes the identification information of the terminal device and the port number to be released, and receives the session management policy update returned by the server according to the port to be released Finally, according to the response message, the session management device releases the resource occupied by the port to be released, and deletes the record corresponding to the identification information of the terminal device and the port information to be released in the cache area. The session management request is a session modification request, and the session modification request includes identification information of the terminal device, a port number to be released, and a deletion flag.

In another case, the end device releases all ports. The session management process caused by the terminal device releasing all ports is different from the session management process caused by the terminal device releasing one or more ports in that the session management request sent to the server is a session termination request, requesting the server to terminate the terminal device IP-CAN session.

According to a session management device provided in an embodiment of the present invention, the type of the terminal device and/or port is determined according to the identification information, address information and port information of the terminal device carried in the quintuple data packet, and according to the terminal device and/or or port type, request the server to generate a corresponding session management policy according to the terminal device identification information and port information, and perform session management on the terminal device according to the session management policy, which improves the session management process.

Fig. 8 is a schematic structural diagram of another embodiment of a session management device according to the present invention. As shown in Figure 8, the device 3000 includes:

The modifying unit 301 is configured to, when receiving an address matching request from a terminal device, if the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request, modify the address matching request The source address of is modified to the value in the PCP client address field;

The second sending unit 302 is configured to send the address matching request to the PCP server.

The second query unit 303 is configured to query the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device, and the identification information of the terminal device.

The second query unit 303 includes: a third sending unit 3011 , a second receiving unit 3012 , a fourth sending unit 3013 and a third receiving unit 3014 .

The third sending unit 3011 is configured to send a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and determines the terminal device corresponding to the record Whether the identification information is consistent with the identification information of the terminal device.

The second receiving unit 3012 is configured to receive an address conflict error response message returned by the PCP server if the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information.

The fourth sending unit 3013 is configured to send the address conflict error response message to the terminal device.

The third receiving unit 3014 is configured to receive the first address information and the first port corresponding to the second address information and the second port information sent by the PCP server if the record does not include the identification information of the terminal device information, and the identification information of the terminal device.

The second query unit 303 performs address matching on the terminal device. The address matching request of the terminal device is received, and the address matching request is sent to the PCP server for address matching.

In this embodiment, the IP Edge performs session management on the terminal equipment as an example, wherein the PCP server can be set up together with the IP Edge, or can be set up separately.

The RG allocates local IP addresses for the connected 3GPP mobile terminals or fixed terminals. When the RG is in the routing mode with address translation, usually the same fixed network data gateway will be connected to multiple RGs. If these RGs are all working with address translation In the routing mode, terminal devices connected to different RGs may be assigned the same local IP address. In this case of address conflict, the fixed network data gateway cannot distinguish terminals connected to different RGs only by local IP addresses and port numbers. The device, therefore, needs to be assigned a local IP address by the PCP server for address matching to ensure that it does not conflict with the local IP address of other end devices.

The IP Edge sends a "PCP MAP" request message to the PCP server, which carries identification information of the terminal device, including one or more of the terminal identification and the terminal equipment identification. The request message passes through the RG and is forwarded by the RG. The RG can add the RG identifier, and the address information and port information of the terminal device. Wherein, the terminal device can have multiple ports, and the port information includes the identification information of multiple ports. If other universal plug and play (Universal Plug and Play, UPnP) protocols are used between the terminal device and the RG, the interaction message between the UE and the RG will be replaced by the interaction message of the corresponding UPnP protocol.

When any terminal device accesses, the PCP server receives and stores the address information and port information of the terminal device before and after NAPT sent by the corresponding RG, and forms a NAPT mapping table, which stores the first/second address information of the terminal device, The mapping relationship of the first/second port information. When the identification information of the terminal device is empty, it means that the terminal device is a newly accessed terminal device, and no PCP MAP message has been sent to register the identification information of the terminal device. Wherein, the first address information and the first port information respectively correspond to the address information and port information after NAPT, that is, IP WAN address information and WAN port information; the second address information and the second port information respectively correspond to the address information and port information before NAPT Information, that is, local IP address information and local area network (Local Area Network, LAN) source port information.

After receiving the "PCP MAP" request message, the PCP server queries the NAPT mapping table stored by itself, finds the record containing the local IP address in the request message and the port information before NAPT, and judges the identification information corresponding to the record and the request message If the identification information of the terminal device in the record is inconsistent, it will receive the address conflict error response message sent by the PCP server and forward it to the terminal device; if the record does not contain the identification information of the terminal device, the PCP server will fill in the identification information of the terminal device here records. After the address matching is successful, the second address information and the second port information corresponding to the first address information and the first port information sent by the PCP server, and the identification information of the determined terminal device are received.

In addition, before sending the query message to the PCP server, if the source IP address (source IP Address) of the "PCP MAP" request message is inconsistent with the value in the PCP Client's IP Address field in the request message, The PCP server does not return an address conflict error message, but knows that the request message has passed through NAT through the inconsistency of the two addresses, queries according to the value of the parameter PCP Client's IP Address field in the message, and sends the address matching request to the PCP server.

Through this address matching process, conflicts between local IP addresses and local ports between terminal devices can be avoided.

The second determining unit 304 is configured to determine the type of the terminal device and/or port according to the query result.

The second determining unit 304 is configured to determine the type of the terminal device and/or port according to the query result.

In this embodiment, the second determination unit 304 includes: a first determination unit 3041 , a third determination unit 3042 , a second determination unit 3043 and a fourth determination unit 3044 .

The first judging unit 3041 is configured to judge whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache.

The third determining unit 3042 is configured to determine that the terminal device is the first type of terminal device if the determination result is no.

The second judging unit 3043 is configured to further judge whether there is a record corresponding to the second port information in the query result in the local buffer if the judging result of the first judging unit is yes.

The fourth determination unit 3044 is configured to determine that the terminal device is a terminal device of the second type and that the port is a port of the first type if the determination result of the second determination unit is negative.

The fifth sending unit 305 is configured to send a session establishment request to the server if it is determined that the terminal device is a first type of terminal device, where the session establishment request includes identification information and port information of the terminal device.

A sixth sending unit 306, configured to send a session modification request to the server if the terminal device is a second type of terminal device and the port is a first type port, where the session modification request includes the terminal The identification information and port information of the device.

The seventh sending unit 307 is configured to send a session modification request to the server if it is determined that the terminal device is a first type of terminal device, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, wherein, The session modification request includes identification information and port information of the terminal device.

The first receiving unit 308 is configured to receive the session management response message sent by the server.

The first management unit 309 is configured to perform session management on the terminal device according to the session management policy included in the session management response message.

After the IP Edge receives the first address information and first port information corresponding to the second address information and the second port information sent by the PCP server, and the identification information of the terminal device, the received address information and port information will be compared with the IP Edge local The address information in the cache area is compared with the port information to determine the type of terminal device and/or port, so as to send a session management request to the server according to the determined type of terminal device and/or port, receive the session management policy sent by the server, and The terminal device performs session management, and the process of performing session management from step S307 to step S314 is the same as or similar to step S202 to step S209 in the foregoing embodiment, and will not be repeated here.

According to a session management device provided by an embodiment of the present invention, during the address matching process, the type of the terminal device and/or port is determined according to the acquired identification information, address information and port information of the terminal device after the address matching is successful, according to The type of the terminal device and/or port requests the server to generate a corresponding session management strategy according to the terminal device identification information and port information, and performs session management on the terminal device according to the session management strategy, which improves the session management process; at the same time, performs address matching , to avoid address conflicts.

Fig. 9 is a schematic structural diagram of an embodiment of an address management server according to the present invention. As shown in Figure 9, the address management server 4000 includes:

The sixth receiving unit 401 is configured to receive a query message from the session management device, and the query address list includes records of the second address information, the second port information and the identification information of the terminal equipment carried in the query message.

The first returning unit 402 is configured to return an address conflict error response message to the session management apparatus if the identification information of the terminal equipment corresponding to the record is inconsistent with the identification information of the terminal equipment, so that the session management The device sends the address conflict error response message to the terminal device.

The adding unit 403 is configured to add the identification information of the terminal device to the record of the address list if the record does not include the identification information of the terminal device.

The second returning unit 404 is configured to return the record to the session management device.

In this embodiment, the session management server may be a PCP server.

The session management device sends a "PCP MAP" request message to the PCP server, which carries identification information of the terminal equipment, including one or more of the terminal identification and the terminal equipment identification. The request message passes through the RG and is forwarded by the RG. The RG can add the RG identifier, and the address information and port information of the terminal device. Wherein, the terminal device can have multiple ports, and the port information includes the identification information of multiple ports. If other universal plug and play (Universal Plug and Play, UPnP) protocols are used between the terminal device and the RG, the interaction message between the UE and the RG will be replaced by the interaction message of the corresponding UPnP protocol.

When any terminal device accesses, the PCP server receives and stores the address information and port information of the terminal device before and after NAPT sent by the corresponding RG, and forms a NAPT mapping table, which stores the first/second address information of the terminal device, The mapping relationship of the first/second port information. When the identification information of the terminal device is empty, it means that the terminal device is a newly accessed terminal device, and no PCP MAP message has been sent to register the identification information of the terminal device. Wherein, the first address information and the first port information respectively correspond to the address information and port information after NAPT, that is, IP WAN address information and WAN port information; the second address information and the second port information respectively correspond to the address information and port information before NAPT Information, that is, local IP address information and local area network (Local Area Network, LAN) source port information.

After receiving the "PCP MAP" request message, the PCP server queries the NAPT mapping table stored by itself, finds the record containing the local IP address in the request message and the port information before NAPT, and judges the identification information corresponding to the record and the request message If the identification information of the terminal device in the record is inconsistent, it will receive the address conflict error response message sent by the PCP server and forward it to the terminal device; if the record does not contain the identification information of the terminal device, the PCP server will fill in the identification information of the terminal device here records. After the address matching is successful, the second address information and the second port information corresponding to the first address information and the first port information sent by the PCP server, and the identification information of the determined terminal device are received.

According to an address management server provided by an embodiment of the present invention, through the address matching process, conflicts between local IP addresses and local ports between terminal devices can be avoided.

FIG. 10 is a schematic structural diagram of an embodiment of a server according to the present invention. As shown in Figure 10, the server 5000 includes:

The seventh receiving unit 501 is configured to receive a session management request sent by the session management apparatus, where the session management request includes identification information and port information of the terminal device.

The generating unit 502 is configured to generate a session management policy according to the terminal device identification information and port information.

A twelfth sending unit 503, configured to send a session management response message including the session management policy to the session management apparatus.

In this embodiment, the server receives the session management request sent by the session management device, where the session management request includes identification information of the terminal device, and may also include port information. Wherein, the identification information of the terminal device can uniquely identify the terminal device; one terminal device may have multiple ports, and the port information may include the identification information of the multiple ports.

The terminal device corresponding to the session management request may be any terminal device, possibly a new terminal device, or the terminal device corresponding to the session management request may be a connected terminal device, but its port may be a new port, and the server needs to A session management policy is generated according to the identification information of the terminal device, which may also include port information. The session management policy is sent to the session management device, so that the session management device manages the session request according to the session management policy.

The session management request includes a session establishment request and a session modification request. Corresponding to a new terminal device, the session management device sends a session establishment request to the server, and the server sets a new session management policy for the new terminal device according to the identification information and port information of the terminal device, and uses the session management response message to set the session management policy sent to the session management device. Corresponding to the new port of the connected terminal device, the session management device sends a session modification request to the server, and the server queries the corresponding session management strategy of the terminal device according to the identification information of the terminal device, modifies the session management strategy, and expands the session management strategy in it. The session management policy corresponding to the new port is sent to the session management device through a session management response message. Wherein, the server may be PCRF. The session management policy includes quality of service, and may also include a charging policy.

When receiving the session management request from the session management device, if the session management request is a session modification request indicating deletion of the corresponding ports, or the session management request is a session termination request, the PCRF deletes the corresponding resources of these ports and adjusts the session management strategy.

According to a server provided in an embodiment of the present invention, the server receives a request sent by a session management device to set a session management policy for a new terminal device or a new port of a connected terminal device, and sets a session management policy for the terminal device, The session management device that receives the session management policy can perform session management on the terminal device according to the session management policy, thereby perfecting the session management process.

Fig. 11 is a schematic structural diagram of an embodiment of a session management device provided by the present invention. As shown in Figure 11, the device 6000 includes:

An input device 601 , an output device 602 , a memory 603 and a processor 604 (the number of processors 604 in the session management device may be one or more, one processor is taken as an example in FIG. 11 ). In some embodiments of the present invention, the input device 601 , the output device 602 , the memory 603 and the processor 604 may be connected through a bus or in other ways, wherein connection through a bus is taken as an example in FIG. 11 .

Wherein, a set of program codes are stored in the memory 603, and the processor 604 is used to call the program codes stored in the memory 603 to perform the following operations:

When receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information, and port information of the terminal device carried in the session request;

Sending a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device;

receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message.

As an implementation manner, the receiving the session request of the terminal device includes:

A five-tuple packet is detected; or,

An address matching request from a terminal device is received.

As an implementation manner, when the processor 604 executes the detection of a 5-tuple data packet, according to the identification information, address information and port information of the terminal device carried in the session request, determine the terminal device and/or or port type steps, including:

Querying the PCP server for second address information and second port information corresponding to the first address information and first port information of the terminal device, and identification information of the terminal device;

Determine the type of the terminal device and/or port according to the query result.

As an implementation manner, after the processor 604 executes the step of receiving the address matching request of the terminal device, and the processor executes the identification information, address information and Port information, before the step of determining the type of the terminal device and/or port, the following steps are also performed:

If the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request, modify the source address of the address matching request to the value in the PCP client address field , and send the address matching request to the PCP server.

As an implementation manner, when the processor 604 executes receiving the address matching request of the terminal device, according to the identification information, address information and port information of the terminal device carried in the session request, the terminal device and/or or port type steps, including:

Querying the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device, and the identification information of the terminal device;

Determine the type of the terminal device and/or port according to the query result.

As an implementation manner, the processor 604 performs the step of querying the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device, including:

sending a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and judges that the terminal device identification information corresponding to the record is the same as the terminal device's Whether the identification information is consistent;

If the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information, receiving an address conflict error response message returned by the PCP server, and sending the address conflict error response message to the terminal device;

If the record does not include the identification information of the terminal device, receiving the first address information and the first port information corresponding to the second address information and the second port information sent by the PCP server, and the terminal device's Identification information.

As an implementation manner, the processor 604 performing the step of determining the type of the terminal device and/or port according to the query result includes:

Judging whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache;

If the judgment result is no, then determining that the terminal device is a first type of terminal device;

If the judgment result is yes, further judge whether there is a record corresponding to the second port information in the query result in the local cache;

If the further judgment result is no, it is determined that the terminal device is a second type of terminal device and that the port is a first type of port.

As an implementation manner, the processor 604 executes the step of sending a session management request to the server according to the type of the terminal device and/or port, including:

If it is determined that the terminal device is a first type of terminal device, sending a session establishment request to the server, where the session establishment request includes identification information and port information of the terminal device;

If the terminal device is a terminal device of the second type and the port is a port of the first type, a session modification request is sent to the server, where the session modification request includes identification information and port information of the terminal device.

As an implementation manner, the processor 604 executes the step of sending a session management request to the server according to the type of the terminal device and/or port, including:

If it is determined that the terminal device is a terminal device of the first type, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, a session modification request is sent to the server, wherein the session modification request includes the Identification information and port information of the terminal device.

As an implementation manner, the processor 604 also performs the following steps:

receiving a session request from the terminal device, where the session request includes identification information of the terminal device and port information to be released;

Sending a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list;

Sending a session management request to the server, and receiving a response message returned by the server for performing session management on the port to be released;

Release the resource occupied by the port to be released.

As an implementation manner, the processor 604 performing the step of sending the session management request to the server includes:

If the received session request sent by the terminal device indicates that all ports will be released, then send a session termination request to the server;

Otherwise, send a session modification request to the server, where the session modification request includes the identification information of the terminal device, the port number to be released, and a deletion flag.

It can be understood that the functions of the functional modules of the session management device 6000 in this embodiment can be specifically implemented according to the method in the above method embodiment, and the specific implementation process can refer to the relevant description of the above method embodiment, and will not be repeated here. .

According to an embodiment of a session management device provided by the present invention, the server may be requested to set and issue a corresponding session management policy for the terminal device according to the type of the terminal device and/or port, and perform session management according to the session management policy, Improved the session management process.

Fig. 12 is a schematic structural diagram of an embodiment of a session management server provided by the present invention. As shown in Figure 12, the session management server 7000 includes:

An input device 701 , an output device 702 , a memory 703 and a processor 704 (the number of processors 704 in the server can be one or more, one processor is taken as an example in FIG. 12 ). In some embodiments of the present invention, the input device 701 , the output device 702 , the memory 703 and the processor 704 may be connected through a bus or in other ways, wherein connection through a bus is taken as an example in FIG. 12 .

Wherein, a set of program codes are stored in the memory 703, and the processor 704 is used to call the program codes stored in the memory 703 to perform the following operations:

receiving a query message from the session management device, where the query address list includes records of the second address information, the second port information, and the identification information of the terminal equipment carried in the query message;

If the identification information of the terminal equipment corresponding to the record is inconsistent with the identification information of the terminal equipment, return an address conflict error response message to the session management device, so that the session management device responds with the address conflict error The message is sent to the terminal device;

If the record does not include the identification information of the terminal device, adding the identification information of the terminal device to the record in the address list, and returning the record to the session management apparatus.

The session management server may be a PCP server.

According to a session management server provided by an embodiment of the present invention, through the address matching process, conflicts between local IP addresses and local ports between terminal devices can be avoided.

Fig. 13 is a schematic structural diagram of an embodiment of a server provided by the present invention. As shown in Figure 13, the server 8000 includes:

An input device 801 , an output device 802 , a memory 803 and a processor 804 (the number of processors 804 in the server may be one or more, one processor is taken as an example in FIG. 13 ). In some embodiments of the present invention, the input device 801 , the output device 802 , the memory 803 and the processor 804 may be connected through a bus or in other ways, wherein connection through a bus is taken as an example in FIG. 13 .

Wherein, a set of program codes are stored in the memory 803, and the processor 804 is used to call the program codes stored in the memory 803 to perform the following operations:

receiving a session management request sent by the session management device, where the session management request includes identification information and port information of the terminal device;

Generate a session management policy according to the terminal device identification information and port information, and send a session management response message containing the session management policy to the session management apparatus.

Wherein, the session management policy includes service quality and/or charging policy.

According to a server provided in an embodiment of the present invention, the server receives a request sent by a session management device to set a session management policy for a new terminal device or a new port of a connected terminal device, and sets a session management policy for the terminal device, The session management device that receives the session management policy can perform session management on the terminal device according to the session management policy, thereby perfecting the session management process.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described devices and modules can refer to the corresponding process description in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or May be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, and the indirect coupling or communication connection of devices or modules may be in electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

The technical solutions of a session management method and related devices provided by the embodiments of the present invention have been described above in detail. In this paper, specific examples are used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for To help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification It should not be construed as a limitation of the invention.

Claims (24)

1. A session management method, characterized in that, comprising: When receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information, and port information of the terminal device carried in the session request; Sending a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device; receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message; The determining the type of the terminal device and/or port according to the identification information, address information and port information of the terminal device carried in the session request includes: When a quintuple data packet is detected, query the PCP server for the second address information and the second port information corresponding to the first address information and the first port information of the terminal device, as well as the identification information of the terminal device, or when receiving an address matching request from a terminal device, querying the PCP server for the first address information and first port information corresponding to the second address information and second port information of the terminal device, and the terminal device's Identification information, the first address information and the first port information correspond to address information and port information after NAPT respectively, and the second address information and second port information correspond to address information and port information before NAPT respectively; determining the type of the terminal device and/or port according to the query result; The determining the type of the terminal device and/or port according to the query result includes: Judging whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache; If the judgment result is no, then determining that the terminal device is a first type of terminal device; If the judgment result is yes, further judge whether there is a record corresponding to the second port information in the query result in the local cache; If the further judgment result is no, it is determined that the terminal device is a second type of terminal device and that the port is a first type of port. 2. The method according to claim 1, wherein the receiving the session request of the terminal device comprises: A five-tuple packet is detected; or, An address matching request from a terminal device is received. 3. The method according to claim 2, wherein after receiving the address matching request of the terminal device, and the identification information, address information and port information of the terminal device carried in the session request , before determining the type of the terminal device and/or port, further comprising: If the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request, modify the source address of the address matching request to the value in the PCP client address field , and send the address matching request to the PCP server. 4. The method according to claim 1, wherein the querying the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device comprises: sending a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and judges that the terminal device identification information corresponding to the record is the same as the terminal device's Whether the identification information is consistent; If the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information, receiving an address conflict error response message returned by the PCP server, and sending the address conflict error response message to the terminal device; If the record does not include the identification information of the terminal device, receiving the first address information and the first port information corresponding to the second address information and the second port information sent by the PCP server, and the terminal device's Identification information. 5. The method according to claim 1, wherein the sending a session management request to the server according to the type of the terminal device and/or port comprises: If it is determined that the terminal device is a first type of terminal device, sending a session establishment request to the server, where the session establishment request includes identification information and port information of the terminal device; If the terminal device is a terminal device of the second type and the port is a port of the first type, a session modification request is sent to the server, where the session modification request includes identification information and port information of the terminal device. 6. The method according to claim 1, said sending a session management request to the server according to the type of the terminal device and/or port, comprising: If it is determined that the terminal device is a terminal device of the first type, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, a session modification request is sent to the server, wherein the session modification request includes the Identification information and port information of the terminal device. 7. The method according to any one of claims 4-6, further comprising: receiving a session request from the terminal device, where the session request includes identification information of the terminal device and port information to be released; Sending a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list; Sending a session management request to the server, and receiving a response message returned by the server for performing session management on the port to be released; Release the resource occupied by the port to be released. 8. The method according to claim 7, wherein the sending a session management request to the server comprises: If the received session request sent by the terminal device indicates that all ports will be released, then send a session termination request to the server; Otherwise, send a session modification request to the server, where the session modification request includes the identification information of the terminal device, the port number to be released, and a deletion flag. 9. A session management device, comprising: The first determining unit is configured to, when receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information, and port information of the terminal device carried in the session request; A first sending unit, configured to send a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device; a first receiving unit, configured to receive a session management response message sent by the server; a first management unit, configured to perform session management on the terminal device according to the session management policy included in the session management response message; The first determination unit includes: a first query unit or a second query unit, and a second determination unit, wherein: The first query unit is configured to query the PCP server for the second address information and the second port information corresponding to the first address information and the first port information of the terminal device when a quintuple data packet is detected, and the The identification information of the terminal device; The second query unit is configured to, when receiving the address matching request of the terminal device, query the PCP server for the first address information and the first port information corresponding to the second address information and the second port information of the terminal device, and the The identification information of the terminal device; a second determining unit, configured to determine the type of the terminal device and/or port according to the query result; The second determination unit includes: A first judging unit, configured to judge whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache; A third determining unit, configured to determine that the terminal device is a terminal device of the first type if the judgment result is no; The second judging unit is configured to further judge whether there is a record corresponding to the second port information in the query result in the local buffer if the judging result of the first judging unit is yes; A fourth determining unit, configured to determine that the terminal device is a second type of terminal device and that the port is a first type of port if the judgment result of the second judgment unit is negative; Wherein, the first address information and first port information respectively correspond to address information and port information after NAPT, and the second address information and second port information respectively correspond to address information and port information before NAPT. 10. The apparatus according to claim 9, wherein the receiving the session request of the terminal device comprises: A five-tuple packet is detected; or, An address matching request from a terminal device is received. 11. The apparatus of claim 10, further comprising: A modifying unit, configured to modify the source address of the address matching request to the PCP client address if the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request the value in the field; The second sending unit is configured to send the address matching request to the PCP server. 12. The device according to claim 9, wherein the second query unit comprises: A third sending unit, configured to send a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and determines the terminal device identifier corresponding to the record Whether the information is consistent with the identification information of the terminal device; The second receiving unit is configured to receive an address conflict error response message returned by the PCP server if the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information; a fourth sending unit, configured to send the address conflict error response message to the terminal device; A third receiving unit, configured to receive first address information and first port information corresponding to the second address information and second port information sent by the PCP server if the record does not include the identification information of the terminal device , and the identification information of the terminal device. 13. The device according to claim 9, wherein the first sending unit comprises: A fifth sending unit, configured to send a session establishment request to a server if it is determined that the terminal device is a first type of terminal device, where the session establishment request includes identification information and port information of the terminal device; A sixth sending unit, configured to send a session modification request to the server if the terminal device is a second type of terminal device and the port is a first type port, wherein the session modification request includes the terminal device ID information and port information. 14. The apparatus according to claim 9, the first sending unit further comprising: A seventh sending unit, configured to send a session modification request to the server if it is determined that the terminal device is a first type of terminal device and the terminal device is determined to be a fixed terminal device according to the identification information of the terminal device, wherein the The session modification request includes identification information and port information of the terminal device. 15. The device according to any one of claims 12-14, further comprising: A fourth receiving unit, configured to receive a session request from the terminal device, where the session request includes identification information of the terminal device and port information to be released; An eighth sending unit, configured to send a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list; a ninth sending unit, configured to send a session management request to the server; A fifth receiving unit, configured to receive a response message returned by the server for performing session management on the port to be released; A release unit, configured to release the resource occupied by the port to be released. 16. The device according to claim 15, wherein the ninth sending unit comprises: A tenth sending unit, configured to send a session termination request to the server if the received session request sent by the terminal device indicates that all ports will be released; The eleventh sending unit is configured to send a session modification request to the server if the received session request sent by the terminal device indicates that some ports will be released, and the session modification request includes the terminal device's Identification information, the port number to be released, and the deletion flag. 17. A session management device, characterized in that it comprises: an input device, an output device, a memory, and a processor, wherein a set of program codes are stored in the memory, and the processor is used to call a program code stored in the memory Program code to do the following: When receiving a session request from a terminal device, determine the type of the terminal device and/or port according to the identification information, address information, and port information of the terminal device carried in the session request; Sending a session management request to a server according to the type of the terminal device and/or port, where the session management request includes identification information and port information of the terminal device; receiving a session management response message sent by the server, and performing session management on the terminal device according to the session management policy included in the session management response message; The processor executes the step of determining the type of the terminal device and/or port according to the identification information, address information and port information of the terminal device carried in the session request, including: When a quintuple data packet is detected, query the PCP server for the second address information and the second port information corresponding to the first address information and the first port information of the terminal device, as well as the identification information of the terminal device, or when receiving an address matching request from a terminal device, querying the PCP server for the first address information and first port information corresponding to the second address information and second port information of the terminal device, and the terminal device's Identification information, the first address information and the first port information correspond to address information and port information after NAPT respectively, and the second address information and second port information correspond to address information and port information before NAPT respectively; determining the type of the terminal device and/or port according to the query result; The processor executes the step of determining the type of the terminal device and/or port according to the query result, including: Judging whether there is a record corresponding to the identification information of the terminal device in the query result in the local cache; If the judgment result is no, then determining that the terminal device is a first type of terminal device; If the judgment result is yes, further judge whether there is a record corresponding to the second port information in the query result in the local cache; If the further judgment result is no, it is determined that the terminal device is a second type of terminal device and that the port is a first type of port. 18. The session management device according to claim 17, wherein the receiving the session request of the terminal device comprises: A five-tuple packet is detected; or, An address matching request from a terminal device is received. 19. The session management device according to claim 18, wherein after the processor executes the step of receiving the address matching request of the terminal device, and the processor executes the carrying The identification information, address information and port information of the terminal equipment, before the step of determining the type of the terminal equipment and/or port, the following steps are also performed: If the source address of the address matching request is inconsistent with the value in the PCP client address field in the address matching request, modify the source address of the address matching request to the value in the PCP client address field , and send the address matching request to the PCP server. 20. The session management device according to claim 17, wherein the processor performs the querying the PCP server for the first address information and the first address information corresponding to the second address information and the second port information of the terminal device. The steps of the first port information include: sending a query message to the PCP server, so that the PCP server queries the record containing the second address information and the second port information in the address list, and judges that the terminal device identification information corresponding to the record is the same as the terminal device's Whether the identification information is consistent; If the terminal device identification information corresponding to the record is inconsistent with the terminal device identification information, receiving an address conflict error response message returned by the PCP server, and sending the address conflict error response message to the terminal device; If the record does not include the identification information of the terminal device, receiving the first address information and the first port information corresponding to the second address information and the second port information sent by the PCP server, and the terminal device's Identification information. 21. The session management device according to claim 17, wherein the processor executes the step of sending a session management request to a server according to the type of the terminal device and/or port, comprising: If it is determined that the terminal device is a first type of terminal device, sending a session establishment request to the server, where the session establishment request includes identification information and port information of the terminal device; If the terminal device is a terminal device of the second type and the port is a port of the first type, a session modification request is sent to the server, where the session modification request includes identification information and port information of the terminal device. 22. The session management device according to claim 17, said processor executing said step of sending a session management request to a server according to the type of said terminal device and/or port, comprising: If it is determined that the terminal device is a terminal device of the first type, and it is determined according to the identification information of the terminal device that the terminal device is a fixed terminal device, a session modification request is sent to the server, wherein the session modification request includes the Identification information and port information of the terminal device. 23. The session management device according to any one of claims 20-22, wherein the processor further performs the following steps: receiving a session request from the terminal device, where the session request includes identification information of the terminal device and port information to be released; Sending a request to the PCP server to delete a record corresponding to the identification information of the terminal device and the port information to be released in the address list; Sending a session management request to the server, and receiving a response message returned by the server for performing session management on the port to be released; Release the resource occupied by the port to be released. 24. The session management device according to claim 23, wherein the processor performing the step of sending a session management request to the server comprises: If the received session request sent by the terminal device indicates that all ports will be released, then send a session termination request to the server; Otherwise, send a session modification request to the server, where the session modification request includes the identification information of the terminal device, the port number to be released, and a deletion flag.