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WO2012041184A1 - 一种会话管理退避指示方法及网络侧装置、和会话管理退避方法及用户设备 - Google Patents

一种会话管理退避指示方法及网络侧装置、和会话管理退避方法及用户设备 Download PDF

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Publication number
WO2012041184A1
WO2012041184A1 PCT/CN2011/080016 CN2011080016W WO2012041184A1 WO 2012041184 A1 WO2012041184 A1 WO 2012041184A1 CN 2011080016 W CN2011080016 W CN 2011080016W WO 2012041184 A1 WO2012041184 A1 WO 2012041184A1
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Prior art keywords
apn
message
session management
network side
side node
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PCT/CN2011/080016
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English (en)
French (fr)
Inventor
艾明
Original Assignee
电信科学技术研究院
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Publication of WO2012041184A1 publication Critical patent/WO2012041184A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0289Congestion control

Definitions

  • a session management backoff indication method, a network side device, and a session management backoff method and user equipment is submitted to the Chinese Patent Office on September 30, 2010, and the application number is 201010503807.9.
  • the invention name is "a session management backoff instruction”. The priority of the method and the network side device of the Chinese Patent Application, the entire contents of which is incorporated herein by reference.
  • the present invention relates to the field of wireless communication technologies, and in particular, to a session management backoff indication method and a network side device. Background technique
  • the access point name is the subscription parameter of the user equipment (UE). Different APNs correspond to different access points in the network, and the UE passes the Mobility Management (Mobility Management).
  • Entity MME
  • MME Mobility Management Entity
  • the MME determines that the connection request carries the APN, establishes a connection to the APN by establishing a connection between the access points corresponding to the APN, and determines that the connection request does not carry the APN.
  • the APN signed by the UE is assigned a default APN to establish a connection with the default APN.
  • the UE initiates a session management message carrying the activated APN, and performs session management by the MME corresponding to the activated access point of the activated APN.
  • an APN-based congestion control mechanism which is mainly as follows:
  • the MME is responsible for starting or stopping the congestion control of different APNs. If congestion control is initiated for an APN, it indicates that the APN congestion is determined according to a specific rule, and congestion control is required, and the connection request and session for the APN that opens the congestion control mechanism are rejected. management.
  • the MME When receiving the connection request sent by the UE, the MME determines that the connection request carries the APN, and determines that the connection is initiated.
  • the APN's congestion control mechanism When the APN's congestion control mechanism, it refuses to establish a connection with the APN, otherwise it establishes a connection to the APN.
  • the MME sends a connection reject message to the UE, indicating that the connection request of the UE is rejected.
  • the connection reject message carries the session management backoff timer of the APN, and the standard uses the backoff time identified by the specific format to identify the session management backoff timer and its timing. duration.
  • the UE After receiving the connection reject message, the UE starts the session management backoff timer corresponding to the APN according to the indication of the connection reject message, and does not initiate the connection request carrying the APN before the session management backoff timer expires, but may initiate carrying other APN connection request.
  • the MME determines that the APN is not carried in the connection request, and assigns a default APN according to the APN that the UE subscribes to. If the default APN congestion control mechanism is enabled, the MME refuses to establish a connection with the default APN. Then establish a connection to the default APN.
  • the MME indicates to reject the connection request of the UE by sending a connection reject message to the UE, and the connection reject message also carries a session management backoff timer corresponding to the default APN. After receiving the connection reject message, the UE initiates a session management backoff timer corresponding to the default APN. Before the session management backoff timer expires, the UE does not initiate a connection request carrying the default APN, and may initiate another APN carrying the own subscription. Connection request.
  • the UE when the UE has four subscribed APNs, they are APN1, APN2, APN3, and APN4.
  • the MME has enabled congestion control mechanisms for APNl, APN2, APN3, and APN4.
  • the MME receives the connection request and finds that APN2 and APN4 have enabled the congestion control mechanism. According to the existing method, the MME only indicates that the UE is started and in the connection reject message.
  • APN4 corresponds to the session management backoff timer TIMER4 and its timing duration. Thereafter, the UE cannot initiate a connection request carrying APN4 before the session management backoff timer of the APN4 times out, but the UE can still initiate carrying the APN2.
  • APNl or APN3 connection request If the UE subsequently initiates a connection request carrying APN2 immediately, the above mechanism will also be rejected and the APN2 session management backoff timer TIMER2 will be started.
  • the prior art causes the UE to initiate a connection request or a session management message to the APN in which the congestion control mechanism is enabled. If the MME rejects the connection request, the UE and the network resources are wasted. The user experience is not good, especially when multiple APs of the UE are enabled with the congestion control mechanism. If the network does not reject the connection request or the session management message, the load of the access point is further increased, resulting in more serious congestion. Summary of the invention
  • the network side node When the network side node needs to send a message to the user equipment UE, determining, by the UE, the access point name APN, the APN of the congestion control mechanism is enabled;
  • the network side node sends a message to the UE, where the session management backoff timer corresponding to each APN that opens the congestion control mechanism is carried.
  • the user equipment UE receives the message sent by the network side node, and determines an APN list including multiple access point names APN, and a session management backoff timer corresponding to each APN;
  • the UE starts a session management backoff timer corresponding to each APN in the APN list;
  • the network side device of the session management backoff indication provided by the embodiment of the present invention includes:
  • the congestion control APN determining unit is configured to: when the UE needs to send a message to the UE, determine an APN in which the UE is subscribed to the access point name APN and the congestion control mechanism is enabled;
  • the congestion indication unit is configured to carry, in the message, a session management backoff timer corresponding to each of the APNs that open the congestion control mechanism.
  • a receiving unit configured to receive a message sent by a network side node
  • a timer starting unit configured to start, according to the APN list that includes multiple APNs in the message, a session management backoff timer corresponding to each APN in the APN list;
  • the session management backoff unit is configured to stop initiating the connection request and the session management message carrying each of the APNs before the session management backoff timer of each APN expires according to the backoff time corresponding to each APN in the message. .
  • the session management backoff indication method and the network side device, the session management backoff method and the user equipment provided by the present invention have the following beneficial effects: Since the access point corresponding to the APN that the UE subscribes to, all the access points that are congested are in the Indicates to the UE in the same return message, which saves signaling overhead between the UE and the network, improves the user experience, and avoids more congestion. DRAWINGS
  • FIG. 1 is a flowchart of a session management backoff indication method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a session management backoff method according to an embodiment of the present invention.
  • FIG. 3 is a structural diagram of a network side device for performing a session management backoff indication according to an embodiment of the present invention
  • FIG. 4 is a structural diagram of a user equipment for performing session management backoff according to an embodiment of the present invention. detailed description
  • the session management backoff indication method, the network side device, the session management backoff method, and the user equipment proposed by the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.
  • the APN-based congestion control mechanism is discussed, and it is determined that this mechanism can also be used for APN congestion caused by common UEs.
  • the network side node instructs the UE to start the session management backoff timer of the APN, and the UE starts immediately after receiving the indication.
  • the session management backoff timer of the APN does not initiate an access point connection request corresponding to the APN until the session management backoff timer expires.
  • the existing congestion control mechanism is applied to the situation where the UE subscribes to multiple APNs and multiple APNs open the congestion control mechanism. Shape, resulting in waste of UE and network resources, and the user experience is not good. Therefore, the embodiment of the present invention provides a session management backoff indication method, as shown in FIG. 1 , including:
  • Step S101 When the network side node needs to send a message to the UE, determine that the APN of the APN that is subscribed by the UE has the APN with the congestion control mechanism enabled;
  • Step S102 The network side node sends a message to the UE, where the session management backoff timer corresponding to each APN that starts the congestion control mechanism is carried.
  • the access point here is specifically a Packet Data Network (PDN), and different APNs correspond to different PDNs. Therefore, the connection established between the UE and the access point in this embodiment is called a PDN connection.
  • PDN Packet Data Network
  • the method of the present invention can be applied to an Evolved Packet System (EPS), and can also be applied to a GPRS system.
  • EPS Evolved Packet System
  • the network side node herein refers to a mobility management entity MME.
  • the network side A node refers to a Serving GPRS Support Node (SGSN) serving a General Packet Radio Service (GPRS).
  • SGSN Serving GPRS Support Node
  • GPRS General Packet Radio Service
  • the embodiment of the present invention takes the MME of the EPS system as an example.
  • the network side node maintains the APN with multiple UE subscriptions. If the network side node determines that a certain APN has a congestion control mechanism for all APNs maintained, the network side determines that the APN is congested according to a specific rule and needs congestion control.
  • the network side determines how the APN is congested according to a specific rule and needs to perform congestion control, which can be implemented by using existing technologies, and will not be described in detail herein.
  • connection request or session management message sent by the UE to the network side node generally only carries one APN that the UE subscribes to, and the existing method is only for the APN.
  • the APN is determined to enable the congestion control mechanism
  • the session management with the APN is backed off.
  • the timer of the present invention determines whether the congestion control mechanism is enabled for all APNs subscribed by the UE.
  • the embodiment of the present invention utilizes a timing of sending a message to the UE, for example, an active-initiated message or a response message to the UE request message, and a session management back-off timer corresponding to all APNs in the APN that the UE subscribes to have the congestion control mechanism enabled. Therefore, when the UE receives the message, the session management backoff timer corresponding to each APN in the message is started.
  • the above-mentioned session management backoff indication method provided by the present invention determines whether all the APNs that are subscribed to by the UE determine whether the congestion control mechanism is enabled, and when the UE sends a message to the UE, all the APNs of the APN that are contracted by the UE are enabled.
  • the respective session management backoff timers are sent to the UE together, so that the session management backoff timer corresponding to all the APNs that are likely to be accessed by the UE may be indicated to the UE together, and the UE is in each APN.
  • the signaling overhead between the UE and the network improves the user experience while avoiding more congestion.
  • the foregoing message in this embodiment specifically includes the following content:
  • APN list consisting of APNs that have congestion control mechanisms enabled
  • the backoff time corresponding to each APN in the APN list the backoff time indicating the session management backoff timer in a specific format.
  • the UE shall start the session management backoff timer of the APN in the APN list, and the backoff time corresponding to any APN in the APN list represents the time duration of the session management backoff timer corresponding to the APN.
  • the foregoing message sent by the network side node in the embodiment of the present invention is specifically, when the network side node receives the connection request that carries the APN sent by the UE, and returns a connection rejection message to the UE when the APN starts the congestion control, or
  • the APN activates the default bearer request message returned to the UE when congestion control is not enabled. That is, the two types of response messages of the existing connection request are extended.
  • the connection rejection message is also used by other UEs to enable the congestion control mechanism.
  • the APN session management backoff timer carries a connection reject message.
  • connection request of the APN that is sent by the UE that is received by the network side node in this embodiment is specifically a connection request sent by the UE in the attaching process, or a connection request sent by the UE after being attached to the network, for example, sent in a cell update process.
  • Connection request is specifically a connection request sent by the UE in the attaching process, or a connection request sent by the UE after being attached to the network, for example, sent in a cell update process.
  • Connection request may also be a session management response message returned by the network side node to the UE according to the session management process when receiving the session management message carrying the APN sent by the UE.
  • a session management backoff method is also provided in the embodiment of the present invention. As shown in FIG. 2, the method includes:
  • Step S201 The user equipment UE receives the message sent by the network side node.
  • the message carries the session management backoff timer of all APNs in the APN that the UE subscribes to, and the form of the message is consistent with the corresponding description in the foregoing embodiment.
  • the network side node may specifically be an SGSN or an EPS system in the GPRS system. MME in.
  • Step S202 The UE starts a session management backoff timer corresponding to each APN in the APN list carried in the message according to the message sent by the network side node.
  • the UE itself subscribes to multiple APNs.
  • the UE For the activated APN, the UE establishes a connection with the APN, and the UE sends a session management message to the APN as needed.
  • the UE For the inactive APN, the UE does not establish a connection with the APN, and the UE sends a connection request to the APN as needed.
  • the session management backoff timer of all APNs (including active and inactive) in the APN list can be simultaneously started.
  • Step S203 For each APN in the APN list, the UE indicates according to the message sent by the network side node.
  • the backoff time corresponding to the APN stops sending a connection request and session management message for the APN before the session management backoff timer of the APN times out.
  • the UE may initiate a connection request and a session management message carrying a specific APN, and the specific APN refers to an APN other than the APN included in the APN list in the APN that the UE subscribes to.
  • the session management message of the APN if it is an inactive APN, stops initiating a connection request carrying the APN. Therefore, it is avoided to send a connection request and a session management message to an APN that can access the congestion control mechanism.
  • the session management backoff indication method and the session management backoff method provided by the present invention can be applied to an EPS system or a GPRS system.
  • the following takes the EPS system as an example, and provides a specific implementation manner of the session management backoff indication method and the session management backoff method according to the specific application scenario.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the application scenario is specifically as follows: The UE subscribes to APN1, APN2, APN3, APN4, and APN5; the UE has attached to the network through an Attach procedure, and has activated the connection to APN1 and APN2, and APN1 and APN2 are activated APNs, APN3. , APN4 and APN5 are inactive APNs.
  • the UE sends a PDN connection request carrying the access point name of the APN3 to the MME, requesting to establish a connection with the APN3.
  • the MME receives the connection request from the UE, the MME has initiated a congestion control mechanism for APNK APN3 and APN4, but does not initiate a congestion control mechanism for APN2.
  • the MME sends a PDN connection reject message to the UE, where the message includes APN1, APN3, APN4 and their respective backoff times.
  • the UE After receiving the PDN connection reject message returned by the MME, the UE starts the session management backoff timers of APN1, APN3, and APN4 respectively, and according to the corresponding session management backoff time, the UE cannot initiate the timeout before the three session management backoff timers expire.
  • a session management message carrying APN1 cannot initiate a connection request message carrying APN3 and APN4.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the application scenario is specifically as follows: The UE subscribes to APN1, APN2, APN3, APN4, and APN5; the UE has attached to the network through the attach procedure, and has activated the connection to APN1 and APN2, APN1, APN2 are activated APN, APN3, APN4, and APN5 is an inactive APN.
  • the UE sends a connection request carrying the APN3 to the MME, requesting to establish a connection with the APN3.
  • the MME receives the connection request from the UE, the MME has initiated a congestion control mechanism for APN1 and APN4, but does not initiate a congestion control mechanism for APN2 and APN3.
  • the MME sends an activation default bearer request to the UE, where the message includes APN 1 APN4 and their respective backoff times.
  • the UE After receiving the activated default bearer request message returned by the MME, the UE activates the default of APN3 according to the existing process.
  • the bearer needs to start the session management backoff timer of APN1 and APN4 respectively. According to the corresponding backoff time, the UE cannot initiate the session management message carrying APN1 and cannot initiate the APN4 carrying the APN1 before the two session management backoff timers expire. Connection request message.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a specific content form of the content of the PDN connection reject message is given. As shown in Table 1 below, the YY item is added to the message content in the message content relative to the existing PDN connection reject message.
  • the definition of the other items in the PDN connection reject message may be referred to the definition of the existing standard.
  • the following is a description of the backoff timer list (IE) added in the embodiment of the present invention.
  • the backoff time list here specifically includes all congestion occurrences.
  • the APN list consisting of the corresponding APNs of the access points; and the Back Off timer corresponding to each APN in the APN list.
  • Table 2 the definition of the Back Off timer list IE in this embodiment is as follows:
  • the identifier of each APN in the Back Off Timer list IE uses the BEARER ID corresponding to the activated connection of the UE to the APN.
  • the above embodiment of the present invention is only a PDN CONNECTIVITY REJECT message.
  • it may be any session management response message returned by the network after receiving the session management message sent by the UE.
  • congestion will be enabled.
  • the session management backoff timer of the APN of the control mechanism is sent to the UE by using the coding method mentioned in the third embodiment.
  • These session management response messages can be any of the following messages:
  • a BEARER RESOURCE ALLOCATION REJECT message a BEARER RESOURCE MODIFICATION REJECT message; a DEACTIVATE EPS BEARER CONTEXT REQUEST message;
  • the trigger conditions, the sending subject and the role of each of the above messages are sent. See the definitions in the existing standards. Detailed.
  • the foregoing embodiment is a specific implementation process when applied to an EPS system.
  • the specific implementation manner is the same as the foregoing embodiment, except that the network side node is an SGSN.
  • the name of the PDN connection related signaling message between the SGSN and the UE is also different. Specific differences are given below for each of the above embodiments.
  • the UE is referred to as a mobile station (MS) in the GPRS related specification.
  • MS mobile station
  • the setting scene is unchanged.
  • the UE needs to activate the connection to APN3, it establishes a connection to APN3 by sending an Activate Packet Data Protocol (PDP) Context Request (ACTIVATE PDP CONTEXT REQUEST) message.
  • PDP Packet Data Protocol
  • ACTIVATE PDP CONTEXT REQUEST Activate Packet Data Protocol
  • the UE sends a message to the network node SGSN, which is an ACTIVATE PDP CONTEXT REQUEST message, where the request message includes the ⁇ to be established, and when the SGSN accepts the request, it returns to the UE.
  • the message is an ACTIVATE PDP CONTEXT ACCEPT message.
  • the SGSN rejects the request, the message returned to the UE is an ACTIVATE PDP CONTEXT REJECT message.
  • the network can also initiate a PDP context request, which is a network initiated context activation process.
  • PDP context request is a network initiated context activation process.
  • the SGSN sends a Request PDP Context Context (REQUEST PDP CONTEXT ACTIVATION) message to the UE.
  • REQUEST PDP CONTEXT ACTIVATION Request PDP Context Context
  • the UE initiates the PDP context activation process initiated by the UE. If the UE does not accept the request, then the request PDP context activation is denied to the SGSN.
  • the signaling messages sent by the network to the UE can be used to carry APN1, APN4 and their respective session management backoff times.
  • the session management message sent by the SGSN to the UE may carry the APN with congestion control and the corresponding session management backoff time. These messages are:
  • Modify the PDP context request (MODIFY PDP CONTEXT REQUEST) message
  • Modify the PDP context accept ( MODIFY PDP CONTEXT ACCEPT ) message
  • SM Session Management
  • STATUS Session Management
  • the APN and the session management backoff timer carried in the foregoing message may also use the APN and session management backoff timer coding formats mentioned in Embodiment 3.
  • a network side device for providing a session management backoff indication.
  • the method includes: an open congestion control APN determining unit 301, configured to determine the UE when a message needs to be sent to the UE.
  • the APN of the subscribed access point name APN is used to enable the congestion control mechanism.
  • the congestion indication unit 302 is configured to send a message to the UE, where the session management backoff time information corresponding to the APN of each of the congestion control mechanisms is carried.
  • the network side device is specifically an SGSN in a general packet radio service system, or a mobility management entity in an EPS system.
  • the open congestion control APN determining unit 301 is specifically configured to send an APN list including the APN in which the congestion occurs, and a backoff time message corresponding to each APN in the APN list. That is, the message sent by the open congestion control APN determining unit 301 to the UE includes: an APN list consisting of the APNs that open the congestion control mechanism; and a backoff time corresponding to each APN in the APN list.
  • the user equipment of the session management backoff is further provided in the embodiment of the present invention.
  • the method includes: a receiving unit 401, configured to receive a message sent by a network side node, and determine, by using the access point name, an APN.
  • the APN stops sending a connection request and session management message for the APN before the session management backoff timer of the APN times out.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Description

一种会话管理退避指示方法及网络侧装置、 和会话管理退避方法及用户设备 本申请要求在 2010年 9月 30日提交中国专利局、 申请号为 201010503807.9、发明名称为 "一种会话管理退避指示方法及网络侧装置"的中国专利申请的优先权, 其全部内容通过引 用结合在本申请中。 技术领域
本发明涉及无线通信技术领域, 尤其涉及一种会话管理退避指示方法及网络侧装置。 背景技术
接入点名称 ( Access Point Name, APN )是用户设备 ( User Equipment, UE ) 的签约 参数, 不同 APN与网络中不同接入点对应, UE经移动性管理实体(Mobility Management
Entity, MME ), 与该 UE签约的 APN建立连接及进行会话管理。
MME接收到 UE发送的连接请求时,确定该连接请求中携带 APN,通过建立与该 APN 对应的接入点之间的连接来建立到该 APN的连接, 确定该连接请求中未携带 APN时, 根 据 UE签约的 APN为其分配一个默认 APN, 建立与该默认 APN间的连接。 UE与 APN建 立连接后, 确定该 APN激活。 之后 UE发起携带激活的 APN的会话管理消息, 经 MME 与该激活的 APN对应的接入点进行会话管理。
为了避免接入点由于网络负荷比较大时造成网络拥塞, 现有技术提出了基于 APN 的 拥塞控制机制, 主要如下:
由 MME负责启动或停止不同 APN的拥塞控制, 如果对某个 APN启动了拥塞控制, 则说明根据特定规则确定该 APN拥塞,且需拥塞控制,拒绝针对开启拥塞控制机制的 APN 的连接请求及会话管理。
MME接收到 UE发送的连接请求时, 确定该连接请求中携带 APN, 且确定启动了该
APN的拥塞控制机制时, 拒绝与该 APN建立连接, 否则建立到该 APN的连接。 MME通 过向 UE发送连接拒绝消息, 指示拒绝 UE的连接请求, 该连接拒绝消息携带有该 APN的 会话管理退避定时器, 标准中用特定格式标识的退避时间来标识会话管理退避定时器及其 定时时长。 UE接收到连接拒绝消息后, 根据连接拒绝消息的指示, 启动 APN对应的会话 管理退避定时器, 在该会话管理退避定时器超时前, 不再发起携带该 APN 的连接请求, 但是可发起携带其它 APN的连接请求。
MME确定该连接请求中未携带 APN时,根据 UE签约的 APN为其分配一个默认 APN, 如果启动了该默认 APN的拥塞控制机制, 则拒绝与该默认 APN建立连接, 如果没有启动 则建立到该默认 APN的连接。 MME通过向 UE发送连接拒绝消息指示拒绝 UE的连接请 求, 该连接拒绝消息还携带默认 APN对应的会话管理退避定时器。 UE接收到连接拒绝消 息后, 启动与默认 APN对应的会话管理退避定时器, 在该会话管理退避定时器超时前, 不再发起携带该默认 APN的连接请求, 可以发起携带自身签约的其它 APN的连接请求。
举例来说, 当 UE有四个签约的 APN, 分别是 APN1、 APN2、 APN3、 APN4。 MME 对 APNl、 APN2、 APN3、 APN4开启了拥塞控制机制。
如果 UE发起携带 APN4的连接请求到 MME, MME接收到该连接请求时发现 APN2 和 APN4开启了拥塞控制机制。按照现有方法, MME在连接拒绝消息中仅指示 UE启动与
APN4对应的会话管理退避定时器 TIMER4及其定时时长。此后, UE在该 APN4的会话管 理退避定时器超时前,不能发起携带 APN4的连接请求,但是 UE还是可以发起携带 APN2、
APNl或 APN3的连接请求。 如果 UE后续立即发起携带 APN2的连接请求, 按照上述机 制也将遭到拒绝并启动 APN2的会话管理退避定时器 TIMER2。
可见, 对于 UE有多个签约 APN的情形, 现有技术使得 UE还是会向发生开启拥塞控 制机制的 APN发起连接请求或会话管理消息, 如果 MME拒绝连接请求, 则浪费了 UE和 网络的资源, 且用户体验不好, 特别是 UE的多个 APN都开启拥塞控制机制的情形; 如果 网络不拒绝连接请求或会话管理消息,则会进一步加重接入点的负荷,导致拥塞更加严重。 发明内容
本发明实施例提供一种会话管理退避指示方法及网络侧装置、 会话管理退避的方法及 用户设备, 用以优化现有的会话管理退避指示流程。
本发明实施例提供的一种会话管理退避指示方法, 包括:
网络侧节点在需要向用户设备 UE发送消息时, 确定所述 UE签约的接入点名称 APN 中开启拥塞控制机制的 APN;
所述网络侧节点向所述 UE发送消息,其中携带每一开启拥塞控制机制的 APN对应的 会话管理退避定时器。
本发明实施例提供的一种会话管理退避方法, 包括:
用户设备 UE接收网络侧节点发送的消息, 并从中确定包括多个接入点名称 APN的 APN列表, 以及每个 APN对应的会话管理退避定时器;
UE启动所述 APN列表中每个 APN对应的会话管理退避定时器;
对于每个 APN, 在该 APN的会话管理退避定时器超时前, 停止发起针对该 APN的连 接请求和会话管理消息。 本发明实施例提供的一种会话管理退避指示的网络侧装置, 包括:
开启拥塞控制 APN确定单元, 用于在需要向 UE发送消息时, 确定所述 UE签约的接 入点名称 APN中开启拥塞控制机制的 APN;
拥塞指示单元, 用于在所述消息中携带所述开启拥塞控制机制的 APN各自对应的会 话管理退避定时器。
本发明实施例提供的一种会话管理退避的用户设备, 包括:
接收单元, 用于接收网络侧节点发送的消息;
定时器启动单元, 用于根据所述消息中包括多个 APN的 APN列表, 启动所述 APN 列表中每个 APN对应的会话管理退避定时器;
会话管理退避单元, 用于根据所述消息中每个 APN对应的退避时间, 在该每个 APN 的会话管理退避定时器超时前, 停止发起该携所述每个 APN的连接请求和会话管理消息。
利用本发明提供的会话管理退避指示方法及网络侧装置、 会话管理退避的方法及用户 设备, 具有以下有益效果: 由于将 UE签约的 APN对应的接入点中, 所有发生拥塞的接入 点在同一返回消息中指示给 UE, 节省了 UE和网络之间的信令开销, 提高了用户体验, 同 时避免发生更多的拥塞。 附图说明
图 1为本发明实施例提供的会话管理退避指示方法的流程图;
图 2为本发明实施例提供的会话管理退避方法的流程图;
图 3为本发明实施例提供的用于执行会话管理退避指示的网络侧装置的结构图; 图 4为本发明实施例提供的用于执行会话管理退避的用户设备的结构图。 具体实施方式
下面结合附图和实施例对本发明提出的会话管理退避指示方法及网络侧装置、 会话管 理退避的方法及用户设备, 进行更详细地说明。
在 3GPP的机器到机器通信规范制订过程中, 讨论了基于 APN的拥塞控制机制, 并决 定该机制也可以用于普通 UE引起的 APN拥塞情形。 目前在该机制种, 提到了当 UE请求 到某个 APN的连接时, 如果该 APN开启拥塞机制, 则网络侧节点指示 UE启动该 APN的 会话管理退避定时器, UE收到该指示后立即启动该 APN的会话管理退避定时器, 在该会 话管理退避定时器超时之前, 不再发起到该 APN对应的接入点连接请求。
现有拥塞控制机制应用于 UE签约有多个 APN且有多个 APN开启拥塞控制机制的情 形, 造成了 UE和网络资源的浪费, 且用户体验不好。 因此, 本发明实施例提供一种会话 管理退避指示方法, 如图 1所示, 包括:
步骤 S101 : 网络侧节点在需要向 UE发送消息时,确定 UE签约的 APN中开启了拥塞 控制机制的 APN;
步骤 S102: 网络侧节点向 UE发送消息, 其中携带每一开启拥塞控制机制的 APN对 应的会话管理退避定时器。
不同的 APN对应不同的接入点, UE需要与某个 APN对应的接入点之间建立连接, 才能访问该接入点对应的分数数据网。 这里的接入点具体为分组数据网 (Packet Data Network, PDN ), 不同的 APN对应不同的 PDN。 因此, 本实施例中将在 UE与接入点之 间建立的连接称为 PDN连接。
本发明方法可以应用于分组演进系统(Evolved Packet System, EPS ), 也可以应用于 GPRS系统,应用于 EPS系统时,这里的网络侧节点指移动性管理实体 MME,应用于 GPRS 系统时, 网络侧节点指服务通用分组无线业务( General Packet Radio Service, GPRS )支持 节点 ( Serving GPRS Support Node, SGSN )。 本文实施例以 EPS系统的 MME为例。
网络侧节点维护有多个 UE签约的 APN, 网络侧节点对于维护的所有 APN, 如果确定 某个 APN开启了拥塞控制机制, 说明网络侧根据特定规则确定 APN拥塞且需要进行拥塞 控制。
其中, 网络侧如何根据特定规则确定 APN拥塞且需要进行拥塞控制, 可以利用现有 技术实现, 这里不再详述。
UE向网络侧节点发送的连接请求或会话管理消息一般仅携带该 UE签约的一个 APN, 而现有方法也仅针对该 APN, 在确定该 APN开启拥塞控制机制时, 携带该 APN的会话管 理退避定时器, 而本发明实施例对 UE签约的所有 APN是否开启拥塞控制机制进行判断。
本发明实施例利用向 UE发送消息的时机, 例如, 可以是主动发起的消息或对 UE请 求消息的响应消息, 携带 UE签约的 APN中所有开启拥塞控制机制的 APN各自对应的会 话管理退避定时器,从而使 UE接收到该消息时, 启动该消息中所有 APN各自对应的会话 管理退避定时器。
本发明提供的上述会话管理退避指示方法,由于网络侧节点对 UE签约的所有 APN是 否开启拥塞控制机制进行判断, 并在向 UE发送消息时, 将 UE签约的 APN中所有开启拥 塞控制机制的 APN各自对应的会话管理退避定时器一并发送给 UE, 从而实现将 UE有可 能接入的所有发生拥塞的接入点对应的 APN的会话管理退避定时器一并指示给 UE, UE 在每个 APN的会话管理退避定时器超时前, 停止发起针对这些 APN的连接请求和会话管 理消息。 因此, UE会暂时不向开启拥塞控制机制的 APN请求接入或会话管理, 节省了
UE和网络之间的信令开销, 提高了用户体验, 同时避免发生更多的拥塞。
优选地, 本实施例中上述消息具体包括以下内容:
开启拥塞控制机制的 APN组成的 APN列表;
与 APN列表中每个 APN对应的退避时间, 该退避时间用特定格式表示会话管理退避 定时器。
UE应启动 APN列表中的 APN的会话管理退避定时器, APN列表中的任一 APN对应 的退避时间, 代表了该 APN对应的会话管理退避定时器的定时时长。
优选地, 本发明实施例中网络侧节点发送的上述消息, 具体为网络侧节点接收到 UE 发送的携带 APN的连接请求时, 在该 APN开启拥塞控制时向 UE返回的连接拒绝消息, 或该 APN未开启拥塞控制时向 UE返回的激活默认承载请求消息。即对现有的连接请求的 两种响应消息进行扩展, 例如, 在连接拒绝消息中除了携带之前连接请求中指示的 APN 的会话管理退避定时器外,还将 UE签约的其它开启拥塞控制机制的 APN的会话管理退避 定时器携带在连接拒绝消息。
本实施例中网络侧节点接收的 UE发送的携带 APN的连接请求,具体为 UE在附着过 程中发送的连接请求, 或为 UE在附着到网络后发送的连接请求, 例如在小区更新过程中 发送的连接请求。 当然, 网络侧节点发送的上述消息还可以是网络侧节点接收到 UE发送 的携带 APN的会话管理消息时, 根据会话管理进程向 UE返回的会话管理响应消息。
本发明实施例中还提供了一种会话管理退避方法, 如图 2所示, 包括:
步骤 S201 : 用户设备 UE接收网络侧节点发送的消息;
该消息中携带 UE签约的 APN中所有开启拥塞控制的 APN的会话管理退避定时器, 该消息的形式与上述实施例中的相应描述一致, 网络侧节点具体可以是 GPRS 系统中的 SGSN或 EPS系统中的 MME。
步骤 S202: UE根据网络侧节点发送的消息, 启动该消息中携带的 APN列表中每个 APN对应的会话管理退避定时器;
UE自身签约有多个 APN, 对于激活的 APN, 说明 UE与该 APN建立了连接, UE会 根据需要向该 APN发送会话管理消息。 对于未激活的 APN, 说明 UE未与该 APN建立连 接, UE会根据需要向该 APN发送连接请求。
如果 UE接收到上述携带会话管理退避定时器的消息,根据 APN列表, 可以同时启动 APN列表中所有 APN (包括激活的和未激活的) 的会话管理退避定时器。
步骤 S203: 对于 APN列表中的每一 APN, UE根据网络侧节点发送的消息中指示的 该 APN对应的退避时间, 在该 APN的会话管理退避定时器超时前, 停止发起针对该 APN 的连接请求和会话管理消息。
优选地, UE可以发起携带特定 APN的连接请求和会话管理消息, 特定 APN指 UE 签约的 APN中除了 APN列表中包括的 APN之外的 APN。
即对于启动的 APN的会话管理退避定时器, 如果是激活的 APN, 则停止发起携带该
APN的会话管理消息, 如果是未激活的 APN, 则停止发起携带该 APN的连接请求。 从而 避免向自身能够接入开启拥塞控制机制的 APN发送连接请求和会话管理消息。
本发明给出的会话管理退避指示方法及会话管理退避方法, 即可以应用于 EPS系统, 也可以应用于 GPRS系统。 下面以 EPS系统为例, 结合具体应用场景给出本发明会话管理 退避指示方法及会话管理退避方法的具体实施方式。
实施例一:
应用场景具体为: UE签约了 APN1、 APN2、 APN3、 APN4和 APN5; UE已经通过附 着 (Attach )过程附着到网络, 并已经激活了到 APN1和 APN2的连接, APN1、 APN2为 激活的 APN, APN3、 APN4和 APN5为未激活的 APN。
此时, UE发送携带 APN3的接入点名称的 PDN连接请求到 MME, 请求与 APN3建 立连接。 MME收到 UE的该连接请求时, MME已经启动了对 APNK APN3和 APN4的 拥塞控制机制, 而未启动对 APN2的拥塞控制机制。 MME向 UE发送 PDN连接拒绝消息, 该消息中包括 APN1、 APN3、 APN4及其各自对应的退避时间。
UE收到 MME返回的 PDN连接拒绝消息后,分别启动 APN1、 APN3和 APN4的会话 管理退避定时器, 根据各自对应的会话管理退避时间, 在这三个会话管理退避定时器超时 之前, UE不能发起携带 APN1的会话管理消息, 不能发起携带 APN3和 APN4的连接请 求消息。
实施例二:
应用场景具体为: UE签约了 APN1、 APN2、 APN3、 APN4和 APN5; UE已经通过附 着过程附着到网络,并已经激活了到 APN1和 APN2的连接, APN1、 APN2为激活的 APN, APN3、 APN4和 APN5为未激活的 APN。
此时, UE发送携带 APN3的连接请求到 MME, 请求建立与 APN3建立连接。 MME 收到 UE的该连接请求时, MME已经启动了对 APN1和 APN4的拥塞控制机制, 而未启动 对 APN2、APN3的拥塞控制机制。 MME向 UE发送激活默认承载请求,该消息中包括 APN 1 APN4及其各自对应的退避时间。
UE收到 MME返回的激活默认承载请求消息后, UE按照现有流程激活 APN3的默认 承载,还需要分别启动 APN1和 APN4的会话管理退避定时器,根据各自对应的退避时间, 在这两个会话管理退避定时器超时之前, UE不能发起携带 APN1 的会话管理消息, 不能 发起携带 APN4的连接请求消息。
实施例三:
本实施例中给出上述 PDN连接拒绝消息内容的具体内容形式, 如下面的表一所示, 该消息内容中相对于现有 PDN连接拒绝消息增加了 YY项——退避时间列表。
Figure imgf000009_0001
PDN连接拒绝消息内容
PDN连接拒绝消息中其它项定义, 可参考现有标准的定义, 下面对本发明实施例中增 加的退避时间列表(Back Off timer list IE )进行描述, 这里的退避时间列表具体包括由所 有发生拥塞的接入点各自对应的 APN组成的 APN列表; 与 APN列表中每个 APN对应的 退避时间 ( Back Off timer )。 如下面的表二所示, 为本实施例中 Back Off timer list IE的定 义描述:
8 7 6 5 4 3 2 1
Back Off timer list IE标识 字节 (octet ) 1
APN 1的标识 octet 2 APN 1对应的退避时间 Back Off timer octet 3
octet i
octet
octet 1*
APN n的标识 octet 1+1*
octet
APN n对应的退避时间 Back Off timer octet m+1*
octet
Back Off timer list IE的定义
具体地, 上述 Back Off timer list IE中每个 APN对应的退避时间, 可以釆用通用分组 无线业务(GPRS ) 系统定义的定时器的格式表示, 目前 GPRS系统定义的定时器有两个: GPRS 定时器(TIMER ) 1和 GPRS TIMER 2。 如果现有的 GPRS定时器的定时时长不能 满足需要, 当然也可以对这两个定时器进行扩展, 例如增加或者修改编码格式, 以表示更 长的时间。 APN列表中每个 APN, 釆用 APN对应的编码来表示。
优选地, 上述 Back Off timer list IE中每个 APN的标识, 釆用 UE到 APN的已激活的 连接所对应的 载标识( BEARER ID )。
本发明上述实施例仅以 PDN连接拒绝(PDN CONNECTIVITY REJECT ) 消息为例, 当然, 也可以是网络在接收到 UE发送的会话管理消息后返回的任何会话管理响应消息, 在任何情况下将开启拥塞控制机制的 APN 的会话管理退避定时器, 通过实施例三中提到 的编码方式发送给 UE。 这些会话管理响应消息可以是如下消息中任一个:
激活专用 EPS承载上下文请求( ACTIVATE DEDICATTED EPS BEARER CONTEXT REQUEST ) 消息;
激活缺省 EPS 承载上下文请求 (ACTIVATE DEFAULT EPS BEARER CONTEXT
REQUEST ) 消息;
承载资源分配拒绝( BEARER RESOURCE ALLOCATION REJECT ) 消息; 承载资源修改拒绝( BEARER RESOURCE MODIFICATION REJECT ) 消息; 去激活 EPS承载上下文请求( DEACTIVATE EPS BEARER CONTEXT REQUEST )消 息;
EPS会话管理(EPS Session Management, ESM )状态 (status ) 消息;
修改 EPS承载上下文请求( Modify EPS BEARER CONTEXT RQUEST ) 消息; 去连接拒绝( PDN DISCONNECT REJECT ) 消息。
上述各个消息发送的触发条件、 发送主体及作用, 参见现有标准中的定义, 这里不再 详述。
上述实施例为应用于 EPS系统时的具体实施过程,本发明提出的方法应用于 GPRS时, 具体实施方式同上述实施方式, 不同的是网络侧节点为 SGSN。 SGSN和 UE之间的 PDN 连接相关信令消息的名称, 也是不同的。 下面针对上述各实施例, 给出具体的不同之处。 UE在 GPRS相关规范中称作移动台 (MS ), 本发明提到 UE时, 泛指 UE和 /或 MS。
当实施例一和实施例二应用到 GPRS时, 支定场景不变。 UE需要激活到 APN3的连 接时, 通过发送激活分组数据协议 ( Packet Data Protocol , PDP )上下文请求(ACTIVATE PDP CONTEXT REQUEST )消息,建立到 APN3的连接。按照 UE发起的上下文激活过程, UE发送给网络节点 SGSN的消息, 为激活 PDP上下文请求( ACTIVATE PDP CONTEXT REQUEST )消息, 该请求消息中包含要建立的 ΑΡΝ , SGSN接纳该请求时, 返回给 UE的 消息是激活 PDP上下文接受 ( ACTIVATE PDP CONTEXT ACCEPT ) 消息, SGSN拒绝该 请求时, 返回给 UE的消息是激活 PDP上下文拒绝( ACTIVATE PDP CONTEXT REJECT ) 消息。
在 GPRS系统中,网络也可以发起 PDP上下文请求,此为网络发起的上下文激活过程。 针对该场景, 网络要激活 APN5 的 PDP 上下文, 则 SGSN发送请求 PDP 上下文激活 ( REQUEST PDP CONTEXT ACTIVATION )消息给 UE, UE如果接纳该请求, 则启动 UE 发起的 PDP上下文激活过程。 如果 UE不接纳该请求, 则发送请求 PDP上下文激活拒绝 给 SGSN。
在上述过程中, 由网络发送给 UE的信令消息中, 均可以用来携带 APN1、 APN4及其 各自对应的会话管理退避时间。
不仅仅局限于上述消息, 凡是 SGSN发给 UE的会话管理消息, 均可以携带启用拥塞 控制的 APN及对应的会话管理退避时间。 这些消息有:
激活第二 PDP上下文接受( ACTIVATE SECONDARY PDP CONTEXT ACCEPT )消息; 激活第二 PDP上下文请求( ACTIVATE SECONDARY PDP CONTEXT REQUEST )消 息;
激活第二 PDP上下文拒绝( ACTIVATE SECONDARY PDP CONTEXT REJECT )消息; 请求第二 PDP上下文激活 ( REQUEST SECONDARY PDP CONTEXT ACTIVATION ) 消息;
请求第二 PDP上下文拒绝(REQUEST SECONDARY PDP CONTEXT ACTIVATION REJECT ) 消息;
修改 PDP上下文请求(MODIFY PDP CONTEXT REQUEST ) 消息; 修改 PDP上下文接受 ( MODIFY PDP CONTEXT ACCEPT ) 消息;
修改 PDP上下文拒绝(MODIFY PDP CONTEXT REJECT ) 消息;
去激活 PDP上下文请求( DEACTIVATE PDP CONTEXT REQUEST ) 消息; 去激活 PDP上下文接受 ( DEACTIVATE PDP CONTEXT ACCEPT ) 消息;
会话管理( Session Management, SM )状态 ( STATUS ) 消息。
在上述消息中携带的 APN和会话管理退避定时器,也可以釆用实施例三中提到的 APN 和会话管理退避定时器的编码格式。
依照本发明实施例中, 还提供一种会话管理退避指示的网络侧装置, 如图 3所示, 包 括: 开启拥塞控制 APN确定单元 301 , 用于在需要向 UE发送消息时, 确定所述 UE签约 的接入点名称 APN中开启拥塞控制机制的 APN; 拥塞指示单元 302, 用于向所述 UE发送 消息, 其中携带每一开启拥塞控制机制的 APN对应的会话管理退避时间信息。 所述网络 侧装置具体为通用分组无线业务系统中的 SGSN, 或 EPS系统中的移动性管理实体。
优选地, 所述开启拥塞控制 APN确定单元 301 , 具体用于发送包括所述发生拥塞的 APN组成的 APN列表, 及与所述 APN列表中每个 APN对应的退避时间的消息。 也就是 说, 所述开启拥塞控制 APN确定单元 301向 UE发送的消息中, 包括: 由所述开启拥塞控 制机制的 APN组成的 APN列表; 与所述 APN列表中每个 APN对应的退避时间。
本发明实施例中还提供一种会话管理退避的用户设备, 如图 4所示, 包括: 接收单元 401 , 用于接收网络侧节点发送的消息, 并从中确定包括多个接入点名称 APN的 APN列 表, 以及每个 APN对应的会话管理退避定时器; 定时器启动单元 402, 用于启动所述 APN 列表中每个 APN对应的会话管理退避定时器;会话管理退避单元 403 ,用于对于每个 APN, 在该 APN的会话管理退避定时器超时前, 停止发起针对该 APN的连接请求和会话管理消 息。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种会话管理退避指示方法, 其特征在于, 包括:
网络侧节点在需要向用户设备 UE发送消息时, 确定所述 UE签约的接入点名称 APN 中开启拥塞控制机制的 APN;
所述网络侧节点向所述 UE发送消息,其中携带每一开启拥塞控制机制的 APN对应的 会话管理退避时间信息。
2、 如权利要求 1 所述的方法, 其特征在于, 所述消息包含: 由所述开启拥塞控制机 制的 APN组成的 APN列表; 与所述 APN列表中每个 APN对应的退避时间。
3、 如权利要求 2所述的方法, 其特征在于, 所述 APN列表中每个 APN对应的退避 时间, 釆用通用分组无线业务 GPRS系统定义的定时器的定时时长的格式表示;
所述 APN列表中每个 APN, 釆用 APN对应的编码来表示。
4、 如权利要求 2所述的方法, 其特征在于, 所述 APN列表中每个 APN, 在 UE与该 APN之间的连接已激活时, 釆用该已激活的连接的承载标识来表示该 APN。
5、 如权利要求 1 所述的方法, 其特征在于, 所述网络侧节点发送的消息, 为网络侧 节点当接收到 UE发送的 APN的连接请求时,在该 APN开启拥塞控制机制的情况下向 UE 返回的连接拒绝消息,或在该 APN未开启拥塞控制机制的情况下向 UE返回的激活默认承 载请求消息。
6、如权利要求 5所述的方法,其特征在于,所述网络侧节点为移动性管理实体 MME; 所述网络侧节点接收的 UE发送的 APN的连接请求, 为 UE在附着过程中发送的连接 请求, 或为 UE在附着到网络后发送的连接请求。
7、 如权利要求 5所述的方法, 其特征在于, 所述网络侧节点为服务 GPRS支持节点 SGSN;
网络侧节点接收到的 UE发送的 APN的连接请求,为 UE发送的激活分组数据协议 PDP 上下文请求消息。
8、 如权利要求 1 所述的方法, 其特征在于, 所述网络侧发送的消息, 为网络侧节点 接收到 UE发送的会话管理消息时向所述 UE返回的会话管理响应消息。
9、如权利要求 8所述的方法,其特征在于,所述网络侧节点为移动性管理实体 MME; 所述网络侧节点返回的会话管理响应消息, 为下述任一消息:
激活专用分组演进系统 EPS承载上下文请求消息;
激活缺省 EPS承载上下文请求消息; 承载资源分配拒绝消息;
承载资源修改拒绝消息;
去激活 EPS承载上下文请求消息;
EPS会话管理 ESM状态消息;
修改 EPS承载上下文请求消息;
去连接拒绝消息。
10、 如权利要求 8所述的方法, 其特征在于, 所述网络侧节点, 为服务 GPRS支持节 点 SGSN;
网络侧节点返回的会话管理响应消息, 为如下任一消息:
激活第二分组数据协议 PDP上下文接受消息;
激活第二 PDP上下文请求消息;
激活第二 PDP上下文拒绝消息;
请求第二 PDP上下文激活消息;
请求第二 PDP上下文拒绝消息;
修改 PDP上下文请求消息;
修改 PDP上下文接受消息;
修改 PDP上下文拒绝消息;
去激活 PDP上下文请求消息;
去激活 PDP上下文接受消息;
会话管理 SM状态消息。
11、 一种会话管理退避方法, 其特征在于, 包括:
用户设备 UE接收网络侧节点发送的消息, 并从中确定包括多个接入点名称 APN的 APN列表, 以及每个 APN对应的会话管理退避定时器;
UE启动所述 APN列表中每个 APN对应的会话管理退避定时器;
对于每个 APN, 在该 APN的会话管理退避定时器超时前, 停止发起针对该 APN的连 接请求和会话管理消息。
12、 一种会话管理退避指示的网络侧装置, 其特征在于, 包括:
开启拥塞控制 APN确定单元, 用于在需要向用户设备 UE发送消息时, 确定所述 UE 签约的接入点名称 APN中开启拥塞控制机制的 APN;
拥塞指示单元, 用于向所述 UE发送消息, 其中携带每一开启拥塞控制机制的 APN对 应的会话管理退避时间信息。
13、 如权利要求 12所述的网络侧装置, 其特征在于, 所述开启拥塞控制 APN确定单 元向 UE发送的消息中, 包括: 由所述开启拥塞控制机制的 APN组成的 APN列表; 与所 述 APN列表中每个 APN对应的退避时间。
14、 如权利要求 12或 13所述的网络侧装置, 其特征在于, 所述网络侧装置, 为通用 分组无线业务 GPRS系统中服务 GPRS支持节点 SGSN, 或为演进的分组系统 EPS系统中 的移动性管理实体 MME。
15、 一种会话管理退避的用户设备, 其特征在于, 包括:
接收单元, 用于接收网络侧节点发送的消息, 并从中确定包括多个接入点名称 APN 的 APN列表, 以及所述列表中包含的每个 APN对应的会话管理退避定时器;
定时器启动单元, 用于启动所述 APN列表中每个 APN对应的会话管理退避定时器; 会话管理退避单元, 用于对于所述每个 APN, 在该 APN的会话管理退避定时器超时 前, 停止发起针对该 APN的连接请求和会话管理消息。
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