WO2012034330A1

WO2012034330A1 - Method, system and convergence loop apparatus for synchronization between apparatuses in convergence network

Info

Publication number: WO2012034330A1
Application number: PCT/CN2010/079519
Authority: WO
Inventors: 杨元永
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-15
Filing date: 2010-12-07
Publication date: 2012-03-22
Also published as: CN101938318A; CN101938318B

Abstract

A method, a system and a convergence loop for apparatus for synchronization between apparatuses in convergence network are provided in the invention. The method includes that: a port type of a current port is determined by a convergence loop apparatus, wherein the convergence loop apparatus is provided with functions of a boundary clock and a transparent clock, and the port types include a master port, a slave port and a server port, and the server port is the port connected to an access loop; Precision Time Protocol (PTP) messages are processed by the convergence loop apparatus according to the determined port type for realizing synchronization between the apparatuses in the convergence network. With the method and device of the invention, the problem of poor synchronism between the apparatuses in the convergence network is solved, the synchronization operation between the apparatuses in the convergence network is simplified and the performance of the system is improved.

Description

The present invention relates to the field of communications, and in particular to a method, system, and aggregation ring device for synchronizing devices in a converged network. BACKGROUND Currently, there are two types of synchronization between devices in a communication network: One is frequency synchronization, that is, signals at the source end and the destination end maintain a certain relationship in frequency or phase, and frequency synchronization is also generally referred to as clock synchronization. For example, synchronous Ethernet, E1 interface clock synchronization, etc.; another type of synchronization is time synchronization, that is, not only the same frequency, but also the same phase, and the same time count scale. The IEEE (Institute of Electrical and Electronic Engineers) has developed the Precision Time Protocol (PTP or 1588v2) for network measurement and control systems. PTP uses the packet-based method to adjust the time deviation and frequency deviation between the slave clock and the master clock by using the path delay measurement principle to synchronize the time and frequency between the master clock and the slave clock. The basic function of ΡΤΡ is to keep the clocks of each node in the distributed network synchronized with frequency and time within a certain precision. The ΡΤΡ standard provides four basic clock types that can be used for networking between master and slave clocks: Boundary Clock (BC, Boundary Clock), Normal Clock (OC, Ordinary Clock), Transparent Clock (TC, Transparent Clock), Normal Clock + Boundary clock (represented by "OC+TC") means that the device has both the characteristics of a normal clock and the characteristics of a transparent transmission clock). In a distributed network, these four clock types can be mixed to meet the synchronization between devices. In actual networking, the operator sometimes uses a distributed network instead of a distributed network. Instead, the network is planned to be in the form of several access ring networks connected to the aggregation ring network. This networking mode is called convergence. The internet. In order to provide better performance and safer and simpler management, devices in the converged network need to support the following features: 1 : The aggregation ring device is directly synchronized with the grandmaster clock (GM) device, which requires the aggregation ring device to As a boundary clock (slave device), PTP packets can be transparently transmitted to other devices on the ring. 2: The port of the aggregation ring device connected to the access ring device needs to provide the clock time for the access ring device. Therefore, the port is forced to be the master port. This port can block the 1588v2 interaction between the access ring and other devices on the aggregation ring. . None of the above four clock types can well satisfy the above two characteristics, resulting in poor synchronization between devices in the system. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method, system, and aggregation ring device for synchronizing devices in a converged network, so as to at least solve the problem of poor synchronization between devices in the converged network. According to an aspect of the present invention, a method for synchronizing devices in a converged network is provided, including: a convergence ring device determining a port type of a current port; wherein the aggregation ring device is configured with a boundary clock and a transparent clock; The main port, the slave port, and the monthly port are connected to the access ring. The aggregation ring device processes the PTP packet according to the determined port type to enable the device in the aggregation network. Synchronization is achieved. According to another aspect of the present invention, a convergence ring device is provided, including: a port type determining module, configured to determine a port type of a current port; wherein, the aggregation ring device is configured with a boundary clock and a transparent clock; The primary port, the slave port, and the monthly port are connected to the access ring. The packet processing module is configured to process the precise time protocol PTP packet according to the port type determined by the port type determining module. Synchronization between devices in the converged network where the ring device is located. According to still another aspect of the present invention, a converged network system is provided, including: a convergence ring device and an access ring device; the aggregation ring device includes: a port type determining module, configured to determine a port type of the current port; The ring device is configured with a boundary clock and a transparent clock; the port type includes a primary port, a secondary port, and a monthly service port, and the monthly service port is a port connected to the access ring; 4 a message processing module, configured according to the port type Determining the port type determined by the module to process the precise time protocol PTP packet, so that the devices in the aggregation network system are synchronized; the access ring device includes: a synchronization module, configured to process PTP packets according to the port type of the port, and the access ring The clock type of the device is a boundary clock or a transparent clock. The port types of the access ring device include the primary port and the secondary port. Through the invention, the new clock type BC+TC is configured on the aggregation device, and the synchronization operation is performed based on the type, which solves the problem that the synchronization between the devices in the convergence network is poor, and the robustness of the network time synchronization is enhanced. Simplifies the synchronization between devices in a converged network and improves the system. System performance. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a flowchart of a method for synchronizing devices in a converged network according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a collection ring device according to an embodiment of the present invention; FIG. 4 is a block diagram showing the structure of a convergence network device according to an embodiment of the present invention; and FIG. 5 is a structural block diagram of a convergence network system according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The present invention considers the networking characteristics and requirements of the converged network, and introduces a new clock type, that is, a boundary clock + a transparent clock, and the device configured with the clock type has a function of a boundary clock and a transparent clock. Based on this, an embodiment of the present invention provides a method, a system, and a convergence ring device for synchronizing devices in a converged network. FIG. 1 is a flowchart of a method for synchronizing devices in a converged network according to an embodiment of the present invention. The method includes the following steps: Step 4: S42: The aggregation ring device determines a port type of a current port. The aggregation ring device is configured with a boundary clock and a transparent clock (represented by "BC+TC"); the port type includes a primary port (master port), a slave port (slave port), and a service port (server port), The service port is the port connected to the access ring. The aggregation device can determine the current port type and the clock type configured by itself according to the information in the configuration file. Step S104: The aggregation ring device processes the PTP packet according to the determined port type, so that the devices in the convergence network are synchronized. In this embodiment, different types of ports correspond to different processing methods, for example, when the port type determined by the aggregation ring device is a service port, step S104 includes: sending the generated PTP 4 message from the current port, Discard the PTP 4 message received by the current port. Preferably, for the networking feature of the convergence network, before performing the inter-device synchronization, that is, before the step S102, the foregoing method further includes the following configuration:

1) Configure the clock type of the access ring on the access ring as a boundary clock or a transparent clock. The transparent clock is a peer-to-peer (P2P, Peer to Peer) transparent clock or end-to-end (E2E, End to End). According to the configuration, the access ring device processes the PTP packet according to the port type of the port, and the port type of the access ring device includes the primary port and the secondary port;

2) Configure the transmission deviation (TD, Transmission Deviation) of the access ring device to be a normal clock;

3) Configure the clock type of the aggregation ring device that is not connected to the access ring in the aggregation network as the boundary clock. The time source of the convergence ring device that is not connected to the access ring is from a Global Positioning System (GPS), and is used as a GM clock of the convergence network;

4) Configure the clock and port state selection algorithm of the device in the aggregation network as the best master clock (BMC) algorithm; according to the configuration, the aggregation ring device runs the BMC algorithm from the convergence ring device. Select one port as the slave port, at least one port as the master port, and select at least one port from the master port as the service port. The access ring device on the access ring runs the BMC algorithm, and selects one port from the port of the access ring device as the slave port, and the remaining ports are the master ports. The PTP 4 text in this embodiment includes one of the following: Announce 4 Announcement, Synchronization (Sync) 4艮文, 4 流(flow_up) 4艮文, Delay Request (DelayReq) 4艮文And delay response (DelayResp) 4 艮 text. Referring to the internal structure of the aggregation ring device shown in FIG. 2, the device includes a 1588 protocol stack module, a BMC algorithm module, and a packet switching module, where the BMC algorithm module is used to run The BMC algorithm determines the type of each port on the node clock; ΡΤΡ the protocol stack module, which is used to generate and process the 艮 4艮 text; 4 艮 text exchange module, which is used to determine the type and port type of the 艮 , , According to different types #丈 corresponding processing. The performance of each port is as follows: The slave port (Slaffer port;), the received Sync message and the flow_up message need to be transparently transmitted to other primary ports (ie, the master port). And simultaneously sent to the 1588 protocol stack module. For the received DelayReq, the text is only transparently processed. For the received DelayResp 4 message, it needs to be terminated by the destination clock identifier (ClockID) and sent to the 1588 protocol stack module for processing; for the destination ClockID that does not match, the DelayResp 4 message is only transparently processed. The 1588 4 艮 text sent by the 1588 protocol stack module is sent normally. The monthly port (Server port;), all received 1588v2 4 files are terminated on this port (not transparently transmitted, preventing the lower level 1588 4 text from traversing to the upper 1588v2 network), and must be discarded for the received Announce text. The BMC algorithm module is prevented from calculating this port as a Slave port; the received DelayDeq 4 message or other redundant 1588v2 message is processed or discarded by the 1588 protocol stack module. The 4发出 protocol sent by the 1588 protocol stack module is not filtered (including Announce, Sync, Flow_Up, DelayResp). The master port (Master port;) needs to transparently transmit the received Announce 4 file and send it to the 1588 protocol stack module to participate in the BMC algorithm. For the received Sync, Flow_Up, DelayReq, and DelayResp 4, only the transparent transmission processing is required. The Announce 4 message issued by the platform needs to be issued normally. Although the BMC algorithm module calculates that the port is the Master port, the port does not send the Sync message. In this embodiment, by configuring a new clock type BC+TC on the aggregation device and performing synchronization operations based on the type, the problem of poor synchronization between devices in the aggregation network is solved, and the robustness of network time synchronization is enhanced. In addition, the time synchronization of the aggregation ring device will not affect the time synchronization of the aggregation ring device, and the time synchronization between the devices in the aggregation network can be hierarchically processed, that is, only the aggregation ring device can provide the access ring device. time. It simplifies the synchronization between devices in the converged network and improves system performance. Embodiment 1 This embodiment is described by taking the aggregation network shown in FIG. 3 as an example, where devices 1, 2, 3, and 5 are aggregation ring devices, and GE accesses are hanged on devices 3, 4, and 5 Ring One, GE Access ring 2, GE access ring 3, and GE access ring 4. The clocks on the GE access ring are the access ring devices. The clock types configured on the aggregation ring device and the access ring device are the same as those configured in the previous embodiment. That is, the aggregation ring devices 1 and 2 are set as boundaries in Figure 3. Clock function, devices 3, 4, 5 are set to boundary clock + transparent clock function (such as E2E transparent clock). All devices on the access ring are set to boundary clocks. A TD base station is connected to the access ring device, and the TD base station is set to a normal clock. All PTP devices use the one-step clock mode defined by 1588v2.

1. The network shown in Figure 3 is a PTP clock domain, and the JLi or delay measurement mechanism is E2E. In this clock domain, the BMC algorithm is enabled for the boundary clock, the normal clock, the boundary clock + the transparent transmission clock. 2. The time source of the boundary clock of device 1 is from GPS and is the GP clock of the PTP i or . According to the BMC algorithm, the port on the link acts as the master port. This port sends the Announce message and the sync message, and responds to the DelayReq message, which sends the DelayResp message.

3. On the node clock of devices 3, 4, and 5 on the aggregation ring, specify the port connected to the access ring device as the server port. This node clock runs the BMC algorithm and selects one of the ports as the slave port and one port as the master port. For example, for device 4, port2 (port 2) is the slave port, portl (port 1) is the master port, port3 (port 3) and port4 (port 4) are the server ports; then device 4 is synchronized to device 1.

4. The device 4 on the aggregation ring processes the packet according to the type of the port. Take the aggregation ring device shown in Figure 2 as an example. For different port types, each module participates in the following processing: port2: Receive Announce And sync 4 艮 text, sent to the 1588 protocol stack module, and forwarded to the port1 port. Received DelayReq 4 转发 text forwarded to portl. After receiving the DelayResp 4 message, the destination block ID is matched and sent to the 1588 protocol stack module, and the unmatched forwarding is forwarded to portl, and the Announce and DelayReq messages generated by the 1588 ten-layer stack module are sent. Portl : Connect) Announce 艮并 and send 1588 10 to discuss the stack module, and forwarded to port2. After receiving the Sync, DelayReq, and DelayResp 4 messages, it is forwarded to port2. Send the Announce message generated by the 1588 Ten-Stack Module. Port3, port4: Receive the Announce 4 message and discard it. The received DelayReq message or other redundant 1588v2 message is processed or discarded by the 1588 protocol stack module, and the Announce generated by the 1588 10 stack module is sent. Sync, DelayResp 4 艮 text. 5. All devices in the access ring run the BMC algorithm, which determines that one port on the link is a slave port, and the others are master ports. All base stations run the BMC algorithm to determine the port status of the port connected to the access ring device as the slave port. The access ring device is synchronized to the aggregation ring device. The base station synchronizes with the access ring device, and finally reaches the entire network time synchronization. This embodiment provides a new type of clock: boundary clock + transparent clock. And propose a new port type: server port. This port type is based on the master port type in the PTP standard. Some new features are added. For example, the server port has all the received 1588v2 · 3⁄4 texts terminated (not transparently transmitted, preventing the lower level 1588 4 text from traversing to the upper 1588v2 network. The function of the), for the received Announce 4 file discard, prevents the BMC algorithm module from computing this port as a slave port; for the received normal DelayReq 4 text or other redundant 1588v2 4 艮 text by the 1588 protocol stack The module processes or discards. The 4艮 messages (including Announce, Sync, Flow_Up or DelayResp) issued by the 1588 protocol stack module are not filtered. The boundary clock + transparent clock has both the function of a boundary clock and the function of a transparent clock. This clock type can have one slave port and multiple master ports. Multiple master ports can specify one or several of them to be transparent ports, and you can also specify one or several of them as server ports. For example: If the NE is an aggregation ring device, you need to provide clock time to the access ring device. You can manually specify the corresponding port as the server port. When this port participates in the BMC algorithm operation, it is fixed as the master port. Only the Announce 4 message is sent from this port, but the Announce 4 message is not received. The port does not transparently transmit PTP packets from other ports. After running the BMC algorithm, this node clock will select the state of each PTP port. For example, there will be a slave + transparent port, there will be one or more server ports, there will be one or more transparent ports. When a telecom operator deploys a 1588v2 time synchronization network, if it is deployed in the form of a plurality of access rings in an aggregation ring, the clock type provided by the embodiment of the present invention may be applied. This type of application can improve the time synchronization performance of the node clock on the aggregation ring. It can provide time for the access ring device, and can block the mutual connection between the aggregation ring and the access ring device. This method simplifies the complexity of the 1588v2 time synchronization network and improves the management of the 1588v2 time synchronization network. Sexual clock types are interconnected. Referring to FIG. 4, an embodiment of the present invention further provides a convergence ring device, where the device includes: a port type determining module 42 configured to determine a port type of a current port; The aggregation ring device is configured with a boundary clock and a transparent clock. The port type includes a primary port, a secondary port, and a service port, and the service port is a port connected to the access ring. The packet processing module 44 is configured according to the port type. The port type determined by the determining module 42 processes the precise time protocol PTP packet, so that the devices in the convergence network where the aggregation ring device is located are synchronized. The message processing module 44 includes: a message sending unit, configured to: when the type of the current port is a service port, send the generated PTP message from the current port; the message termination unit is configured to determine that the current port type is a service. The port discards the PTP packets received by the current port. The PTP 4 text in this embodiment includes one of the following: Announce 4 Announcement, Synchronization (Sync) 4艮文, 4 流(flow_up) 4艮文, Delay Request (DelayReq) 4艮文And delay response (DelayResp) 4 艮 text. The packet processing module 44 processes the PTP packet according to the port type as follows: The slave port (Slave port;), the received Sync packet and the flow_up packet need to be transparently transmitted to other primary ports (ie, the master port). And simultaneously sent to the 1588 protocol stack module. For the received DelayReq 4 艮 text only transparent processing. For the received DelayResp 4 message, it needs to be terminated by the destination clock identifier (ClockID) and sent to the 1588 protocol stack module for processing; for the destination ClockID that does not match, the DelayResp 4 message is only transparently processed. The 1588 4 艮 text sent by the 1588 protocol stack module is sent normally. The monthly port (Server port;), all received 1588v2 4 files are terminated on this port (not transparently transmitted, preventing the lower level 1588 4 text from traversing to the upper 1588v2 network), and must be discarded for the received Announce text. The BMC algorithm module is prevented from calculating this port as a Slave port; the received DelayDeq 4 message or other redundant 1588v2 message is processed or discarded by the 1588 protocol stack module. The 4发出 protocol sent by the 1588 protocol stack module is not filtered (including Announce, Sync, Flow_Up, DelayResp). The master port (Master port;) needs to transparently transmit the received Announce 4 file and send it to the 1588 protocol stack module to participate in the BMC algorithm. For the received Sync, Flow_Up, DelayReq, DelayResp 4, only the transparent transmission processing is required. The Announce 4 message issued by the platform needs to be issued normally. Although the BMC algorithm module calculates that the port is the Master port, the port does not send the Sync message. Preferably, the convergence ring device includes: an algorithm configuration module, configured to configure its own clock PTP end The port state selection algorithm is the best master clock BMC algorithm; the port type selection module is used to run the BMC algorithm configured by the algorithm configuration module, and one port is selected as a slave port from the port, at least one port is the master port, and the master port Select at least one port in the port as the service port. The description is based on the example that the aggregation ring device is connected to the access ring. When the aggregation ring device in this embodiment is not connected to the access ring, the clock type is the boundary clock. The time source of the convergence ring device that is not connected to the access ring is from the global positioning system GPS, and is used as the GM clock of the converged network. The clock type configured by the aggregation ring device in this embodiment is a boundary clock and a transparent clock, so that the PTP 4 can be processed differently according to the type of the port, and the time for providing time to the access ring is achieved, and the convergence is solved. The problem of poor synchronization between devices in a network improves the robustness of network time synchronization. In addition, the time synchronization of the aggregation ring device will not affect the time synchronization of the aggregation ring device, and the time synchronization between the devices in the aggregation network can be hierarchically processed, that is, only the aggregation ring device can provide the access ring device. time. It simplifies the synchronization between devices in the converged network and improves system performance. Referring to FIG. 5, an embodiment of the present invention further provides a converged network system, where the system includes: an aggregation ring device 50 and an access ring device 60. The aggregation ring device 50 includes: a port type determining module 52, configured to determine a current port. The port type of the aggregation ring device 50 is configured with a boundary clock and a transparent clock; the port type includes a primary port, a secondary port, and a monthly service port, and the monthly service port is a port connected to the access ring; The module 54 is configured to process the PTP packet according to the port type determined by the port type determining module to synchronize the devices in the aggregation network system. The access ring device 60 includes: a synchronization module 62, configured to: The port type of the port handles PTP packets. The clock type of the access ring device 60 is a boundary clock or a transparent clock. The port types of the access ring device include a primary port and a secondary port. The aggregation ring device 50 specifically processes the PTP 4 packet in the same manner as the foregoing embodiment. For example, when the aggregation ring device determines that the port type is a service port, the device sends the generated PTP packet from the port and discards the PTP packet received by the port. Text. Based on this, the message processing module 54 includes: The sending unit is configured to: when the type of the current port is a monthly port, the PTP 4 message is sent from the current port; and the terminating unit is used to determine that the current port type is a monthly port, and is discarded. PTP packet received by the current port. The PTP packet includes one of the following: Announce message, Synchronization (Sync) message, stream 4 (flow_up) 4 message, Delay request (DelayReq) 4 message and delay response (DelayResp) ) 4 艮 text. Preferably, the system further includes: a transmission offset TD base station connected to the access ring device, where the TD base station is configured with a common clock function for synchronizing with the access ring device 60. Preferably, the convergence ring device 50 includes: a first algorithm configuration module, configured to configure its own clock PTP port state selection algorithm as an optimal master clock BMC algorithm; a port type selection module, configured to run a BMC algorithm configured by an algorithm configuration module, Select one port from its own port as the slave port, at least one port as the master port, and select at least one port from the master port as the slave port. Corresponding to the above-mentioned convergence ring device 50, the access ring device 60 includes: a second algorithm configuration module, configured to configure its own clock PTP port state selection algorithm as an optimal master clock BMC algorithm; a second port type selection module, Run the BMC algorithm configured by the algorithm configuration module to select one port from the port as the slave port and the other ports as the master port. The description is based on the example in which the aggregation ring device 50 is connected to the access ring. For the aggregation ring device that is not connected to the access ring, the clock type is configured as a boundary clock. The time source of the convergence ring device that is not connected to the access ring is from the global positioning system GPS, and is used as the GM clock of the converged network. The clock type configured by the aggregation ring device in this embodiment is a boundary clock and a transparent clock, so that the PTP 4 can be processed differently according to the type of the port, and the time for providing time to the access ring is achieved, and the convergence is solved. The problem of poor synchronization between devices in a network improves the robustness of network time synchronization. In addition, the time synchronization of the aggregation ring device will not affect the time synchronization of the aggregation ring device, and the time synchronization between the devices in the aggregation network can be hierarchically processed, that is, only the aggregation ring device can provide the access ring device. time. It simplifies the synchronization between devices in the converged network and improves system performance. As can be seen from the above description, the present invention achieves the following technical effects: Improve the convergence ring Time synchronization performance of the node clock. It can provide time for the access ring device, and can block mutual interference between the aggregation ring and the access ring device. Simplify the complexity of the 1588v2 time synchronization network and improve the simplicity and security of the 1588v2 time synchronization network. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for synchronizing devices between devices in a converged network, comprising:

The aggregation ring device determines the port type of the current port;

The aggregation ring device is configured with a boundary clock and a transparent clock. The port type includes a primary port, a secondary port, and a service port, and the service port is a port connected to the access ring.

The aggregation ring device processes the precise time protocol PTP packet according to the determined port type, so that the devices in the convergence network are synchronized.

The method according to claim 1, wherein when the aggregation ring device determines that the port type is the service port,

The processing of the PTP message by the aggregation ring device according to the determined port type includes: sending the generated PTP message from the current port, and discarding the PTP message received by the current port.

The method according to claim 1, wherein before the determining, by the aggregation ring device, the port type of the current port, the method further includes:

The clock type of the access ring device on the access ring is configured as a boundary clock or a transparent clock, where the transparent clock is a point-to-point P2P transparent clock or an end-to-end E2E transparent clock. The transmission delay of the downlink TD base station is a normal clock.

The method according to claim 3, wherein after the aggregation ring device processes the PTP packet according to the determined port type, the method further includes: the port of the access ring device according to the port thereof The type of the PTP packet is processed, and the port type of the access ring device includes a primary end π and a secondary end π.

The method according to any one of claims 1-4, wherein before the determining, by the aggregation ring device, the port type of the current port, the method further includes:

Configure the clock type of the aggregation ring device that is not connected to the access ring in the aggregation network as the boundary clock.

The method according to claim 5, wherein the time source of the convergence ring device not connected to the access ring is from the global positioning system GPS, and serves as the grandfather GM clock of the converged network.

The method according to any one of claims 1-4, wherein the PTP message comprises one of the following: an announcement Announce 4, a synchronous Sync 4, a 3⁄43⁄4, a 4 flow_up 4 text Delay request DelayReq and delay response DelayResp.

The method according to any one of claims 1-4, wherein, before the aggregation ring device determines the port type of the current port, the method further includes:

Configure the clock of the device in the aggregation network. The PTP port state selection algorithm is the best master clock BMC algorithm.

The aggregation ring device runs the BMC algorithm, and selects one port from the port of the aggregation ring device as a slave port, at least one port is a master port, and selects at least one port from the master port as a service port; The access ring device on the access ring runs the BMC algorithm, and selects one port from the port of the access ring device as a slave port, and the remaining ports are master ports.

An aggregation ring device, comprising: a port type determining module, configured to determine a port type of a current port;

The processing module is configured to process the precise time protocol PTP packet according to the port type determined by the port type determining module, so that devices in the convergence network where the aggregation ring device is located are synchronized.

The aggregation ring device according to claim 9, wherein the message processing module comprises:

a sending unit, configured to send the generated PTP 4 message from the current port when the type of the current port is the monthly port;

The essay terminating unit is configured to discard the PTP packet received by the current port when the type of the current port is the monthly port.

The aggregation ring device according to claim 9 or 10, wherein the convergence ring device comprises:

The algorithm configuration module is configured to configure its own clock. The PTP port state selection algorithm is the best master clock BMC algorithm;

a port type selection module, configured to run the BMC algorithm configured by the algorithm configuration module, select one port from the port as a slave port, at least one port is a master port, and select at least one port from the master port It is the monthly port.

An aggregation network system, comprising: a convergence ring device and an access ring device; the convergence ring device includes:

a port type determining module, configured to determine a port type of the current port, where the aggregation ring device is configured with a boundary clock and a transparent clock; the port type includes a primary port, a secondary port, and a service port, and the service port The port is a port connected to the access ring, and the processing module is configured to process the precise time protocol PTP packet according to the port type determined by the port type determining module, so that the devices in the convergence network system are synchronized. ;

The access ring device includes:

The synchronization module is configured to process the PTP packet according to the port type of the port. The clock type of the access ring device is a boundary clock or a transparent clock, and the port type of the access ring device includes a primary port and a secondary port.

The system according to claim 12, wherein the message processing module comprises: a message sending unit, configured to determine, when the type of the current port is the monthly port, from the current The port sends the generated PTP 4 text;

The system according to claim 12, wherein the system further comprises: a transmission offset TD base station connected to the access ring device, wherein the TD base station is configured with a common clock function, and is configured to The access ring device performs synchronization.