WO2005109757A1 - Procede et dispositif d'envoi du signal de commande de la commande d'acces au support d'un anneau de paquet resilient - Google Patents

Procede et dispositif d'envoi du signal de commande de la commande d'acces au support d'un anneau de paquet resilient Download PDF

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Publication number
WO2005109757A1
WO2005109757A1 PCT/CN2005/000494 CN2005000494W WO2005109757A1 WO 2005109757 A1 WO2005109757 A1 WO 2005109757A1 CN 2005000494 W CN2005000494 W CN 2005000494W WO 2005109757 A1 WO2005109757 A1 WO 2005109757A1
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Prior art keywords
rpr
data frame
control signal
mac control
module
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PCT/CN2005/000494
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English (en)
French (fr)
Inventor
Xiang Ge
Fan Zhang
Shaohua Wang
Pengju Liu
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to DE602005023992T priority Critical patent/DE602005023992D1/de
Priority to AT05743393T priority patent/ATE484130T1/de
Priority to EP05743393A priority patent/EP1758306B1/en
Publication of WO2005109757A1 publication Critical patent/WO2005109757A1/zh
Priority to US11/526,531 priority patent/US7920465B2/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42Loop networks

Definitions

  • the present invention relates to the technical field of Resilient Packet Ring (RPR) network communication, and in particular, to a control signal transmission method and device for RPR Medium Access Control (MAC).
  • RPR Resilient Packet Ring
  • MAC Medium Access Control
  • the RPR ring network is an emerging metropolitan area network (MAN).
  • Figure 1 is a schematic diagram of the RPR ring network structure. As shown in Figure 1, the RPR ring network is an interconnected dual ring network that can support a maximum of 255 nodes connected, from node SO to node S254.
  • the outer ring of the RPR ring network is called ringlet O, and the inner ring is called ringlet 1; the part between the two nodes is the span; each connection between the two nodes ⁇ is links; the node S4 to the node S254 S254 congestion caused by the common data traffic between them is called congestion or (congestion domain).
  • FIG 2 shows the hierarchical model of the RPR ring network.
  • RPR is mainly concerned with the data link layer in the Open System Interconnection (OSI) reference model.
  • MAC control and MAC datapath in the data link are referred to as the RPR Medium Access Control (RPR MAC) layer, and the MAC client is referred to as the RPR Client (RPR Client).
  • RPR MAC RPR Medium Access Control
  • RPR Client RPR Client
  • the RPR service supports multiple levels of services, such as level A (ClassA), level B (ClassB), and level C (ClassC).
  • the communication system needs to perform flow control on RPR services sent from the RPR Client to the RPR. MAC according to the priority.
  • the specific control method is as follows: When the RPR Client needs to send ClassA data frames, if the RPR MAC agrees that the RPR Client sends ClassA data, According to the frame, the indication signal sendA for transmitting the ClassA frame is transmitted to the RPR Client. After receiving the indication signal, the RPR Client transmits the data frame of Class A to the RPR MAC. Similarly, when the RPR Client needs to send ClassB and ClassC data frames, the RPR Client interface must send the corresponding indication signals sendB and sendC before sending.
  • sendA / B / C signal is a control signal of RPR MAC.
  • sendA is a 1-bit wide signal, which only indicates whether Class A frames are allowed to be sent.
  • SendB is also a 1-bit wide signal, which only indicates whether to allow Class B frames to be sent.
  • SendC is an 8-bit wide bus signal, which indicates the hop count indication from the local node to the traffic congestion node in the RPR ring network. According to the hop count indication of sendC, the RPR Client interface can stop sending frames to the congested node and continue to send frames to the congested node, so that the effective bandwidth of the ring network can be fully utilized.
  • the functions of RPR Client and RPR MAC are usually implemented by different physical entities.
  • the RPR Client is generally implemented by a network processor, and the network 'processor generally provides only standard interfaces, such as a synchronous optical network (SONET, synchronous optical network) bearer packet (POS, packet over SONET) interface, and a system packet interface (SPI, system packet interface), Gigabit Media Independent (GMII) interface, etc .;
  • RPR MAC is generally implemented by a Field Programmable Gate Array (FPGA) or Application Specific Integrated Circuit (ASIC).
  • FPGA Field Programmable Gate Array
  • ASIC Application Specific Integrated Circuit
  • the standard interface on the RPR Client side is not specifically designed for RPR, and 10 signal lines are not specifically designed for RPR to connect sendA / B / C. Therefore, the RPR client cannot directly process the sendA and sendB> sendC signals transmitted by the RPR MAC.
  • the signal line similar to the sendA / B / C signal function is the transmission polling packet effective indication (PTPA) signal line. There is only one PTPA signal line in the standard SPI3 interface, and sendA / B / There are 10 signals in C. Obviously, the sendA / B / C signal cannot be directly transmitted to the RPR client through the SPI3 interface. give away.
  • the existing solution is to add an FPGA circuit to the standard interface of the RPR Client. See Figure 3. Inside the FPGA, according to the RPR Client and RPR MAC control signals The line condition edits the gate array, so that the RPR MAC control signal is converted into a signal form that can be obtained by the RPR Client standard interface. For example: When the standard interface of the RPR Client is the SPB interface, multiple channels are set in the FPGA, respectively. 'Two of the channels are connected to the sendA and sendB signal lines of the RPR MAC, respectively, and are used to receive the sendA and sendB signals, respectively, with binary status The value indicates the transition state of the sendA and sendB signals.
  • the channels of the FPGA correspond to the data queues of different priorities of the RPR client.
  • the RPR client obtains sendA / B / C through the query method of the standard interface.
  • When a queue is to be sent it sends an inquiry request with the channel number to the FPGA to ask whether the queue corresponding to the channel can be sent.
  • the FPGA sends the Channel number. Send the signal transition status on this channel. In this way, the conversion of 10 signals to '1 signal is completed, so that the sendA, sendB, and sendC signals can be transmitted to the RPR Client through the FPGA.
  • an object of the present invention is to provide an RPR MAC control signal transmission method and device, so as to realize that the RPR MAC control signal is directly transmitted to a receiver through a standard interface, thereby reducing the hardware cost of the communication system and reducing Unstable factors affecting signal transmission.
  • the technical solution of the present invention is:
  • An elastic packet ring (RPR) medium access control (MAC) control signal transmission method includes:
  • the sender encapsulates the control signal of the RPR MAC into an RPR data frame of a predetermined format, and makes the RPR data frame include a specific identifier for identifying that the RPR data frame carries
  • the sender transmits the encapsulated RPR data frame to the receiver
  • the receiver receives the RPR data frame, determines that the RPR data frame has the specific identifier, and parses out the RPR MAC control signal from the RPR data frame.
  • the method further includes:
  • the sender detects the status of the RPR MAC control signal in real time
  • step A Determine whether the RPR MAC control signal has transitioned, and if so, perform step A; otherwise, return to step.
  • step b when it is detected that the RPR MAC control signal transitions, the method further includes:
  • step eight It is determined whether the RPR MAC control signal transition is detected again within a predetermined time, and if yes, return to step a; otherwise, perform step eight.
  • Counting the predetermined time by using a counter includes: when a jump of the RPR MAC control signal is detected, the counter is reset and starts counting, and when the counter counts to a predetermined time, step 8 is performed.
  • the specific identifier is marked in a time-to-live field of the RPR data frame of the predetermined format.
  • control signal of the RPR MAC is encapsulated in a data field of the RPR data.frame in the predetermined format.
  • the sender transmits the encapsulated RPR data frame to the receiver through a standard interface. Recipient.
  • the receiver is a client of RPR.
  • the sender transmits the RPR data frame carrying the RPR MAC control signal to the receiver by using a high-priority scheduling transmission method.
  • the high-priority scheduling transmission mode is:
  • the high-priority transmission channel between the sender and the receiver is used to transmit the RPR data frame carrying the RPR MAC control signal.
  • the above RPR MAC control signal is: an RPR service priority indication signal.
  • the RPR service priority indication signal includes: an indication signal of permission to transmit a class A data frame, an indication signal of permission to transmit a class B data frame, and an indication signal of permission to transmit a class C data frame.
  • a transmission device for transmitting an RPR MAC control signal includes:
  • Encapsulation module It is used to encapsulate the RPR MAC control signal into an RPR data frame of a predetermined format. A specific identifier is added to the RPR data frame to identify that the RPR MAC control signal is encapsulated in the RPR data frame.
  • the RPR data frame is transmitted to a transmission module; the transmission module is configured to transmit the encapsulated RPR data frame to a receiving module; the receiving module is configured to receive the RPR data frame, and learn the RPR data frame according to the specific identifier;
  • the RPR MAC control signal is carried, and the RPR MAC control signal is parsed from the RPR data frame.
  • the packaging module includes:
  • a transition detection sub-module configured to detect a transition state of the RPR MAC control signal, and send an encapsulation command to the encapsulation sub-module when a transition of the RPR MAC control signal is detected;
  • An encapsulation submodule configured to receive an encapsulation command and calculate a check code according to the RPR MAC control signal, and encapsulate the specific identifier, the RPR MAC control signal, and the check code into an RPR data frame of a predetermined format, The encapsulated RPR data frame is transmitted to the transmission module.
  • the transition detection sub-module and the packaging sub-module further include a counting sub-module for resetting and starting counting when a packaging command is received, and when the count value reaches a predetermined value, the received packaging is The command is transmitted to the packaging sub-module.
  • the transmission module is a synchronous fiber network bearer packet interface system packet interface, or a gigabit medium-independent interface.
  • the present invention encapsulates the control signal of the RPR MAC into an RPR data frame of a predetermined format, and the standard interface can directly transmit the RPR data frame, the control signal to be transmitted of the RPR MAC is thus
  • the RPR service priority indication signal can be transmitted directly to a receiver such as an RPR client through a standard interface, which reduces the hardware cost of the communication system and reduces the instability factors that affect the signal transmission.
  • the present invention enables the RPR MAC signal to be obtained in time by adopting state transition detection; by setting a transition counter to remove the jitter signal in the actual circuit, so that the RPR service priority indication signal can be accurately obtained to avoid jitter interference;
  • the invention also enables the RPR service priority indication signal to be transmitted in time by adopting a high-priority scheduling transmission method; by setting a specific identifier and a check code for indicating that the RPR MAC control signal is carried, the receiver can detect the specific identifier
  • the sum check code enables the receiver to accurately receive the control signal of the RPR MAC; thereby further improving the reliability of signal transmission.
  • Figure 2 is a schematic diagram of the RPR ring network hierarchy model
  • Figure 3 shows the transmission of control signals between an RPR MAC and an RPR client in the prior art.
  • FIG. 4 is a flowchart of a method for transmitting an RPR MAC control signal according to the present invention
  • FIG. 5 is a schematic diagram of a transmission device for transmitting an RPR MAC control signal according to the present invention. Mode for Carrying Out the Invention The present invention is described in detail below with reference to the drawings.
  • the core idea of the present invention is: encapsulate the control signal to be transmitted of the RPR MAC into an RPR data frame of a predetermined format, and directly transmit the control signal to a receiver through a standard interface, and then the receiver parses the control signal.
  • the present invention encapsulates the control signal to be transmitted of the RPR MAC into an RPR data frame of a predetermined format, because the RPR data frame can directly pass data of the standard interface
  • the control signal to be transmitted of the RPR MAC can be transmitted only through a standard interface.
  • the RPR client parses the control signals and processes them accordingly.
  • FIG. 4 is a flowchart of a method for transmitting an RPR MAC control signal according to the present invention. As shown in Figure 4, the process includes:
  • Step 401 The sender, that is, the RPR MAC, encapsulates the RPR MAC control signal into a predetermined RPR data frame.
  • the control signal may be encapsulated in a fixed position in the RPR data frame, and the RPR data frame may be encapsulated in the RPR data frame. It includes a specific identifier for identifying that the RPR data frame carries a control signal.
  • the method may further include: the sender detects the RPR MAC control in real time. If the signal transition occurs, if yes, go to step 401; otherwise, continue to detect the Whether the control signal transitions.
  • step 401 is performed.
  • Step 402 The sender directly transmits the encapsulated RPR data frame to the receiver through a data line of a standard interface.
  • Steps 403 to 405 After receiving the RPR data frame, the receiver determines whether the specific identifier is included in the RPR data frame, and if so, parses the control signal from a fixed position in the RPR data frame; otherwise, Processes as normal RPR data frames.
  • the receiver in the present invention may also be another physical entity, and the RPR MAC control signal is not limited to the RPR service priority indication signal.
  • the RPR data frame in the predetermined format includes: a specific identifier used to indicate that the data frame carries an RPR service priority indication signal, an RPR service priority indication signal, and a check code.
  • the specific identifier is an RPR service priority indication signal identifier in this embodiment, which is used to indicate that the RPR data frame of the predetermined format carries an RPR service priority indication signal, and a check code is used to check the RPR service priority. Indicates if the signal is transmitting incorrectly during transmission.
  • the format of the RPR data frame carrying the RPR service priority indication signal is shown in Table 1 below:
  • the RPR data frame set by the present invention in a predetermined format includes 4 bytes. Since the RPR data frame normally transmitted by the standard interface between the RPR MAC and the RPR client generally includes a 1-byte time-to-live (TTL) field, and the content in the TTL field cannot be all 0s, the embodiment is to make the transmission
  • the data frame of the RPR service priority indication signal is different from other commonly transmitted RPR data frames.
  • the RPR data frame is an RPR data frame of a predetermined format for transmitting the RPR service priority indication signal, that is, the RPR service.
  • the priority indication signal is identified as a TTL field of all 0s, and the TTL field occupies the first byte of the RPR data frame.
  • the present invention may also define other fields to indicate the identity of the RPR priority indication signal.
  • the second byte includes a ring number indication (RI), a fairness control bit (FE), a frame type indication (FT), a service level (SC), and RPR priority indication signals sendA and sendB.
  • RI ring number indication
  • FE fairness control bit
  • FT frame type indication
  • SC service level
  • RPR priority indication signals sendA and sendB the values of RI, FE, FT, and SC are the same as those of the existing RPR data frame, where RI is a bit, when RI is 0, it means outer ring ringlet0, when RI is 1, it means inner ring ringlet 1, 1 bit, fixed to 1; FT is 2 bits, fixed to 00; SC is 2 bits, fixed to 10.
  • the order of the 7th to 0th bits in this byte is RI, FE, FT, SC, sendA, and sendB signals.
  • the second byte is ⁇ , where: when X is 1, it means the data frame sent from the inner loop, when X is 0, the table Shows the data frame sent from the outer ring.
  • the third byte is the sendC signal.
  • the value of the 8 bits in this byte indicates the transition status of the 8 bits in the sendC signal.
  • the positions occupied by the sendA, sendB and sendC signals are the data fields of the RPR data frame.
  • the fourth byte is the check code of the first three bytes.
  • the check code can be an 8-bit cyclic redundancy check code CRC8, and the cyclic redundancy check code CRC8 can pass the check polynomial X 8 + X 7 + X 4 + X 3 + X + 1 obtained.
  • step 401 when an RPR service priority indication signal to be transmitted is detected, it can be encapsulated into the RPR data frame of the predetermined format.
  • the specific encapsulation process is: First, calculate and determine the check code according to the RPR service priority indication signal after the transition, and then identify the RPR service priority indication signal identifier, ring number indication, FE, FT, SC, and RPR after the transition.
  • the service priority indication signal and the calculation-determined check code are encapsulated into an RPR data frame according to the predetermined format in Table 1 above.
  • the RPR MAC After the RPR data frame is encapsulated into a predetermined format, a new RPR data frame transmission request is generated, and the RPR MAC transmits a corresponding RPR data frame to the RPR client through a standard interface according to the request signal.
  • the method for detecting the priority indication signal of the RPR service may use a transition detection.
  • a change in a total of 10 signals of sendA, sendB, and sendC is detected. Once any one of the 10 signal lines The transition of the signal on the signal line indicates that the transitioned sendA, sendB, and sendC signals need to be encapsulated into corresponding RPR data frames.
  • this embodiment adopts the following method: when any signal on the 10-bit signal line of sendA and sendB> sendC is detected as a transition Time, if no one on the 10-bit signal line of sendA, sendB ⁇ sendC is detected again within a predetermined interval ' If the number is changed, the sendA, sendB, and sendC signals after the change are encapsulated into corresponding RPR data frames.
  • the above predetermined interval can be realized by a jump counter.
  • the jump counter is reset and starts counting.
  • the sendA sendB and sendC signals after the transition need to be encapsulated into corresponding RPR data frames.
  • the jump counter is reset and restarts counting, which effectively prevents jitter caused by the signals of sendA, sendB, and sendC. RPR data frames are frequently generated.
  • the predetermined interval can be configured according to the actual needs of the communication system.
  • the counter implements the debounce function, it will cause sendA and sendB sendC to delay the predetermined interval before generating RPR data frames in a predetermined format.
  • the delay caused by the debounce of the hopping counter to process the time frame of the data frame carrying the RPR service priority indication signal Will bring adverse effects.
  • the RPR MAC uses a high-priority scheduled transmission method to transmit the RPR data frame in a predetermined format Direct transmission via standard interface.
  • the high-priority scheduling transmission method includes: scheduling a high-priority transmission channel between a sender and a receiver to transmit the RPR data frame of the predetermined format; or increasing the priority of the RPR data frame of the predetermined format to be transmitted level.
  • the multi-channel mode of the SPI3 / 4 interface can be used to map the data frame of the RPR service priority indication signal to the scheduling priority over the transmission channel scheduling of the normally transmitted RPR data frame.
  • a high-level transmission channel ensures low-latency transmission of the RPR data frame carrying the RPR service priority indication signal.
  • the standard interface is a GI / XGMII interface
  • the priority of the RPR data frame carrying the RPR service priority indication signal can be increased to make it have a higher priority than the RPR data frame that is usually transmitted.
  • the GMII / XGMII interface adopts the whole frame transmission mode, it can only be transmitted after the RPR data frame currently being transmitted is transmitted.
  • the RPR client receives the RP data. After the frame, if the first 8 bits of the data frame are 0000-0000, it indicates that the data frame carries the RPR service priority indication signal.
  • the RPR data frame the RPR client checks the data frame with a check code, and obtains the RPR service priority indication signal from the successfully verified RPR data frame, that is, sendA is obtained from 1 bit of the second byte, Get sendB from 0 bit in the second byte and sendC from the third byte. '
  • FIG. 5 is a schematic diagram of a transmission device for transmitting RPR MAC control signals disclosed in the present invention.
  • the transmission device for transmitting RPR MAC control signals includes: a packaging module 500, a transmission module 510, and a receiving module 520. among them:
  • the encapsulation module 500 is configured to encapsulate an RPR MAC control signal into an RPR data frame of a predetermined format shown in Table 1.
  • a specific identifier is added to the RPR data frame to identify that the RPR MAC control signal is encapsulated in the RPR data frame.
  • the TTL field is identified as all zeros, and the encapsulated RPR data frame is transmitted to the transmission module 510.
  • the control signal is an RPR service priority indication signal.
  • the packaging module 500 further includes: a transition detection sub-module 501, a counting sub-module 502, and a packaging sub-module 503. among them:
  • the transition detection sub-module 501 is configured to detect the RPR service priority indication signal, and once a transition of the control signal is detected, an encapsulation command is sent to the encapsulation sub-module;
  • the counting sub-module 502 is an optional module. The purpose is to prevent RPR data frames from being frequently generated due to the jitter of the control signal. Therefore, the counting sub-module 502 may also be called a de-jitter module. It is configured to start counting once the package command of the transition detection sub-module 501 is received, and when the count value reaches a predetermined count value, transmit the received package command to the package sub-module 503. When there is no counting sub-module 502 in the packaging module 500, the packaging command of the transition detection sub-module 501 is directly transmitted to the packaging sub-module 503.
  • the encapsulation submodule 503 After receiving the encapsulation command, the encapsulation submodule 503 calculates and determines the check code according to the RPR service priority indication signal after the transition, and converts the 8-bit all 0 TTL field, the ring number indication, 'FE, FT, SC, and transition The subsequent RPR service priority indication signal and the calculated check code are encapsulated into an RPR data frame in the format described in Table 1. The encapsulated RPR data frame is transmitted to the transmission module 510.
  • the transmission module 510 After receiving the RPR data frame carrying the PR service priority indication signal transmitted by the encapsulation submodule 503, the transmission module 510 directly transmits the RPR data frame to the receiving module 520 through the data line of the standard interface using a high-priority scheduling transmission method.
  • the specific transmission method is related to the interface of the transmission module. For example, when using the SPI3 / 4 interface, a transmission channel with a higher scheduling priority is used to transmit the RPR data frame of the predetermined format; using the GMII / XGMII interface ⁇ , increasing the predetermined format The priority of the RPR data frame.
  • the RPR data frame carrying the RPR service priority indication signal can also be scheduled for transmission according to the characteristics of the POS interface.
  • the receiving module 520 receives an RPR data frame of a predetermined format transmitted by the transmission module 510, and learns that the RPR data frame carries an RPR MAC control signal according to the specific identifier, that is, if the first 8 bits in the data frame are 0000-0000, Then, the check code in the data frame is checked, and the RPR service priority indication signal is obtained from the successfully checked data frame, that is, sendA is obtained from 1 bit of the second byte, and 0 from the second byte. Bits get sendB and getC from the third byte.

Description

弹性分組环媒质接入控制的控制信号传输方法及装置
技术领域
本发明涉及弹性分组环(RPR, Resilient Packet Ring )网络通 技术 领域,具体涉及一种 RPR媒质接入控制( MAC, Medium Access Control ) 的控制信号传输方法和装置。 发明背景
RPR环网是一种新兴的城域网(MAN )。 图 1为 RPR环网结构示意 图。如图 1所示, RPR环网是一种互相连接的双环网,最多可以支持 255 个节点相连,分别为节点 SO至节点 S254。RPR环网的外环称为 ringlet O, 内环称为 ringlet 1; 两个节点之间的部分为跨度( span ); 两个节 Λ之间 的每一个连接为 links; 节点 S4到节点 S254之间的共同数据流量造成 S254拥塞, 称为拥塞或 ( congestion domain )„
图 2为 RPR环网的层次模型示意图。 如附图 2所示, RPR主要关注的 是开放系统互连(OSI )参考模型中的数据链路 ( data link )层中. MAC 控制子层(MAC control )和 MAC数据路径子层(MAC datapath )与上 层 MAC客户端 ( MAC client ) 的通讯。 通常 data link中的 MAC control和 MAC datapath简称为 RPR媒质接入控制 ( RPR MAC )层, MAC client称 为 RPR客户端 (RPR Client ) 。
RPR业务支持多种等级的服务,如等级 A( ClassA )、等级 B( ClassB )、 等级 C ( ClassC ) 。 通讯系统需要根据优先级对从 RPR Client发送到 RPR. MAC的 RPR业务进行流量控制。 具体的控制方法为: 当 RPR Client需要 发送 ClassA的数据帧时, 如果 RPR MAC同意 RPR Client发送 ClassA的数 据帧,则将准许发送 ClassA类帧的指示信号 sendA传输至 RPR Client, RPR Client接收到该指示信号后, 将 Class A的数据帧传输至 RPR MAC。 同理, 当 RPR Client需要发送 ClassB、 ClassC类的数据帧时, RPR Client接口必 须在接收到相应的指示信号 sendB、 sendC后才可以发送。
上述 sendA/B/C信号为 RPR MAC的控制信号, 其中 sendA是 1比特位 宽的信号, 仅表示是否准许发送 ClassA类帧; sendB也是 1比特位宽的信 号, 仅表示是否准许发送 ClassB类帧; 而 sendC则是 8比特位宽的总线信 号, 表示 RPR环网中本节点到流量拥塞节点的跳数指示。 RPR Client接 口根据 sendC的跳数指示, 就可以停止发送帧到拥塞节点以远, 而继续 发送帧到拥塞节点以近, 这样就可以充分利用环网的有效带宽。 - 在实际的通讯系统中, 通常 RPR Client和 RPR MAC的功能是由不同 的物理实体来实现的。 例如 RPR Client—般由网络处理器实现, 而网络' 处理器一般只提供标准接口,如同步光纤网( SONET, synchronous optical network )承载包(POS, packet over SONET )接口、 系统包接口 ( SPI, system packet interface ) 、 千兆位介质无关( GMII )接口等; RPR MAC 一般由现场可编程门阵列 (FPGA ) 或专用集成电路(ASIC ) 实现。 ■ sendA/B/C信号是 RPR MAC特有的, 在 RPR MAC侧, 1根信号线传输 sendA, 1根信号线传输 sendB, 8根信号线传输 sendC,因此传输 sendA/B/C 共用 10根信号线。
然而, RPR Client侧的标准接口不是为 RPR专门设计的, 没有为 RPR 特意设计 10根信号线来连接 sendA/B/C。 因此 RPR Client侧无法直接处理 RPR MAC传输来的 sendA、 sendB > sendC信号。 例如, 标准的 SPI3接口 中, 与 sendA/B/C信号功能类似的信号线是传输轮询包有效指示( PTPA ) 信号线, 标准 SPI3接口中的 PTPA信号线只有一根, 而 sendA/B/C共有 10 个信号, 显然, 没法直接通过 SPI3接口把 sendA/B/C信号向 RPR client传 送。
为了使 RPR Client同 RPR MAC能够进行控制信号的传输, 现有的解' 决方案是在 RPR Client的标准接口中增加一个 FPGA电路, 参见图 3, 在 FPGA内部, 根据 RPR Client与 RPR MAC控制信号线的状况编辑门阵列, 使 RPR MAC控制信号转化为 RPR Client标准接口可获取的信号形式。 例 如: RPR Client标准接口为 SPB接口时,在 FPGA中,分别设置多个通道,' 其中两个通道分别与 RPR MAC的 sendA和 sendB信号线连接, 分别用于 接收 sendA和 sendB信号, 用二进制状态取值来表示 sendA和 sendB信号的 跳变状态, 另外有 256个通道, 通过 FPGA内部阵列与 sendC信号线相连, 分别表示 sendC信号的 256个跳变取值。 FPGA的通道与 RPR client的不同 优先級的数据队列对应。 RPR client通过标准接口的询问方式获取 sendA/B/C,在某队列要发送时,就向 FPGA发送携带通道号的询问请求, 询问该通道对应的队列是否可以发送, FPGA根据 RPR client送来的通道 号, 将该通道上信号的跳变状态发送出去。 这样, 就完成了 10个信号到' 1个信号的转换, 从而能够将 sendA、 sendB, sendC信号通过 FPGA传输 至 RPR Client,
但是,上述解决方案中 , RPR MAC与 RPR Client之间进行 RPR MAC 控制信号传输时, 必须在标准接口中增加 FPGA芯片来实现, 这明显增 加了整个通讯系统的硬件成本, 而且增加了影响信号传输的不稳定因 素。 发明内容 有鉴于此, 本发明的目的在于, 提供一种 RPR MAC控制信号传输 方法和装置,实现 RPR MAC控制信号直接通过标准接口传输至接收方, 降^氐了通讯系统的硬件成本, 减少了影响信号传输的不稳定因素。 为达到上述目的, 本发明的技术方案为:
一种弹性分组环 RPR媒质接入控制 MAC的控制信号传输方法, 包 括:
A、 发送方将 RPR MAC的控制信号封装到预定格式的 RPR数据帧 中, 并让该 RPR数据帧包括一特定标识, 用于标识该 RPR数据帧携带有
RPR MAC控制信号;
B、 发送方将所述封装好的 RPR数据帧传输至接收方;
C、 接收方接收到 RPR数据帧, 判断出该 RPR数据帧中有所述的特 定标识, 从该 RPR数据帧中解析出所述 RPR MAC控制信号。
优选地, 步骤 A之前, 进一步包括:
a、 发送方实时检测 RPR MAC控制信号的状态;
b、判断所述 RPR MAC控制信号是否发生跳变, 如果是, 则执行步 骤 A; 否则, 返回步骤 。
所述步驟 b中, 当检测到所述 RPR MAC控制信号发生跳变时, 进 一步包括:
判断在预定时间内是否再次检测到所述 RPR MAC控制信号发生跳 变, 如果是, 则返回步骤 a; 否则, 执行步骤八。
利用计数器对所述预定时间进行计时, 包括: 在检测到所述 RPR MAC控制信号发生跳变时, 计数器复位并开始计数, 在计数器的计数. 值达到预定时间时, 执行步骤八。
优选地,所述特定标识在所述预定格式 RPR数据帧的生存时 1 域中 标记。
优选地,所述 RPR MAC的控制信号封装在所述预定格式 RPR数据 . 帧的数据字段中。
优选地,所述发送方通过标准接口将封装好的 RPR数据帧传输至接 收方。
优选地, 所述的接收方为 RPR的客户端。
优选地, 在步骤 B中, 所述发送方采用高优先级的调度传输方式传 输携带有 RPR MAC控制信号的 RPR数据帧至接收方。
优选地, 所述高优先级的调度传输方式为:
用发送方和接收方之间的高优先级传输通道传输所述携带有 RPR MAC控制信号的 RPR数据帧。
所述高优先级的调度传输方式为:
调高所述携带有 RPR MAC控制信号的 RPR数据帧的传输优先级。 上述 RPR MAC控制信号为: RPR业务优先级指示信号。
所述 RPR业务优先级指示信号包括: 准许发送等级 A类数据帧的 指示信号、准许发送等级 B类数据帧的指示信号、 准许发送等级 C类数 据帧的指示信号。
一种传输 RPR MAC控制信号的传输装置, 该装置包括:
封装模块:用于将 RPR MAC控制信号封装到预定格式的 RPR数据 帧中, 在该 RPR数据帧中加特定标识, 用于标识该 RPR数据帧中封装 有 RPR MAC控制信号 , 并将封装好的 RPR数据帧传输至传输模块; 传输模块: 用于将所述封装好的 RPR数据帧传输到接收模块; 接收模块: 用于接收所述 RPR数据帧, 根据所述特定标识获知该 RPR数据帧中携带 RPR MAC控制信号 ,从该 RPR数据帧中解析出所述 RPR MAC控制信号。
优选地, 所述封装模块包括:
跳变检测子模块: 用于检测所述 RPR MAC控制信号的跳变状态, 在检测到 RPR MAC控制信号发生跳变时, 向所述封装子模块发送封装 命令; 封装子模块: 用于接收封装命令, 并根据所述 RPR MAC控^信号 计算校验码, 将所述特定标识、 RPR MAC控制信号和所述校验码封装 到预定格式的 RPR数据帧中,将封装好的 RPR数据帧传输至传输模块。
所述封装模块中, 跳变检测子模块与封装子模块之间进一步包括计 数子模块, 用于在接收到封装命令时, 复位并开始计数, 当计数值达到 预定值时, 将接收到的封装命令传输至所述封装子模块。
优选地, 所述传输模块为同步光纤网承载包接口 系统包接口、 或 千兆位介质无关接口。
通过上述技术方案的描述可明显得知, 由于本发明将 RPR MAC的 控制信号封装到预定格式的 RPR数据帧中, 而标准接口可以直接传输 RPR数据帧 ,因此使 RPR MAC的待传输控制信号如 RPR业务优先级指 示信号可直接通过标准接口传输至接收方如 RPR客户端,降低了通讯系 统的硬件成本, 减少了影响信号传输的不稳定因素。 另外, 本发明通过 采用状态跳变检测使 RPR MAC的信号能够被及时获得; 通过设置跳变 计数器来去除实际电路中的抖动信号,使 RPR业务优先级指示信号能够 被准确获得, 避免抖动干扰; 本发明还通过采用高优先级的调度传输方 式使 RPR业务优先级指示信号能够被及时传输;通过设置用于表示携带 RPR MAC控制信号的特定标识和校验码、 接收方可通过检测该特定标 识和校验码, 使接收方能够准确接收 RPR MAC的控制信号; 从而进一 步提高了信号传输的可靠性。 附图简要说明 图 1是 RPR环网结构示意图;
图 2是 RPR环网层次模型示意图; '
图 3是现有技术的 RPR MAC与 RPR客户端之间进行控制信号传输的 示意图;
图 4是本发明所述 RPR MAC控制信号的传输方法流程图;
图 5是本发明所述传输 RPR MAC控制信号的传输装置示意图。 实施本发明的方式 下面结合附图对本发明进行详细描述。
本发明的核心思想是:将 RPR MAC的待传输的控制信号封装到预定 格式的 RPR数据帧中, 并将其通过标准接口直接传输至接收方, 接收方 再将所述控制信号解析出来。
下面基于本发明的核心思想对本发明提供的技术方案做进一步的 描述。
为了使 RPR MAC和接收方之间仅通过标准接口进行控制信号的传 输,本发明将 RPR MAC的待传输控制信号封装到预定格式的 RPR数据帧 中, 由于 RPR数据帧可以直接通过标准接口的数据线进行传输, 所以, RPR MAC的待传输控制信号就可以仅通过标准接口进行传输。 在 RPR 客户端, 收到携带控制信号的数据帧后, 将控制信号解析出来, 并根据. 这些信号做相应处理。
图 4是本发明所述 RPR MAC控制信号的传输方法的流程图。 如图 4 所示, 该流程包括:
步骤 401、发送方, 即 RPR MAC, 将 RPR MAC控制信号封装到预定. 格式的 RPR数据帧中, 所述控制信号可以封装在该 RPR数据帧中的固定 位置上, 并让该 RPR数据帧中包括一特定标识, 用于标识该 RPR数据帧 携带有控制信号。
在此步骤 401前, 还可进一步包括: 发送方实时检测 RPR MAC控. 制信号是否发生跳变, 如果是, 则执行步骤 401; 否则, 继续检测所述 控制信号是否跳变。
为了防止控制信号的抖动干扰, 当发送方检测到所述 PR MAC控 制信号发生跳变时, 还进一步判断在预定间隔内是否再次检测到所述控 制信号发生跳变, 如果是, 则继续检测所述控制信号是否跳变; 否则, 执行步驟 401。
步骤 402、发送方将所述封装的 RPR数据帧通过标准接口的数据线直 接传输至接收方。
步驟 403 ~ 405、 接收方接收到 RPR数据帧后, 判断该 RPR数据帧中 是否有所述的特定标识, 如果有, 则从该 RPR数据帧中的固定位置解析 出所述控制信号; 否则, 按照正常的 RPR数据帧进行处理。
在以下实施例中, 以接收方为 RPR客户端、 RPR MAC控制信号为 RPR业务优先级指示信号为例,对本发明提供的技术方案进行详细说明。 但是, 本发明所述的接收方也可以是其他物理实体, 所述的 RPR MAC 控制信号也不限于 RPR业务优先级指示信号。
本实施例中, 所述预定格式的 RPR数据帧包括: 用于表示数据帧携 带 RPR业务优先级指示信号的特定标识、 RPR业务优先级指示信号和校 验码。 其中, 所述特定标识在本实施例中为 RPR业务优先级指示信号标 识, 用于表示该预定格式的 RPR数据帧中携带有 RPR业务优先级指示信 号, 校验码用于检验 RPR业务优先级指示信号在传输过程中是否 现传 输错误。
本实施例中, 所述携带 RPR业务优先级指示信号的 RPR数据帧的格. 式如下表 1所示:
Figure imgf000011_0001
如表 1所述, 本发明设定预定格式的 RPR数据帧包括 4个字节。 由于 RPR MAC和 RPR客户端之间的标准接口通常传输的 RPR数据帧一般包 括 1个字节的生存时间 ( TTL )域, 而且 TTL域中的内容不可能为全 0, 因此实施例为使传输 RPR业务优先级指示信号的数据帧区别于其他通常 传输的 RPR数据帧, 确定 TTL域为全 0时, 该 RPR数据帧为传输 RPR业务 优先级指示信号的预定格式的 RPR数据帧, 即 RPR业务优先级指示信号 标识为全 0的 TTL域, 且 TTL域占所述 RPR数据帧的第一个字节。 本发明 也可另外定义其他的字段表示 RPR优先级指示信号的标识。
第二个字节包括环号指示(RI )、 公平适用控制位(FE ) 、 帧类型 指示(FT )、 业务等级(SC ) 、 RPR优先级指示信号 sendA和 sendB。 其 中, RI、 FE、 FT、 SC的取值与现有 RPR数据帧相同, 其中 RI为 1个比特 位, 当 RI为 0时表示外环 ringlet0、 RI为 1时表示内环 ringlet 1; FE为 1个比 特位, 固定为 1; FT为 2个比特位, 固定为 00; SC为 2个比特位, 固定为 10。 sendA为 1个比特位; sendB为 1个比特位, 这两个比特位的取值分别 表示 sendA和 sendB信号的跳变状态。 该字节中从第 7比特位到第 0比特位 的排列顺序依次为 RI、 FE、 FT、 SC、 sendA和 sendB信号。 如该第二字 节为 χΟΟΟΙΟ, 其中: 当 X为 1时, 表示从内环发送的数据帧, 当 X为 0时表 示从外环发送的数据帧。
第三个字节为 sendC信号。 该字节中的 8个比特位的取值分别表示 sendC信号中 8个比特位的跳变状态。 sendA、 sendB信号和 sendC信号所 占的位置为 RPR数据帧的数据字段。
第四个字节为前三个字节的校验码, 该校验码可以为 8位循环冗余 校验码 CRC8,且该循环冗余校验码 CRC8可通过校验多项式 X8 + X7 + X4 + X3 + X + 1获得。
确定了预定格式的 RPR数据帧后,在步骤 401中, 当检测到有待传 输的 RPR业务优先级指示信号时, 即可将其封装到预定格式的 RPR数 据帧中。封装的具体过程为: 首先根据跳变后的 RPR业务优先级指示信 号计算并确定校验码,然后将 RPR业务优先级指示信号标识、环号指示、 FE、 FT、 SC、 跳变后的 RPR业务优先级指示信号和所述计算确定的校 验码按照上述表 1预定的格式封装为 RPR数据帧。
封装为预定格式的 RPR数据帧后,产生新的 RPR数据帧发送请求, RPR MAC根据该请求信号将相应的 RPR数据帧通过标准接口传输至 RPR客户端。
在本发明中, 检测 RPR业务优先级指示信号的方法可采用跳变检' 测, 本实施例中即检测 sendA、 sendB和 sendC共 10位信号的变化, 一 旦 10根信号线中的任意一根信号线上的信号发生跳变就说明需要将跳 变后的 sendA、 sendB和 sendC信号封装为相应的 RPR数据帧。
由于在实际电路中信号会发生抖动, sendA、 sendB、 sendC信号也 ' 同样存在抖动现象。 因此, 为防止因 sendA、 sendB > sendC信号发生抖 动而频繁的产生 RPR数据帧,本实施例釆用如下方法:当检测到 sendA、 sendB > sendC的 10位信号线上的任一信号发生跳变时, 如果在预定间 隔内没有再次检测到 sendA、 sendB ^ sendC的 10位信号线上的任一信' 号发生跳变, 则将跳变后的 sendA、 sendB和 sendC信号封装到相应的 RPR数据帧中。
上述预定间隔可通过跳变计数器来实现,如当检测到 sendA、 sendB sendC的 10位信号线上的任一信号发生跳变时,跳变计数器复位并开始 计数, 当该跳变计数器的计数值达到预定计数值时, 才需要将跳变后的 sendA sendB和 sendC信号封装到相应的 RPR数据帧中。 跳变计数器 在计数过程中, 如果 sendA、 sendB, sendC的 10位信号线上的任一信 号又发生跳变,跳变计数器复位并重新开始计数,有效防止了因 sendA、 sendB, sendC信号发生抖动而频繁地产生 RPR数据帧。
预定间隔可以根据通讯系统的实际需要进行配置, 预定间隔、 跳变. 计数器在实现去抖功能的同时, 会使 sendA、 sendB sendC延迟预定间 隔才可以生成预定格式的 RPR数据帧。 但是, 由于 RPR客户端对 RPR 业务优先级指示信号的响应只能在帧间隔进行, 所以跳变计数器因去抖 而产生的延迟对携带 RPR业务优先级指示信号的数据帧处理的及时性. 不会带来不良影响。
在所述步骤 402的传输过程中,本发明为保证所述封装 RPR业务优 先级指示信号的 RPR数据帧能够得到及时的传输, RPR MAC采用高优 先级的调度传输方式将预定格式的 RPR数据帧通过标准接口直接传输. 至接收方。 高优先级的调度传输方式包括: 调度发送方和接收方之间高 优先级的传输通道传输所述预定格式的 RPR数据帧; 或者,调高所述需 传输的预定格式的 RPR数据帧的优先级。
具体的, 如果标准接口为 SPI3/4接口, 可利用 SPI3/4接口的多通道 模式, 将 RPR业务优先级指示信号的数据帧映射到调度优先级比通常传 输的 RPR数据帧的传输通道调度优先级高的传输通道, 这样就保证了携 带 RPR业务优先级指示信号的 RPR数据帧的传送低延时。 如果标准接口为 G I/XGMII接口 , 可将携带 RPR业务优先级指示 信号的 RPR数据帧的优先级调高, 使其具有比通常传输的 RPR数据帧更 高的优先级。 但是, 由于 GMII/XGMII接口是采用整帧传送模式, 因此 必须等当前正在传输的 RPR数据帧发送完成后才可以传输。
基于上述说明, 本领域的普通技术人员可在其他标准接口例如 POS 接口中, 依据该标准接口的传输特点, 直接实现优先调度传输携带 RPR 业务优先级指示信号的 RPR数据帧 , 本实施例中不再详细说明。
本实施例在上述的步骤 403 ~ 405中, RPR客户端接收到 RP 数据 . 帧后, 如果该数据帧的前 8比特位为 0000—0000, 则表示该数据帧是携 带 RPR业务优先级指示信号的 RPR数据帧 , RPR客户端对该数据帧进 行校验码的校验, 并从校验成功的 RPR数据帧中获取 RPR业务优先级 指示信号, 即从第二字节的 1 位获取 sendA, 从第二字节的 0位获取 sendB, 从第三字节获取 sendC。 '
图 5是本发明公开的传输 RPR MAC控制信号的传输装置示意图, 如图 5所示, 传输 RPR MAC控制信号传输装置包括: 封装模块 500、 传输模块 510、 接收模块 520。 其中:
封装模块 500用于将 RPR MAC控制信号封装到表 1所示预定格式 的 RPR数据帧中, 在该 RPR数据帧中加特定标识, 用于标识该 RPR数 据帧中封装有 RPR MAC控制信号, 例如将 TTL域标识为全零, 将封装 好的 RPR数据帧传输到传输模块 510。 作为一个实施例, 所述控制信号 · 为 RPR业务优先级指示信号。
封装模块 500进一步包括: 跳变检测子模块 501、 计数子模块 502 和封装子模块 503。 其中:
跳变检测子模块 501用于检测所述 RPR业务优先级指示信号,一旦' 检测到控制信号发生跳变, 则向所述封装子模块发送封装命令; 计数子模块 502是一个可选模块, 目的是为了防止由于控制信号的 抖动而频繁产生 RPR数据帧, 因此也可称为去抖模块。用于一旦接收到 跳变检测子模块 501的封装命令, 则开始计数, 当计数值达到预定计数 值时,将接收到的封装命令传输至所述封装子模块 503。 当封装模块 500 中没有计数子模块 502时, 跳变检测子模块 501的封装命令直接传输给 封装子模块 503。
封装子模块 503接收到封装命令后 ,根据跳变后的 RPR业务优先级 指示信号计算并确定校验码, 将 8位全 0的 TTL域、 环号指示、 ' FE、 FT、 SC、 跳变后的 RPR业务优先级指示信号和计算确定的校验码封装 为表 1所述格式的 RPR数据帧, 将封装好的 RPR数据帧传输至传输模 块 510。
传输模块 510接收到封装子模块 503传输来的携带 PR业务优先级 指示信号的 RPR数据帧后, 采用高优先级的调度传输方式将该 RPR数 据帧通过标准接口的数据线直接传输至接收模块 520ο 具体的传输方式 与传输模块的接口相关, 例如: 采用 SPI3/4接口时, 调度优先级高的传 输通道传输所述预定格式的 RPR数据帧;采用 GMII/XGMII接口^,调 高所述预定格式的 RPR数据帧的优先级。 采用 POS接口时, 也可根据 POS接口的特点优先调度传输携带 RPR业务优先级指示信号的 RPR数 据帧。
接收模块 520接收传输模块 510传输来的预定格式的 RPR数据帧, 根 据所述特定标识获知该 RPR数据帧中携带 RPR MAC控制信号,即如果该 数据帧中的前 8比特位为 0000— 0000, 则对该数据帧中的校验码进行校 验, 并从校验成功的数据帧中获取 RPR业务优先级指示信号, 即从第二 字节的 1位获取 sendA, 从第二字节的 0位获取 sendB , 从第三字节获取 sendC。 虽然通过实施例描绘了本发明, 本领域普通技术人员知道, 本发明 有许多变形和变化而不脱离本发明的精神, 希望所附的权利要求包括这 些变形和变化。
以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范围 并不局限于此, 任何熟悉该技术的人在本发明所揭露的技术范围内, 可 轻易想到的变化或替换 , 都应涵盖在本发明的保护范围之内。

Claims

权利要求书
1、一种弹性分组环 RPR媒质接入控制 MAC的控制信号传输方法, 其特征在于包括:
A、 发送方将 RPR MAC的控制信号封装到预定格式的 RPR数据帧 中, 并让该 RPR数据帧包括一特定标识, 用于标识该 RPR数据帧携带有
RPR MAC控制信号;
B、 发送方将所述封装好的 RPR数据帧传输至接收方;
C、接收方接收到 RPR数据帧,判断出该 RPR数据帧中有所述的特定 标识, 从该 RPR数据帧中解析出所述 RPR MAC控制信号。
2、 如权利要求 1所述的方法, 其特征在于, 步骤 A之前, 进一步 包括:
a、 发送方实时检测 RPRMAC控制信号的状态;
b、 判断所述 RPR MAC控制信号是否发生跳变, 如果是, 则执行步 驟 A; 否则, 返回步骤&。
3、 如权利要求 2所述的方法, 其特征在于, 所述步骤 b中, 当检 测到所述 RPRMAC控制信号发生跳变时, 进一步包括:
判断在预定时间内是否再次检测到所述 RPR MAC控制信号发生跳 变, 如果是, 则返回步骤 a; 否则, 执行步骤八。
4、 如权利要求 3 所述的方法, 其特征在于, 利用计数器对所述预 定时间进行计时, 包括: 在检测到所述 RPR MAC控制信号发生跳变时, 计数器复位并开始计数, 在计数器的计数值达到预定时间时, 执行步骤 A。
5、 如权利要求 1 所述的方法, 其特征在于, 所述特定标识在所述 预定格式 RPR数据帧的生存时间域中标记。
6、如权利要求 1所述的方法, 其特征在于, 所述 RPR MAC的控制 信号封装在所述预定格式 RPR数据帧的数据字段中。
7、 如权利要求 1 所述的方法, 其特征在于, 所述发送方通过标准. 接口将封装好的 RPR数据帧传输至接收方。
8、 如权利要求 1所述的方法, 其特征在于, 所述的接收方为. RPR 的客户端。
9、 如权利要求 1所述的方法, 其特征在于, 在步骤 B中, 所述发 送方采用高优先级的调度传输方式传输携带有 RPR MAC 控制信号的 RPR数据帧至接收方。
10、 如权利要求 9所述的方法, 其特征在于, 所述高优先级的调度 传输方式为:
用发送方和接收方之间的高优先级传输通道传输所述携带有 RPR MAC控制信号的 RPR数据帧。
11、 如权利要求 9所述的方法, 其特征在于, 所述高优先级的调度 传输方式为:
调高所述携带有 RPR MAC控制信号的 RPR数据帧的传输优先级。
12、如权利要求 1至 11任一项所述的方法,其特征在于,所述 RPR MAC控制信号为: RPR业务优先级指示信号。
13、 如权利要求 12所述的方法, 其特征在于, 所述 RPR业务优先 级指示信号包括: 准许发送等级 A类数据帧的指示信号、 准许发送等级
B类数据帧的指示信号、 准许发送等级 C类数据帧的指示信号。 ·
14、 一种传输 RPR MAC控制信号的传输装置, 其特征在于所述装 置包括:
封装模块:用于将 RPR MAC控制信号封装到预定格式的 RPR数据 帧中, 在该 RPR数据帧中加特定标识, 用于标识该 RPR数据帧中封装 有 RPR MAC控制信号, 并将封装好的 RPR数据帧传输至传输模块; 传输模块: 用于将所述封装好的 RPR数据帧传输到接收模块; 接收模块: 用于接收所述 RPR数据帧, 根据所述特定标识获知该
RPR数据帧中携带 RPR MAC控制信号,从该 RPR数据帧中解析出所述 RPR MAC控制信号。
15、 如权利要求 14所述的传输装置, 其特征在于, 所述封装模块 包括:
跳变检测子模块: 用于检测所述 RPR MAC控制信号的跳变状态, 在检测到 RPR MAC控制信号发生跳变时, 向所述封装子模块发送封装 命令;
封装子模块: 用于接收封装命令, 并根据所述 RPR MAC控制信号 计算校验码, 将所述特定标识、 RPR MAC控制信号和所述校验码封装 到预定格式的 RPR数据帧中,将封装好的 RPR数据帧传输至传输模块。
16、 如权利要求 15 所述的传输装置, 其特征在于, 所述封装模块 中, 跳变检测子模块与封装子模块之间进一步包括计数子模块, 用于在 接收到封装命令时, 复位并开始计数, 当计数值达到预定值时, 将接收 到的封装命令传输至所述封装子模块。
17、 如权利要求 14所述的传输装置, 其特征在于, 所述传输模块 为同步光纤网承载包接口、 系统^接口、 或千兆位介质无关接口。
PCT/CN2005/000494 2004-05-10 2005-04-13 Procede et dispositif d'envoi du signal de commande de la commande d'acces au support d'un anneau de paquet resilient WO2005109757A1 (fr)

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ATE484130T1 (de) 2010-10-15
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