WO2009006858A1 - Procédé, système et dispositif d'émission et de réception d'informations - Google Patents

Procédé, système et dispositif d'émission et de réception d'informations Download PDF

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Publication number
WO2009006858A1
WO2009006858A1 PCT/CN2008/071629 CN2008071629W WO2009006858A1 WO 2009006858 A1 WO2009006858 A1 WO 2009006858A1 CN 2008071629 W CN2008071629 W CN 2008071629W WO 2009006858 A1 WO2009006858 A1 WO 2009006858A1
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WO
WIPO (PCT)
Prior art keywords
data
information
gap
receiving
transmission
Prior art date
Application number
PCT/CN2008/071629
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English (en)
Chinese (zh)
Inventor
Chiwu Ding
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009006858A1 publication Critical patent/WO2009006858A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/36—Flow control; Congestion control by determining packet size, e.g. maximum transfer unit [MTU]
    • H04L47/365—Dynamic adaptation of the packet size

Definitions

  • the present invention relates to the field of network communications, and in particular, to a method, system and device for transmitting and receiving information.
  • the PHY (Physical Layer) layer of Ethernet is located between MDI (Media Delated Interface) and Mil (Media Independent Interface), including PCS (Physical Coding Sublayer). , physical coding/decoding sublayer), PMA (Physical Medium Attachment) and PPMD (Physical Me book dium Dependent). PMD is an optional sublayer.
  • the main functions of the PHY layer include encoding the transmitted data and superimposing the encoded signal on the physical line, and recovering the encoded signal from the physical line and decoding it to form the received data; the PHY layer also superimposes the signal on the physical line. Or the process of recovery is managed.
  • Ethernet data is organized and managed in units of frames in the Ethernet MAC (Medium Access Control) layer.
  • the PHY layer needs to MAC layer data through a specific interface.
  • the function is coded and mapped to a specific PHY layer signal.
  • the receiving end receives the encoded signal, the receiving layer restores the MAC layer data and the specific function, so that the receiving end of the MAC layer can correctly identify the MAC frame and perform related control functions.
  • Mapping the data and functions of the MAC layer to the PHY layer is done through the ⁇ interface between the MAC layer and the PHY layer.
  • the signal on the Mil interface indicates whether it is currently data or some control function.
  • the PHY layer also needs to use a specific encoding to convert the signal on the ⁇ interface to a signal suitable for PHYj3 ⁇ 4 processing.
  • IPG Inter-Packet Gap
  • CSMA/CD Carrier Sense Multiple Access with Collision Detection
  • the purpose of the gap is to provide recovery time between packets for physical media and other CSMA/CD sublayers in the same collision domain.
  • the IPG is generated when the MAC layer sends MAC frame data. Normally, after the MAC layer sends a complete MAC frame, it needs to send at least 96 bits of data to send the next MAC frame. This stops sending the MAC address.
  • the time interval of the frame data is called IFG (Inter-Frame Gap) in the MAC layer, and is called IPG in the ⁇ interface and PHY layer.
  • IFG Inter-Frame Gap
  • the XGMII (10 Gigabit Media Independent Interface) interface maps the frame gap of the MAC layer to the PHY layer, and uses the control word type plus Idle encoding.
  • the PHY layer sends the Idle control word through PCS encoding.
  • the peer receives the Idle control word and can revert to the IFG of the MAC layer.
  • the Idle control word is considered to be an IPG at the PHY layer and the XGMII interface during transmission.
  • the PHY layer needs to encode the time when the TX_EN indicates no data transmission into a specific Idle for transmission, and explicitly indicates the peer MAC layer IFG. This time is considered IPG at the ⁇ interface and PHY layer.
  • embodiments of the present invention provide a method, system, and device for transmitting information.
  • the technical solution is as follows:
  • An embodiment of the present invention provides a method for sending information, where the method includes:
  • An embodiment of the present invention further provides a method for receiving information, where the method includes:
  • the information is extracted and the data is restored to a complete media access control frame.
  • the embodiment of the invention further provides a system for transmitting information, the system comprising:
  • a sending device configured to adjust a time and a duration of a packet gap of the data, to obtain a transmission gap; and configured to send information to the receiving end in the transmission gap;
  • a receiving device configured to receive information sent by the sending device.
  • the embodiment of the invention further provides a sending device, where the sending device includes:
  • a packet gap adjustment module configured to adjust a time and a duration of a packet gap of the data, obtain a transmission gap and send;
  • a physical layer sending and receiving module configured to receive a transmission gap sent by the packet gap adjustment module, and in the transmitting Send information by gap.
  • An embodiment of the present invention further provides a receiving device, where the receiving device includes:
  • a physical layer sending and receiving module configured to receive a data stream, extract information, and send the data stream after extracting the information
  • a packet gap adjusting module configured to receive the data stream sent by the physical layer sending and receiving module, and put the data into the data stream Cache, revert to a full media access control frame.
  • the transmission time of the transmission information is obtained by adjusting the time and duration of occurrence of the IPG. Gap, transmitting information in the transmission gap, satisfies the requirement of real-time transmission of PHY layer information; at the same time, by adjusting the length of the IPG, it provides a required time gap for the PHY layer to transmit information of any length.
  • FIG. 1 is a flowchart of a method for transmitting information by a transmitting end according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a method for redistributing an adjusted IPG to frame data of a MAC layer according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a packet gap adjustment module according to Embodiment 1 of the present invention, which is located between a MAC layer and a PHY layer;
  • FIG. 4 is a schematic diagram of a packet gap adjustment module according to Embodiment 1 of the present invention, which is located at a MAC layer;
  • FIG. 5 is a schematic diagram of a packet gap adjustment module according to Embodiment 1 of the present invention, which is located at a PHY layer;
  • FIG. 6 is a schematic diagram of a packet gap adjustment module according to Embodiment 1 of the present invention, which is located in an RS sublayer;
  • Embodiment 7 is a system structural diagram of transmission information provided by Embodiment 2 of the present invention.
  • FIG. 8 is a structural diagram of a transmitting device according to Embodiment 3 of the present invention.
  • Figure 9 is a structural diagram of a receiving device according to Embodiment 4 of the present invention. detailed description
  • the embodiment of the present invention provides a required time slot (bandwidth) for the PHY layer to transmit any type of information without increasing the bandwidth by adjusting the time when the Ethernet PHY layer IPG appears and the length of time that occurs.
  • the information is information that needs to be transmitted to ensure normal operation of the Ethernet, and the information may include additional information; the additional information may include: management and control information, multi-channel alignment information, and the like.
  • the embodiment of the invention provides a method for transmitting information, and a packet gap adjustment module is set between the MAC layer and the PHY layer of the transmitting end and the receiving end, and a buffer is configured for the packet gap adjusting module, and the size of the sending end buffer is generally For the maximum number of bits of information, the buffer size of the receiving end is generally the number of bits of the longest MAC frame data.
  • the cache in this embodiment adopts a first-in, first-out structure, and other structures may be employed depending on the specific situation. Since the information includes additional information, the present embodiment uses additional information as an example to illustrate a method of transmitting information.
  • Step 101 When the PHY layer needs to transmit additional information, request a transmission gap for transmitting additional information to the packet gap adjustment module.
  • the request carries the size of the extra information that needs to be transmitted, and the like.
  • Step 102 When the packet gap adjustment module works normally, it is determined by monitoring whether the PHY layer requests to transmit the transmission gap of the additional information. If yes, go to step 103. Otherwise, go to step 108.
  • Step 103 After receiving the request of the PHY layer, the packet gap adjustment module determines whether the buffer space is sufficient according to the size of the additional information. If yes, go to step 104; otherwise, go to step 107.
  • Step 104 The packet gap adjustment module suspends data transmitted by the MAC layer to the PHY layer, and puts data that needs to be transmitted to the PHY layer by the MAC layer into the buffer.
  • the packet gap adjustment module suspends the data transmitted by the MAC layer to the PHY layer, puts the data to be sent into the buffer, and obtains a transmission gap for transmitting additional information by discarding the current data and the packet gap in the data to be transmitted later.
  • Step 105 The packet gap adjustment module sends a replaceable identifier to the PHY layer.
  • the replaceable identifier refers to a special encoding for the obtained transmission gap to enable the PHY layer to recognize.
  • Step 106 After receiving the replaceable identifier, the PHY layer replaces the replaceable identifier with additional information that needs to be transmitted, and then transmits the additional information to the receiving end.
  • Step 107 Perform an alarm, and then perform step 108.
  • the PHY layer does not detect the replaceable flag after a certain period of time, and the transmission is considered to have failed.
  • the packet gap adjustment module alarms, it still performs the adjustment compensation function, that is, discards the packet gap in the subsequent pending data.
  • Step 108 Determine whether there is data to be sent in the cache. If yes, go to step 109; otherwise, go to step 110.
  • Step 109 Discard the IPG data in the data to be sent, put the remaining data into the cache, and then perform the step. Step 111.
  • the MAC layer continuously sends data to the PHY layer, it first sends the pending data in the buffer, and discards the IPG data in the data sent by the new MAC layer, and puts the remaining data into the cache; if the current time is the MAC layer IFG (no data to be sent at the MAC layer), only the pending data in the buffer is sent.
  • Step 110 Put all current data into the cache, and then go to step 111.
  • Step 111 The data is fetched from the cache and sent to the PHY layer.
  • step 111 data is fetched from the buffer and sent to the PHY layer.
  • the data or IFG currently to be sent may be directly sent to the PHY layer in addition to the transmission gap.
  • Step 112 The PHY layer sends data to the receiving end.
  • the packet gap adjustment module at the receiving end needs to redistribute the IPG adjusted by the transmitting end to the frame data of the MAC layer to ensure an IFG with a minimum transmission time of 96 bits between the frame data.
  • Step 201 After receiving the data stream sent by the sending end, the PHY layer of the receiving end includes the transmitting end.
  • the additional information to be sent by the PHY layer also includes the data to be sent by the sender MAC layer, extracting additional information transmitted by the sender, and setting a replaceable identifier, that is, a special code, for the time gap occupied by the transmission of the additional information.
  • the module identification is adjusted, and then the replaced data stream is sent to the packet gap adjustment module.
  • Step 202 After receiving the data flow, the packet gap adjustment module puts the data into the cache, discards the replaceable identifier, and forms a complete MAC layer data frame.
  • Step 203 Determine whether there is a complete MAC frame in the cache. If yes, go to step 204; otherwise, go to step 206.
  • Step 204 The packet gap adjustment module takes a complete MAC frame from the cache and sends it to the MAC layer.
  • Step 205 After the packet gap adjustment module sends a complete MAC frame, it sends a packet gap of at least 96 bits to the MAC layer. Then, return to step 203.
  • Step 206 The packet gap adjustment module sends a packet gap of at least 96 bits to the MAC layer. Then, return to step 203. Because the sender only adjusts the time of IPG before and after, the IPG time is not reduced, so it can satisfy the 96-bit transmission time IFG between each frame of data.
  • the packet gap adjustment module may be located between the MAC layer and the PHY layer;
  • the packet gap adjustment module may be located at the MAC layer as a sublayer of the MAC layer;
  • the packet gap adjustment module may be located at the PHY layer as a sublayer of the PHY layer;
  • the packet gap adjustment module may be located in an RS (Reconciliation Sublayer) sublayer of the PHY layer as a submodule of the RS sublayer.
  • RS Reconciliation Sublayer
  • an embodiment of the present invention further provides a system for transmitting information, including:
  • the sending device 301 is configured to obtain a transmission gap of the transmission information after adjusting the packet gap, and transmit the information in the transmission gap and transmit the data outside the transmission gap by adjusting the time and duration of the packet gap.
  • the receiving device 302 is configured to receive data sent by the sending device 301, extract information in the data, and restore the data to a complete medium access control frame.
  • an embodiment of the present invention further provides a sending device, including:
  • the medium access control layer sending module 401 is configured to send data in the medium access control layer to the lower layer
  • the packet gap adjusting module 402 is configured to adjust a time and a duration of a packet gap in the data in the medium access control layer sending module 401. Obtaining and transmitting a transmission gap of the transmission information;
  • the physical layer sending and receiving module 403 is configured to receive the transmission gap sent by the packet gap adjustment module 402, and send information to the peer device in the transmission gap.
  • the packet gap adjustment module 402 includes:
  • a buffer unit 4021 configured to cache data sent by the medium access control layer sending module 401;
  • a replaceable identifier generating unit 4022 configured to generate a replaceable identifier
  • the multiplexer 4023 is configured to send data in the buffer unit 4021, the replaceable identifier in the replaceable identifier generating unit 4022, and/or the data sent by the medium access control layer sending module 401;
  • the physical layer transmitting and receiving module 403 includes:
  • the data sending and receiving unit 4031 is configured to receive data sent by the multiplexer 4023, and send the data to the peer device;
  • the information sending unit 4032 is configured to: after receiving the replaceable identifier sent by the multiplexer 4023, replace the replaceable identifier with the information and send the information to the peer device.
  • an embodiment of the present invention further provides a receiving device, including:
  • the physical layer sending and receiving module 501 is configured to receive a data stream sent by the peer device, extract information, and send the data stream after extracting the information;
  • the packet gap adjustment module 502 is configured to receive the data stream sent by the physical layer sending and receiving module 501, and The data is put into the cache, restored to a complete media access control frame, and the recovered data is sent;
  • the medium access control layer receiving module 503 is configured to receive data sent by the packet gap adjustment module 502.
  • the physical layer sending and receiving module 501 includes:
  • the data receiving and processing unit 5011 is configured to receive a data stream sent by the peer device, and extract information from the received data stream.
  • the replacing unit 5012 is configured to replace the information in the data stream received by the data receiving and processing unit 5011 with the replaceable identifier, and send the replaced data stream;
  • the packet gap adjustment module 502 specifically includes:
  • the buffer unit 5021 is configured to cache data in the data stream sent by the replacement unit 5012, and discard the replaceable identifier in the data stream to form a complete medium access control frame and send the data.
  • the packet gap insertion unit 5022 is configured to send a packet gap of at least 96 bits when the buffer unit 5021 sends a complete medium access control frame.
  • a multiplexer 5023 is provided for receiving and transmitting the data in the buffer unit 5021 and/or the packet gap in the packet gap insertion unit 5022.
  • the embodiment of the invention further provides a system for transmitting information, the system comprising:
  • a sending device configured to adjust a time and a duration of a packet gap of the data, to obtain a transmission gap; and configured to send information to the receiving end in the transmission gap;
  • a receiving device configured to receive information sent by the sending device.
  • the embodiment of the invention further provides a sending device, where the sending device includes:
  • a packet gap adjustment module configured to adjust a time and a duration of a packet gap of the data, obtain a transmission gap and send;
  • a physical layer sending and receiving module configured to receive a transmission gap sent by the packet gap adjustment module, and in the transmitting Send information by gap.
  • the embodiment of the invention further provides a sending device, where the sending device includes:
  • a packet gap adjustment module configured to adjust a time and a duration of a packet gap of the data, obtain a transmission gap and send;
  • a physical layer sending and receiving module configured to receive a transmission gap sent by the packet gap adjustment module, and in the transmitting Send information by gap.
  • the packet gap adjustment module includes:
  • a cache unit configured to cache the data
  • a replaceable identifier generating unit configured to generate a replaceable identifier
  • a multiplexer configured to send data in the cache unit and an replaceable identifier generated by the replaceable identifier generating unit.
  • the embodiment of the invention further provides a sending device, where the sending device includes:
  • a packet gap adjustment module configured to adjust a time and a duration of a packet gap of the data, obtain a transmission gap and send;
  • a physical layer sending and receiving module configured to receive a transmission gap sent by the packet gap adjustment module, and in the transmitting Send information by gap.
  • the physical layer sending and receiving module is further configured to send the data at a time other than the transmission gap.
  • An embodiment of the present invention further provides a receiving device, where the receiving device includes:
  • a physical layer sending and receiving module configured to receive a data stream, extract information, and send the data stream after extracting the information
  • a packet gap adjusting module configured to receive the data stream sent by the physical layer sending and receiving module, and put the data into the data stream Cache, revert to a full media access control frame.
  • An embodiment of the present invention further provides a receiving device, where the receiving device includes:
  • a physical layer sending and receiving module configured to receive a data stream, extract information, and send the data stream after extracting the information
  • a packet gap adjusting module configured to receive the data stream sent by the physical layer sending and receiving module, and put the data into the data stream Cache, revert to a full media access control frame.
  • the physical layer sending and receiving module includes:
  • the packet gap adjustment module includes:
  • a buffer unit configured to cache data in the data stream sent by the replacement unit, and discard the replaceable identifier in the data stream to form a complete medium access control frame and send the data.
  • the packet gap insertion unit is configured to send a packet gap of at least 96 bits when the buffer unit sends a complete medium access control frame.
  • the real-time transmission of the PHY layer information is realized by adjusting the time and length of the IPG, and the required time gap can be provided for any type of information.
  • the subsequent occurrence is adjusted.
  • the IPG compensates for the time gap originally used by the PHY layer, achieving better utilization of the IPG.
  • Some of the processes in the above embodiments may be implemented by a combination of hardware and software, and the corresponding software may be stored on a readable storage medium such as a hard disk, a memory or an optical disk of a computer.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé, un système et un dispositif d'émission et de réception d'informations qui appartiennent au domaine des communications réseau. Le procédé d'émission d'informations consiste à ajuster l'instant d'occurrence et la longueur de l'intervalle inter-paquets (IPG) des données de façon à obtenir l'interruption de transmission; transmettre les informations à l'extrémité réceptrice dans l'interruption de transmission. Le procédé de réception d'informations consiste à sur réception du flux de données, extraire les informations; reconstituer les données en trames MAC intégrées. Le système comprend un dispositif d'émission et un dispositif de réception. Le dispositif d'émission comporte un module d'ajustement d'IPG ainsi qu'un module d'émission et de réception de couche PHY. Le dispositif de réception comporte un module d'émission et de réception de couche PHY ainsi qu'un module d'ajustement d'IPG. L'ajustement de l'instant d'occurrence et de la longueur de l'IPG permet de réaliser la transmission en temps réel des informations de couche PHY sans augmenter la largeur de bande du réseau.
PCT/CN2008/071629 2007-07-11 2008-07-11 Procédé, système et dispositif d'émission et de réception d'informations WO2009006858A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2007101306194A CN101345613B (zh) 2007-07-11 2007-07-11 通过包间隙传输额外信息的方法、系统和设备
CN200710130619.4 2007-07-11

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WO2009006858A1 true WO2009006858A1 (fr) 2009-01-15

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CN102088334A (zh) * 2010-12-17 2011-06-08 天津曙光计算机产业有限公司 一种基于fpga的万兆以太网数据接收校验方法
CN111884899B (zh) 2016-07-06 2023-12-08 华为技术有限公司 发送数据的方法和转发设备
CN106506118B (zh) 2016-11-11 2019-05-21 盛科网络（苏州）有限公司 Usxgmii多通道ipg精确补偿的方法及系统
CN106604055B (zh) * 2017-01-06 2019-08-09 广州四三九九信息科技有限公司 基于复杂弱移动网络环境的视频平滑发送直播上行方法
CN111224760B (zh) * 2018-11-26 2022-10-25 中国电信股份有限公司 管理信息传输方法和装置
CN111294085B (zh) * 2020-01-15 2021-06-18 天津融汇微电子技术有限公司 在2D5或5Gbase-T1上使用UTP的实现方法

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