WO2014059829A1 - Procédé et dispositif de traitement de données de trame mac d'ethernet - Google Patents

Procédé et dispositif de traitement de données de trame mac d'ethernet Download PDF

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Publication number
WO2014059829A1
WO2014059829A1 PCT/CN2013/082491 CN2013082491W WO2014059829A1 WO 2014059829 A1 WO2014059829 A1 WO 2014059829A1 CN 2013082491 W CN2013082491 W CN 2013082491W WO 2014059829 A1 WO2014059829 A1 WO 2014059829A1
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Prior art keywords
mac frame
detection
mac
complete
data
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PCT/CN2013/082491
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English (en)
Chinese (zh)
Inventor
朱惠文
陈思思
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中兴通讯股份有限公司
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Publication of WO2014059829A1 publication Critical patent/WO2014059829A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an Ethernet MAC frame data processing method and apparatus.
  • Ethernet MAC frame data processing method and apparatus BACKGROUND OF THE INVENTION Since the beginning of the 21st century, the communications industry has entered a period of rapid development, and broadband Internet has entered all aspects of life, and the requirements for network speed are also increasing. With the release of the IEEE P802.3ba standard, high-speed Ethernet has become the development direction of the current network.
  • current Ethernet data processing technologies have the following disadvantages:
  • Embodiments of the present invention provide an Ethernet MAC frame data processing method and apparatus, which are used to solve the problem that a data transmission rate of a MAC layer processing circuit of an Ethernet device in the prior art is small, and can only support a single service or a fixed service. The problem.
  • An embodiment of the present invention provides a method for processing an Ethernet MAC frame data, including: receiving a MAC frame of a different service type; and dividing, according to a preset length, a received MAC frame of each service type into a plurality of data blocks, where Each data block includes a complete MAC frame or/and a partial MAC frame; in each system cycle, MAC frame data is detected for data blocks corresponding to different service types in a preset order, and the detection result is stored in the corresponding storage. region.
  • An embodiment of the present invention provides an Ethernet MAC frame data processing apparatus, including: a receiving module, configured to receive MAC frames of different service types; and a reconstruction module, configured to receive each service type according to a preset length
  • the MAC frames are respectively divided into a plurality of data blocks, wherein each data block includes a complete MAC frame or/and a partial MAC frame; and the detecting module is configured to, according to a preset sequence, data corresponding to different service types in each system cycle.
  • the block performs MAC frame data detection, and stores the detection result in a corresponding storage area.
  • MAC frames of different types of services received in a system period are respectively divided into data blocks of the same size, and then MAC frames of data blocks corresponding to different service types are performed in a preset sequence in each system cycle.
  • the data is detected, so that the embodiment of the present invention only needs to perform MAC frame data detection on data blocks of the same length, and does not need to separately perform MAC frame data detection on data of different lengths according to the transmission rate of different types of services.
  • the MAC frame of the different types of services with different data transmission rates can be detected through a MAC frame data detection path, so that the embodiment of the present invention can be implemented on the basis of lower hardware configuration, and the processing resource overhead is reduced.
  • 1A is a service distribution of a time slot frame corresponding to a service with a data transmission rate of 100 Gb/s according to an embodiment of the present invention
  • FIG. 1B is a corresponding data transmission rate of 10 Gb/s according to an embodiment of the present invention. And the traffic distribution of the time slot frames of the hybrid service with the data transmission rate of 40 G/S;
  • FIG. 1C is a corresponding data transmission rate of 10 Gb/s and a data transmission rate of 40 G/S in the embodiment of the present invention;
  • Figure 1D shows the service distribution of time slot frames corresponding to 10 mixed services with a data transmission rate of 10 Gb/s in the embodiment of the present invention;
  • FIG. 2 is an embodiment of the present invention; Flowchart of the MAC frame data processing method; and
  • FIG. 3 is a flowchart of a MAC frame data processing apparatus according to an embodiment of the present invention.
  • Embodiments of the present invention provide a method for processing MAC frame data by using time division multiplexing, which divides received MAC frames of different service types into data blocks of the same size, and then, in each system cycle, MAC frame data detection is performed on data blocks corresponding to different service types in a preset order, thereby achieving the purpose of being able to handle multiple types of services of different types and different data transmission rates of hybrid access.
  • the MAC frame data processing method provided by the embodiment of the present invention is as shown in FIG. 2 .
  • Step 201 The receiving end receives MAC frames of different service types.
  • the input interface of the MAC layer receives MAC frames of different service types, and can also receive MAC frames of the same service.
  • the receiving end processes the data into MAC frame data according to the relevant protocol corresponding to the service type of the received data.
  • Step 202 The receiving end divides the received MAC frames of each service type into a plurality of data blocks according to a preset length, where each data block includes a complete MAC frame or/and a partial MAC frame.
  • the CGMII 100Gb/s MEDIA INDEPENDENT INTERFACE, Media Independent Interface
  • the interface transmits or receives 64 bits of data in each external interface cycle, where the start of the MAC frame exists in the 64-bit data block. When the word is controlled, it must be stored in the first word of the data block.
  • the data width of the XGMII (40Gb/s MEDIA INDEPENDENT INTERFACE) interface is 32 bits.
  • the interface transmits or receives 32-bit data every system cycle (this clock is the clock of the external interface, not the system clock), and exists in the 32-bit data block.
  • this clock is the clock of the external interface, not the system clock
  • the preset length of the data block can be determined according to the maximum throughput and data processing amount of the input interface of the MAC layer.
  • the preset length of the data block is 512 bits. It is also possible to determine the preset length of the data block by dividing the data transmission rate of the input interface of the MAC layer by the clock period of the data processing, for example, if the data transmission rate of the received service is 100 Gb/s, and the system is for one data.
  • the clock period for the MAC frame data detection of the block is 200 MHz, and the preset length of the data block is 512 bits. Due to the large length of the MAC frame in the actual situation, the length of the MAC frame may be less than 64 bits, and may also be as long as 10K.
  • any one data block may contain a complete MAC frame or/and a partial MAC frame, for example, one data block contains m complete MAC frames; or one data block contains m complete MAC frames and the last MAC frame contains the start a portion of the control word, wherein a portion of the last MAC frame containing the start control word is a partial MAC frame; or, a data block includes m complete MAC frames and a portion of the first MAC frame including an end control word, where A MAC frame contains the part of the end control word, that is, a partial MAC frame; or, one data block may contain m complete MAC frames, the first MAC frame contains the part of the end control word, and the last MAC frame contains the start a portion of the control word, wherein the first MAC frame includes a portion of the end control word, and the last MAC
  • Step 203 In each system cycle, the receiving end performs MAC frame data detection on the data blocks corresponding to different service types according to a preset sequence, and stores the detection result in the corresponding storage area. According to the maximum throughput weight of the data transmission amount of the MAC frame of each service type in one system period, the number of data blocks of each service type for performing MAC frame data detection in one system period can be respectively determined. Detection order. In practical applications, a data block that needs to perform MAC frame data detection in one system cycle may be defined as one slot frame.
  • the number and order of the data blocks of each service type in each slot frame may be determined according to the maximum throughput weight of the data transmission amount of the MAC frame of each service type received by the MAC layer interface in one system period, that is, The number and order of data blocks of each service type in each slot frame may be determined according to the data transmission rate of the MAC frame of each service type.
  • Each slot frame may be composed of a frame header, a frame tail, and n data blocks, where n is a positive integer, and each data block occupies one slot, that is, each data block occupies one clock cycle for the MAC frame. Data detection.
  • the total time n clock cycles for performing MAC frame data detection for one slot frame is referred to as one system cycle.
  • n 10 (that is, one slot frame contains 10 slots), and each data block occupies one slot.
  • the service distribution in any one slot frame is as shown in FIG. 1A, and each data block occupies one time slot, including MAC frame data of the service of equal length.
  • the data transmission rates of the services are 40 Gb/s and 10 Gb/s, respectively, in each slot frame, each data transmission rate is 40 Gb/s.
  • the service has 4 data blocks, occupying 4 time slots (which can be consecutive or discontinuous four time slots), and each service with a data transmission rate of 10 Gb/s has one data block, occupying one time respectively. Gap.
  • the service distribution combination in the slot frame is more likely, including but not limited to the service distribution of two typical slot frames listed below: Service distribution of a slot frame As shown in FIG. 1B, the data block with the data transmission rate of 40 Gb/s and the data block of the service 2 occupy the time slots 1 to 4 and the time slots 5 to 8, respectively, and the data of the service 3 and the service 4 with the data transmission rate of 10 Gb/ s .
  • the blocks occupy slot 9 and slot 10, respectively.
  • the service distribution of a time slot frame is as shown in FIG. 1C, the data block of the service with a data transmission rate of 40 Gb/s occupies the time slot 1 ⁇ 4, and the data transmission rate is 10 Gb/ s service 2 , service 3 , service 4.
  • the data blocks of Service 5 , Service 6 and Service 7 occupy slots 5 ⁇ 10, respectively.
  • the service distribution in a time slot frame is as shown in FIG. 1D, and there are 10 different services, each service.
  • One data block occupies one time slot each.
  • the amount of data received by the input interface of the MAC layer in one system cycle does not reach the maximum throughput of the input interface.
  • a data block occupies one time slot, and some time slots in the time slot frame may be rounded, that is, MAC frame data detection is not performed on any data block in a clock cycle corresponding to the time slots of these round spaces. For example, if the current system period only receives a MAC frame of a service with a data transmission rate of 10 Gb/s, the MAC frame of the service may be divided into data blocks of a preset length, and only one data block per system cycle.
  • each data block occupies one time slot in one time slot frame, and other time slots in the time slot frame are empty, that is, within one system cycle, only one clock cycle
  • the time is to perform MAC frame data detection on one data block, and the MAC frame data detection operation is not performed in other clock cycles.
  • the embodiment of the present invention divides the MAC frame of each service type into data blocks of a preset length, and always performs MAC frame data detection on the data block having a fixed preset length, so even if it is different
  • the MAC frames of the services with different data transmission rates are received in the time period, and the processing of the MAC frame data can still be performed, thereby supporting the switching of services with different data transmission rates.
  • each data block is detected by using a time division multiplexing manner, and the detection result of each data block is stored in the corresponding storage area according to the service classification, including the following two steps:
  • the MAC frame or the part of the MAC frame performs multiple character detection, and stores the detection result into the corresponding storage area according to the service type of the current data block; if multiple complete MAC frames or multiple partial MAC frames are extracted from the current data block Or, extracting at least one complete MAC frame and at least one partial MAC frame from the current data block, performing multiple character detection on each of the extracted complete MAC frames or/and partial MAC frames, respectively, according to the current
  • the service type of the data block stores the detection results of each complete MAC frame or/and part of the MAC frame into their respective storage areas.
  • one MAC frame includes a portion of the end control word and another MAC frame includes a portion that starts the control word
  • multiple character detections are respectively performed; or, A complete MAC frame and a partial MAC frame are extracted from the current data block, and multiple character detections are respectively performed; or, a complete MAC frame and two partial MAC frames are extracted from the current data block, and multiple characters are respectively performed.
  • the detection result of the complete MAC frame is stored in the corresponding MAC frame data detection result storage address, and the detection result of each part of the MAC frame belonging to the same MAC frame is stored as a complete detection result of the complete MAC frame. Enter the same MAC frame data detection result storage address as the complete detection result of the same MAC frame.
  • a buffer may be configured for each service to record the detection result of the corresponding MAC frame, where a complete MAC frame is divided into multiple partial MAC frames, and each partial MAC frame is located.
  • the detection results of the MAC frames of each part are sequentially stored in the same MAC frame data detection result storage address in the detection process, and the sum of the detection results of the respective partial MAC frames is used as the complete MAC frame.
  • the complete detection result only when the detection result in the storage address of the MAC frame data detection result is a complete detection result, the receiving end parses the complete MAC frame, and outputs the parsed MAC frame and the corresponding complete detection result.
  • performing multiple character detection on a complete MAC frame or/and a partial MAC frame includes: frame interval detection, preamble detection, source address detection, destination address detection, label detection, CRC (Cyclic Redundancy Check, loop) Redundancy check code) detection, frame type detection, and frame length detection.
  • the frame interval is detected by detecting the interval byte between the start control word of the current MAC frame and the end control word of the previous MAC frame, and recording the length of the detected interval byte.
  • the preamble detection is: detecting whether the preamble byte of the current MAC frame is incorrect.
  • the source address is detected as: detecting the source address byte of the current MAC frame, identifying and recording the source address.
  • the destination address is detected as: The destination address byte of each frame is detected, the destination address is identified and recorded, and the destination address type is determined.
  • the tag is detected as: The tag byte of the frame containing the tag is detected, and the tag is identified.
  • the frame length is detected as: Calculate the actual frame length and determine whether the frame long byte is correct.
  • the CRC is detected as: Performing a cyclic redundancy check on the data of the DA byte of the frame to the FCS byte to determine whether the frame has a CRC error.
  • the frame type detection is: detecting the frame type byte and determining the type of the frame.
  • the receiving end stores the detection result belonging to the same MAC frame in the same MAC frame data detection result storage address, Therefore, after the detection result of each partial MAC frame belonging to the same MAC frame is stored in the same MAC frame data detection result storage address, the same MAC frame is parsed according to the stored content in the MAC frame data detection result storage address. After outputting, the stored content in the MAC frame data detection result storage address is output as a complete detection result of the same MAC frame.
  • the processing of the MAC frame in step 204 specifically includes: if the complete detection result of any one MAC frame indicates that the arbitrary one MAC frame passes multiple character detection, according to the complete detection result of the any one MAC frame and the user configuration Transparently transmitting, regenerating, or filtering any MAC frame; if the complete detection result of any one MAC frame indicates that the arbitrary one MAC frame does not pass at least one character detection, according to the complete detection result of the any one MAC frame and the user configuration modification or Discard at least one MAC frame.
  • Transparent transmission means that the input data in the MAC frame is not changed, and is directly output;
  • Modifying refers to changing certain fields of the MAC frame. The value is then output;
  • the regeneration refers to regenerating the fields of the MAC frame to form a new MAC frame output;
  • filtering refers to filtering out the MAC frame that meets the filtering condition according to the detection result of the source address, the destination address, the label, and the frame type.
  • the detection result of the output source address, the destination address, the label, and the frame type has no error MAC frame;
  • the acquisition refers to extracting the MAC frame conforming to the capture condition from the data stream and providing the user with the read according to the user configuration and the complete detection result.
  • Discarding refers to discarding MAC frames that meet the discarding criteria based on user configuration and complete detection results, such as MAC frames containing errors.
  • the following takes the data transmission rate of the Ethernet MAC layer input interface as 100 Gb/s as an example. It describes in detail how to record each data block in the slot frame according to the service distribution in the slot frame in the current system period.
  • the detection result is stored in the corresponding storage area.
  • the detection result of any one of the data blocks in the slot frame and the MAC frame parsed according to the complete detection result may be stored in any one of the slots. In the storage area. If the current slot frame contains a service with a data transmission rate of 40 G/s and a service with a data transmission rate of 10 G/s, the data transmission rate may be any data block corresponding to the service of 40 G/S.
  • the detection result and the MAC frame parsed according to the complete detection result are stored in any one of the storage areas corresponding to the service type, and the detection result of the data block of the service with multiple data transmission rates of 10 G/s is analyzed according to the complete detection result.
  • the subsequent MAC frames are respectively stored in the corresponding storage areas according to the corresponding service types. If the current slot frame includes multiple services with a data transmission rate of 10 Gb/s, the detection result of the time slot corresponding to the service with multiple data transmission rates of 10 G/s and the MAC frame parsed according to the complete detection result are The corresponding service types are respectively stored in the corresponding storage areas. After a time slot frame is processed, if there is a parsed MAC frame, all the parsed MAC frames can be combined into one data output, fed back to the transmitting end, and all the detected detection results are output for the user. Query the performance of the MAC frame transmitted here.
  • an Ethernet MAC frame data processing apparatus is configured as shown in FIG. 3, and includes: a receiving module 301, configured to receive MAC frames of different service types; and a reconstruction module 302, configured The MAC frames of each type of service received are respectively divided into a plurality of data blocks according to a preset length, wherein each data block includes a complete MAC frame or/and a partial MAC frame; and the detecting module 303 is in each system cycle.
  • the MAC frame data is detected in the data block corresponding to the different service types according to the preset sequence, and the detection result is stored in the corresponding storage area; the parsing module 304 is set to exist in the storage area corresponding to the detected data block.
  • the complete detection result of the MAC frame is obtained by parsing the corresponding MAC frame according to the complete detection result of the obtained MAC frame, and outputting the complete detection result of the MAC frame.
  • the storage area corresponding to each type of service may be a memory. Since the device designed by the embodiment of the present invention always performs MAC frame data detection processing on a data block having a preset length, if the service type or data transmission rate of the received MAC frame is changed, the device can still perform data processing on the MAC frame. Therefore, the device designed by the embodiment of the present invention can support MAC frame data processing of different transmission rates and different service types, and can support switching between services of different data transmission rates, thereby saving hardware resources and having a wide application range.
  • the receiving end divides the MAC frames of different types of services received in one system period into data blocks of the same size, and then differently according to a preset sequence in each system cycle.
  • the data block corresponding to the service type performs the MAC frame data detection, so that the embodiment of the present invention only needs to perform MAC frame data detection on the data block of the same length, and does not need to separately perform MAC for different lengths of data according to the transmission rate of different types of services.
  • Frame data detection is
  • the MAC frame of the different types of services having different data transmission rates can be detected through a MAC frame data detection path, so that the embodiment of the present invention can be implemented on the basis of lower hardware configuration, and the processing resource overhead is reduced. Moreover, it can be applied to the case where MAC frames of multiple service types are transmitted in parallel at high speed, and can also handle the case of low-speed transmission of MAC frames of a single service type, and can handle different transmission rates of MAC frames of multiple service types. Therefore, it has good scalability, can meet the ever-increasing data transmission rate requirements and the ever-increasing MAC frame data processing requirements of the service category, and can be applied to various communication devices having Ethernet MAC layer processing requirements. A wide range of applications.
  • the computer program instructions may also be stored in a computer readable storage area operable in a particular manner by a computer or other programmable data processing device such that instructions stored in the computer readable storage area are generated Included is an article of manufacture of an instruction device that implements the functions specified in a block or blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
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Abstract

L'invention porte sur un procédé et un dispositif de traitement de données de trame MAC d'Ethernet. Le procédé consiste à : recevoir différents types de service de trames MAC ; conformément à une longueur préréglée, diviser respectivement chaque type de service de trame MAC en plusieurs blocs de données, chaque bloc de données contenant une trame MAC complète et/ou une trame MAC partielle ; et dans chaque cycle système, effectuer une détection de données de trame MAC sur les blocs de données correspondant à différents types de service conformément à un ordre préréglé, et stocker le résultat de détection dans une zone de stockage correspondante, de manière à résoudre les problèmes selon lesquels un circuit de traitement de couche MAC du dispositif Ethernet courant a un faible débit de transmission, peut seulement prendre en charge un service unique ou un service fixe, mais ne peut pas satisfaire l'exigence de développement du dispositif Ethernet.
PCT/CN2013/082491 2012-10-16 2013-08-28 Procédé et dispositif de traitement de données de trame mac d'ethernet WO2014059829A1 (fr)

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CN201210392271.7A CN103731360B (zh) 2012-10-16 2012-10-16 一种以太网mac帧数据处理方法及装置
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CN109818811B (zh) * 2019-03-25 2020-05-12 电子科技大学 一种识别分配类及混合类mac协议的方法
CN113194046B (zh) * 2021-04-14 2023-04-14 深圳赛动智造科技有限公司 一种监控数据实时获取方法、装置及设备

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CN101192900B (zh) * 2006-12-01 2011-05-11 武汉烽火网络有限责任公司 用于电信级以太网的应用前向纠错机制的通信方法和设备

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WO2009061260A1 (fr) * 2007-11-06 2009-05-14 Telefonaktiebolaget L M Ericsson (Publ) Procédé et agencement dans un système de communication sans fil
CN102428726A (zh) * 2009-05-08 2012-04-25 索尼公司 通信设备和通信方法、以及通信系统

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