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Link state self consulting method

A link state and auto-negotiation technology, applied in data exchange through path configuration, digital transmission systems, electrical components, etc., can solve the problems of high software overhead and low efficiency, achieve less resource consumption, improve efficiency, and solve limitations sexual effect

Inactive Publication Date: 2008-09-03
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The technical problem to be solved by the embodiments of the present invention is to provide a method for auto-negotiation of the link state of data transmission, so as to overcome the problem that in the prior art, the CPU is used to perform software processing on the interruption generated by the link error, the software overhead is large, and the efficiency is low. high problem

Method used

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Embodiment Construction

[0040] Now, specific embodiments according to the present invention will be described with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0041] Figure 5 A schematic diagram showing Link_off 506 and Link_err 504 added in the cell header according to the present invention. As an example, an 8-bit overhead is added to the cell header, and bits 0-5 are sequence number 502 information, which are Serdes numbers bundled with each other. For 10G ports (8 channels in total), only the lower 3 bits are valid, but the serial number will increment from 0 to 63. For example, when LSN[2:0] is 3’b000, Link_off 506 is 1, and Link_err 504 is 0, it means the Serdes sent by the peer 0 has been closed, from the peer SD_TX 0 Data cells are no longer sent over. Link_err 504 is 0, indicating the peer SD_RX 0 No link errors detected...

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Abstract

A link status self negotiation method is used for data transmission link state negotiation between transmitting end and receiving end. It contains receiving end receiving data according to right sequence through querying serial number in cell head; through cell head link gateway bit and line error bit to transfer link status; increasing link status list at receiving end and transmitting end; in link fault occurrence and link recover process through receiving end and transmitting end transmitting / receiving state to control data receiving and transmitting, to complete link self negotiation process. In link status self negotiation process, said invention also complete link self negotiation process through querying and configuring parallel-series / series-parallel convert on off state list. The present invention raises negotiation efficiency and systematical reliability.

Description

technical field [0001] The present invention relates to a link self-negotiation method (mechanism), in particular to an extensible link self-negotiation method which transmits the link state by adding an overhead in a cell. Background technique [0002] With the increasing bandwidth requirements of the network, the interface of the switching network often requires a bandwidth of up to 10G or even 40G. However, there is no such fast serial bus at present. The industry's practice is to combine several 2.5G or 3.125G Serdes ( SERializer / DESerializer, parallel serial / serial parallel converter) bundled to provide a 10G or 40G port, in order to provide a port with a service bandwidth of 10G, eight 2.5G Serdes need to be bundled to support, the bandwidth of 40G is Need 32 2.5G Serdes to support. For a 10G interface, the current general practice is to bundle eight 2.5G Serdes to provide it. [0003] Such as figure 1 as shown, figure 1 The left side of the figure represents the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/28
Inventor 王凯罗柳柱
Owner HUAWEI TECH CO LTD
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