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Method for realizing LCAS sink deletion member and sink state machine realizing the same

A state machine and member technology, applied in the field of communications, can solve problems such as service damage and inability to ensure no service damage.

Inactive Publication Date: 2006-09-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the time when the source end stops mapping services is different from the time when the sink end stops extracting services, that is, if t Rx less than or greater than t Tx +64ms / 128ms, it will cause damage to the business
while t at each site Rx and t Tx They are all different, so according to the G.7042 sink state machine, there is no guarantee that there will be no damage to the business when the sink first initiates the deletion of members

Method used

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  • Method for realizing LCAS sink deletion member and sink state machine realizing the same
  • Method for realizing LCAS sink deletion member and sink state machine realizing the same
  • Method for realizing LCAS sink deletion member and sink state machine realizing the same

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Embodiment Construction

[0034] The technical solution of the present invention will be described below in conjunction with the accompanying drawings and specific embodiments.

[0035] The main idea of ​​the present invention to realize the method for deleting members of the LCAS sink is to modify the existing state machine of the sink to add a new state, namely the REMOVE state. The REMOVE state is used to indicate that the sink member is waiting for deletion confirmation in this state, and services still need to be extracted from the member to be deleted in this state. In this state, after receiving the corresponding control field CTRL=DNU from the source, the sink member stops extracting services from the member in the next multiframe, and confirms that the deletion is truly successful.

[0036] Please refer to image 3 and Figure 4 , especially see image 3 and Figure 4 In the process part 111 selected in the box, in this embodiment, the negotiation process that the slave end first initiates...

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Abstract

The present invention relates to a deleting member method by LCAS originating from sink source.Said method includes 1, sink transmitting MST=FAIL of member o be deleted and transiting its state into REMOVE, wherein said REMOVE state being sink state machine pre-increased state, to express in said state said sink member waiting delete confirming and still needing extracting service from the member to be deleted, 2, sink received said MST=FAIL, transmitting control field CTRL=DNU, to make said to deleted member state transiting DNU from NORMAL, 3, after sink receiving to be deleted member control field CTRL=DNU, stopping extracting service from said member at next multi-frame, 4, transiting said to be deleted member state into IDLE, which means delete successful.

Description

【Technical field】 [0001] The invention belongs to the technical field of communication, and in particular relates to a method for implementing a link capacity adjustment scheme (LinkCapacity Adjustment Scheme, LCAS) to losslessly delete members from a sink and a sink state machine for realizing the method. 【Background technique】 [0002] The ITU-T G.7042 standard defines the link capacity adjustment method (LCAS). LCAS provides the adaptation function of the source side (Source Side) and the sink side (Sink Side) of the virtual concatenation group (Virtual Concatenation Group, VCG), which can ensure that the service will not be damaged when adding or deleting members, so as to realize Seamless adjustment of bandwidth. [0003] The establishment or deletion of virtual concatenation and the addition or reduction of members are realized by changing the instructions in the status field of the control packet (Control Packet) in the LCAS and VC control frames, and establishing a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04J3/00
CPCH04J3/14H04J3/1611H04L12/28H04L9/40
Inventor 杨洋赵智广
Owner HUAWEI TECH CO LTD