Method for realizing LCAS protocol nondestructive switching

A protocol and page switching technology, which is applied in the field of network communication and can solve problems such as data lossless switching failures

Inactive Publication Date: 2004-12-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This has caused a problem in the cooperation between the master control device asynchronously modifying table items and real-time data frames. Improper handling can easily lead to failure of data lossless switching

Method used

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  • Method for realizing LCAS protocol nondestructive switching
  • Method for realizing LCAS protocol nondestructive switching
  • Method for realizing LCAS protocol nondestructive switching

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Embodiment Construction

[0024] Such as figure 1 As shown in the figure, it is a schematic diagram of the switching workflow of the active and standby pages in the method for realizing the lossless switching of the LCAS protocol of the present invention. Specifically include the following aspects:

[0025] 1. The main and standby table items are realized by a dual-port ram. One port is read-only for reading table entries, and the other port is write-only for table entry configuration. The main and standby pages are distinguished by the highest address bit.

[0026] 2. The configuration of table items (that is, the writing of ram) controls the highest address bit through the main control module to complete the configuration of the standby table items at this time. Different from most of the previous designs, the configuration of the standby table items here does not need to consider the cooperation with the real-time data frame, nor the timing of the configuration, and the main control module can be c...

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Abstract

The invention provides a method for realizing LCAS protocol nondestructive switching, wherein data nondestructive switching of LCAS protocol can be realized without the additional high-level user defined protocols, and an operation mode of main page and standby page is adopted, the equipment works on the main page, and the standby page is for modification by LCAS control frame and mapping table items. The invention solves the problem of cooperation between the LCAS control frame and mapping table items with the data frame.

Description

Technical field: [0001] The invention belongs to the technical field of network communication, and specifically relates to a method of using FPGA (Field Programmable Gate Array) or ASIC (Customized Chip) in transmission services to realize the LCAS (Link Capacity Adjustment Scheme, link bandwidth adjustment scheme) protocol defined A method for data lossless switching. Background technique: [0002] At present, in the transmission virtual concatenation (combining the virtual containers distributed in the STM-N data frame into a logical channel) equipment, the way of mapping entries is mostly used to realize the data forwarding between the virtual container and the logical channel defined by SDH / SONET . Moreover, the smooth modification of the mapping entry at the source (Source) and the sink (Sink) is realized through the LCAS protocol, so that data can be transmitted without loss during the modification process of the entry. [0003] At present, the implementation of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
Inventor 牟景辉樊彧邓晓琳戴未
Owner HUAWEI TECH CO LTD
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