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Method for realizing LCAS protocol nondestructive switching on host end

A protocol and sink technology, applied in the field of network communication, can solve the problems of consuming hardware and software resources and increasing design complexity

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

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Problems solved by technology

This doubles the complexity of the design and consumes a lot of hardware and software resources

Method used

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  • Method for realizing LCAS protocol nondestructive switching on host end
  • Method for realizing LCAS protocol nondestructive switching on host end
  • Method for realizing LCAS protocol nondestructive switching on host end

Examples

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Embodiment Construction

[0024] like figure 1 As shown in the figure, it is a schematic diagram of the working flow of switching between active and standby pages in the method for realizing lossless switching of LCAS protocol at the sink end according to 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 ...

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Abstract

The invention provides a method for realizing LCAS protocol nondestructive switching on host end, wherein the mapping sheet adopts two items, i.e. a main item and a standby item, the main item acts as the working page for reading by the working module, the standby item acts as the alternative page for modification by the master control module and accomplishes standby items configuration, the standby page is switched into a main page at the frame margin of the LCAS complex frame, and the original main page is switched into alternative page.

Description

Technical field: [0001] The invention belongs to the technical field of network communication, and in particular relates to realizing LCAS protocol (Link Capacity Adjustment Scheme, link bandwidth adjustment scheme) data in SDH / SONET transmission service with FPGA (Field Programmable Gate Array) or ASIC (custom chip) A method for sending LCAS control frames at the sink (SINK) during lossless handover. Background technique: [0002] At present, the main problems to be solved in the design of the sink end of the LCAS protocol are the delay relationship between the LCAS control frame and the data frame and the need to modify the SDH / SONET data frame and logical channel in the next 16 frames of data when doing LCAS pruning or DNU corresponding relationship. [0003] At present, the forwarding from the virtual container defined by the STM-N to the logical channel is mostly realized by means of a mapping table entry. [0004] Due to the above reasons, high requirements are put f...

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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