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Method for realizing LCAS protocol nondestructive switching on source end

A protocol and source-side technology, applied in the field of network communication, which can solve the problems of increasing design complexity and consuming software and hardware resources.

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

Examples

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Embodiment Construction

[0019] Such as figure 1 As shown in the figure, it is a schematic diagram of the work flow of switching between active and standby pages in the method for realizing lossless switching of the LCAS protocol at the source end of the present invention. Specifically include the following aspects:

[0020] 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.

[0021] 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 cont...

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PUM

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Abstract

The invention provides a method for realizing LCAS protocol nondestructive switching on a source end, wherein the LCAS control frame and mapping table item all adopt an operation mode of main page and standby page, wherein the main page is for reading by the working module, and the standby page is for modification by the controlling equipment, wherein the controlling equipment changes the LCAS control frames actively, interacts with the far-ends through LCAS protocol, then switches the mapping table items standby page into main page before the coming of the 16 frames adjusted data.

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 of sending LCAS control frames at the source (SOURCE) during lossless handover. Background technique: [0002] At present, the main problem to be solved in the design of the source end of the LCAS protocol is the definite delay relationship between the LCAS control frame and the data frame. At present, the forwarding of the data frame to the virtual container defined by the STM-N is mostly realized by means of a mapping table entry. And according to the LCAS protocol, each LCAS control frame corresponds to the next 16 frames of data. This causes the control device to modify the LCAS control frame and the mapping entry in a time-sequential relationship...

Claims

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Application Information

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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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