Chain circuit heat backup method and system

Abstract

The invention relates to a link hot backup method and system in the technical field of communication. The method mainly includes: firstly, at the source end, an identifier is set for the data frame in the data stream, the data stream is transmitted, and the status of the identifier is adjusted on each transmission node according to the state of the transmission node; the destination end receives the data stream, extracts the identifier, and counts Indicates that the transit node has an abnormal flag, thereby judging the link status, and deciding whether to send a link switching command according to the judging result. The invention realizes fast and accurate detection of link failure, and can switch to the backup link in time to ensure that the system can work normally.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a link hot backup method and system. Background technique [0002] A WCDMA NodeB distributed base station is generally composed of one or more BBUs (WCDMANodeB baseband processing units), and each BBU has a main control module. In a normal working state, only one main control module on a BBU is working in a distributed base station, and the main control modules on other BBUs are in a backup state. The capacity of a BBU is limited, the typical capacity is 3 (cell) × 1 (carrier frequency), since the typical support capability of a general macro base station is 3 (cell) × 4 (carrier frequency), in order to make the distributed base station capacity comparable to The general macro base station is equivalent, and four BBUs need to be used in cascade. Since the BBUs are not connected through the backplane, but are connected through the high-speed bus, the probability of damage...

AI Technical Summary

Problems solved by technology

[0006] Suppose the path used by the current work is path 2. Path 2 involves three high-speed interfaces: BBU2>BBU3, BBU3>BBU1, BBU1>BBU0. Any failure of any of these three high-speed interfaces during the work process can cause link 2 to If it cannot work normally, it needs to switch to work on path 1. In the current solution, only when the high-speed bus interface of BBU1>BBU0 fails, and the high-speed interface between BBU2>BBU0 works normally, the switching operation occurs , that is, when any one of BBU2>BBU3, BBU3>BBU1 fails, as long as the high-speed interface between BBU1>BBU0 is good, it will not cause switching, so that the normal operation of the system cannot be guaranteed. Therefore, the existing thermal Backup switching scheme is incomplete

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