Detecting and processing method for validity of link among multiple nodes

Abstract

The invention discloses a detecting and processing method for validity of a link among multiple nodes, and belongs to the field of multi-node link transmission of a TETRA digital trunking system. A multi-node data mutual transmission link generally has multiple phenomena, including, long-term validity, link long-term disconnection, link recovery after disconnection, disconnection in link validity process, and alternate link disconnection and recovery. Due to the phenomena, various abnormal conditions for applications are aroused in a practical running process. The detecting and processing method for validity of the link among multiple nodes comprises the steps of calculating time when a heartbeat request is sent at each time; dispersing the time on a time grid; detecting the validity of the link in a preset period; and performing detection for link recovery by adopting a hypothetical recovery strategy in a link recovery process. Through the ways mentioned above, feedback of the validity of the link is added, and accurate guarantee is provided for link selection of the applications.

Description

technical field [0001] The invention relates to the field of multi-node link transmission of a TETRA digital trunking system, in particular to a method for detecting and processing the validity of links between multi-nodes. Background technique [0002] In the digital trunking system, the switching center and the base station can be regarded as nodes that communicate with each other. Each node communicates through a selected communication protocol, and each node requires the link between the two nodes to have reliability requirements. In actual link conditions, the status of the link may include long-term active link, long-term link disconnection, link disconnection and then recovery, link disconnection during the effective process, link disconnection and recovery alternately, etc. Phenomenon. In the case of complex network quality, the unstable transmission system will have various unexpected effects on the functions of the digital trunking, such as delay in call establish...

AI Technical Summary

Problems solved by technology

[0003] In order to detect these states, the existing technology usually uses the method of receiving no response message from the other party for N consecutive heartbeat detections. This detection method can detect the above phenomena to a certain extent, but in the actual application process, The value of N determines the speed of the detection result. If the value of N is too small, the detection will be fast, but the tolerance of the link is too low; if the value of N is too large, the detection will be slow, but the tolerance of the link will be high

In addition, N consecutive heartbeat detections will fail to detect the alternate occurrence of link disconnection and recovery, and sometimes bring the possibility of constant link status alarms

[0004] As the number of nodes increases, the number of nodes that a node needs to connect to also increases, which will bring high concurrency requirements for single-node and multi-node links, and also cause detection requirements for reliability detection between nodes. The trouble with too many timers

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