A Method for Detecting and Processing Link Validity Between Multiple Nodes
A detection method and multi-node technology, applied in the direction of network traffic/resource management, digital transmission system, data exchange network, etc., can solve the problems of high link tolerance, alarm, low link tolerance, etc., to strengthen the transmission channel Effect
Active Publication Date: 2018-10-16
HEBEI FAREAST COMM SYST ENG
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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
Method used
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Embodiment
[0042] Embodiment: After the system is started, the node sends heartbeat messages to multiple peer nodes respectively, and then waits for the heartbeat response message. If the heartbeat response message or the heartbeat message sent by the peer node is received, the status of this link is updated as Available, and notify the relevant modules that this link is available, and data packets can be sent on this link;
[0043]If the heartbeat response message or the heartbeat message sent by the peer node is not received, the heartbeat request message is sent 6 times in a row, and the heartbeat response message is not received for 3 times in total, the link is invalid; otherwise, the link is valid. Such as Figure 4 shown.
[0044] S4: Calculate respectively the time when each node sends the heartbeat request message next time, and put the corresponding node in the time grid;
[0045] Embodiment: When sending a heartbeat message, sending a data packet, or receiving a data packet ...
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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...
Claims
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IPC IPC(8): H04L12/26H04W24/08H04W28/02
CPCH04L43/0811H04W24/08H04W28/0289
Inventor 孙坤王洪书康瑕朱丽莎李晓玲袁东升
Owner HEBEI FAREAST COMM SYST ENG