Non-connection-oriented reliable redundant network transmission method based on congestion control
A congestion control and redundant network technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as inability to guarantee reliable data transmission, inability to quickly locate faults, and high system resources, so as to improve flexibility and practicality performance, reduced coupling, and reliable data transmission
Active Publication Date: 2020-06-30
CASCO SIGNAL
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Problems solved by technology
[0003] 1) The dual-network communication adopts the cold backup method, and there will be instantaneous flash off and device re-initialization when the network is switched
[0004] 2) UDP is a connectionless transmission control protocol, which cannot guarantee the reliable transmission of data
[0005] 3) The TCP protocol is a connection-oriented transmission protocol, which has poor real-time performance, low efficiency, and high system resource occupation
[0006] 4) When a failure occurs during the communication process, the problem cannot be quickly located
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[0093] 1) Configuration: local node A (RUDP layer msgType=0x01, sliding window SWS init =5, RMP layer msgType=0x01, red network IP=192.168.1.11, PORT=20000, blue network IP=192.168.2.11, PORT=30000). Remote node B (RUDP layer msgType=0x01, sliding window SWS init =5, RMP layer msgType=0x01, red network IP=192.168.1.12, PORT=20001, blue network IP=192.168.2.12, PORT=30001).
[0094] 2) Initialization: call the RUDP layer, RMP layer, and UDP layer initialization interface to complete the initialization, and generate a fault tree log if it fails.
[0095] 3) Send a message:
[0096] a) Application A writes a 10-packet message with msgType=0x01 into the RUDP sending queue. The link maintenance task judges whether the link status of msgType=0x01 is good, and if it is broken, initiates a three-way handshake to establish the link. Remove SWS from send queue init = 5 packets of messages, SN = 1, 2, 3, 4, 5, sent to the RMP layer. If the ReplySN received from the other party is 5...
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The invention relates to a congestion control based non-connection-oriented reliable redundant network transmission method. According to the method, a network communication module is abstracted into three layers, including, a RUDP layer, a RMP layer and a UDP layer. The method comprises the steps that the RUDP layer is responsible for realizing reliable transmission of messages, increasing message headers of the RUDP layer, sending the message headers through a sliding window SWS, verifying received packets, replying a confirm sequence and realizing an overtime retransmission mechanism; the RMP layer is responsible for receiving messages transmitted by the RUDP layer, adding message headers of the RMP layer, realizing a management protocol of the RMP layer and filtering redundant messages while receiving the messages; the UDP layer, which is configured with a red network and a blue network, sends each packet of the RMP messages respectively through the red and blue networks and is responsible for transmitting the received messages to the RMP layer. Compared with the prior art, the congestion control based non-connection-oriented reliable redundant network transmission method has the advantages of being safe, redundant, efficient and the like.
Description
technical field [0001] The invention relates to a network transmission technology of a rail transit signal system, in particular to a non-connection-oriented reliable redundant network transmission method based on congestion control. Background technique [0002] The rail transit signal system requires high stability and high reliability for the communication network. At present, the communication mode based on the underlying API maintenance of Socket is usually adopted. The transmission layer generally adopts the transmission control protocol TCP or UDP, and the underlying layer adopts dual-network cold standby to form a redundant network. Yu communication network, these methods have following deficiencies: [0003] 1) The dual-network communication adopts a cold backup method, and there will be a momentary disconnection and re-initialization of the device when the network is switched. [0004] 2) UDP is a connectionless transmission control protocol, which cannot guarante...
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IPC IPC(8): H04L12/801H04L12/24H04L1/22
CPCH04L1/22H04L41/069H04L47/10
Inventor 夏伟傅林泰周庭梁蒋建金黄邢陈周丹乔艳茹郑琼秦洁心
Owner CASCO SIGNAL