Underwater acoustic wireless networking method and device based on DTN architecture

[0090]Example 1:

[0091]Such asimage 3 As shown, the specific process of data interaction between different nodes is as follows:

[0092]The routing node R in a certain logical area of ​​the DTN network is in the monitoring state, waiting for the automatic access of the source node S1 and the source node S2 for data transmission, and the Bundle service of the source node S1 or the source node S2 for data transmission When the module 11 has a Bundle message packet to be sent, the serial port convergence layer module 12 first generates a control packet with the ID number of the local routing node and sends it to the underwater acoustic communication module 2 through the serial port, and the protocol module 21 in the underwater acoustic communication module 2 controls this The packet is encapsulated into an underwater acoustic protocol data packet, and then encoded and modulated by the modem module 22, and finally transmitted to the underwater acoustic channel by the transmitting module 23, and the receiving module 24 in the underwater acoustic communication module 2 of the routing node R receives the data packet Then, it is demodulated and decoded by the modem module 22 and uploaded to the protocol module 21. The protocol module 21 parses the control packet and transmits it to the serial port convergence layer module 12 in the DTN module 1 through the serial port. The serial port convergence layer module 12 The routing node ID number information contained in the control packet establishes a link to the source node S1 or the source node S2 corresponding to the ID number, and returns a control packet with its own routing node ID number to the corresponding source node S1 or source node S2, the corresponding source node S1 or source node S2 establishes a link with routing node R after receiving, the process of establishing a link between source node S1 or source node S2 and routing node R Among them, only one of the source node S1 or the source node S2 can compete successfully in the same period, and the other routing node restarts the link establishment process after the timeout. After the link between the sender and receiver is successfully established, if the source node S1 or S2 of the data sending and the routing node R of the data receiving have the next hop node that is the Bundle message packet of the other party, the Bundle message packet that meets the conditions will be sent Send each other to each other and wait for the other party to reply confirmation. After receiving the confirmation, delete the Bundle message package from the storage module 13. The routing node R sends the Bundle message packet whose destination node is area 2 in the storage module 13 to the gateway node G through the TCP/UDP convergence layer, and the gateway node G obtains the best path information according to the DTLSR algorithm and forwards the Bundle message packet to area 2.

[0093]Example 2:

[0094]Such asFigure 4As shown, in the underwater acoustic wireless local area network, when the source node S1 sending data and the routing node R receiving data are communicating on the successfully established link, if the source node S2 sending data passes through this period of time Sending a control packet to initiate the link establishment process with the routing node R will interrupt the communication link between the source node S1 and the routing node R, and then the source node S1 needs to compete for access to the routing node R again.