Method for quickly sensing meeting nodes based on cross-layer triggering in opportunistic network

Abstract

The invention relates to a method for quickly sensing meeting nodes based on cross-layer triggering in an opportunistic network. Aiming at the defects that the traditional opportunistic network routing technology is used for sensing the meeting nodes by periodically sending index messages and can not achieve the purpose of meeting and sensing the nodes simultaneously, the invention realizes the purpose of quickly sensing the meeting nodes in real time through cross-layer information sharing and cooperative operation. The method comprises the following steps of: operating cross-layer reportingfunction control at an internal network layer of the nodes to enable the meeting times of the reporting nodes at a physical layer to be consistent with the actual meeting times; meanwhile, operating an index message sending and timing mechanism at the internal network layer of the nodes to increase the cross-layer triggering operation of the physical layer of index message sending; and carrying out self-adaptive adjustment on the timing initial point of an index message sending period. The invention realizes the purpose of quickly sensing the meeting nodes triggered in a cross-layer way in real time for the opportunistic network with lower cost, is favorable for shortening the sensing delay and the data packet transmission delay of the meeting nodes, saves the network resources, and improves the routing efficiency.

Description

technical field [0001] The invention relates to exchange-based routing technology in opportunistic networks, in particular to a node perception method in opportunistic networks. Background technique [0002] An opportunistic network is a self-organizing network that can tolerate time delay and breakage without requiring a complete path between the source node and the destination node, and uses the chance of meeting brought about by node movement to achieve communication. As a new type of network, opportunistic networks can complete communication tasks in the case of wireless link disconnection and network splitting, and can transmit information between source and destination nodes even if the end-to-end path does not exist. It is not only a specific network form, but also a new network communication technology. It is regarded as one of the important directions of mobile Ad Hoc network development, and it is of great significance to ubiquitous computing in the future. [000...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the exchange-based routing technology in the existing opportunistic network periodically sends index messages to sense node encounters, and there is a certain delay in the sensing time, which cannot achieve "meeting is sensing"; nodes After sending data or control information, the periodic sending and timing of index messages are not adjusted accordingly, which brings some unnecessary waste of resources

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