Low-delay underwater cross-layer opportunistic routing method

Abstract

The invention discloses a low-delay underwater cross-layer opportunistic routing method, which is characterized by comprising the following steps that: step 1, an aggregation node in an underwater sensor network sends out a first-level probe packet and a second-level probe packet to layer a plurality of underwater nodes twice to form a neighbor table; and 2, a sending node selects a plurality of underwater nodes as the next hop of the sending node according to the neighbor table, and elects a forwarding node through a waiting mechanism, wherein the neighbor table is updated according to the network topology. According to the invention, the control packet of the MAC layer is reduced by using the routing information, and the information of the MAC layer can reduce the consumption of neighborinformation between maintenance nodes so as to reduce the control packet in the routing stage; the neighbor information and opportunistic routing method reduces the use of control packets and the multi-copy situation of data, thereby reducing the end-to-end delay and the overall energy consumption of the network.

Description

technical field [0001] The present invention relates to the technical field of underwater wireless communication, and more specifically, the present invention relates to a low-delay underwater cross-layer opportunistic routing method. Background technique [0002] Routing technology is the key technology of the third network layer in the OSI model of computer networks. Underwater routing is an important technical support for underwater wireless sensor networks (UWSN), and has always been a research hotspot in computer science. [0003] In the underwater environment, due to the difficulty of long-distance transmission of optical signals, underwater acoustic communication is usually used. However, the propagation speed of underwater acoustic communication is slow, the bandwidth is low, and it is easy to be interfered. It is difficult to quickly and remotely transmit some urgent data collected underwater to the surface of the water without loss. Therefore, how to use the under...

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Problems solved by technology

[0008] In addition, the impact of the MAC layer on the end-to-end delay is rarely considered in the existing underwater routing technology

In the process of end-to-end data transmission, because the underwater MAC layer technology needs to exchange control packets before each data transmission in order to reduce conflicts, it will also increase the end-to-end delay.

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