Improved CARP routing protocol

Abstract

The invention discloses an improved CARP routing protocol. The protocol of selecting an optimal data transmission relay node comprises the following steps that step1, when a sensor node nvsn broadcasts one PING control information packet, a channel quality parameter g(nvsn) value of a sensor node which is adjacent to the node nvsn is calculated; step2, the adjacent nodes of a previous data transmission relay node and all the g(nvsn) values in a range (beta*g(omega), infinite) reply a PONG packet, wherein the threshold value beta is a floating number in a range of 0-1; step3, in the adjacent nodes of all the g(nvsn) values in the range (beta*g(omega), infinite), an upper layer of node uvz of a maximum g(nvsn) value is selected, and the uvz is selected as the relay node of current data transmission if a condition which is defined in the description is satisfied; otherwise, a last-time relay node is continuously used. When the optimal data transmission relay node is selected, a PING-PONG redundancy control information packet is reduced. Further, a data packet uploading algorithm is provided so that data collected by the sensor is used in high-efficiency and energy-saving mode.

Description

technical field [0001] The invention relates to an improved CARP routing protocol. Background technique [0002] The ocean covers more than 70% of the earth's surface area, the earth's environment is deeply affected by the ocean, and human life is heavily dependent on the ocean. Underwater sensor networks (a network established by deploying underwater sensor nodes with low energy consumption and short-distance communication in designated sea areas) are considered to be a reliable choice for exploring the underwater environment. Among them, the vast majority of sensor nodes are powered by batteries. Therefore, improving energy efficiency is the most basic principle when designing routing protocols that collect detection data and upload these data to surface base stations. [0003] CARP (Common Access Redundancy Protocol: Common Address Redundancy Protocol) is a location-independent and layer-by-layer greedy routing protocol. It uses the hop count of sensor nodes to represen...

AI Technical Summary

Problems solved by technology

[0004] The performance and applicability of CARP have been evaluated in the actual marine environment. When the network topology is relatively stable, CARP's optimal data transmission relay node selection strategy, that is, the PING-PONG strategy, will generate a large amount of redundant control information packets, causing network congestion and reducing the efficiency of data transmission

In addition, CARP does not consider reusing previously collected probe data to support certain domain-specific applications (some applications can still work well when the value of the probe data changes within a certain threshold range)

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