Method for balancing network load based on wireless sensor energy information

Abstract

The invention relates to a network load balancing method based on energy information of a wireless sensor, comprising the following steps: (1) Sink broadcasts an energy report message; (2) nodes receive an energy report of the Sink and then update and maintain local load forwarding tables; (3) the load allocation proportion born by various forwarding nodes and the load born by the various nodes are calculated; (4) the message is forwarded when local nodes are far away from convergent nodes compared with the forwarding nodes or are brother nodes of the same layer with the forwarding nodes; (5) various field values in the message are modified by self energy information and the message is forwarded to all the lower-level neighboring nodes or all the brother nodes of the same layer except the forwarding nodes; (6) when all the nodes receive the energy report message, the message forwarding is stopped; (7) after the energy report message is forwarded within a single period, propagation paths which reversely use the energy report message establish a load convergent route from sensing nodes to the convergent node Sink hop by hop; and (8) the convergent node Sink periodically sends out the energy report message and completes allocation and convergence of sensing data. The method solves the problems of network load balancing and network life cycle of a large-scale wireless sensor.

Description

technical field [0001] The invention relates to a load balancing method for a wireless sensor network, which belongs to the technical field of wireless sensor networks. Background technique [0002] The wireless sensor network is composed of a large number of cheap micro sensor nodes deployed in the monitoring area. It is a multi-hop self-organizing network system composed of wireless communication. It can be widely used in military affairs, environmental monitoring and forecasting, medical care, and building status. Surveillance, smart home and other fields. [0003] The key technologies of wireless sensor network research include network topology control, routing technology, node positioning technology, time synchronization, data fusion and management, energy management scheme, network security, etc. The invention mainly relates to two aspects of wireless sensor network routing technology and energy management. [0004] The characteristics of the wireless sensor network ...

AI Technical Summary

Problems solved by technology

Efficient use of network energy is a prominent feature of sensor network routing protocols. Some sensor network energy-aware routing protocols proposed in the early days often only considered energy factors, and proposed maximum available energy routing, minimum energy consumption routing, maximum and minimum available energy routing, etc., but All need to know the topology information of the whole network

Rahul C. Shah et al. (see Shah R C, Rabaey J M. Energy aware routing for low energyad hoc sensor networks. Wireless Communications and Networking Conference (WCNC'02), IEEE, Volume 1, 17-21 March, 2002) proposed The energy multi-path routing mechanism establishes multiple paths between the source node and the destination node. According to the communication energy consumption of the nodes on the path and the remaining energy of the node, a certain selection probability is given to each path, and the path is selected in the routing table according to the probability. A node is used as the next hop node of the route, but frequent use of the same path to transmit data will cause the nodes on the path to fail prematurely due to excessive energy consumption, so that the entire network is divided into isolated parts that are not connected to each other, reducing lifetime of the network

Images