Cross-layer routing method based on multi-node collaborative beam forming in wireless sensor network
A wireless sensor network and beamforming technology, applied in wireless communication, transmission system, digital transmission system, etc., can solve the problems of cluster head node heavy burden, sensorless nodes, unknown area, etc., and achieve extended survival time and high diversity The effect of gain and energy balance
Inactive Publication Date: 2010-12-29
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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Problems solved by technology
[0009] What the present invention aims to solve is that in the existing routing method, the burden of the cluster head nodes is heavy, so that all the energy is exhausted prematurely, resulting in the need for the network to frequently adjust the cluster heads, and with the failure of some cluster head nodes, the network There will be problems such as some unknown areas without sensor nodes
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] The wireless sensor network shown in Fig. 1 includes cluster head nodes, sensor nodes in the cluster and sink nodes, and each sensor node is divided into several clusters for organization. The thin arrow indicates that in the traditional routing protocol, the data sensed by each sensor node reaches the sink node through one or more hops through the cluster head node. The flower arrows indicate that in the cross-layer routing method based on multi-node cooperative beamforming of the present invention, the data sensed by each sensor node is under the control of the cluster head node, and each node in the cluster transmits cooperatively and arrives at one or more hops. gathering nodes.
[0022] FIG. 2 is a schematic flow chart of the present invention, including two processes of route establishment and data transmission.
[0023] In the routing es...
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The invention discloses a cross-layer routing method based on multi-node cooperative beam forming in a wireless sensor network, which at least comprises the two steps of routing table establishment and data transmission. During the establishment process of a routing table, cluster head nodes establish the routing table and design a beam forming vector for every next hop node; during the process of data transmission, all nodes in the cluster adjust respective signal sending amplitude and phase according to the beam forming vector and establish connection with the next hop node so as to transmit data cooperatively. By cooperative beam forming and cross-layer routing of all sensor nodes, the method of the invention can not only obtain comparatively high diversity gain and improve the energy efficiency of the network, but also can bear the load of data transmission by cooperative working of all the nodes in every cluster during the communication process, thereby ensuring comparatively balanced energy consumption of all the nodes in the whole cluster and prolonging the survival time of the network.
Description
technical field [0001] The invention relates to a wireless sensor network, in particular to a cross-layer routing method based on multi-node cooperative beamforming. Background technique [0002] With the rapid development and maturity of communication technology, embedded computing technology and sensor technology, wireless sensor nodes with perception, computing and communication capabilities have begun to appear and have attracted great attention. Such wireless sensor nodes constitute a wireless sensor network that can coordinately perceive, collect and process various environmental information or monitoring object information in the network coverage area, and release them to users who need this information. The wireless sensor network integrates the logical information world and the real physical world, profoundly changing the interaction between human and nature, and can be widely used in many fields such as military, industrial and agricultural control, biomedicine, an...
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IPC IPC(8): H04L12/56H04L12/28H04W28/08H04W40/24
CPCY02D30/70
Inventor 姜建施玉松陈晨万溢萍姜华刘海涛
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS