Establishment method of layer-type routing in wireless sensor network based on rpl

Abstract

The embodiment of the invention provides an RPL-based layer type route establishment method of a wireless sensor network. The method comprises the steps as follows: layering nodes according to a Rank value from the wireless sensor network established according to an RPL routing protocol, selecting a certain number of cluster heads from every layer according to a specific rule; broadcasting inaugural information around after the cluster heads take office, wherein other nodes determine whether to add in the cluster; adding the cluster heads in a father node list after the nodes are added in the cluster to be used as a suboptimum father node so as to finish the networking of the whole network. In a data routing part, the node is used for transmitting the sensing information collected by itself to the cluster head and the cluster head finishes the process such as data fusion; the node is used for directly transmitting a data package after receiving the data package which does not carry out fusion process to the former optimal father node to avoid secondary fusion. Each node can hold two father nodes and two routes, and can be used for simultaneously transmitting the fused data and the data which is not fused respectively to strengthen network robustness, balance network load and prolong network lifetime.

Description

Technical field [0001] The present invention relates to the technical field of wireless sensor networks, in particular to a layer number routing establishment method of a wireless sensor network based on RPL. Background technique [0002] The wireless sensor network is a multi-hop self-organizing network system formed by a large number of micro sensor nodes deployed in the monitoring area through radio communication. Its purpose is to cooperatively perceive, collect and process the information of the monitored object in the network coverage area , Such as temperature and humidity information, and send these information to the observer. These sensor nodes have low power consumption, low transmission rate, low processing capacity, low energy reserve, and data transmission through multiple hops. [0003] In wireless sensor networks, due to limited capabilities, it is often impossible for nodes to communicate directly. It is usually necessary to use intermediate nodes to transmit sour...

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Problems solved by technology

[0004] In order to expand the network scale, the aggregation nodes often choose high-performance nodes different from ordinary sensor nodes. Although the network topology generated by the RPL protocol can better ensure the stability of the network, because the topology is a tree topology, when the nodes are dense, When the scale is large, the topological depth will be deeper

In the network topology, the sensor nodes that are relatively close to the sink node not only need to collect the sensing information around themselves, but also undertake the task of forwarding the data packets uploaded by the lower layer, so it is easier to run out of energy prematurely.

Once the upper sensor node fails, the entire network will have a large shock

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