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

A wireless sensor and establishment method technology, applied in the field of layer-number routing establishment, can solve problems such as exhaustion of energy, large network oscillation, and deep topology depth, and achieve the effects of balancing energy consumption, averaging network traffic load, and prolonging life cycle

Inactive Publication Date: 2018-08-10
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment 1

[0040] The embodiment of the present invention combines the characteristics of the RPL routing protocol to establish a stable topology by constructing a directed acyclic graph, and proposes a layer number routing mechanism based on RPL.

[0041] In a wireless sensor network, each wireless sensor acts as a node. The topology of the wireless sensor network includes multiple layers, and each layer includes multiple nodes. The schematic diagram of the layer number routing network topology in the wireless sensor network provided by the embodiment of the present invention is as follows: figure 1 Shown, based on figure 1 As shown in the network topology, the processing flow of a layer number routing establishment method for a wireless sensor network based on RPL provided by an embodiment of the present invention is as follows: figure 2 As shown, including the following processing steps:

[0042] Step 21: After the network initialization is completed, the node calculates the number of laye...

Embodiment 2

[0058] The embodiments of the present invention are attached image 3 The cluster head discovery mechanism in step 22 is described in detail, including the following processing steps:

[0059] Step 31: After the node receives the cluster head competition message from other nodes, the node starts a timer, extracts the layer number and rank value information in the cluster head competition message, and judges the number of layers in the cluster head competition message Whether it is the same as the number of layers where it is located, if it is not the same, ignore it; if it is the same, the node compares the Rank value carried in the cluster head competition message with the rank value of the node itself;

[0060] When the Rank value carried in the cluster head competition message is greater than the node's own Rank value, the node continues to wait to receive cluster head competition messages sent by other nodes. When the cluster head competition message carries a higher Rank value ...

Embodiment 3

[0063] The embodiment of the present invention introduces the cluster head rotation process in detail

[0064] When the parent node of the cluster head node changes, the cluster head node broadcasts a cluster head node resignation message to the outside, and the cluster head node resignation message carries the layer number and source address of the cluster head node;

[0065] After other nodes in the same cluster as the cluster head node receive the cluster head node resignation message, check that the number of layers carried in the cluster head node resignation message is the same as the number of layers of its own node, and the cluster head node resigns If the source address carried in the message is the same as the source address of the sub-optimal parent node of the own node, the cluster head node is deleted from the routing information of the own node;

[0066] Each node in the cluster where the cluster head node is located restarts the cluster head discovery competition proce...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/02H04W40/24H04W84/18
CPCH04W40/02H04W40/246H04W84/18Y02D30/70
Inventor 高德云谭元蕊张宏科赵伟程朱婉婷
Owner BEIJING JIAOTONG UNIV
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