Method for multi-hop wireless sensor network opportunistic routing and system thereof
A wireless sensor network, routing technology, applied in network topology, wireless communication, advanced technology and other directions, can solve problems such as inability to implement
Active Publication Date: 2014-10-08
南京棣拓智能科技有限公司
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Problems solved by technology
A.Basalamah improved the EAX index and proposed cEAX considering the link correlation to measure the expected transmission times of the information packet from the source node to the destination node. However, the calculation of cEAX will not be implemented in the multi-hop wireless sensor network (the number of hops can only be 2. The number of candidate forwarding nodes can only be 2)
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[0032] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0033] The present invention designs a multi-hop wireless sensor network opportunistic routing method, such as figure 1 As shown, the node s is the source node of the communication transmission, the node d is the destination node, the number of members of the candidate forwarding subset is k, and k is specified as an integer according to the design requirements before the method runs. F 1 , the candidate forwarding subset within the range of num hops (num≥1) from the source node is F num . The set of adjacent nodes n of sending node x is denoted as R x , and the set that needs to be used in the selection process of x candidate forwarding subset is denoted as P x , Q x , the result of the algorithm operation is the hop-by-hop candidate forwarding subset. The operation steps of the opportunistic routing method algorithm of the present invention include:
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The invention discloses a method for multi-hop wireless sensor network opportunistic routing and a system thereof. The method comprises the steps of utilizing each node to perform whole network broadcasting of a routing parameter table; enabling a source node to be an initial sending node and calculating link quality indexes; selecting adjacent nodes with link quality indexes larger than a threshold alpha to a node set Px, calculating a path quality index; selecting nodes and adding the nodes to a node set Qx according to the path quality index, selecting k nodes from the nodes to form a node subset F, and calculating a subset quality index; selecting the subset F with the subset quality index minimum to be a first hop candidate forwarding subset F1, replacing the sending point with one node of the first hop candidate forwarding subset F1, obtaining a hop-by-hop candidate forwarding subset; and enabling a data packet sent by the source node to be forwarded through the selected candidate forwarding subset until the data packet is sent to a destination node. According to the method, relevance of a plurality links on the opportunistic routing is considered, merits of node subsets selected in a multi-hop WSN are measured by the combination with the subset quality index, and the robust communication capability is provided.
Description
technical field [0001] The invention relates to a multi-hop wireless sensor network opportunistic routing method and system thereof, and belongs to the technical field of WSN routing (selection) mechanisms. Background technique [0002] At present, more and more fields and industries need the support of water regime information, such as gate, pumping station automation system, meteorology, environment, mountain torrent disaster, dam safety monitoring system, and the information that needs to be collected such as temperature, water level, rainfall, wind speed wind direction etc. [0003] Water regime RTU (remote measurement and control terminal) is an application of RTU technology in the water conservancy industry. An RTU can consist of several, dozens or hundreds of I / O points, which can be placed on site near the measurement points. RTU has at least the following two functions: data acquisition and processing, data transmission (network communication). In addition to col...
Claims
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Login to View More IPC IPC(8): H04W40/12H04W40/24H04W84/18
CPCY02D30/70
Inventor 徐淑芳王慧斌刘阳黄凤辰李臣明沈洁李旭杰李建霓
Owner 南京棣拓智能科技有限公司