Dynamic routing building method based on D algorithm in wireless body area network
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A technology of wireless body area network and establishment method, applied in the field of dynamic routing, can solve the problems of limited energy, fast energy consumption of nodes, death and failure, etc.
Active Publication Date: 2014-11-26
HARBIN INST OF TECH
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[0004] At present, the traditional network routing algorithm often chooses the path with the least number of hops between the sink node and the source node to transmit data, but for wireless sensor network
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specific Embodiment approach 1
[0046] Specific implementation mode 1. Combination figure 1 Illustrate this specific implementation mode, the method for establishing a dynamic route based on the D algorithm under the wireless body area network, the specific implementation steps are as follows:
[0047] Step 1. The central node uses the flooding method to obtain information such as the initial topology of the network and the distance and energy between each node. After initialization, the central node obtains the following information:
[0048] The initial topology of each node in the network, the residual energy of each node and the initial energy level of each node.
[0049] Step 2, according to the topological information obtained in step 1, obtain the distance coordinate matrix DD of the network = {d ij}, d ij is the distance between node i and node j. Combined with the electromagnetic wave propagation model of the body surface, the distance coordinate matrix is transformed into the transmission ener...
specific Embodiment approach
[0065] Figure 4 The WBAN shown in is composed of 6 nodes, and the coordinates of each node are given in Table 1. Each node has its unique ID identification. The specific implementation of the inventive method is as follows:
[0066] Table 1
[0067]
[0068]
[0069] Step 1: Node 1 uses the flooding method to obtain information such as the initial topology of the network and the distance to each node, energy, etc., and understands the initial topology of each node in the network, the remaining energy of each node, and the initial energy level.
[0070] Step 2. According to the topological information obtained in Step 1, the distance coordinate matrix of the network is obtained
[0071] DD = { 0 1.00 1.00 1.41 Inf ...
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Abstract
The invention discloses a dynamic routing building method based on a D algorithm in a wireless body area network, and relates to a dynamic routing method. The dynamic routing building method based on the D algorithm in the wireless body area network is used for balancing energy consumption in the network and prolonging the life cycle of the whole network. The method comprises the steps that a center node obtains an initial topological structure of the network through a flooding method, distance between the center node and other nodes and energy information; a range coordinate matrix of the network is obtained; the range coordinate matrix is converted into a transmission energy consumption matrix and weighted, and a weighed transmission energy consumption matrix is obtained; a weight matrix is generated on the basis of the weighed transmission energy consumption matrix Ew through a D algorithm, and after the weight matrix is generated, each node can find the lowest-energy-consumption route to the center node; the nodes carry out data transmission according to the selected lowest-energy-consumption routes. The dynamic routing building method based on the D algorithm in the wireless body area network is suitable for signal transmission in the wireless body area network.
Description
technical field [0001] The invention relates to a dynamic routing method. Background technique [0002] Wireless body area network is essentially a wireless sensor network. Its object of observation is the human body itself, which can judge the movement changes and health status of the human body. It has very broad application prospects in medical treatment, entertainment, security and other aspects. The composition of its network usually includes central nodes and ordinary nodes; among them, ordinary nodes complete the collection and transmission of specific data, and usually need to forward the data of other nodes; the central node is the center of the network, which receives the data sent by each node It can also perform basic processing. Usually, the central node also has the function of the gateway, enabling the body area network to access the mobile network or WLAN, so that users and professionals can view it at any time. [0003] The wireless body area network needs ...
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