Data collection method for energy heterogeneous wireless sensor network

Abstract

The invention discloses a data collection method for an energy heterogeneous wireless sensor network. The method comprises the following steps of 1, a network measurement stage, specifically including establishing a corresponding relation between voltages and electric quantities, then collecting voltage information of sensor nodes by an initial routing tree to estimate the electric quantities, and meanwhile collecting neighbor information of the nodes to establish a network topology; 2, a network decomposition stage, specifically including dividing a network into two communicated sub-networks according to the topology information; 3, a sub-network solution stage, specifically including finding routing structures of the sub-networks by establishing an integral linear programming problem; and 4, a routing distribution stage, specifically including distributing the routing structures to the network, and updating the routing structures by the nodes to send the data to an aggregation node. The method of the invention can be applied to the sensor networks with different residual electric quantities of the nodes, and the routing structure with the longest service life can be more rapidly established.

Description

Technical field [0001] The invention belongs to the technical field of wireless networks, is a method for transmitting information in a wireless sensor network, and specifically relates to a data collection method for an energy heterogeneous wireless sensor network. Background technique [0002] One of the main applications of wireless sensor networks is to monitor environmental conditions and periodically send the monitored data to the sink node. For example, when applied to ecological environment monitoring or building quality monitoring, sensor nodes need to periodically collect specified Data, and then transmit the data to the sink node in some way for subsequent processing. Optional transmission methods include tree structure and mesh structure. In the tree structure, each node needs to send data to the parent node, and the flow of data is a tree rooted at the sink node, called a routing tree. In a mesh structure, each node can send data to different nodes. Since the rout...

AI Technical Summary

Problems solved by technology

First, it takes a long time to construct the routing structure. The experiment found that when the number of nodes increases to 40, more than 20% of the network cannot find the routing structure within 2 hours, which greatly limits the practicability of the method

The second is that it does not consider the operation mode of the method in practical applications, such as how to estimate the initial power and collect and distribute routing decisions, etc.

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