Data Transmission Scheduling Method Based on Unequal Relay Sets in Wireless Sensor Networks

Abstract

The invention discloses a data transmission scheduling method based on an unequal relay set in a wireless sensor network. The data transmission scheduling method is characterized in that the data transmission scheduling method a defect that same number of relay nodes is selected in a whole network in previous research according to characteristics of high energy consumption by near base stations, low energy consumption by remote base stations, and large amount of residual energy according to energy consumption of the wireless sensor network. According to the data transmission scheduling method, a relatively large number of relay nodes are selected for the node for data transmission at a remote base station area. Along with number increase of the selected relay nodes, waiting time of the node for waking-up of the relay node reduces. Therefore data transmission delay reduction is realized. Furthermore data transmission success rate is improved, and high data transmission reliably is realized. Therefore, compared with an existing method, the data transmission scheduling method has advantages of improving data transmission reliability and reducing data transmission relay on condition that network service does not reduce.

Description

technical field [0001] The invention belongs to the field of wireless sensor network data transmission, and particularly relates to how to apply a transmission strategy in a wireless link that is sensitive to delay and has a certain loss in network transmission, so that the reliability of network data transmission is high, the delay is small, and the network life is long. data transfer method. Background technique [0002] A wireless sensor network is a wireless network composed of a large number of sensor nodes that communicate with each other through multi-hop wireless links and in a self-organizing and multi-hop manner. It can be widely used in industrial monitoring, agriculture, civil, environmental monitoring, battlefield , ocean, fire and other special environments and applications, it is considered to be one of the key basic technologies of the future important IoT network. Reliable, low-latency data transmission in wireless sensor networks is an important research t...

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Problems solved by technology

[0005] (3) The problem of network lifetime of wireless sensor network

Therefore, although the more relay nodes, the higher the reliability of data transmission, but the more relay nodes, the number of transmission attempts, the longer the node waits, and thus the greater its energy consumption

The existing strategy is to select a fixed number of relay nodes. This strategy does not consider the distance between the nodes and the base station, so the energy consumption of the nodes closer to the base station is often too fast, while the energy consumption of the farther nodes is less, thus The energy consumption of the entire network is unbalanced, and the reliability of data transmission cannot be guaranteed. Therefore, it is necessary to improve the performance of the current wireless sensor network data transmission scheduling method

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