A data transmission method for adaptive transmission power control in cooperative communication
A technology of transmission power control and data transmission method, applied in the directions of wireless communication, location diversity, electrical components, etc., can solve the problems of node death and insufficient node energy in the area near the base station, so as to improve the reliability of network transmission, improve reliability, The effect of guaranteeing network life
Inactive Publication Date: 2017-05-24
湖南师范大学附属中学
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[0004] (2) The problem of network lifetime of wireless sensor network
In this way, the nodes near the base station area die early, because the network life is generally defined as the time when the first node in the network dies
Therefore, in the previous method, the energy of the nodes near the base station is insufficient, and there is a large amount of energy left in the area of the far base station. Some studies have pointed out that when the network dies, the remaining energy of the network is as high as 90%
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and examples.
[0026] This embodiment provides a data transmission method for adaptive transmit power control in cooperative communication, such as figure 1 As shown, when the source node generates a data packet to be sent to the base station, it first encodes the data packet and sends it with a smaller sending radius r b Send your own data packets to m nodes in the cluster. Since the communication radius is small at this time, the bit error rate of the data packet can be ignored. In this way, it is equivalent to having m source nodes. The strategy then selects multiple intermediate clusters and sends data to the base station through the intermediate clusters. Each intermediate cluster also selects m nodes. In this way, m source nodes, each source node sends data to m nodes in the intermediate cluster, and after receiving m data packets, the nodes in the intermediate...
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The invention discloses a data transmission method for adaptively controlling transmission power in cooperative communication. Transmission power during data transmission of nodes far away from a base station is increased with residual energy of the nodes far away from the base station in a network, so that the reliability of data transmission is enhanced. Transmission power which is the same as transmission power in a conventional method is adopted for nodes in a region close to the base station, so that the reliability of end-to-end data transmission for transmitting data to the base station is enhanced under the condition that the network lifetime is not shorter than the network lifetime in the conventional method. According to the method disclosed by the invention, only the transmission power of the nodes with residual energy is increased skillfully with a large amount of residual energy of the nodes far away from the base station in a wireless sensor network in the conventional method, so that the reliability of data transmission of the nodes is enhanced. The reliability of the end-to-end data transmission is a product of the reliability of relay nodes on a routing path, so that the network lifetime is not shorter than the network lifetime in the conventional method on the premise that the data transmission reliability is enhanced.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a data transmission method of wireless sensor nodes in cooperative communication. 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 It is considered to be one of the key basic technologies of the future important Internet of Things network in various special environments and applications such as , marine, and fire. Two key issues in the research of wireless sensor networks are as follows: [0003] (1) How to ensure the reliability of data transmission. Due to the wireless transmission of wireless sensor networks, the unique characteristics of wireless networks are that they are subject to...
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IPC IPC(8): H04B7/026H04W72/04H04W84/18
CPCH04B7/026H04W72/0473H04W84/18
Inventor 左政邦刘安丰
Owner 湖南师范大学附属中学