A data transmission method for wireless sensor networks using unequal network coding redundancy levels
A wireless sensor and redundancy level technology, applied in wireless communication, advanced technology, climate sustainability, etc., can solve problems such as node energy waste, and achieve the effects of improved reliability, high data transmission reliability, and high network life
Inactive Publication Date: 2019-07-12
CENT SOUTH UNIV
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[0008] The present invention provides a wireless sensor network data transmission method using unequal network coding redundancy levels, the purpose of which is to overcome the problem of node energy waste caused by using coding redundancy levels in the prior art
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[0049] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0050] figure 1 It is a schematic structural diagram of a planar wireless sensor network in a preferred embodiment of the present invention; the wireless sensor network referred to in this embodiment refers to a planar network in which the base station is located at the center, and each sensor node has a unique number. Once the sensor nodes are deployed, all nodes do not move and have the same initial energy and communication range. In each round, each node generates a packet. Due to the lossy nature of wireless channels, packets generated by nodes may be lost. Therefore, when collecting data, it is necessary to maximize the amount of information collected by the base station, minimize the delay, and maximize the network life.
[0051] see figu...
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The invention discloses a wireless sensor network data transmission method using an unequal network coding redundancy level. The lower network coding redundancy level is used at an area with much energy consumption near a base station, and the higher network coding redundancy level is used at an area with residual energy far away from the base station, so as to ensure high data transmission reliability. As end-to-end reliability of data sending to the base station is a product of reliability of every mode on a routing path, the method can effectively prolong the whole network service life and improve energy utilization efficiency while ensuring reliability and meeting requirements of application programs. While it ensures that the method of the invention has the same network service life with traditional methods, the network end-to-end reliability can be improved by at least 14.1%. And under the condition of ensuring that the method of the invention has the same network end-to-end reliability with the traditional methods, the network service life can be improved by more than 20% by using the method of the invention.
Description
technical field [0001] The invention relates to the fields of reliability of wireless sensor network data collection and energy saving, in particular to a wireless sensor network data transmission method using unequal network coding redundancy levels. Background technique [0002] In wireless sensor networks, data packets are transmitted from a sensor node to a base station through multi-hop transmission. Due to the lossy nature of wireless channels, data packets may be lost during transmission. In order to ensure high reliability of network transmission data, researchers have proposed quite a few reliability guarantee mechanisms and methods. These reliability guarantee mechanisms can be divided into the following three categories: [0003] (1) Data retransmission mechanism. When the sending node cannot detect that the receiver has successfully received the data packet within a predetermined time, it will resend the data packet. The sender may retransmit the same data pa...
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IPC IPC(8): H04W40/10H04W40/14H04W40/20
CPCH04W40/10H04W40/14H04W40/20Y02D30/70
Inventor 刘安丰张琦闵洁陈伟
Owner CENT SOUTH UNIV