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Wireless sensor network node collaboration method based on feedback channel

A technology of wireless sensors and network nodes, applied in transmitter/receiver shaping network, data exchange network, transmission system, etc., can solve the problems of practical distance and no consideration, so as to reduce the transmission power and extend the network Effects of lifespan and transmission energy saving

Inactive Publication Date: 2009-02-11
NANCHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Previous research on clustering cooperation mainly focused on coding schemes or some energy consumption models, and did not consider which nodes are allowed to participate in cooperative communication in a transmitting cluster or receiving cluster, and what choices are taken for these cooperative nodes strategy, so there is still a certain distance from the practical aspect

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  • Wireless sensor network node collaboration method based on feedback channel
  • Wireless sensor network node collaboration method based on feedback channel
  • Wireless sensor network node collaboration method based on feedback channel

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Embodiment Construction

[0016] like figure 1 As shown, it can be seen that when the distance between clusters is 100m, when the distance between clusters is 100m, the performance value of our method is about 50% better than the chernoff performance bound, and it is better than the method of randomly selecting cooperative nodes17 %.

[0017] The method steps of the present invention are:

[0018] 1) After the wireless sensor network nodes are arranged into clusters, in the transmission cluster Tx, each node According to pre-scheduled time slots Send the training sequence to the receiving cluster by broadcasting;

[0019] 2) In the receiving cluster, for each node j, 1#j N r After receiving the training sequence of Tx, the channel fading coefficient is estimated H j = [ h j 1 · · · h j...

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Abstract

A wireless sensor network node cooperation method based on a feedback channel is characterized in that the method comprises the following steps: (1) transmitting a training sequence to a receiving cluster by a sensor network transmitting cluster; (2) transmitting a channel fading coefficient to a relay node after the receiving cluster receives an information; (3) determining transmission nodes that should participate in the cooperation by the relay node according to the channel fading coefficient; (4) selecting a transmission node to transmit a data information, and setting other nodes in the sleep state; and (5) re-transmitting a training sequence by the transmitting cluster to form a new work period after the coherence time comes. The wireless sensor network node cooperation method has the advantages that the nodes with better channel state can participate in cooperation to transmit information by using the feedback channel to feedback the state information of the channels, thereby finally reducing the transmission power and saving transmission energy.

Description

technical field [0001] The present invention relates to a network node cooperation method, in particular to a wireless sensor network node cooperation method based on a feedback channel. Background technique [0002] In wireless sensor networks (WSN), the power supply of each node is usually not replaceable, so node energy consumption is a key issue. In some practical applications of WSN, such as battlefield environment monitoring, the energy loss of WSN communication is greatly affected by the actual physical environment. A major factor that causes the energy consumption of transmission is the multipath of the channel, and the signal is fading due to the influence of the multipath. To ensure the quality of service (QoS) of the entire network, the transmitting end must increase the transmitting power in order to overcome the influence of multipath, thereby causing greater energy loss. [0003] MIMO is a diversity technology developed in recent years to overcome multipath, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L12/56H04L25/03H04B7/06H04B1/707
CPCY02B60/50Y02D30/70
Inventor 龙承志向满天李立宏陈卉邹文生张坚林
Owner NANCHANG UNIV
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