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A wireless sensor network relay node transmit power optimization method

A wireless sensor and relay node technology, applied in the field of communication, to achieve the effect of small sum of transmit power

Active Publication Date: 2018-06-08
上海鑫炙智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The application number is 201110284210.4, and the patent name is a relay node selection method and device, which obtains information on various access modes of sending nodes and / or receiving nodes, and selects at least one relay node according to information on multiple access modes, without involving relay The problem of node transmit power optimization

Method used

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  • A wireless sensor network relay node transmit power optimization method
  • A wireless sensor network relay node transmit power optimization method
  • A wireless sensor network relay node transmit power optimization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Networking step: the sending node and all relay nodes are connected to the receiving node by accessing a physical random access channel (PRACHPhysical Random Access Channel), and the receiving node obtains information from the sending node and each of the relay nodes information, and obtain time slot synchronization to form a wireless sensor network.

[0063] Uplink sounding step: the sending node and all relay nodes send an uplink sounding reference signal (SRS) through an uplink channel in sequence, and the uplink channel is used for uplink scheduling, link adaptation and power control, etc. channel, the receiving node receives and demodulates the uplink sounding reference signal, so as to obtain the ratio SNR of the channel gain and noise of the uplink channel of each of the relay nodes, and the channel gain of each of the relay nodes can be calculated .

[0064] When the sending node sends the uplink sounding reference signal, any one of the relay nodes receives th...

Embodiment 2

[0081] If the distance between the sending node and the receiving node is long, and the channel condition is poor, the receiving node does not receive the information sent from the sending node, and only receives information from each of the receiving nodes in the second time slot. Following the information of the nodes, and then merging the information, and decoding, compared with the previous method, the difference is:

[0082] In the sending step of the sending node, when the sending time slot for the sending node to send information, that is, the first time slot arrives, the sending node sends information, each of the relay nodes receives and stores the information, and the receiving node shuts down.

[0083] In the receiving step of the receiving node, the receiving node receives the information from each of the relay nodes, combines them, and then decodes them to obtain corresponding information. If the decoding is unsuccessful, it sends information to each of the relay n...

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PUM

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Abstract

The invention discloses a method for optimizing relay node transmitting power in a wireless sensor network in the communication field. The method comprises the steps as follows: a networking step: establishing the wireless sensor network with a transmitting node, a plurality of relay nodes and a receiving mode; an up detecting step: enabling the receiving node to obtain channel gains between each relay node and the transmitting node; a transmitting power optimal computation step: the receiving node obtaining the channel gains with each relay node and the channel gains with the transmitting node, and optimizing the transmitting power of each relay node; a down control step: the receiving node stipulating time slot of transmitting information with the transmitting node and the time slot of transmitting information with each relay node, and the optimized transmitting power of each relay node; a transmitting node transmitting step, a relay node forwarding step and a receiving node receiving step. The technical effect is that the method of the invention could minimize the sum of transmitting power of all relay nodes under the premise of ensuring the correct decoding of the receiving node.

Description

technical field [0001] The invention relates to a transmission power optimization method of a wireless sensor network relay node in the communication field. Background technique [0002] Since the 1990s, sensors with sensing, computing and wireless network communication capabilities and the wireless sensor network (WSN) formed by them have begun to appear around the world, which has attracted great attention. [0003] A wireless sensor network is a wireless network composed of a group of sensor nodes in a self-organizing manner. Processing allows people to obtain a large amount of detailed and reliable information at any time, in most places and under a variety of environmental conditions. The sensor node is the basic unit of the wireless sensor network. The sensor node usually includes the sending node, the relay node and the sink node. The information collected by the sensor node is transmitted hop by hop through other sensor nodes. The information collected by a sending ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W52/26H04W52/46
CPCH04W52/241H04W52/26H04W52/46
Inventor 苏前敏
Owner 上海鑫炙智能科技有限公司