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Relay selection method for reducing transmitting power

A technology for transmitting power and relay nodes, which is applied in power management, access restriction, electrical components, etc., can solve the problems of traditional model applicability limitations, etc., to avoid high algorithm complexity, simple algorithm, and reduce system transmit power. Effect

Inactive Publication Date: 2011-09-28
HEBEI UNIV OF TECH
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Problems solved by technology

However, the system model is a traditional model of single source node-multiple relay nodes-single destination node, but in practical applications, there are generally more than one source node, and the applicability of the traditional model is limited

Method used

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  • Relay selection method for reducing transmitting power
  • Relay selection method for reducing transmitting power
  • Relay selection method for reducing transmitting power

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Embodiment Construction

[0020] Further describe the present invention below in conjunction with embodiment and accompanying drawing thereof:

[0021] The relay selection method (hereinafter referred to as the method for short) that reduces the transmission power designed by the present invention, see Figure 1-8 ), the general idea is: after the relay receives the signal, it estimates the channel state information between the source node and the relay node, and then sends this information to the source node, and then the source node chooses which relay to participate in forwarding.

[0022] The overall system model of the inventive method is a wireless communication system of a plurality of source nodes-multiple relay nodes-single destination node (see figure 1 ). Let: S 1 …S i …S M be M source nodes, one of which is the control source node (the control source node also has the function of sending information, which increases the control function compared with the common source node; in figure 1...

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Abstract

The invention discloses a relay selection method for reducing transmitting power. The method comprises the following specific steps: a source node firstly sends a RTS (request to send) message; a relay point received the RTS message carries out a channel estimation according to the information and obtains channel status information between the source node and the relay point; each relay point sends a CTS (clear to send) message to the control source node; when the control source node receives the CTS message, the control source node selects a relay for transmitting the information to each source node according to the content of the CTS message through using the designed algorithm; then the control source node informs each source node of the selected result in message mode; the relay receives the RTC message and then responses the CTC message; and after the source node receives the CTC message, the source node formally sends a message through collaborating with the relay node. The selection method provided by the invention is relatively simple and can reduce the transmitting power of the system to a great extent.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a relay selection method capable of reducing transmission power. This method is used in wireless communication to solve how to select a repeater and can reduce the transmission power for signal transmission strategy. Background technique [0002] At present, the use of digital repeaters in wireless communication is becoming more and more common. It can expand the coverage area of ​​a new generation of wireless communication systems and improve communication quality. Generally, multiple repeaters are distributed around a base station. Most current wireless networks use all repeaters within the coverage area to participate in forwarding, but due to the randomness of wireless channels, not every repeater is necessary to participate in signal forwarding. At the same time, the digital repeaters in the wireless communication network need power supply, and some repeaters can only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/20H04W52/46
CPCY02B60/50
Inventor 刘剑飞李文博王蒙军曾祥烨郝禄国
Owner HEBEI UNIV OF TECH
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