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Power distribution, channel distribution and relay node selection combined optimization method

A channel allocation and relay node technology, applied in power management, wireless communication, transmission control/equalization, etc., can solve problems such as slow convergence speed of convex optimization methods

Active Publication Date: 2009-07-15
EASYWAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in an actual wireless relay communication system with a large number of nodes, this problem is transformed into a high-dimensional optimization problem with many optimization variables, and the standard convex optimization method will still converge very slowly.

Method used

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  • Power distribution, channel distribution and relay node selection combined optimization method
  • Power distribution, channel distribution and relay node selection combined optimization method
  • Power distribution, channel distribution and relay node selection combined optimization method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Consider the joint optimization method of relay node selection, power allocation and resource allocation in time division multiple access (TDMA) relay communication system. In this relay communication system, each relay node adopts two relay transmission modes: Non-regenerative Decode and Forward (NDF) and Amplify and Forward (AF). And each relay node adopts a half-duplex mode, that is, the relay node uses two orthogonal channels for receiving information sent by the source (the first hop) and forwarding the information to the destination (the second hop).

[0039] The joint optimization method of relay node selection, power allocation and resource allocation in this communication system is specific, such as figure 2 shown, including the following steps:

[0040] (1) System initialization: distribute the transmission power and channel resources of each source and relay node in the wireless relay communication system to each link in an even or random manner;

[0041] ...

Embodiment 2

[0054] Consider the joint optimization method of relay node selection, power allocation and resource allocation in frequency division multiple access (FDMA) relay communication system. In this relay communication system, each relay node adopts two relay transmission modes: Regenerative Decode and Forward (RDF) and Compress and Forward (CF). And each relay node adopts a half-duplex mode, that is, the relay node uses two orthogonal channels for receiving information sent by the source (the first hop) and forwarding the information to the destination (the second hop).

[0055] The joint optimization method of relay node selection, power allocation and resource allocation in the communication system, such as image 3 As shown, it specifically includes the following steps:

[0056] (1) System initialization: distribute the transmission power and channel resources of each source and relay node in the wireless relay communication system to each link in an even or random manner;

[...

Embodiment 3

[0068] Consider the joint optimization method of relay node selection, power allocation and resource allocation in Orthogonal Frequency Division Multiple Access (OFDMA) relay communication system. In this relay communication system, each relay node adopts two relay transmission modes: Regenerative Decode and Forward (RDF) and Compress and Forward (CF). And each relay node adopts a half-duplex mode, that is, the relay node uses two orthogonal channels for receiving information sent by the source (the first hop) and forwarding the information to the destination (the second hop).

[0069] The joint optimization method of relay node selection, power allocation and resource allocation in this communication system, the flow chart is shown in Figure 4 , including the following steps:

[0070] (1) System initialization: distribute the transmission power and channel resources of each source and relay node in the wireless relay communication system to each link in an even or random ma...

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Abstract

The invention relates to a joint optimization method for relaying node selection, power allocation and resource allocation, which belongs to the field of wireless communication resource management. The method adopts an iterative method for power allocation and channel allocation to realize the joint optimization of the power allocation and the channel allocation; if in a joint optimization result, the allocation parameters of transmit power and the channel when a relaying node assisting one link to communicate are not zero, the relaying is selected to serve the link; if the allocation parameters of the transmit power and the channel when a relaying node assisting one link to communicate are zero, the relaying node is not selected to serve the link; the iterative method for the power allocation and the channel allocation refers to that a power allocation process is carried out according to the channel allocation result, and a channel allocation process is carried out according to the power allocation result, and the two processes carry out a mutual iterative process, thus realizing the joint optimization. The method of the invention has lower computational complexity and higher convergence speed, and can satisfy the requirement of a wireless relaying communication system managing wireless resources.

Description

technical field [0001] The invention belongs to the field of wireless communication resource management, in particular to a joint optimization method for power allocation, channel allocation and relay node selection. Background technique [0002] The next generation mobile communication system must not only be able to provide communication services with high data rate and high reliability, but also support the respective Quality of Service (QoS: Quality of Service) requirements and fairness criteria of different services. Wireless relay communication utilizes the broadcast characteristics of wireless channels, and uses the received signal and transmit power of the relay node to cooperate with the source-sink link for communication. It can improve the transmission rate of the wireless communication system, reduce the bit error rate, improve Coverage, with a wide range of application scenarios. [0003] In a wireless communication system, the transmitter of each node is limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/38H04B7/005
Inventor 周世东孙引张秀军肖元章
Owner EASYWAY
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