Resource distribution method and device for multi-relay orthogonal frequency division multiplexing system

A technology of resource allocation and orthogonal frequency division, applied in the field of wireless network communication, to achieve the effect of improving transmission rate and optimizing system performance

Inactive Publication Date: 2011-06-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In the process of realizing the present invention, the inventors found that there is room f

Method used

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  • Resource distribution method and device for multi-relay orthogonal frequency division multiplexing system
  • Resource distribution method and device for multi-relay orthogonal frequency division multiplexing system
  • Resource distribution method and device for multi-relay orthogonal frequency division multiplexing system

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Embodiment 1

[0036] Embodiment 1, a resource allocation method. The flow of the method is attached figure 2 shown.

[0037] figure 2 In S200, acquire actual channel information. The actual channel information here may be the equivalent channel gain of each subcarrier.

[0038] The process of obtaining the actual channel information may be: first obtain the channel coefficient of each subcarrier, and then calculate the equivalent channel gain of each subcarrier by using the channel coefficient of each subcarrier.

[0039] S210. Acquire resource allocation parameters according to a mathematical optimization problem based on actual channel information. The resource allocation parameters here include: at least two of subcarrier power allocation, relay selection and subcarrier pairing. The mathematical optimization problem here is to use the end-to-end transmission rate optimization principle based on channel information for subcarrier power allocation and relay selection. Mathematical o...

Embodiment 2

[0086] Embodiment 2, resource allocation method. This method is applicable to the OFDM system including the relay network as attached image 3 As shown, the flow of the method is as attached Figure 4 shown.

[0087] image 3 A two-hop multi-relay cooperative OFDM system based on the amplify-and-forward AF protocol is shown. The OFDM system includes: a source node S, K relay nodes namely R 1 to R K and a target node D. The source node S communicates with the destination node D based on OFDM through K relay nodes.

[0088] exist image 3 Among them, there are K channels between the source node S and K relay nodes, there is one channel between the source node S and the destination node D, and there are K channels between the K relay nodes and the destination node D. Therefore, image 3 There are 2K+1 channels in , and it can be set that 2K+1 channels have the same bandwidth, and each channel experiences independent frequency selective fading. Each channel is logically d...

Embodiment 3

[0155] Embodiment 3, resource allocation method. This method is a resource allocation method under the condition that each subcarrier power is allocated equally, that is, a resource allocation method based on equal subcarrier power allocation. The flow of the method is attached Figure 5 shown.

[0156] Figure 5 In S500, acquire actual channel information, that is, acquire channel information of all subcarriers.

[0157] The channel information obtained in S500 is: the equivalent channel gain of each sub-carrier obtained through channel coefficient calculation. The equivalent channel gain of each subcarrier may include: the equivalent channel gain of the subcarrier i between the source node S and the relay node k, that is, the equivalent channel gain α of the first hop subcarrier i i，k，1 , The equivalent channel gain of the subcarrier i between the relay node k and the target node D is the equivalent channel gain α of the second hop subcarrier i i，k，2 , and the equivalent ...

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Abstract

The invention discloses a resource distribution method and a resource distribution device for a multi-relay orthogonal frequency division multiplexing system. The resource distribution method for the multi-relay orthogonal frequency division multiplexing system comprises the following steps: acquiring actual channel information, and acquiring a resource distribution parameter according to actual channel information-based mathematical optimization problem, wherein the resource distribution parameter comprises at least two of subcarrier power distribution, relay selection and subcarrier pairing, and the mathematical optimization problem is set for the subcarrier power distribution, relay selection and subcarrier pairing on the basis of channel information by utilizing end-to-end transmission rate optimization principle; and transmitting signals according to the resource distribution parameter. The technical scheme optimizes the system performance.

Description

technical field [0001] The invention relates to the technical field of wireless network communication, in particular to resource allocation technology in a multi-relay orthogonal frequency division multiplexing system. Background technique [0002] The basic model of the relay network in the wireless communication system is attached figure 1 shown. [0003] figure 1 The shown relay network includes: a source node, a relay node, and a target node. A signal transmission process from the source node to the target node is completed through two time slots. In the first time slot, the source node broadcasts the signal, the relay node and the target node monitor the signal sent by the source node, and the relay node listens to the signal from the source node. After receiving the signal, the signal is decoded first, and the decoded signal is sent to the target node with a certain power in the second time slot, and the target node jointly processes the signals received from the fi...

Claims

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Application Information

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IPC IPC(8): H04W72/08
CPCH04L5/0023H04L5/0007H04L5/006H04L25/022H04W84/047H04B7/026H04W40/12H04W52/42H04L5/0033H04W72/0473H04W40/22H04L5/0064H04W72/0453H04B7/022H04L5/0037
Inventor 陶梅霞李斌沈晖罗毅党文冰牟华王晓炜
Owner HUAWEI TECH CO LTD
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