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Spectrum allocation method for multi-hop cognitive wireless network

A cognitive wireless network and spectrum allocation technology, applied in the field of wireless communication, can solve the problems of not considering the power constraints of the communication system or nodes, and not considering how to divide the spectrum, so as to reduce the probability of interruption and ensure the effect of reliability

Inactive Publication Date: 2017-02-15
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has certain adaptability to the scene of uneven distribution of users. The disadvantage of this invention is that it does not consider the power constraints of the communication system or nodes, nor does it consider the problem of how to divide the spectrum.

Method used

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  • Spectrum allocation method for multi-hop cognitive wireless network
  • Spectrum allocation method for multi-hop cognitive wireless network
  • Spectrum allocation method for multi-hop cognitive wireless network

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] see figure 1 , to provide a multi-hop cognitive wireless network spectrum allocation method for Embodiment 1 of the present invention, which is applied to an OFDM relay link containing a source node, a relay node, and a destination node, and each frame is divided into two time periods with equal time periods In the first time slot, the source node sends data to the relay node, and in the second time slot, the relay node decodes the received data and forwards it to the destination node. The method includes the following steps.

[0049] Step S101, respectively establish non-cooperative game models of the two time slots according to characteristic information of wireless network links.

[0050] The non-cooperative game models of the first time slot and the second time slot are respectively:

[0051]

[0052]

[0053] Among them, {n}={1,2,…,N} is the finite set of subcarriers participating in the game on the channel, is the transmit power policy set of the i-th ...

Embodiment 2

[0066] see figure 2 , is a multi-hop cognitive wireless network spectrum allocation method provided by Embodiment 2 of the present invention, which is applied to an OFDM relay link containing a source node, a relay node and a destination node, and each frame is divided into two equal time periods Time slots, in the first time slot, the source node sends data to the relay node, in the second time slot, the relay node decodes the received data and forwards it to the destination node, so Said method includes the following steps.

[0067] Step S201, respectively establish non-cooperative game models of the two time slots according to characteristic information of wireless network links.

[0068] In this embodiment, considering the constraints of the total transmission power of the source node S and the relay node R, referring to the derivation principle of Embodiment 1, the corresponding energy efficiency function of this embodiment can be expressed as:

[0069]

[0070] The...

Embodiment 3

[0083] see image 3 , is a multi-hop cognitive wireless network spectrum allocation method provided by Embodiment 3 of the present invention, which is applied to an OFDM relay link containing a source node, a relay node and a destination node, and each frame is divided into two equal time periods Time slots, in the first time slot, the source node sends data to the relay node, in the second time slot, the relay node decodes the received data and forwards it to the destination node, so Said method includes the following steps.

[0084] Step S301, respectively establish non-cooperative game models of the two time slots according to characteristic information of wireless network links.

[0085] In this embodiment, considering the respective transmission power constraints of the source node S and the relay node R, referring to the derivation principle of Embodiment 1, the corresponding energy efficiency function of this embodiment can be expressed as:

[0086]

[0087] The co...

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Abstract

The invention discloses a spectrum allocation method for a multi-hop cognitive wireless network. The spectrum allocation method is applied to an OFDM (Orthogonal Frequency Division Multiplexing) relay link including a source node, a relay node and a destination node, and each frame is partitioned into two slots with equal periods. The method comprises the following steps: establishing two non-cooperative game models of the two slots respectively according to feature information of a wireless network link; calculating optimal solutions of the non-cooperative game models under an unconstrained condition, namely, an unconstrained optimal user communication rate vector and an unconstrained optimal total transmission power allocation vector; and confirming and outputting an optimal user communication rate vector and an optimal power allocation vector according to the optimal solutions, a user communication rate, and total transmission power of the source node and the relay node or a corresponding relationship between constraint conditions of respective transmission power of the source node and the relay node. Through adoption of the spectrum allocation method, resources can be allocated adaptively under the condition of satisfying various constraint conditions, and a global optimal solution is obtained. Meanwhile, the link transmission reliability can be ensured, and the link interrupt probability and the algorithm implementation complexity are lowered.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a multi-hop cognitive wireless network frequency spectrum allocation method. Background technique [0002] With the rapid development of wireless communication technology, the wireless communication network has the trend of increasing bandwidth, diversifying services, and network heterogeneity. The effective use of spectrum resources has become a very important and urgent problem to be solved. As a new type of communication technology, cognitive radio can perceive the surrounding radio environment, and through intelligent learning, it can adaptively change its parameters such as carrier frequency, transmission power and modulation technology, thereby improving spectrum utilization. Multi-hop cognitive wireless network can expand the coverage of communication network, has the advantages of improving network throughput, enhancing link transmission reliability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04W72/0473H04W72/52H04W72/53Y02D30/70
Inventor 刘觉夫王建旭黄德昌王作航刘斌杨亚辉李波林伟龙李小俊
Owner EAST CHINA JIAOTONG UNIVERSITY