采用博弈论的认知无线网络主用户和不可信任次用户的协作策略

马亚燕; 王保云

doi:10.7652/xjtuxb201602011

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采用博弈论的认知无线网络主用户和不可信任次用户的协作策略

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- 采用博弈论的认知无线网络主用户和不可信任次用户的协作策略
- Cooperation Schemes Between the Primary Transmitter and Untrusted Secondary Transmitters in Cognitive Radio Networks Using Game Theory
- 西安交通大学学报 2016年50卷第2期页码：61-67
- 作者机构：
  
  南京邮电大学通信与信息工程学院,南京,210003
- 作者简介：
- 基金信息：
  
  : 2015-05-25。作者简介: 马亚燕(1979—),女,博士生;王保云(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(61271232,61372126);江苏省高校研究生科研创新计划资助项目(CXZZ12_0472)
- DOI：10.7652/xjtuxb201602011
  中图分类号： TN409
- 网络首发：2016-02-10，
  
  纸质出版：2016
- 稿件说明：
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马亚燕, 王保云. 采用博弈论的认知无线网络主用户和不可信任次用户的协作策略[J]. 西安交通大学学报, 2016,50(2):61-67.

Cooperation Schemes Between the Primary Transmitter and Untrusted Secondary Transmitters in Cognitive Radio Networks Using Game Theory[J]. 2016, 50(2): 61-67.
马亚燕, 王保云. 采用博弈论的认知无线网络主用户和不可信任次用户的协作策略[J]. 西安交通大学学报, 2016,50(2):61-67. DOI： 10.7652/xjtuxb201602011.

Cooperation Schemes Between the Primary Transmitter and Untrusted Secondary Transmitters in Cognitive Radio Networks Using Game Theory[J]. 2016, 50(2): 61-67. DOI： 10.7652/xjtuxb201602011.

摘要

针对认知无线网络中不可信任的次用户发送者(ST)会对主链路进行窃听的问题

以将主用户发送者(PT)和ST之间的敌对关系转化为协作关系为目的

提出2种采用博弈论的协作策略:斯塔伯格策略及其改进策略——双层博弈策略。在斯塔伯格策略中

ST工作于半双工模式

和窃听相比

它更希望传送数据

因此PT轮流和每个ST进行斯塔伯格博弈

选择对未被选中的ST(即潜在的窃听者)产生更多干扰的ST一起使用授权频段发送数据。为促进ST之间的竞争

将斯塔伯格策略扩展为双层博弈策略

外层仍是斯塔伯格策略

PT将所有的ST看作一个整体进行博弈; 内层拍卖博弈中

每个ST尽可能提高安全速率来赢得接入授权频段的机会

PT则选择能提供最高安全速率的ST进行合作

因此它能够获得更高的收益。仿真结果表明

在这2种策略作用下

主链路的安全速率分别提高了63%和68%

ST接入授权频段的概率分别为56%和71%。

Abstract

Two cooperation schemes using game theory are proposed to solve the problem that the untrusted secondary transmitters(STs)will eavesdrop on the primary link in cognitive radio networks and to covert the hostile relation between the primary transmitter(PT)and STs into a cooperative one

and they are a Stackelberg scheme and an improved two-layer game.The STs work in half-duplex and prefer to transmit than to eavesdrop in the Stackelberg scheme. Hence

the PT plays the Stackelberg game with each ST

and then selects the ST who creates more interference to the unselected STs(i.e. the potential eavesdroppers)to transmit simultaneously. The Stackelberg scheme is then extended into a two-layer game to facilitate the competition among the STs. The outer framework is still a Stackelberg model and the PT plays game with all the STs as an entity

while the inner has an auction framework in which each ST improves its security rate as much as possible for the access opportunity. The PT will conduct cooperation with the ST having the highest security rate

so that more profit can be obtained. Numerical results show that application of these two proposed schemes results in a significant improvement: the security rate of the two schemes increases by 63% and 68% respectively

and the access opportunity of STs is 56% and 71% respectively.

关键词

Keywords

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