Security Coalition Method Based on Game Theory
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摘要: 針對(duì)缺乏有效聯(lián)盟收益分配機(jī)制,導(dǎo)致發(fā)送端拒絕協(xié)作,同時(shí)發(fā)送信號(hào),造成接收端信號(hào)重疊,該文提出一種基于博弈的安全聯(lián)盟組網(wǎng)方法。首先,將協(xié)作博弈機(jī)制中的收益分?jǐn)倷C(jī)制引入安全聯(lián)盟組網(wǎng)自適應(yīng)形成方法,建立發(fā)送端聯(lián)盟組網(wǎng)模型。然后,為實(shí)現(xiàn)聯(lián)盟方式組網(wǎng),基于博弈方法將聯(lián)盟組網(wǎng)相比非聯(lián)盟時(shí)增加的總安全速率作為可轉(zhuǎn)移的收益函數(shù),平均分配給組網(wǎng)內(nèi)各個(gè)發(fā)送端;之后,發(fā)送端遍歷所有可能形成的聯(lián)盟組網(wǎng),得到均攤收益最大的聯(lián)盟組網(wǎng)方式;最后,發(fā)送端自適應(yīng)形成該聯(lián)盟組網(wǎng),無(wú)需發(fā)送信號(hào)或相同需求下竊聽信道條件最壞的發(fā)送端發(fā)信號(hào),其余所有發(fā)送端通過(guò)發(fā)送人工噪聲進(jìn)行協(xié)作。仿真分析驗(yàn)證了該方法的公平性和有效性,當(dāng)發(fā)送端功率等于20 mW時(shí),高斯信道下的網(wǎng)絡(luò)平均安全速率相比初始狀態(tài)提高1.8 。
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關(guān)鍵詞:
- 無(wú)線通信 /
- 安全速率 /
- 合作博弈 /
- 人工噪聲 /
- 聯(lián)盟組網(wǎng)
Abstract: For the problems of reduced secrecy rate and energy according to noncooperation of selfish relay, this paper presents a security coalition method based on the game theory. Firstly, this paper introduces a benefit-sharing mechanism of cooperative game for the adaptive security coalition method, and models the transmitter coalition. And then this paper makes the increased part of total network secrecy rate compared with the initial as the transferable benefit, and allocates it to all transmitters in the coalition. After that, the transmitters iterate through the average utility under all coalitions, and find the largest benefit coalition. Finally, this coalition of transmitters is formed autonomously, the transmitter which is badly in need of sending signal or the transmitter with the worst eavesdropping channel conditions under the same need sends signal, the rest cooperate by sending artificial noise. Simulations and analyses show the fairness and effectiveness of this method, when sending power is 20 mW, the average network secrecy rate under the Gaussian channel compared with the initial stated is improved by 1.8 .-
Key words:
- Wireless communication /
- Secrecy rate /
- Cooperative game /
- Artificial noise /
- Coalition group
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