基于聯(lián)盟博弈的多小區(qū)下行鏈路保密協(xié)作算法
doi: 10.11999/JEIT160969
基金項(xiàng)目:
國(guó)家863計(jì)劃項(xiàng)目(SS2015AA011306)，國(guó)家自然科學(xué)基金(61379006)
Coalition Game Based Secrecy Downlink Cooperation Algorithm in Multi-cell Networks
Funds:
The National 863 Program of China (SS2015AA 011306), The National Natural Science Foundation of China (61379006)
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摘要: 考慮一個(gè)存在多竊聽者的多小區(qū)下行鏈路蜂窩網(wǎng)絡(luò)，協(xié)作小區(qū)通過(guò)在選定的子載波上執(zhí)行協(xié)作波束賦形，利用小區(qū)間干擾抑制竊聽者，實(shí)現(xiàn)安全傳輸。在竊聽者位置未知的情況下，推導(dǎo)了下行鏈路保密連接概率的閉式表達(dá)式。在此基礎(chǔ)上，將下行鏈路建模為博弈參與者，該文提出一種基于聯(lián)盟博弈的多小區(qū)下行鏈路保密協(xié)作算法，以保密連接概率為效用函數(shù)，通過(guò)設(shè)計(jì)聯(lián)盟加入和退出規(guī)則，實(shí)現(xiàn)了下行鏈路對(duì)子載波的高效選擇和保密協(xié)作聯(lián)盟的自組織生成。理論和仿真分析表明所提算法能夠形成穩(wěn)定的聯(lián)盟結(jié)構(gòu)，并且所提算法的保密性能優(yōu)于傳統(tǒng)的聯(lián)盟協(xié)作算法。
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關(guān)鍵詞:
- 無(wú)線通信 /
- 物理層安全 /
- 聯(lián)盟博弈 /
- 多小區(qū)協(xié)作
Abstract: This paper studies physical layer security of the multi-cell cellular networks, where the base stations need to perform cooperation beamforming in selected subcarriers to secure the downlink communication, and eavesdroppers with random location are interfered by inter-cell interference. Firstly, the approximation for the secrecy connection probability with uncertained locations of eavesdroppers is obtained. Then a distributed coalition game based cooperation algorithm is proposed to maximize the secrecy connection probability of downlinks. Specifically, the downlink is modeled as game player, whose payoff is the secrecy connection probability in the selected coalition, the join and quit rules of coalitions are designed to make downlinks self-organizing form cooperative coalition and achieve the effective subcarrier allocation. Moreover, the convergence of the proposed coalition formation game is proved, theoretical analysis and simulation results show that the proposed algorithm can form a stable coalitional structure and results in a notable secure performance advantage relative to the traditional cooperation algorithms. -
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