認(rèn)知無(wú)線網(wǎng)中一種基于博弈論的低復(fù)雜度聯(lián)合資源共享機(jī)制
doi: 10.11999/JEIT140326 cstr: 32379.14.JEIT140326
基金項(xiàng)目:
電子信息系統(tǒng)復(fù)雜電磁環(huán)境效應(yīng)國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題和清華大學(xué)電子工程系傳信研究基金資助課題
A Mechanism for Low-complexity Joint Resources Sharing Based on Game Theory in Cognitive Radio Networks
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摘要: 在一類典型的認(rèn)知無(wú)線網(wǎng)絡(luò)中，多個(gè)次級(jí)用戶通過(guò)支付費(fèi)用競(jìng)爭(zhēng)租用主用戶授權(quán)頻帶的子帶來(lái)傳輸信息。該文針對(duì)此類系統(tǒng)通過(guò)博弈論方法聯(lián)合優(yōu)化次級(jí)用戶的發(fā)射功率和子帶分配，及主用戶的定價(jià)系數(shù)，同時(shí)最大化主用戶和次級(jí)用戶的收益。具體而言，該文基于逆向歸納法，將博弈問(wèn)題分解為功率控制、子帶分配和價(jià)格調(diào)整等3個(gè)耦合的子問(wèn)題，并逐一求解，從而得到整個(gè)博弈的子博弈精煉納什均衡。最后，該文基于理論分析結(jié)果，提出一種博弈均衡求解算法。仿真結(jié)果驗(yàn)證了該文的理論推導(dǎo)結(jié)果和該算法的有效性。
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關(guān)鍵詞:
- 認(rèn)知無(wú)線電(CR) /
- 動(dòng)態(tài)完全信息博弈 /
- 子帶分配 /
- 功率控制
Abstract: In a typical cognitive wireless network, multiple secondary users compete to rent for the sub-bands in the authorized spectrum of primary users to transfer data. This paper focuses on simultaneously maximizing the payoff of both primary users and secondary users by jointly optimizing transmit powers of secondary users, sub-band allocation of secondary users, and pricing coefficients of primary users. Specifically, based on backwards induction, this paper decomposes the whole game into three sub optimization problems, i.e., power control problem, sub-band allocation problem, and price adjustment problem. These problems are then solved one by one to obtain the sub-game perfect Nash equilibrium of the whole game. Finally, this paper proposes an algorithm to search for Nash equilibrium. Simulation results verify the theoretical deduction results and effectiveness of the proposed algorithm. -
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