CAJ | 학술논문

为了提高认知无线电系统频谱分配的效率，建立了基于博弈论价格机制频谱分配系统模型，避免了价格因主系统频谱增加而降低的缺陷。该模型利用频谱政策服务器对特定区域的频谱进行统一分配，充分发挥了主系统的先动优势和次用户的后动优势。同时，根据次用户对不同频段的偏好引入差异性的概念，设计了认知无线电的静态博弈算法。该算法在深入分析频谱需求函数、次用户效用函数、主系统成本函数和主系统效用函数的基础上，以最大化主系统和次用户效用为设计目标，验证了纳什均衡点的存在性。仿真结果表明，在主系统对称和非对称2种情况下，所提算法能够有效地改善主系统的频谱利用率，提高主系统和次用户的效用。
위료제고인지무선전계통빈보분배적효솔，건립료기우박혁론개격궤제빈보분배계통모형，피면료개격인주계통빈보증가이강저적결함。해모형이용빈보정책복무기대특정구역적빈보진행통일분배，충분발휘료주계통적선동우세화차용호적후동우세。동시，근거차용호대불동빈단적편호인입차이성적개념，설계료인지무선전적정태박혁산법。해산법재심입분석빈보수구함수、차용호효용함수、주계통성본함수화주계통효용함수적기출상，이최대화주계통화차용호효용위설계목표，험증료납십균형점적존재성。방진결과표명，재주계통대칭화비대칭2충정황하，소제산법능구유효지개선주계통적빈보이용솔，제고주계통화차용호적효용。
A game theoretical framework based on price mechanism is built to improve the efficiency of spectrum allocation in cognitive radio system,which avoids reducing the price with the increase of primary system spectrum.The model performs spectrum allocation for the given area by using the spectrum policy server and takes full advantage of both priority of the primary system and posteriority of the secondary user.Meanwhile,by introducing the concept of difference according to the second-ary user preferences for spectrum,a static game algorithm is proposed in cognitive radio.Based on the in-depth analysis of the function of the spectrum demand,the function of the secondary user utili-ty,the function of the primary system cost and the function of the primary system utility,the algo-rithm is designed to maximize the utility of the primary system and the secondary user,which conse-quently verifies the existence of Nash equilibrium.The simulation results indicate that in both sym-metric and asymmetric primary system cases,the proposed algorithm can improve the spectrum utili-zation of the primary system effectively,as well as the utility of the primary system and the seconda-ry user.