CAJ | 학술논문

当具备不同利益的多个主网络竞争为单个次级网络提供频谱接入机会时，它们可以通过基于重复博弈模型的频谱共享机制实现对授权通信频段的合作垄断，从而最大化它们的整体数据传输效用。然而当某个主网络对未来传输效用不够重视时，它会为了获得比垄断效用更高的传输效用而偏离当前的合作垄断，从而降低了其他主网络的当前和未来数据传输效用。为此，2种新的频谱共享策略被提出以促使所有主网络形成更为灵活和可靠的频谱共享合作垄断。数值仿真表明，相比现有的触发策略，这2种新策略能够为所有主网络获得更优的整体数据传输效用。
당구비불동이익적다개주망락경쟁위단개차급망락제공빈보접입궤회시，타문가이통과기우중복박혁모형적빈보공향궤제실현대수권통신빈단적합작롱단，종이최대화타문적정체수거전수효용。연이당모개주망락대미래전수효용불구중시시，타회위료획득비롱단효용경고적전수효용이편리당전적합작롱단，종이강저료기타주망락적당전화미래수거전수효용。위차，2충신적빈보공향책략피제출이촉사소유주망락형성경위령활화가고적빈보공향합작롱단。수치방진표명，상비현유적촉발책략，저2충신책략능구위소유주망락획득경우적정체수거전수효용。
When multiple primary network (PN) with different interests competes to offer spectrum access opportunities for a single secondary network, a spectrum sharing scheme based on a repeated game model could be adopted to form a colluded monopoly for the licensed spectrum so as to maximize their total transmission utility. However, when a does not value its future transmission utility enough, it might choose to deviate from the present colluded monopoly to obtain a transmission utility larger than its monopoly utility, which then reduces the current and future transmission utilities of all other PN. Two new strategies were thereby proposed to produce a more flexible and credible spectrum sharing monopoly among all PN. Numerical simulation shows that, compared with the existing triggering strategy, the proposed strategies can effectively increase the overall transmission utility of all PN.