由于认知无线电（CR）网络具有频谱动态性、频谱差异性以及频谱多样性等特点,传统的组播路由策略已不再适合于CR网络,CR组播路由面临新的挑战。结合博弈论知识建立了频谱分配模型并得出了最优的纳什均衡解,详细介绍了基于时延约束的CR的组播路由协议并对其进行了分析,最后指出其进一步的研究方向。%In light of the characteristics of CR with dynamic spectrum, spectrum differences and diver- sity of the spectrum, the traditional multicast strate-gy can not fit for CR any more. Therefore multicast in CR is confronted with new challenges. According to game theory, the model of spectrum allocation was established and Nash equilibrium was figured out. Then CR muhicast routing protocol based on the delay-constrained was introduced and analyzed in detail. Finally the research directions of CR multicast were pointed out.
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