Utility based cross-layer resource allocation in multiuser OFDM-based cognitive radio systems
基于OFDM的多用户认知无线电系统的基于效用函数的跨层资源优化分配

This paper proposed a utility-based cross-layer resource allocation algorithm in multiuser OFDM-based cognitive radio systems, which could not only control the interference to primary users caused by secondary users, but also balance the efficiency and fairness among cognitive users in resource allocation. Simulation shows that the proposed algorithm can obtain the best performance in term of the average rate or utility compared with existing two representative algorithms, and all the users obtain fair resource allocation.