【作者】 关艳峰； 胡爱群；

【Author】 Guan Yanfeng Hu Aiqun Information Science and Engineering School Southeast University 210096

【机构】 东南大学信息科学与工程学院；

【摘要】 本文针对 OFDMA 资源分配提出了一个新的概念：业务分集。业务分集指 MAC 层对同一个用户内的每种业务进行区分,并指定各自的 BER 水平发送。被分离但属于同一个用户的业务在接收端又汇聚起来。论文对功率约束下,采用业务分集时能够获得的理论数据速率进行了理论分析,同时提出了子载波、功率和比特分配方案,其中,与著名的贪婪算法相比,子载波分配采用谦虚算法。仿真结果表明,在特定的业务类型时,业务分集能够在频率分集和多用户分集的基础上进一步提升30%的数据速率。更多还原

【Abstract】 A new concept:traffic diversity is proposed for orthogonal frequency division multiple access(OFDMA) resource allocation.Traffic diversity indicates that the MAC layer separates each kind of traffic from the same user and designates the individual bit error rate(BER)level for transmission at the transmitter side,and then these separate traffics,which belong to the same user,will be aggregated again at the receiver side.The theoretical data rate under the given transmit power is analyzed while taking the traffic diversity into consideration,at the same time, this paper proposes a subcarrier,bit and power allocation algorithm wherein the subcarrier allocation adopts an honesty algorithm compared to the famous greedy algorithm.Simulations show that traffic diversity can further increase the data rate 30 percent under the condition of the given traffic classes based on the frequency and multinser diversity.更多还原