基于优先级的语音/数据业务联合功率和速率控制

Priority-based Combined Power and Rate Control for Integrated Voice and Data Traffic

针对综合语音和数据系统的上行链路,提出了一种基于语音业务优先级的联合功率和数据速率控制算法。该算法在进行资源分配时考虑了语音业务的实时性,给予语音用户更高的优先级,并且在保证语音业务通信质量的前提下,最大化数据业务的吞吐率。仿真表明,在轻负荷环境下,本文算法与不区分优先级的联合功率和速率算法性能相当;而在重负荷环境下,本文算法比不区分优先级的联合功率和速率算法综合性能更好。当系统达到平衡状态时,由于本文方法使语音用户和数据用户的平均发射功率分别降低了43%和68%,语音用户的中断概率降低了30%,而数据用户的平均速率减少9%,所以在数据业务的吞吐率和语音业务的中断概率以及用户的平均发射功率之间取得较好的折衷。

A priority-based combined power and rate control （PBCPRC） algorithm is proposed for the uplink of a cellular system with integrated voice and data traffic. When allocating system resources, on the basis of the real-time characteristics of voice service, all voice users are assigned higher priority. At the same time, the algorithm maximizes the throughput of data service provided that the quality of voice service is ensured. Simulation results demonstrate that under heavy load, the proposed algorithm can provide better performance than the non-priority CPRC. Since the average transmission power of the voice users and the data users are reduced by 43% and 68% respectively, the outage probability of the voice users are decreased by 30% and the average data rate of the data users are reduced by 9 %, the proposed algorithm gives a better trade-off between the through- put of data service and the outage probability of voice service.