PMCAP/CDMA协议在语音与数据混合业务中的应用研究  

PERFORMANCE ANALYSIS AND APPLICATION OF PMCAP/CDMA PROTOCOL IN VOICE/DATA INTEGRATION NETWORKS

作　　者：焦文华[1] 梁庆林[1] 

机构地区：[1]北京大学电子学系,北京100871

出　　处：《电子与信息学报》2002年第12期1808-1814,共7页Journal of Electronics & Information Technology

摘　　要：该文将CDMA移动通信系统上行信道中的一种MAC协议PMCAP/CDMA协议应用到语音与数据混合业务的情况,对协议建立数学模型,并对性能进行了理论计算和仿真。为了保证对语音请求的优先分配,将PN码集分为语音可用码集,数据可用码集及语音与数据的预约码集。提出了新的动态码集分配方案。仿真表明,该方案较固定码集方案更好地提高了系统的综合性能,而负指数码字分配方案提供了语音与数据性能的很好折衷。An MAC protocol named PMCAP/CDMA is introduced and utilized in voice/data integration network for uplink channel of CDMA mobile communication systems. Mathematical model is built and performance analysis is conducted. Three code sets for voice contention, data contention and voice/data reservation are adopted so that there are no contentions between voice and data users. Two adaptive code-set-assign methods are proposed. Simulation shows, compared with fixed assigned method, adaptive method can greatly improve the system performance. And the second adaptive code-set-assign method is a good trade off between voice drop rate and data delay.

关 键 词：PMCAP/CDMA协议 语音 数据 混合业务 性能分析 无线分组网络 

分 类 号：TN929.5[电子电信—通信与信息系统]