Performance analysis of an integrated voice and data CDMA system

✍ Scribed by Takeshi Sato; Abbas Sandouk; Takaya Yamazato; Masaaki Katayama; Akira Ogawa

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 266 KB
• Volume: 83
• Category: Article
• ISSN: 8756-663X
• DOI: 10.1002/(sici)1520-6432(200004)83:4<61::aid-ecjb7>3.0.co;2-u

✦ Synopsis

This research is an analysis of the mixed system of data packets and CDMA voice signals transmitted by the channel load sensing protocol. The voice signal is a medium requiring instantaneous action to complete the transmission within a certain time whereas the data packet is a medium requiring high reliability but allows temporal delay. The blocking probability and Erlang capacity are derived for the voice signal while the throughput is derived for the data packet. The characteristics in the system using CDMA strongly depend on the number of simultaneously transmitting stations. In particular, in the present system, due to the mixture of different media, the effect of traffic on each medium needs to be considered. In regard to this point, this paper analyzes the effect of traffic on each medium from the relationship of the required quality of the media and the number of simultaneously transmitting stations. Then the optimization of the system with two kinds of media is considered. Further, the system capacity is derived as a guideline for the system optimization. The data offered load is derived to make maximally efficient use of the channel.