A delay bounded approach for streaming services in CDMA cellular networks

• Authors: Yaser Khamayseh;Ehab S. Elmallah
• Venue: Proceedings of the 1st ACM international workshop on Quality of service & security in wireless and mobile networks
• Year: 2005

This paper considers the design of resource management schemes for cellular networks where mobile users are interested in receiving streaming media flows, and the cell utilizes a Discrete Sequence Code Division Multiple Access (DS-CDMA) air interface. Due to the relatively high data rate requirement of the streaming service, and the limiting effect of the multiple access interference (MAI) in CDMA networks, the cell may undergo overload conditions as the wireless channel path losses increase for any subset of users. In response, the base station is expected to delay, or perhaps forcibly terminate, some traffic streams.To achieve acceptable performance, we examine the use of a novel admission control scheme that takes user mobility into consideration. The utilized scheme admits a traffic stream only if the estimated cell overload probability after a prescribed prediction interval does not exceed a specified threshold value. As well, we devise a packet scheduling algorithm that aims at minimizing the number of forced terminations of connections that exceed specified delay bounds. Performance of the proposed admission control scheme in conjunction with the devised scheduling procedure is analyzed using simulation. The obtained results show significant improvement of using the proposed methods over methods that don't take user mobility into account.