New degradation call admission control for increasing WCDMA system capacity

1. INTRODUCTION The third generation communication system1] is code division multiple access communication system based on spread spectrum technology. Owing to adopt same carrier frequency in all cells, the system capacity is limited by interference between mobiles each other. So quick power control2] is adopted to eliminate “near- far” effect, and strict call admission control3] is adop- ted to guarantee call's quality of service(QoS). Due to adopt quick power control, so we consid…

New degradation call admission control for increasing WCDMA system capacity

Propose a new degradation call admission control(DCAC)scheme, which can be used in wideband code division ultiple access communication system. So-called degradation is that non-real time call has the characteristic of variable bit rate, o decreasing its bit rate can reduce the load of the system, consequently the system can admit new call which should be blocked hen the system is close to full load, therefore new call's access probability increases. This paper brings forward design project nd does system simulation, simulation proves that DCAC can effectively decrease calls' blocking probability and increase the otal number of the on-line users.