Analysis of a simple protocol for short message data service in an integrated voice/data CDMA system

In a mobile cellular CDMA system, the transmissions of the users are power controlled such that their received energies at the base station are approximately equal. This is done with a desire to maximize the capacity of such systems, and further, stability is maintained by limiting the arrival rates of users into the system. This paper analyzes a simple protocol for transmission of short data messages in an integrated voice/data wireless DS-CDMA network. Voice calls are given preemptive priority over data calls and the protocol for data calls is controlled by the QoS (quality of service) requirement for the voice calls. Imperfections in power control for such CDMA systems are included while studying the effect of the protocol on average performance measures like throughput, blocking probability and delay for the short message data service.