Output and delay process analysis for slotted CDMA wirelesscommunication networks with integrated voice/data transmission

摘要

This paper presents the output and delay process analysis ofnintegrated voice/data slotted code division multiple access (CDMA)nnetwork systems with random access protocol for packet radioncommunications. The system model consists of a finite number of users,nand each user can be a source of both voice traffic and data traffic.nThe allocation of codes to voice calls is given priority over that tondata packets, while an admission control, which restricts the maximumnnumber of codes available to voice sources, is considered for voicentraffic so as not to monopolize the resource. Such codes allocatednexclusively to voice calls are called voice codes. In addition, thensystem monitoring can distinguish between silent and talkspurt periodsnof voice sources, so that users with data packets can use the voicencodes for transmission if the voice sources are silent. A discrete-timenMarkov process is used to model the system operation, and an exactnanalysis is presented to derive the moment generating functions of thenprobability distributions for packet departures of both voice and datantraffic and for the data packet delay. For some cases with differentnnumbers of voice codes, numerical results display the correlationncoefficient of the voice and data packet departures and the coefficientnof variation of the data packet delay as well as average performancenmeasures, such as the throughput, the average delay of data packets, andnthe average blocking probability of voice calls