Aggressive packet reservation multiple access using signatures

This paper introduces an aggressive packet reservation multiple access scheme for integrated voice/data services in a TDMA mobile network. This access scheme uses slotted ALOHA with signatures. Different signatures are considered for voice and data in order to distinguish users and resolve collisions. Aggressive reservation is achieved by temporarily interrupting on-going data calls to make room for new talkspurt access requests. By taking advantage of data users tolerance to delay we show that a capacity increase can be achieved by introducing aggressive reservation in favor of voice users. Analytical models for voice users and data users are developed for characterizing message access delay and channel utilization. Numerical results show that system capacity improves while keeping voice packet dropping probability below a certain threshold