Determining the Call Admission Region for Real-Time Heterogeneous Applications in Wireless TDMA Networks

The call admission problem for a wireless packet switched network supporting homogeneous applications - such as a cellular voice network - is an old one and has been extensively investigated in the past. The focus of the present article is to investigate the call admission region for a TDMA (wireless) system supporting heterogeneous real-time variable bit rate (VBR) applications with distinct quality of service (QoS) requirements and traffic characteristics. The QoS is defined in terms of a maximum tolerable packet delay and dropping probability; packets may be dropped due to delay violations or channel induced errors. The call acceptance region is investigated in this article under the assumption that each user's per frame resource (slot) requests are communicated to the scheduler (resource allocation authority). The call acceptance region is shaped by the QoS that can be delivered by the up-link scheduling policy. In the beginning of this article, some mechanisms employed to inform ..