Achievable QoS in a shared wireless channel

In this work, call admission and transmis sion scheduling policies are studied for a TDMA system servicing Variable Bit Rate (VBR) applications with distinct QoS requirements and traf fic characteristics. In this environment. packets which experience excess delays are dropped (due to delay violations) at the source. In addition, packets are dropped at the receiver due to channel induced errors (interference) in the wireless link. The focus of the research is to determine the region of achievable QoS vectors for heterogeneous VBR applications in this shared resource environment and study the impact that channel quality has on the achievable performance. The region of achievable QoS vectors is central to the call admission problem and in this work, it is used to identify a class of scheduling policies capable of delivering any achievable performance.