Abstract
Abstract The future of broadband and wireless communications is expected to support multimedia services. In order to provide efficient performance in the wireless networks, wireless ATM (WATM) is suitable to be the framework. With an appropriate medium access control (MAC) protocol, WATM can support multimedia service efficiently and guarantee their QoS requirements. Due to the limited wireless bandwidth problem in the wireless environment, an efficient wireless ATM MAC protocol is needed. In this thesis, a new MAC protocol, named CRPMA/DS, is proposed to support various ATM services, such as CBR, VBR, ABR and UBR. Combination of Reservation and Polling Multiple Access with Distributed Scheduling (CRPMA/DS) is based on a distributed scheduling architecture to access the shared wireless bandwidth. Thus, each mobile terminal (MT) can handle its connections more efficiently according to its requirements. CRPMA/DS also uses a combination scheme with proposed splitting algorithm to solve the request collision and VBR bursty problems. We simulate our proposed MAC protocol and compare its performance with DTDMA/PR and PRMA/DA. The simulation results show that CRPMA/DS has higher throughput of data traffic (ABR and UBR traffic) and still guarantees the QoS of CBR and VBR traffic. With the splitting algorithm, CRPMA/DS also provides a low collision probability when the MTs send their requests in the reservation period.