Contention-Free Distributed Dynamic Reservation MAC Protocol with Deterministic Scheduling (C-FD3R MAC) for Wireless ATM Networks
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초록
This paper proposes a novel MAC protocol for Wireless ATM networks, which is characterized by a contentionfree mechanism of the reservation request and a deterministic nature of mobile-assisted (distributed) uplink scheduling under a framework of dynamic reservation TDMA as discussed in the current standardization activities of ETSI broadband radio access network (BRAN). The design objective of the proposed MAC protocol is to guarantee the real-time constraint of rt-VBR traffic class while maximizing the multiplexing gain among all ATM traffic classes, especially with a fixed length frame. Simulation experiments using statistically multiplexed MPEG-2 video streams are performed for a 25 Mbps wireless ATM access link scenario. It has been shown that the proposed framework guarantees the delay constraint of rt-VBR sessions along with its cell loss performance significantly reduced while improving the average delay performance of the nrt-VBR in the range of 10~30% without compromising the channel utilization as compared to the DSA++ system.
Abstract
This paper proposes a novel MAC protocol for Wireless ATM networks, which is characterized by a contentionfree mechanism of the reservation request and a deterministic nature of mobile-assisted (distributed) uplink scheduling under a framework of dynamic reservation TDMA as discussed in the current standardization activities of ETSI broadband radio access network (BRAN). The design objective of the proposed MAC protocol is to guarantee the real-time constraint of rt-VBR traffic class while maximizing the multiplexing gain among all ATM traffic classes, especially with a fixed length frame. Simulation experiments using statistically multiplexed MPEG-2 video streams are performed for a 25 Mbps wireless ATM access link scenario. It has been shown that the proposed framework guarantees the delay constraint of rt-VBR sessions along with its cell loss performance significantly reduced while improving the average delay performance of the nrt-VBR in the range of 10~30% without compromising the channel utilization as compared to the DSA++ system.