Ad Hoc Wireless Networks: Protocols and Systems
Ad Hoc Wireless Networks: Protocols and Systems
High-Speed Wireless ATM and LANs
High-Speed Wireless ATM and LANs
Computer Networks
Infrastructure-Based MAC in Wireless Mobile Ad-Hoc Networks
LCN '02 Proceedings of the 27th Annual IEEE Conference on Local Computer Networks
CSMA/IC: A New Class of Collision-free MAC Protocols for Ad Hoc Wireless Networks
ISCC '03 Proceedings of the Eighth IEEE International Symposium on Computers and Communications
SYN-MAC: a distributed medium access control protocol for synchronized wireless networks
Mobile Networks and Applications
A dynamic ID management protocol for CSMA/IC in ad hoc networks
Ad Hoc Networks
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In this paper, we present a new Medium Access Control (MAC) protocol Carrier Sense Medium Access/ID Countdown (CSMA/IC) for multihop ad hoc wireless networks that differs from CSMA/CA. CSMA/IC can achieve virtually 100% collision-free performance by solving the 'hidden terminal' problem and concurrent sending problem, when there are no obstructions. Furthermore, it can enable different packets with different priorities to access the medium and thus achieving QoS goals. To facilitate the functionality of CSMA/IC, we further propose an effective fairness mechanism and automatic distributed ID claiming mechanism. With our fairness mechanism, a Mobile Terminal (MT) would have bounded delay and does not suffer starvation. With the proposed ID assignment mechanism, the length of the required medium competition period before data transmission is greatly decreased. This leads to further improvement in network throughput, especially in high-speed wireless networks. We also show that CSMA/IC has pronounced performance advantage over existing protocols for broadcast data communications.