Link-layer salvaging for making routing progress in mobile ad hoc networks
Proceedings of the 6th ACM international symposium on Mobile ad hoc networking and computing
Performance evaluation of MAC transmission power control in wireless sensor networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Maximizing Communication Concurrency via Link-Layer Packet Salvaging in Mobile Ad Hoc Networks
IEEE Transactions on Mobile Computing
Mobility-aware topology control in mobile ad hoc networks
Computer Communications
Fast track article: A cooperative approach for topology control in Wireless Sensor Networks
Pervasive and Mobile Computing
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While most previous studies on mobile ad hoc networks (MANETs) rely on the assumption that nodes are randomly distributed in the network coverage area, this assumption is unlikely to hold, as nodes tend to be cluttered around hot spots like the site of an accident or disaster. We refer to this as a clustered layout. Intuitively, a MANET with the clustered layout may suffer from serious performance degradation due to the excessive collisions in congested hot spots and space underutilization of sparse areas. In this paper, we propose a power-controlled network protocol, called the power-stepped protocol (PSP), that maximizes the spatial utilization of limited channel bandwidth. Using a number of discrete power levels available for the underlying wireless network hardware, PSP finds the appropriate power level for each node in a distributed and a coordinated manner without causing any serious problem at the medium access control and network routing layers. A unique feature of this approach is the use the chosen radio power for both data and control packets, and thus, it requires neither any special mechanism (e.g., a separate control channel) nor frequent power adjustments. Our extensive ns-2-based simulation results have shown the proposed PSP provides excellent performance in terms of packet delivery ratio and delay, as well as the network capacity.