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We propose a joint routing and medium access control (MAC) protocol, named as JRAM, for reducing transmission delays in a many-to-one communication paradigm for wireless sensor networks (WSNs). Due to the wide variety of WSN applications, there is a need for protocol solutions optimized for specific application classes. JRAM is proposed for WSNs deployed for monitoring multiple events in the same...
This paper addresses routing in networks with both delay-sensitive (class 1) and delay-insensitive (class 0) traffic where the class 1 traffic is to be delivered with bounded delay and the delay of class 0 traffic is to be minimized subject to this constraint. This delay-constrained routing, with constraints on the overall mean delay of class 1 traffic, is shown to be NP-hard with an M/M/1 link model...
Rateless Codes can reduce the costs of retransmissions over erasure channels. It has been shown in the literature that having a systematic part in a rateless codes enhances its performance. This paper proposes an extended systematic rateless encoding scheme to improve performance. The scheme is easy to analyze and implement. We also study several fixed and opportunistic routing protocols for a network...
Unlike fixed path routing, Opportunistic Routing (OR) in wireless networks can use alternate links/routes which have low success rates but are still occasionally capable of successful transmission. This paper extends standard unicast OR protocols to support multicast transmissions in a wireless network. The proposed multicast OR (MC-OR) protocol generates multiple multicast trees to serve multiple...
For wireless ad hoc networks with nodes having limited battery capacity, we propose route selection based on maximizing the minimum node battery power and minimizing the total transmission power required to reach the destination. The lifetime of the selected routes should also be long enough to sustain the data transmission, if possible. This motivates the design of a Location-Aided Power and Mobility...
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