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In underwater acoustic sensor networks, sensors are usually deployed for sensing task, and the sensed data is able to be transmitted in a direct or multi-hop relaying manner to the sink in a single-hop topology. Considering the energy consumption model, the signal transmitted in a longer range will cost much energy than that in a shorter range. Therefore, three transmission types, sink-to-nodes, node-to-node,...
A kind of hidden terminal problem, called the POINT problem, which is caused by the expansion of the interference range of the receiver due to the controlled transmission power of the sender, is deemed a notorious problem in wireless ad hoc networks. This paper utilizes physical and virtual carrier-sensing schemes to avoid the POINT problem. We analyze the relationships among the transmission range,...
The paper proposes a protocol to adjust the vulnerable path by using mobile sensor networks. The objective of vulnerable adjustment is to protect some important areas, named TBP (to-be-protected) areas in the paper, from being attacked. In the paper, Voronoi diagram is utilized to And a vulnerable path, which is a path that an intruder may pass through. While the vulnerable path passes over a TBP...
The paper proposes a multi-rate supported power control, named MRPC, MAC protocol to avoid the LIRC (Large Interference Range Collision) problem for wireless ad hoc networks. The main concept of the MRPC protocol is to protect the current reception by means of the carrier-sensing range of the previous transmission to cover the induced interference range of the current reception. Based on the concept,...
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