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In wireless sensor networks, ??holes?? are hardly to know its location and avoid either because of various actual geographical environments. A hole can be dynamically formed due to unbalanced deployment, failure or power exhaustion of sensors, animus interference, or physical barriers such as buildings or mountains. Hence, we hope to propose the RNG Hole Avoiding Routing protocol, RNGHAR which can...
Wireless sensor networks can improve the efficiency for collecting information in underwater environments. In the past, researchers collected data under the sea by the way of both sending oceanographic equipments into water and recovering it at the end of mission. The whole process often took long time so real-time services cannot be supported. Wireless sensor networks can detect events and transmit...
The dead-end situation (which is also known as ldquolocal maximumrdquo) is a fundamental problem when performing geographic forwarding in mobile adhoc networks. When a packet encounters a dead end, an additional overhead must be paid to route the packet around the dead end. This paper presents a scheme that decreases the risk of a data packet encountering a dead-end situation as it is forwarded to...
A route between the sensors and the sink in opportunistic sensor networks may have never existed. Traditional routing protocols cannot be directly applied to deal with the disconnection problem. This paper develops a mobile relay infrastructure approach to supporting data delivery in opportunistic sensor networks. Mobile relays cooperate to establish a routing infrastructure by modifying their trajectories...
As the need for applying wireless sensors to military and civil applications increases, the design of a routing protocol with fault tolerance becomes an important issue in wireless sensor networks. Previously proposed approaches were only concentrated on crash (or power) failures. This paper describes a routing scheme that not only handles crash failures but patterned faults and data processing errors...
The energy efficiency is a substantial key design issues in such networks. An efficient routing protocol is critical to prolong the life of sensor nodes. This work presents a hierarchical multiple-choice routing path protocol (HMRP) for wireless sensor networks. According to HMRP, the wireless sensor network is initially constructed as a layered network. Based on the layered network, sensor nodes...
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