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Bulk data dissemination is a basic building block for enabling software update and reprogramming in wireless sensor networks. The recent structure based approach looks promising for efficient dissemination since it facilitates transmission and sleep scheduling. However, a number of limitations exist in existing structured protocols. In this paper, we propose a correlated core based solution for efficient...
The performance evaluation of wireless sensor network based on passive monitoring restricted by two respects: first, passive monitoring trace is incomplete, because monitors can not capture every transmission in the network. Second, the information directly extracted from trace is insufficient. Performance evaluation always needs some implicit information, e.g., packet reception. To solving the problems...
Data collection is the fundamental and important function in wireless sensor networks. Due to the restriction of node power, how to improve the node's energy efficiency and prolong the network lifetime is an important issue in practical network deployment. In this paper, we propose the RS-LPL - Relative Synchronized Low-Power Listening which uses the relative time synchronization to improve the traditional...
Problems of Wireless Sensor Networks (WSN) caused in the laboratory are predictable, and easy to resolve. While in the deployment and management phases, a number of factors in the environment raise more problems that are difficult to predict or simulation than in laboratory condition. To effective manage and monitor those problems, an effective management mechanism is needed, which analysis the problems...
BitTorrent(BT)-like P2P traffic which occupy main network bandwidth affect other normal network applications badly. This paper presents a triggered dynamic mechanism for BT-like P2P bandwidth management. According to the variety of utilization percentage of egress router input/output cache, this mechanism could estimate the potential network congestion and be triggered to control the BT-like P2P bandwidth...
In wireless sensor network (WSN), sensor node is limited in energy, thus energy efficiency is an important concern in routing protocol design. And some applications in sensor networks have the requirement of timely delivery, real-time also become needed for routing. Directed diffusion (DD) is a data centric dissemination protocol for sensor networks, but DD cannot support time-sensitive traffic nor...
Clustering routing protocols have prominent advantages over flat routing protocols in terms of scalability, which is very useful for wireless mesh network with dense nodes distribution. However, clustering schemes will add large extra overhead in order to select cluster-heads and collect neighbor nodes information during the phase of cluster construction. At present, there exist a lot of excellent...
Dynamic address assignment is a desirable feature for deploying wireless sensor network. Typically, a distributed address assignment mechanism is accomplished by ZigBee alliance, whereas, sensors join a network is unpredictable, it may engender uneven node density, so it is possible that one node exhausts its list of addresses while another node has addresses go unused. Therefore, a preemptive approach...
Different from traditional networks, wireless sensor networks (WSNs) are highly dependent on specific applications and are severely constrained by energy, storage capacity and computing power. To prolong the lifetime of the whole networks, energy awareness is an essential consideration when we design or analyze routing protocols. In this paper, we present a review of recent routing protocols in WSNs...
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