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Performance of a deployed Wireless Sensor Network (WSN) is greatly influenced by the interference it is subject to during operation. Degradation happens due to interference resulting in packet drops, retransmissions, link instability and inconsistent protocol behavior. We have conducted experiments that highlight the fact that interference caused by WiFi and co-channel contention significantly degrades...
Wireless sensor networks are increasingly used for remote monitoring, fire detection and emergency response. Such networks are equipped with small devices powered by batteries and designed to be operated for years. They are often based on the IEEE 802.15.4 standard which defines low power and low data rate protocols. One of the drawbacks of this kind of wireless sensor networks is their need of long...
The connection interface of the traditional wireless sensor network device is so single that the communication ability is limited. Further more, it needs to keep the network work stability while transmitting a large number of data. In order to solve these problems, this paper designs a new universal platform and makes optimization on it. It provides some rich interface features to expand the wireless...
The effective coverage range is one of the QoS criterions in wireless sensor network. In practical engineering, the key problem to be solved is how to achieve the effective coverage to enhance performance and lifetime of the whole network. In view of the poor performance of effective coverage in Existing ZigBee networks, the paper analysed the factors of impacting on the coverage capability, including...
The effective coverage range is one of the QoS criterions in wireless sensor network. In practical engineering, the key problem to be solved is how to achieve the effective coverage to enhance performance and lifetime of the whole network. In view of the poor performance of effective coverage in existing ZigBee networks, the paper analysed the factors of impacting on the coverage capability, including...
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