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Data transmission is the most important issue in wireless sensor network (WSN). The energy consumption and latency are the key factors of data transmission. To optimize these factors, a noble data aggregation algorithm is proposed in this paper. The proposed algorithm is originated from LEACH, and energy efficiency and latency is considered as the researching parameters. The overlap of detect regions...
Wireless communication channel and limited communication resource lead MAC protocol to be one of pivotal issue in wireless sensor networks. Focus on energy efficiency and avoidance of packets collision, a power controlled MAC that is named cross-layer power alternative MAC (CLPA-MAC) is proposed. In CLPA-MAC, nodes send packets with tow different transmission power levels instead of one fixed value...
In wireless sensor networks (WSNs), a challenging problem is how to advance network QoS. Energy-efficiency, network communication traffic and failure-tolerance, these important factors of QoS are closely related with the applied performance of WSNs. Hence a QoS-aware routing protocol called directed alternative spanning tree (DAST) is proposed to balance the above three factors of QoS. A directed...
Because of the manner of wireless communication channel and limited communication resource, research of MAC protocol is one of challenging issues in Wireless Sensor Network (WSN). S-MAC is a representative MAC protocol for Wireless Sensor Network, but its energy strategy is still not perfect. Focus on energy efficiency, a new S-MAC based protocol that is called Packets Decision MAC (PD-MAC) is proposed...
In wireless sensor networks (WSNs), lifetime and failure-tolerance seem to be a part of contradiction. The traditional spanning tree mostly focuses on network lifetime, and use data-aggregation to save network energy. In order to keep the whole network available during nodes failure, a routing protocol that is called balanced-alternative spanning tree (BAST) is proposed. This routing protocol has...
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