Low-cost and low-power sensor nodes forming Wireless Sensor Networks have become suitable for a wide range of applications during recent years. These networks demand the implementation of energy-aware techniques and l...
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ISBN:
(纸本)9780769528892
Low-cost and low-power sensor nodes forming Wireless Sensor Networks have become suitable for a wide range of applications during recent years. These networks demand the implementation of energy-aware techniques and low complexity protocols in all layers. Recently, a MIMO - based structure has been proposed to offer enhanced energy savings in WSNs, compared with simple SISO transmission. In this paper we consider the most common transmission structure for WSNs, using multiple hops. We examine and compare MIMO - based WSN with a multihop transmission in terms of energy efficiency. The results mainly depend on the channel conditions and the distance to the destination node. We reach analytical expressions to calculate threshold values of these parameters, which determine the areas where the MIMO - based structure outperforms multihop transmission.
Low-cost and low-power sensor nodes forming Wireless Sensor Networks (WSNs) have become suitable for a wide range of applications during recent years. These networks, due to their special functional characteristics, d...
详细信息
ISBN:
(纸本)9781424426430
Low-cost and low-power sensor nodes forming Wireless Sensor Networks (WSNs) have become suitable for a wide range of applications during recent years. These networks, due to their special functional characteristics, demand the implementation of energy-aware techniques in all layers. Recently a MIMO based structure has been proposed to offer enhanced energy savings in WSNs under certain circumstances. Based on that idea several alternatives have been examined, mainly focusing on 2x2 MEMO systems. In this paper, we summarize two MIMO schemes and compare their performance in terms of energy efficiency. Moreover, we investigate more complex NUM systems, emphasizing on 4x4 structures, and prove that depending on the scenario, such systems may offer remarkable energy gains.
Recently, coordinated multiple-point transmission (CoMP) is one of important techniques needed to minimize intercell interference (ICI). In general, the transmission in CoMP - joint processing transmission (CoMP-JPT) ...
详细信息
Low-cost and low-power sensor nodes forming Wireless Sensor Networks (WSNs) have become suitable for a wide range of applications during recent years. These networks, due to their special functional characteristics, d...
详细信息
ISBN:
(纸本)9781424403523
Low-cost and low-power sensor nodes forming Wireless Sensor Networks (WSNs) have become suitable for a wide range of applications during recent years. These networks, due to their special functional characteristics, demand the implementation of energy-aware techniques in all layers. Recently a MIMO - based structure has been proposed to offer enhanced energy savings in WSNs under certain circumstances. In this paper, we present a detailed analysis of the dissipated power during a sensor node's operation, to prove that as microelectronics develop the MIMO - based architecture will outperform the equivalent SISO structure for almost any case, in terms of energy efficiency. Moreover, we introduce a simple Cooperative Node (CN) Selection algorithm to achieve additional energy gains in the MIMO approach along with enhanced network lifetime. We examine the scalability of the algorithm on different channel conditions and varying network density, and investigate the effect of the power dissipation analysis on its efficiency.
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