Mitigating shadowing effects through cluster‐head cooperation techniques

Abstract

In many situations the performance of wireless communication systems decreases especially when they operate over multipath fading channels subject also to shadowing. In this sense, cluster-based networks have been introduced as an efficient solution, offering coverage extension and energy savings. In this paper, we investigate new clusterhead (CH) selection algorithms, where the nodes can select different CHs, according to the corresponding signal strength. Additionally, it is shown that if CHs are equipped with multiple antennas, the negative consequences of the fading/shadowing can be further reduced. The performance of this scheme is theoretically investigated over correlated Nakagami-m fading channels, which are also subject to shadow fading, modelled by the Gamma distribution. The derived statistical metrics are used to obtain numerical evaluated results for the outage and the average bit error probabilities. These results are complemented by computer simulated ones, which validate the accuracy of the proposed analysis.

Base Station Positioning in Wireless Sensor Network to aid Cluster Head Selection Process

“…Generally, a base station is used to gather the data from the sensors to communicate with the central authority [13,14]. The base station act as static, but in some cases, it acts as mobile to gather the data from sensor nodes [15][16][17]. Here, the positioning of the base station has an impact on the lifetime of the sensor to transmit data for decision-making process [18,19].…”

Group‐based cognitive radio network formation without common channels

“…The cluster-based network formation techniques for ad-hoc networks or sensor networks have been widely discussed (e.g. see [1][2][3][4][5][6]). With clustering schemes, mobile nodes are partitioned into a number of groups called clusters.…”