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Nagarajan, G.
- Performance of Half Duplex Cellular Network over a Multiple Access Relaying Channel
Authors
1 SCSVMV University, Kancheepuram, Tamil Nadu, IN
2 Department of Electronics and Communication Engineering, Pondicherry Engineering College, Pondicherry, IN
Source
Wireless Communication, Vol 9, No 2 (2017), Pagination: 34-38Abstract
In the perspective of improving coverage and spatial diversity the need for cooperative relaying has already proved mandatory. The need for multiple access relaying is also proportionately increasing with an enhanced signal reception and reduced system cost with less number of base stations. The use of Analog Network Coding (ANC) on the Multiple Access Relay Channel (MARC) with multiple relay has been under investigation. Two phases of transmission is performed in the relaying environment to enhance the performance in a co-operative wireless system. The data from the source to relay is communicated on a virtual MIMO scheme and the data from the relay to destination is time shared. An analytical modeling has been derived for both direct and indirect links with MARC two phase transmissions. The performance analysis in terms of Bit Error Rate (BER) for both direct and indirect links is carried out for Rayleigh fading channel. The performance of the proposed model shows an optimal improvement in the error rate analysis.
Keywords
Relay, Multiple Access Relay Channel, Analog Network Coding, ML Combining, Rayleigh Fading.
- Enhancement of Network Lifetime of Wireless Sensor Networks Using Energy Efficient Mobile Sink Based Routing Protocol
Authors
1 Department of ECE, Pondicherry Engineering College, Puducherry, IN
Source
Wireless Communication, Vol 9, No 3 (2017), Pagination: 45-49Abstract
Sensors are used to gather information from the environment and sent it to the base station. The most challenging task in wireless sensor network is to save the energy level of nodes. Clustering plays a vital role in transferring the data from the sensors to the base station. Sensor near the sink node will deplete their energy quickly when compared to other sensors in the environment which leads to energy hole problem. In order to avoid the energy hole problem, mobility of a sink has been accepted as a better way to overcome the issue. This paper proposes an Energy Efficient Mobile Sink Based Routing Protocol (EEMSBRP) in order to guide the mobile sink to find the appropriate path and move to the specific location and gather the sensitive information from the cluster head. The performance of the EEMSBRP is compared with the existing protocol namely Mobile Sink Based Adaptive Immune Energy Efficient Clustering Protocol (MSIEEP) using Network Simulator (NS2). The proposed protocol improves the packet delivery ratio and packet drop rate over MSIEEP, as it always prefers the Cluster heads as high energy nodes. The mobile sink also decreases the number of intermediate nodes for routing which helps to increase the packet delivery ratio and decrease in drop rate.