TITLE:
An Incremental-Selective Cooperative Relaying Scheme with Best Relay Selection in WSN80002
AUTHORS:
Shaoqing Wang, Hanlin Yang, Ning Zhou, An Wang
KEYWORDS:
Cooperative Relaying, Wireless Sensor Networks, Normalized Throughput, Delay, Energy Efficiency
JOURNAL NAME:
Journal of Computer and Communications,
Vol.3 No.3,
March
18,
2015
ABSTRACT: In wireless sensor networks, the
traditional multi-relay incremental cooperative relaying (MIR) scheme could
improve the system throughput over the fading channel enormously by exploiting
multiple relay nodes to retransmit the copy of the source packet to the
destination in turn, but increase the energy consumption and transmission delay.
In order to mitigating the energy consumption and transmission delay, this
paper proposes a new cooperative relaying scheme termed as
incremental-selective relaying with best-relay selection (ISR), which selects
the best relay node from the candidate relays to retransmit the packet to the
destination only when the direct transmission between the source and the
destination is not successful. Expressions of normalized throughput, normalized
delay and energy efficiency for the ISR and MIR systems are derived respectively
and their performances are compared through simulations. The results show that
normalized throughput, normalized delay and energy efficiency for the ISR
system all outperform the corresponding performances of the MIR system.
Especially, there are different the optimal number of relays which can maximize
the energy efficiency of system.