Abstract
In this paper we propose an energy-efficient relay
selection algorithm for clustered Wireless Sensor Networks
(WSNs). In contrast to conventional multi-hop transmission
schemes adopted in clustered WSNs, where only cluster heads
(CHs) participate in the transmission, in our method the relay is
selected from a set of candidate nodes within the source
transmission range, subject to predefined desired transmission
power at the source and the relay. The fundamental of this
method is to forward the source signal using the node which
minimizes the end-to-end total path distance, such that the total
energy cost per bit is reduced at the relay and at the source.
Thus, the node that satisfies the signal-to-noise ratio (SNR)
distance-based threshold of both links participates in the
transmission. Taking into consideration the circuit energy cost,
the modulation strategy and its impact on energy cost are
investigated and the optimal choice of the number of bits per
symbol is considered to optimize the total energy cost per
transmission. The proposed method is shown to be more energy
efficient compared to the traditional multi-hop transmission
and random relay selection in terms of energy cost for a target
bit error rate at the destination. Additionally, the proposed
method also outperforms both methods in terms of the network
lifetime.
selection algorithm for clustered Wireless Sensor Networks
(WSNs). In contrast to conventional multi-hop transmission
schemes adopted in clustered WSNs, where only cluster heads
(CHs) participate in the transmission, in our method the relay is
selected from a set of candidate nodes within the source
transmission range, subject to predefined desired transmission
power at the source and the relay. The fundamental of this
method is to forward the source signal using the node which
minimizes the end-to-end total path distance, such that the total
energy cost per bit is reduced at the relay and at the source.
Thus, the node that satisfies the signal-to-noise ratio (SNR)
distance-based threshold of both links participates in the
transmission. Taking into consideration the circuit energy cost,
the modulation strategy and its impact on energy cost are
investigated and the optimal choice of the number of bits per
symbol is considered to optimize the total energy cost per
transmission. The proposed method is shown to be more energy
efficient compared to the traditional multi-hop transmission
and random relay selection in terms of energy cost for a target
bit error rate at the destination. Additionally, the proposed
method also outperforms both methods in terms of the network
lifetime.
| Original language | English |
|---|---|
| Title of host publication | IEEE International Conference on Communications, Networks, and Satellite (COMNETSAT), Padang, Indonesia, December 11–13, 2025. |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Publication status | Accepted/In press - 1 Nov 2025 |