Abstract :
Restricted energy sources for wireless sensor
networks have resulted in a number of energyefficient MAC protocols being proposed and
improved. These proposed protocols tried to
reduce the energy dissipation and to prolong the
network lifetime. An adaptive slotted ALOHA
based p-persistent CSMA MAC protocol has
been proposed in this paper. The proposed
protocol addresses the vulnerabilities of both the
slotted ALOHA and the p-persistent CSMA
protocols, such as the high possibility of collision,
force the stations to transmit at the start of the
slot, fixed slot length, and continuous sensing in
the P-persistent CSMA MAC protocol. The
proposed protocol aims to reduce collision
potential, reduce sensing, minimize energy
expenditure, and maximize network lifetime.
MATLAB simulation has been used for the
evaluation of the protocol's performance and
effectiveness. The simulation results displayed
that the improvement rate for the proposed
adaptive slotted ALOHA based p-persistent
CSMA MAC protocol was 95%, 95%, 96.88%,
99.82%, and 99.77% compared to pure ALOHA,
slotted ALOHA, p-persistent CSMA, S-MAC,
and T-MAC protocols respectively in terms of
number of alive nodes and energy consumption.
As a result, the proposed protocol has
dramatically enhanced the network of wireless
sensors in terms of minimizing energy
consumption and extending the life of the
network.
Keyword :
Adaptive Slotted-ALOHA, energyefficient MAC protocols, p-persistent CSMA, slotted-ALOHA, wireless sensor networks (WSNs)