earticle

영어

The IEEE 802.15.4 standard is able to achieve low power transmissions in low-rate and short-distance wireless personal area network (WPAN). The CSMA/CA algorithm is used for contention mechanism that collision and retransmission occur. If a collision occurs, CSMA/CA algorithm executes retransmission operation. So it’s very important to decrease retransmission count. In this paper, we propose a channel access algorithm for IEEE 802.15.4 LR-WPAN. To performance analysis, we use OPNET network simulator. The proposed algorithm decreases the transmission delay, energy consumption, dropped packet and throughput is more increase, so the proposal algorithm is more efficient than the IEEE 802.15.4 standard .