Spatially divided channel access scheme using sectored antennas for CSMA/CA - 'directional CSMA/CA'

摘要

One of the most spotlighted Medium Access Control (MAC) scheme is Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA). As increasing the number of terminals and traffic in the contention scheme, serious transmission delay occurs because of avoiding packet collision. In order to solve the above problem, in this paper, we propose dividing the channel by directivity of sector antennas specially. It is named "Directional CSMA/CA". This proposal makes channel usage efficient since many terminals can transmit their packets simultaneously. From computer simulation, it is confirmed that this scheme attains high throughput and decreases transmission delay and it constructs a system in high efficiency.