Abstract
To support a directional antenna, IEEE 802.15.3c specifies a high data transmission rate and short frequency range communication based on the characteristics of 60 GHz band. However, the contention-based protocol of IEEE 802.15.3c may cause channel collisions and throughput degradation as the number of stations in the network increases. In order to resolve this problem and reduce channel access latency, we propose an adaptive contention access period (CAP) assignment approach in which the contention window size for optimal transmission probability is derived after the directional information has been obtained by means of access point (AP) control procedures. Simulations demonstrate that the proposed algorithm outperforms the existing channel access scheme in IEEE 802.15.3c networks.
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