A study on the Implementation Extended Concept of GTS in IEEE 802.15.4

Abstract

Remarkable advances in wireless communication technology have enabled communications among people who are far away from each other. In recent, the needs of local area voice communication using a wireless system based on low-cost and simple hardware are rapidly rising. However, since these applications require that the multi-users communicate on the same wireless channel in a small area, the existing voice technologies are not suitable for directly applying to these applications. Therefore, in this paper I propose a novel idea enabling multi-user voice communication. In particular, as a short range wireless solution, I employ the IEEE 802.15.4 based on low power and low cost. However, since originally the standard is not developed for voice communication, we extend the original scheme to be suitable for the voice communication by utilizing the extended concept of GTS. The capacity and validity of the proposed scheme are evaluated through quantitative analysis in various voice compression rates.

Joint Control of Duty Cycle and Beacon Tracking in IEEE 802.15.4 LR-WPAN

“…Being composed of 16 equally-spaced time slots, the active period again consists of three sub-periods: beacon, CAP(: Contention Access Period), and CFP(: Collision Free Period). The GTS(: Guaranteed Time Slot) is used to deliver delay-sensitive frames within the CFP [7].…”