A Reservation Multiple Access Scheme for an Adaptive TDMA Air-Interface
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The RACE ATDMA [1] project is currently engaged in a research and development program to design and evaluate an advanced Adaptive TDMA air-interface, to meet the predicted requirements of a Universal Mobile Telecommunications System (UMTS). UMTS must operate in a range of different environments, and support a variety of different service classes under varying traffic loads, whilst making the most efficient use of the available radio resource. Central to the realization of this advanced system is the multiple access scheme. This paper presents the multiple access scheme that has been developed for the RACE ATDMA air-interface, to support a UMTS system. Since the project is developing both hardware and simulator test beds to evaluate the ATDMA air-interface, further evolution of this multiple access scheme is taking place, shaped by the requirements and constraints of physical realization.
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