Multiple access protocols and handoff schemes with priority for the next generation communications networks

Abstract

In this dissertation, we discuss an efficient multiple access control protocol based on packet transmission technology and efficient handoff schemes with priority for handoff attempts in the next generation mobile communications networks. First, we propose the fast packet reservation multiple access (PRMA) scheme, which is a mobile-to-base transmission protocol. The original PRMA, which is a reservation multiple access protocol performing statistical multiplexing at the talkspurt level, has its inherent disadvantage that its performance deteriorates abruptly under high offered load. Mitrou``s PRMA proposed to overcome this shortcoming gives the voice traffic longer delay than the original PRMA, because the MS, which succeeds in contending on the first available reservation minislot, is not permitted to transmit its information packets before the start of the next frame. The fast PRMA proposed by us gets over these two disadvantages efficiently. We analyze the performance of the fast PRMA in two cases: the voice-only fast PRMA and the voice/data integrated fast PRMA. For the performance evaluation of the voice-only fast PRMA, we use a Markov analysis. From the numerical results, it is shown that the fast PRMA provides the expanded capacity and the decreased average delay for the voice traffic. For the voice/data integrated transmission schemes, most of those multiple access protocols have a defect that accommodating data traffic deteriorates the QoS of the voice traffic. Besides, most of the works on the voice/data integrated transmission assume that each data terminal has a storage packet buffer, the size of which is one. In the voice/data integrated fast PRMA, each data terminal is assumed to have an infinite storage packet buffer and the existence of the data traffic sources does not deteriorate the QoS of the voice traffic sources. We use a Markov analysis for the voice subsystem and an equilibrium point analysis (EPA) technique for the data subsystem in or...