Author_Institution :
Wireless Inf. Network Lab., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Reservation random access (RRA) protocols have been proposed for handling speech and data traffic on packet wireless networks. An interesting property of some RRA protocols is the capability of decoupling the speech access procedure from the data access procedure, so that speech access performances do not depend on actual data load. Frame-based protocols allow one to get the decoupling property easily. In this paper, we present a Markov model for analyzing the performances of frame-based RRA protocols that operate in a microcellular environment with channel errors. In the paper, this model is used for evaluating the performances of centralized RRA protocols, which use retransmissions for handling channel errors. Both in-slot access schemes, in which all the slots can be used for talkspurt setup and for user information transmission, and out-slot access schemes, with a separate reservation channel, are examined. Moreover, we present and analyze a new, stable, centralized RRA protocol, namely centralized-collision resolution access (C-CRA), which is based on collision resolution techniques
Keywords :
Markov processes; access protocols; cellular radio; data communication; land mobile radio; packet radio networks; packet reservation multiple access; packet switching; random processes; telecommunication channels; telecommunication congestion control; voice communication; Markov model; RRA protocols; centralized-collision resolution access; channel errors; collision resolution techniques; data access procedure; data load; data traffic; decoupling property; frame-based reservation random access protocols; in-slot access schemes; microcellular radio networks; out-slot access schemes; packet wireless networks; reservation channel; retransmissions; speech access performances; speech access procedure; talkspurt setup; user information transmission; Access protocols; Base stations; Interchannel interference; Performance analysis; Radio network; Radio networks; Speech; Telecommunication traffic; Wireless application protocol; Wireless networks;
