Multidimensional PRMA with prioritized Bayesian broadcast-a MACstrategy for multiservice traffic over UMTS

摘要

Multidimensional packet reservation multiple access is proposed asna medium-access control (MAC) strategy for the uplink channel of thenUTRA (UMTS terrestrial radio access) time-division/code-divisionnmultiple-access (TD/CDMA) mode to benefit from efficient statisticalnmultiplexing on the large common pool of available resources (i.e.,nslots defined both in time and code domain). A prioritized Bayesiannbroadcast algorithm is derived to stabilize multidimensional packetnreservation multiple access (MD PRMA) and to allow for access delayndiscrimination of four different access classes. Access delay spread cannbe selected, and trading voice-dropping ratio against data-access delaynis possible. To control multiple-access interference, Bayesian broadcastncan be combined with load-based access control. The performance of bothnfrequency-division duplex (FDD) and time-division duplex (TDD) mode isnevaluated, the latter particularly relevant for TD/CDMA. For mixednvoice, Worldwide Web (WWW) browsing, and e-mail traffic, the UMTS WWWnmodel is used, while the e-mail traffic model is derived here