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

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2 Author(s)
Brand, B.E. ; Center for Telecommun. Res., King''s Coll., London, UK ; Aghvami, A.H.

Multidimensional packet reservation multiple access is proposed as a medium-access control (MAC) strategy for the uplink channel of the UTRA (UMTS terrestrial radio access) time-division/code-division multiple-access (TD/CDMA) mode to benefit from efficient statistical multiplexing on the large common pool of available resources (i.e., slots defined both in time and code domain). A prioritized Bayesian broadcast algorithm is derived to stabilize multidimensional packet reservation multiple access (MD PRMA) and to allow for access delay discrimination of four different access classes. Access delay spread can be selected, and trading voice-dropping ratio against data-access delay is possible. To control multiple-access interference, Bayesian broadcast can be combined with load-based access control. The performance of both frequency-division duplex (FDD) and time-division duplex (TDD) mode is evaluated, the latter particularly relevant for TD/CDMA. For mixed voice, Worldwide Web (WWW) browsing, and e-mail traffic, the UMTS WWW model is used, while the e-mail traffic model is derived here

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:47 ,  Issue: 4 )

Date of Publication:

Nov 1998

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