Title :
Capacity assessment for UTRA
Author :
Ortigoza-Guerrero, Lauro ; Aghvami, A.H.
Author_Institution :
Centre for Telecommun. Res., King´´s Coll., London, UK
Abstract :
Capacity evaluation of the downlink of two systems, hybrid WB-TD/CDMA using asymmetric time division duplex and WB-CDMA, is presented. These systems correspond to the FRAMES Project Proposal Mode 1 and Mode 2 for UTRA (UTRA TDD and UTRA FDD mode, respectively). Cell capacity in Erl/carrier/cell and spectrum efficiency in kbps/MHz/cell are assessed for five different circuit switched services in a 5 MHz bandwidth. Two different resource allocation strategies are considered in the evaluation of the TD/CDMA-TDD system, classic fixed channel assignment (FCA) and simple dynamic channel allocation (SDCA). For WB-CDMA, only FCA is used. The blocking and the forced termination probabilities are presented and compared for the WB-TD/CDMA-TDD system using FCA and SDCA
Keywords :
broadband networks; cellular radio; channel allocation; circuit switching; code division multiple access; multiuser channels; network interfaces; probability; radio access networks; radio links; research initiatives; 5 MHz; FCA; FDD mode; FRAMES Project; SDCA; TD/CDMA-TDD system; TDD mode; UMTS Radio Interface; UMTS Terrestrial Radio Access; UTRA; WB-CDMA; asymmetric time division duplex; bandwidth; blocking probability; capacity assessment; cell capacity; circuit switched services; downlink; fixed channel assignment; forced termination probability; hybrid WB-TD/CDMA; mobile radio channel sharing; resource allocation; simple dynamic channel allocation; spectrum efficiency; 3G mobile communication; Bandwidth; Channel allocation; Downlink; Educational institutions; Multiaccess communication; Proposals; Switching circuits; Telecommunication standards; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.780682
