A novel channel assignment approach in TDMA/CDMA-TDD systems

Author

Haas, H. ; McLaughlin, Steve

Author_Institution

Inf. & Commun. Mobile Networks, Siemens AG, Grasbrunn, Germany

Volume

2

fYear

2001

fDate

Sep/Oct 2001

Abstract

The interference in a TDD system is demonstrated as being comprised of two categories of interference: (1) same entity interference, which is base station (BS) to BS interference and mobile station (MS) to MS interference; (2) other entity interference which is BS→MS and MS→BS interference. Based on this specific TDD property, an equation for capacity in a CDMA/TDD system is derived. Moreover, it is shown that the capacity in a CDMA/TDD system can be significantly higher compared with an equivalent FDD system. This assumes use of a DCA algorithm. A novel DCA is presented which uses a newly developed method termed: time slot (TS) opposing technique. The main advantage of this technique is that a TDD system adopting different asymmetries for uplink and downlink in neighbouring cells does not necessarily suffer from capacity losses

Keywords

cellular radio; channel allocation; code division multiple access; radiofrequency interference; time division multiple access; time division multiplexing; CDMA-TDD; TDMA-TDD; base station; channel assignment; mobile station; other entity interference; same entity interference; time slot opposing technique; 3G mobile communication; Base stations; Buildings; Downlink; Intelligent networks; Interference; Mobile communication; Switches; Time division multiple access; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2001 12th IEEE International Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-7244-1

Type

conf

DOI

10.1109/PIMRC.2001.965278

Filename

965278