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Distributed Timeslot Allocation with Crossed Slots in CDMA-TDD Systems
Korea Advanced Institute of Science and Technology (KAIST).ORCID iD: 0000-0001-7642-3067
Korea Advanced Institute of Science and Technology (KAIST).
2010 (English)In: Wireless Communications & Mobile Computing, ISSN 1530-8669, E-ISSN 1530-8677, Vol. 10, no 3, 337-348 p.Article in journal (Refereed) Published
Abstract [en]

Code division multiple access system with time division duplex (CDMA-TDD) is a promising solution to cope with traffic asymmetry of downlink (DL) and uplink (UL) in multimedia services. When a rate of asymmetry is different in each cell, CDMA-TDD system may employ crossed slots, where a timeslot is used for different links in cells. However, it may suffer from base station (BS)-to-BS and mobile station (MS)-to-MS interference problem. Zone division scheme is an efficient way to tackle the crossed slot interference by dividing a cell into inner and outer zones and restricting communication in crossed slots only to inner zone. In this paper, we propose distributed crossed slot resource allocation with zone division in multi-cell CDMA-TDD system. Two conditions for crossed slot resource allocation are defined and the bound on the size of inner zone is analyzed mathematically based on the conditions. Relationship between the capacity of crossed slot and the size of inner zone is also analyzed. Then, numerical results of the mathematical analysis are presented; showing that the proposed crossed slot allocation is effective for traffic asymmetry problem.

Place, publisher, year, edition, pages
2010. Vol. 10, no 3, 337-348 p.
Keyword [en]
CDMA-TDD, crossed slot, zone division, distributed resource allocation
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-66664DOI: 10.1002/wcm.764ISI: 000275347600002OAI: oai:DiVA.org:kth-66664DiVA: diva2:484498
Note
QC 20120127Available from: 2012-01-27 Created: 2012-01-27 Last updated: 2017-12-08Bibliographically approved

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Sung, Ki Won

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