Title :
Dynamic Subcarrier Reuse With Rate Guaranty in a Downlink Multicell OFDMA System
Author :
Lengoumbi, Carle ; Godlewski, Philippe ; Martins, Philippe
Author_Institution :
Ecole Nat. Superieure des Telecommun., Telecom Paris
Abstract :
In this paper, the downlink of a multi-cell OFDMA system is considered. Rate adaptive optimization is investigated with minimum rate requirement and in presence of co-channel interference. A low-complexity subcarrier allocation scheme is proposed. A particular procedure provides limitation of co-channel interference by dynamically adapting the subcarrier reuse factor. A rate requirement violation (RRV) threshold is introduced to decide whether or not the interference limitation procedure is to be used. The performance is evaluated for variant user´s rate requirement. The evaluation includes comparison of the cell global rate and the outage probability with existing heuristics
Keywords :
cochannel interference; frequency division multiple access; interference suppression; optimisation; probability; cell global rate; co-channel interference; downlink multicell OFDMA system; dynamic subcarrier reuse; interference limitation procedure; low-complexity subcarrier allocation scheme; minimum rate requirement; outage probability; rate adaptive optimization; rate guaranty; rate requirement violation threshold; subcarrier reuse factor; Bandwidth; Broadband communication; Downlink; Frequency conversion; Interchannel interference; Land mobile radio; Mobile communication; OFDM; Resource management; Signal to noise ratio; Co-Channel Interference; Frequency Reuse Factor; OFDMA; Rate Adaptive Optimization; Subcarrier Assignment;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.253956
