Title :
Dynamic Resource Assignment for MC-CDMA with prioritization and QoS constraint
Author :
Nakano, Atsuki ; Bocquet, Wladimir
Author_Institution :
France Telecom Group, Orange Labs. Tokyo, Shinjuku
Abstract :
In this paper, we present a dynamic method for resource assignment by implementing a cross-layer design for Multi-Carrier Code Division Multiple Access (MC-CDMA) systems that adapts user allocation to channel fluctuations. Our approach consists of prioritizing users according to their class of service (CoS), assigning them to the best subchannels based on channel estimates, and allowing redundancy of assignment in case of strong degradation of otherspsila signals. This improves upon the performance of the existing methods by allowing adaptation to the system parameters. This technique has been implemented in software and validated experimentally, bringing about 6 dB gain for a bit error rate (BER) of 10-3 in a multipath fading environment with 16 users for 8 available codes, compared to the classic round robin (RR) assignment.
Keywords :
channel allocation; code division multiple access; error statistics; quality of service; bit error rate; class of service; cross-layer design; dynamic resource assignment; multicarrier code division multiple access; quality of service; user allocation; Bit error rate; Cross layer design; Degradation; Fading; Fluctuations; Gain; Multicarrier code division multiple access; Redundancy; Resource management; Round robin; Cross-Layer Design; Dynamic Resource Assignment; MC-CDMA; Multi-Code Diversity; Multi-User Diversity; Quality of Service;
Conference_Titel :
Communications, 2008. APCC 2008. 14th Asia-Pacific Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-4-88552-232-1
Electronic_ISBN :
978-4-88552-231-4
