Efficient mapping of voice calls in wireless OFDMA systems

• Published in: IEEE communications letters 2006-09, Vol.10 (9), p.641-643
• Main Authors: Ben-Shimol, Y., Chai, E., Kitroser, I.
• Format: Article
• Language: English
• Subjects: Allocations; Applied sciences; Base stations; Bit rate; Broadcasting; Communication system traffic; Computer simulation; Exact sciences and technology; Frequency conversion; Information, signal and communications theory; Mapping; Mathematical models; Modulation coding; Multiplexing; Representations; Resource allocation; Resource management; Signal and communications theory; Systems engineering and theory; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teletraffic; Throughput; Transmission and modulation (techniques and equipments); Voice; WiMAX
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2006.1714530

We address the problem of efficient resource allocation and its description for constant bitrate traffic (e.g., voice calls) in wireless OFDMA systems. In such systems resources are allocated to users in a two-dimensional map. The representations of the allocated resources have to be broadcast, thus generating a substantial amount of overhead transmission. Here we present an efficient mapping and allocation representation algorithm that increase the total resource utilization by reducing the mapping overhead of the uplink frame for constant bitrate voice sessions. We use the IEEE 802.16 standard for a system model and investigate by simulation the performance of the proposed solution. The results show that the required overhead can be reduced greatly