Title :
Performance Analysis of a Semi-fixed Mapping Scheme for VoIP Services in Wireless OFDMA Systems
Author_Institution :
Dept. of Electron. Eng., Sogang Univ., Seoul, South Korea
Abstract :
Informing users about new resource assignments has to be broadcast, thus generating a substantial amount of the mapping overhead that influences the system throughput. In particular, the performance of voice-over-Internet protocol (VoIP) services is seriously affected by the mapping overhead because the VoIP packet size is small. In order to reduce the mapping overhead, a semi-fixed mapping scheme based on the periodicity of VoIP traffic was introduced. However, up to now, the detailed operation and the analysis of the semi-fixed mapping scheme have not been studied. This paper develops analytical and simulation models and evaluates the performance of a semi-fixed mapping scheme for VoIP services in wireless orthogonal frequency division multiple access systems.
Keywords :
Internet telephony; OFDM modulation; frequency division multiple access; protocols; resource allocation; telecommunication traffic; VoIP traffic services; orthogonal frequency division multiple access; performance analysis; resource assignment; semifixed mapping scheme; voice-over-Internet protocol; wireless OFDMA system; Analytical models; Broadcasting; Downlink; Frequency conversion; Media Access Protocol; Modulation coding; Performance analysis; Resource management; Traffic control; Wireless communication; IEEE 802.16e; Mapping overhead; VoIP; WiMAX; resource allocation;
Conference_Titel :
Wireless and Mobile Communications, 2009. ICWMC '09. Fifth International Conference on
Conference_Location :
Cannes, La Bocca
Print_ISBN :
978-1-4244-4679-7
Electronic_ISBN :
978-0-7695-3750-4
DOI :
10.1109/ICWMC.2009.10
