Title :
Performance comparison of OFDM bandwidth request schemes in fixed IEEE 802.16 networks
Author :
He, Jianhua ; Tang, Zuoyin ; Chen, Hsiao-Hwa
Author_Institution :
Swansea Univ., Swansea
fDate :
4/1/2008 12:00:00 AM
Abstract :
IEEE 802.16 standard specifies two contention based bandwidth request schemes working with OFDM physical layer specification in point-to-multipoint (PMP) architecture, the mandatory one used in region-full and the optional one used in region-focused. This letter presents a unified analytical model to study the bandwidth efficiency and channel access delay performance of the two schemes. The impacts of access parameters, available bandwidth and subchannelization have been taken into account. The model is validated by simulations. The mandatory scheme is observed to perform closely to the optional one when subchannelization is active for both schemes.
Keywords :
IEEE standards; OFDM modulation; WiMax; bandwidth allocation; broadband networks; radio access networks; telecommunication standards; IEEE 802.16 networks; OFDM bandwidth request; WiMAX; bandwidth efficiency; broadband wireless access; channel access delay performance; point-to-multipoint architecture; unified analytical model; Algorithm design and analysis; Analytical models; Bandwidth; Delay; Downlink; Helium; OFDM; Physical layer; Portable media players; WiMAX;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2008.072124
