Title :
Strategies to Improve the Utilization Ratio of CQI Channels in IEEE 802.16 Systems
Author :
Lilei Wang ; Xiaoyi Wang ; Huimin Xu
Author_Institution :
Sch. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
IEEE 802.16 systems adopt a "semi-dynamic" allocation mechanism of channel quality indicator (CQI) channels. However, low utilization ratio of CQI channels reduces the spectrum efficiency. So we propose three adjusting strategies based on a "toy brick model" to improve the utilization ratio of CQI channels. The simulation results manifest the improvement. In addition, we analyze the tradeoff between the increase of utilization ratio and the increase of signaling overhead.
Keywords :
WiMax; channel allocation; wireless channels; CQI channels; IEEE 802.16 systems; adjusting strategy; channel allocation; channel quality indicator; toy brick model; utilization ratio; Algorithm design and analysis; Base stations; Channel allocation; Channel estimation; Communication standards; Data communication; Feedback; Mobile communication; Modulation coding; Signal analysis;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.739
