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A bandwidth allocation algorithm with channel quality and QoS aware for IEEE 802.16 base stations
Author(s) -
Yeh YiHsuan,
Lai YuanCheng,
Chen YenHung,
Lai ChingNeng
Publication year - 2014
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2422
Subject(s) - goodput , computer science , computer network , quality of service , bandwidth (computing) , telecommunications link , bandwidth allocation , weighted fair queueing , base station , channel allocation schemes , channel (broadcasting) , dynamic bandwidth allocation , ieee 802 , algorithm , real time computing , throughput , telecommunications , wireless
SUMMARY Subscriber stations located in different places encounter various interferences in an IEEE 802.16 network, resulting in that their communication channels experience varying channel conditions. Thus, an excellent bandwidth allocation algorithm should not only satisfy various QoS required by heterogeneous traffic, but also consider the channel quality to maximize bandwidth utilization. In this paper, a bandwidth allocation algorithm with channel quality awareness and QoS guarantee, called CQQ, is proposed. CQQ not only satisfies each connection's QoS requirement, but also dynamically adjusts the downlink/uplink bandwidth to match current downlink/uplink traffic ratio. CQQ allocates more bandwidth to the connections having better channel quality by applying weighted fair queuing strategy to raise the bandwidth usage. CQQ provides lower delay violation ratio and higher goodput than the previous algorithms, as observed from the simulation results. Copyright © 2012 John Wiley & Sons, Ltd.