Adaptive delay threshold-based priority queuing scheme with opportunistic packet scheduling for integrated service in mobile broadband wireless access systems

• Published in: IEEE communications letters Vol. 12; no. 4; pp. 241 - 243
• Main Authors: Kang, C.G., Kim, T.W., Kim, J.H.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.04.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adaptive systems; Applied sciences; Broadband; Communication system control; Delay; Delay effects; Diversity methods; Dynamical systems; Dynamics; Equipments and installations; Exact sciences and technology; Information systems; Intserv networks; Job shop scheduling; Mobile radiocommunication systems; Operation, maintenance, reliability; Priorities; Queues; Radiocommunications; Real time systems; Scheduling algorithm; Switching and signalling; Systems engineering and theory; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teletraffic; Thresholds; Mobile radiocommunication; Multiple access; Packet switching; Wireless telecommunication; Teletraffic; integrated service; Scheduling; Priority assignment; Implementation; Wide band; Queueing system; QoS; Traffic management; Packet scheduling; Traffic control; Delay time; priority queuing; Service quality; mobile broadband wireless access
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2008.071984

In this letter, we propose a novel method of implementing an opportunistic priority queuing scheme that supports both latency-sensitive real-time (RT) and best-effort non-realtime (NRT) service classes in mobile broadband wireless (MBWA) systems. It employs an adaptive delay threshold as a dynamic reference of prioritizing the urgent RT service users over others, which allows for fully leveraging the multiuser diversity gain of NRT service users under the varying system conditions. It is shown that the overall system capacity can be further increased by the proposed adaptation rule, as compared with the existing opportunistic priority queuing scheme with the fixed delay threshold.