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WAF: wireless-adaptive fair scheduling for multimedia stream in time division multiplexed packet cellular systems

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2 Author(s)
Young-June Choi ; Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea ; Saewoong Bahk

Cellular systems are designed to support voice service over the wireless channel but nowadays data-only networks such as cdma2000 1x EV-DO and high speed downlink packet access (HSDPA) are being deployed in the midst of evolution to the next generation wireless networks. Such systems become important because data services are essential in future wireless networks that are supposed to adopt the concept of all-IP to support integrated services. To increase the data transmission rate at downlink in cdma2000 1x EV-DO and HSDPA, the base station (BS) uses only a channel multiplexed by time division, not by code division. These systems use proportional fair scheduling to maximize throughput. While it is useful for non real time traffic, it does not provide appropriate QoS for real time services such as voice and video. Therefore we need to incorporate the multimedia QoS requirements into the design of a new scheduling algorithm. Our proposed wireless-adaptive fair scheduling (WAF) tries to allocate time slots with fair share according to the stream requirements considering the varying channel conditions to achieve good throughput. The simulation results show that our scheme can guarantee fair service and increase throughput by up to 41% compared to the purely fair (PF) scheduling scheme.

Published in:

Computers and Communication, 2003. (ISCC 2003). Proceedings. Eighth IEEE International Symposium on

Date of Conference:

30 June-3 July 2003

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