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The IEEE 802.16 standard for broadband wireless metropolitan area network supports real time and non-real time services. It has a provision to design new packet-scheduling algorithms according to requirements to support Quality of Service (QoS) for real-time services. Till now published literature on WiMax states that, a Service Station (SS) requests for bandwidth to a Base Station (BS) for already arrived packets at SS from users. The BS then allocates the bandwidth to SS according to priority-based request. This paper proposes a novel adaptive-bandwidth scheduling algorithm at SS, for real-time Polling Services (rtPS), wherein the SS predicts the arrival of rtPS packets prior to the arrival and requests the BS for bandwidth in advance.
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