An Adaptive Resource Allocation Scheme for Improving VoIP Capacity in Mobile WiMAX Systems

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Provided by: Science & Engineering Research Support soCiety (SERSC)
Topic: Mobility
Format: PDF
In WiMAX networks, a Base Station (BS) sends DL-MAP and UL-MAP messages through downlink channel to represent transmission information, such as the size of slots/symbols and Modulation/Coding Scheme (MCS), etc., for each of downlink and uplink data bursts. However, the MAP messages act as overheads. Particularly, in a Service Flow (SF) with the Unsolicited Grant Service (UGS) schedule type, it is inefficient to allocate radio resources for transmitting the MAP messages on every grant interval because the grant interval and the requested bandwidth are fixed in UGS.
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