Spectrum resource allocation for wireless packet access withapplication to advanced cellular Internet service

摘要

The advanced cellular Internet service (ACIS) is targeted fornapplications such as Web browsing with a peak downlink transmission ratenon the order of 1-2 Mbits/s using a wide-area cellular infrastructure.nIn order to provide bandwidth on demand using scarce radio spectrum, thenmedium-access control (MAC) protocol must: 1) handle dynamic and diversentraffic with high throughput, and 2) efficiently reuse limited spectrumnwith high peak rates and good quality. Most of the existing approachesndo not sufficiently address the second aspect. This paper proposes andynamic packet assignment (DPA) scheme which, without coordinating basenstations, allocates spectrum on demand with no collisions and lowninterference to provide high downlink throughput. Interference sensingnand priority ordering are employed to reduce interference probability. Anstaggered frame assignment schedule is also proposed to prevent adjacentnbase stations from allocating the same channel to multiple mobiles atnthe same time. Simulation results based on a packet data traffic modelnderived from wide-area network traffic statistics, which exhibit an“self-similar” property when aggregating multiple sources,nconfirm that this method is able to reuse spectrum efficiently in anlarge cellular system having many users with short active periods.nDistributed iterative power control further enhances spectrum efficiencynsuch that the same channel can be simultaneously reused in every basenstation