Radio Resource Allocation for OFDMA Systems in High Speed Environments

In High Speed Train (HST) system, real-time multimedia entertainments are very important applications in which a data stream often contains packets with different quality of service requirements. For example, video stream encoded with scalability contains the base layer packets with High Quality (HQ) Bit Error Rate (BER) requirement and enhancement layers' packets with Low Quality (LQ) BER requirement. When a conventional allocation approach, which only considers one BER constraint for one data stream, is applied to Orthogonal Frequency Division Multiple Access (OFDMA) systems, the BER constraint will be the strictest one among multiple requirements from different types of packets, which leads to inefficient allocation when each data stream has multiple BER requirements.

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: May 2012 Format: PDF

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