Resource Allocation in OFDMA Wireless Communications Systems Supporting Multimedia Services.

Abstract:

We design a resource allocation algorithm for downlink of orthogonal frequency division multiple access (OFDMA) systems supporting real-time (RT) and best-effort (BE) services simultaneously over a time-varying wireless channel. Orthogonal frequency division multiple access (OFDMA) systems can offer a high data rate for guaranteeing various quality of service (QoS) requirements to a large number of users, OFDMA is regarded as one of the most promising candidates for the multiple access technique of current and future wireless multimedia communications systems. In the OFDMA systems, radio resource is represented in both frequency and time domains and can be very flexibly allocated to the users according to their need.