Improving QoS in the Downlink of OFDMA Networks
Keywords:
OFDMA, Resource allocation, Wireless Cellular Networks, Inter cell interference, Channel Quality InformationAbstract
In wireless cellular networks using Orthogonal Frequency Division Multiple Access scheme, the bandwidth, power, QoS have to be optimized to improve the network throughput. There are several resource allocation algorithms available to optimize the bandwidth, power, QoS and provide fairness among the users of the network. The channel quality information is shared between the various users in the network and the base station for the resource allocation purposes. The resource allocation is optimized as per the average channel quality and the user’s bandwidth needs in existing algorithms. They maximize the bandwidth allocated for the users with good channel conditions and attempts to provide reasonable bandwidth to the users with poor channel conditions. In the proposed method, we provide a resource allocation algorithm which will try to allocate resources based upon the QoS requirements. By handling different set of QoS requirements differently, the algorithm tries to optimize the network performance . The algorithm results are collected and compared with the existing solutions to evaluate the algorithm performance under different network traffic and channel conditions. The algorithm improves the performance as well as ensures the fairness among the different types of users.
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