Wireless Resource Allocation Algorithm Based On OFDMA

Wireless communication system has been experienced significant developmentfrom birth. It came from first-generation analog communication system and evolved tothe fourth-generation of mobile communication system. The communicationtechnology experienced the initial FDMA, TDMA, CDMA to the MIMO, OFDMA. Asthe same time, the communication system bandwidth became from narrow-band tobroad-band,and the utilization of the resources were gradually improved.As we know, because of the scarce radio resources, it became a main problempursued by many scholar, that how to use limited resources to meet the different needsof business users. The OFDMA technology improve resource utilization.This articledescribes a radio resource allocation of the status quo, then discuss the radio resourceallocation algorithm in two different scenes–the single-cell scene and the multi-cellscene.This article studied several existing resource allocation algorithms in a single cell,including Jang algorithm, Rhee algorithm. This article focus on Jang algorithm andShen algorithm. These two algorithms are not directly on the ability tomulti-bandwidth the user support. For the above reasons, the ability to support multiplebandwidth user’s resource allocation algorithm is designed in this article. Thealgorithm used in the mechanism of carrier aggregation, an optimization problem isdivided into two optimization problem, that are to minimize the resource blocks usedby the users QoS demands and to maximize the user of the resource blocks used by theBE traffic. So that a certain the extent to ensure the QoS of the user, and to guarantee acertain throughput of the case, also reduced the complexity of calculation.Resource allocation in multi-cell, described several existing interferencecoordination mechanism-based algorithms, including Huawei Ericsson algorithms,Siemens algorithm and analyzed SICUN algorithm, SICUN algorithm does not involveuser QoS guarantee, but only for single-business. For the above reasons, this articleimproved the SICUN algorithm. Guaranteed the user’s QoS, it allocate resources forusers based on the user’s QoS requirements, frequency of use of cell edge through rational planning, reduce inter-cell interference, a multi-service support. The Q-SICUNalgorithm guarantees the users’ QoS when there are sufficient resources, but when lackof resources this algorithm can’t provide a good guarantee for the center user’s QoSrequirements. To against this defect, this paper designed EQ-SICUN algorithm that canappropriately reduce the QoS requirements of the edge users to ensure the center user’sQoS requirements.