一种基于仲裁的上行OFDMA资源分配算法

An Arbitration based Uplink OFDMA Resource Allocation Algorithm

对于下行OFDMA系统,为了获取最大的吞吐量,将载波分配给信道增益最好的用户是最优的分配方式,功率分配则服从注水分布。对于上行OFDMA系统,由于用户所存在的分布式功率限制,使得下行所采用的分配策略并不适用于上行。将上行OFDMA资源分配问题描述为具有资源使用竞争的情形,竞争造成了冲突,而冲突就需要有效的方式来进行裁决。着重分析了用户功率限制下的载波冲突仲裁策略,提出了一种基于仲裁的上行OFDMA资源分配算法。仿真结果表明,该算法能够以较低的复杂度获得较优的吞吐量性能。

For the downlink OFDMA system,in order to obtain the maximum throughput,it is the optimal allocation method to allocate the carrier to the user with the best channel gain,and the power allocation is subject to the water injection distribution;however,for the uplink OFDMA system,due to the distributed power limitation of the users,the allocation strategy adopted in the downlink is not suitable for the uplink.The uplink resource allocation is described as a situation with resources use competition,and competition creates conflicts,and conflicts need to be determined in an effective way.The focus is the arbitration strategy of carrier conflict under user power limit,and an arbitration based uplink OFDMA resource allocation algorithm is proposed in this paper.Simulation results show that this proposed algorithm can obtain better throughput performance with lower complexity.