摘要
现有LTE-A系统中,由于接入载波能力的差异,LTE用户的性能往往得不到保证。针对这一问题,提出了一种新的联合载波调度的资源分配方案,该方案根据用户类型划分UE所能接入的载波资源组,在后向兼容载波较为紧张时,使LTE-A用户以更大的概率接入到非后向兼容载波,从而保证LTE用户的性能。同时,该方案引入载波选择权重的计算,作为改进的比例公平(Proportional Fair,PF)算法的一个因子,能够实时保证载波间的负载均衡,提升系统吞吐量。
In the LTE-A system existed already, due to the difference in the ability of connecting to component carriers, the demand of LTE users can ＇ t be met sometimes. To solve this problem, a new resource scheduling scheme is proposed in this paper. In the scheme, users can determine which carri- er resource groups to connect to according to their own types. Especially when there aren＇ t too many LTE component carriers, LTE-A users can connect to LTE-A carriers with higher rate. As a result, the performance of LTE users is improved. In addition, a weigh factor to original Proportional Fair（PF） algorithm is designed to ensure the load balance of each component carrier, which can improve the system throughput.
出处
《电视技术》
北大核心
2014年第15期121-123,127,共4页
Video Engineering
基金
国家科技重大专项基金资助项目(2013ZX03003015-003)
