LTE系统上行链路调度算法研究

长期演进(Long Term Evolution,LTE)已经成为4G无线技术标准。目前,LTE分组调度的下行链路调度被大多数研究者研究,上行链路的研究相对较少。针对上行链路调度无法保证实时业务分组在延迟期限内传输,存在公平性较差、分组丢弃多的问题。因此,提出了一种新的上行链路调度算法。该算法根据实时业务的延迟约束条件建立目标整数线性规划模型,再根据目标整数线性规划模型进行调度。实验结果表明,该算法能保证实时业务分组在延迟期限内传输,适用于实时业务,能确保公平性,最小化分组丢弃,具有较好的适用性。

Exploration on LTE System Uplink of LTE System Uplink Scheduling Algorithm

LTE(Long Term Evolution)has become a technical standard of 4G wireless technology.At present,most researchers are doing exploration on the downlink scheduling of LTE packet scheduling,while the research on the uplink scheduling is relatively small.Aiming at that the uplink scheduling cannot guarantee the transmission of real-time traffic packets within delay period,the fairness is poor and the number of packets dropped is large,a new uplink scheduling algorithm is therefore proposed.The algorithm establishes a target integer linear programming model based on real-time business delay constraints,and then performs scheduling based on the target integer linear programming model.Experimental results indicate that this algorithm can guarantee the transmission of real-time traffic packets within the delay period,and is suitable for real-time services.And it can ensure fairness,minimize packet dropping,and has fairly good applicability.