In this paper I focused on resource scheduling in the downlink of LTE-Advanced with aggregation of multiple Component Carriers (CCs). When Carrier Aggregation (CA) is applied, a well-designed resource scheduling scheme is essential to the LTE-A system. Joint User Scheduling (JUS), Separated Random User Scheduling (SRUS), Separated Burst-Level Scheduling (SBLS) are three different resource scheduling schemes. JUS is optimal in performance but with high complexity and not considering quality of experience (QoE) parameters. Whereas SRUS and SBLS are contrary and users will acquire few resources because they do not support CA and the system fairness is disappointing. The author propose a novel Carrier Scheduling (CS) scheme, termed as "Quality of Service and Channel Scheduling" (QSCS). Connected CCs of one user can be changed in burst level and these changes are based on checking of services priority and quality of signal that user experiences. Simulation results show that the proposed algorithm can effectively enhance throughput of users like JUS and also it chooses best CCs based on QoS and channel quality parameters. The simulation results also show that achieved QoE is much better than other algorithms.
翻译:本文重点研究了在LTE-Advanced下行链路中,针对多个分量载波(CC)聚合的资源调度问题。当应用载波聚合(CA)时,设计良好的资源调度方案对LTE-A系统至关重要。联合用户调度(JUS)、分离随机用户调度(SRUS)和分离突发级别调度(SBLS)是三种不同的资源调度方案。JUS性能最优,但复杂度高且未考虑体验质量(QoE)参数。而SRUS与SBLS则相反,用户因不支持CA而获取资源较少,且系统公平性不尽如人意。作者提出一种新颖的载波调度(CS)方案,称为"服务质量与信道调度"(QSCS)。同一用户连接的CC可在突发级别发生变化,这些变化基于对业务优先级和用户信号质量的检测。仿真结果表明,该算法能像JUS一样有效提升用户吞吐量,并能根据QoS和信道质量参数选择最佳CC。同时,仿真结果还显示其获得的QoE远优于其他算法。