A QoE-aware joint resource allocation algorithm for uplink carrier aggregation in LTE-Advanced systems
A QoE-aware joint resource allocation algorithm for uplink carrier aggregation in LTE-Advanced systems
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DOI：
10.1109/icc.2014.6883462
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Yujae Song;Youngnam Han;Yonghoon Choi
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文献类型：
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作者：
Yujae Song;Youngnam Han;Yonghoon Choi
载波聚合（Carrier aggregation， CA）是LTE-A （Long Term Evolution-Advanced）通信系统的一个重要特性，它可以将两个或多个载波聚合在一起，形成更宽的传输带宽，最高可达100mhz。通过CA，用户设备（UE）可以同时被调度到多个CA上，以传输数据流量。近年来，基于LTE-A的CA系统在多个CA同时接入场景下的高效运行研究备受关注。然而，现有文献缺乏对体验质量（QoE）感知CA的研究，尤其是在上行链路方面。在本文中，我们提出了一种基于上行LTE-A系统的联合资源分配算法，重点关注qos感知CA。我们首先通过设计链路奖励、资源成本和链路效用函数，提出了一个用于评估终端QoE满意度水平的框架。在此基础上，提出了一种基于qos感知的联合资源分配算法，实现ue间无线资源的高效共享，使上行系统的效用最大化。数值结果验证了该算法的有效性。
Carrier aggregation (CA) is an essential feature in the Long Term Evolution-Advanced (LTE-A) system, which can aggregate two and more component carriers (CCs) to form a much wider transmission bandwidth up to 100 MHz. By means of CA, a user equipment (UE) can be scheduled on multiple CCs simultaneously to transmit data traffic. Recently, the studies on the efficient operation of an LTE-A based CA system have received much attention under simultaneous access scenarios for multiple CCs. However, the existing literature lacks efforts on Quality of Experience (QoE)-aware CA, especially in the uplink. In this paper, we propose a joint resource allocation algorithm for an uplink LTE-A based system, focusing on QoE-aware CA. We first present a framework for the evaluation of UE's QoE satisfaction level by designing a link reward, resource cost, and link utility function. Then, a QoE-aware joint resource allocation algorithm is proposed for the efficient sharing of radio resource by UEs, so that uplink system utility is maximized. Numerical results demonstrate the validity of the proposed algorithm.