Novel Cross-Layer QoE-Aware Radio Resource Allocation Algorithms in Multiuser OFDMA Systems
Novel Cross-Layer QoE-Aware Radio Resource Allocation Algorithms in Multiuser OFDMA Systems
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DOI：
10.1109/tcomm.2014.2347288
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发表时间：
2014-09-01
影响因子：
8.3
通讯作者：
Kos, Andrej
中科院分区：
文献类型：
--
作者：
Rugelj, Miha;Sedlar, Urban;Kos, Andrej
体验质量（QoE）的保证和系统的高吞吐量的提供代表了未来无线和移动的网络的主要目标。针对异构正交频分多址（OFDMA）系统下行链路，提出了一种新颖实用的跨层QoE感知无线资源分配（RRA）算法。所提出的算法的目的是通过将应用层参数和主观的人类感知的质量到RRA过程中，以确保适当的水平的QoE为系统的每个用户。本文提出了两种面向用户的低复杂度的联合子载波和功率分配算法。第一种算法通过向系统的所有用户保证相同的QoE水平来动态地分配资源，而第二种算法在用户的QoE和系统的频谱效率之间引入了有效的折衷。通过考虑应用层参数和用户对质量的感知，可以实现高用户的QoE和数据速率的显式控制。数值结果表明，与以往的算法相比，该算法在用户间实现了公平的容量分配，并接近OFDMA系统的QoE最优解。
The assurance of quality of experience (QoE) and provisioning of high throughput of the system represent the main goals of future wireless and mobile networks. This paper presents novel and practical cross-layer QoE-aware radio resource allocation (RRA) algorithms for the downlink of a heterogeneous orthogonal frequency division multiple access (OFDMA) system. The objective of the proposed algorithms is to assure the appropriate level of QoE for each user of the system by incorporating application-layer parameters and subjective human perception of quality into the RRA process. We propose two user-oriented joint subcarrier and power allocation algorithms with low complexity for real-time and interactive services. The first algorithm dynamically allocates resources by assuring the same level of QoE to all users of the system, whereas the second algorithm introduces the efficient trade-off between the user's QoE and the spectral efficiency of the system. By considering application-layer parameters and user's perception of quality, high users' QoE and explicit control of data rates can be achieved. The numerical results show that the proposed algorithms achieve significant increase in the level of QoE compared to previous works, a fair distribution of capacity among users and near to optimal solution of QoE for the OFDMA system.