RESOURCE ALLOCATION FOR DEVICE-TO-DEVICE COMMUNICATIONS UNDERLAYING LTE-ADVANCED NETWORKS
RESOURCE ALLOCATION FOR DEVICE-TO-DEVICE COMMUNICATIONS UNDERLAYING LTE-ADVANCED NETWORKS
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DOI：
10.1109/mwc.2013.6590055
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发表时间：
2013-08-01
影响因子：
12.9
通讯作者：
Kim, Dong In
中科院分区：
文献类型：
--
作者：
Phunchongharn, Phond;Hossain, Ekram;Kim, Dong In
正在开发高级长期演进（LTE-Advanced）网络以提供用于第四代（4G）蜂窝无线系统的移动的宽带服务。设备到设备（D2 D）通信是在高级LTE网络中提供无线对等服务并提高频谱利用率的有前景的技术。在D2 D通信中，当经由基站通信时，允许用户设备（UE）通过重用蜂窝资源而不是在蜂窝模式下使用上行链路和下行链路资源来在彼此之间直接通信。然而，在蜂窝网络中实现D2 D通信提出了两个主要挑战。首先，D2 D设备对蜂窝用户造成的干扰可能严重影响蜂窝设备的性能。其次，需要保证D2 D通信的最低服务质量（QoS）要求。在这篇文章中，我们介绍了一种新的资源分配方案（即联合资源块调度和功率控制）的D2 D通信在LTE-Advanced网络，以最大限度地提高频谱利用率，同时解决上述挑战。首先，描述高级LTE网络的概述，以及用于在这些网络中提供D2 D通信的架构和信令支持。此外，研究问题和当前的国家的最先进的D2 D通信进行了讨论。然后，针对D2 D通信提出了基于列生成方法的资源分配方案。目标是通过找到D2 D链路的时隙方面的最小传输长度来最大化频谱利用，同时保护蜂窝用户免受有害干扰并保证D2 D链路的QoS。该方案的性能进行了评估，通过模拟。
The Long Term Evolution-Advanced (LTE-Advanced) networks are being developed to provide mobile broadband services for the fourth generation (4G) cellular wireless systems. Device-to-device (D2D) communications is a promising technique to provide wireless peer-to-peer services and enhance spectrum utilization in the LTE-Advanced networks. In D2D communications, the user equipments (UEs) are allowed to directly communicate between each other by reusing the cellular resources rather than using uplink and downlink resources in the cellular mode when communicating via the base station. However, enabling D2D communications in a cellular network poses two major challenges. First, the interference caused to the cellular users by D2D devices could critically affect the performances of the cellular devices. Second, the minimum quality-of-service (QoS) requirements of D2D communications need to be guaranteed. In this article, we introduce a novel resource allocation scheme (i.e. joint resource block scheduling and power control) for D2D communications in LTE-Advanced networks to maximize the spectrum utilization while addressing the above challenges. First, an overview of LTE-Advanced networks, and architecture and signaling support for provisioning of D2D communications in these networks are described. Furthermore, research issues and the current state-of-the-art of D2D communications are discussed. Then, a resource allocation scheme based on a column generation method is proposed for D2D communications. The objective is to maximize the spectrum utilization by finding the minimum transmission length in terms of time slots for D2D links while protecting the cellular users from harmful interference and guaranteeing the QoS of D2D links. The performance of this scheme is evaluated through simulations.