在设备到设备系统中,基站辅助邻居发现

Daoud Burghal, A. Tehrani, A. Molisch
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引用次数: 3

摘要

邻居发现是任何设备到设备(D2D)通信的必要先决条件。与ad-hoc网络不同,D2D网络中的基站(BS)可以促进邻居发现过程。然而,设备到BS的信道状态或设备位置不足以向BS提供有关设备之间信道质量的信息。因此,由于设备间链路质量的固有不确定性,不能将bs辅助邻居发现视为典型的调度问题。在本文中,我们研究了D2D网络中的辅助定向邻居发现。我们首先将调度问题表述为捕获不确定性的整数优化问题。然后提出了一种基于贪心的集中调度方法来确定定向导频传输实例。我们还提出了一种单向随机发现,其中我们基于两种技术选择定向传输概率,一种是直观的方法,一种是优化的方法。最后,我们提供了仿真结果来评估方案的性能。
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Base station assisted neighbor discovery in device to device systems
Neighbor discovery is an essential prerequisite for any device-to-device (D2D) communication. Unlike ad-hoc networks, the base station (BS) in D2D networks may facilitate the neighbor discovery process. However, device-to-BS channel states or device locations are not enough to provide BS with information on the channel quality between the devices. Thus, due to the inherent uncertainty of link quality between devices, the BS-assisted neighbor discovery cannot be treated as typical scheduling problem. In this paper, we investigate the assisted directional neighbor discovery in D2D networks. We first formulate the scheduling problem as an integer optimization problem that captures the uncertainty. Then we propose a greedy based centralized scheduling to determine directional pilot transmission instances. We also propose a one-way randomized discovery, where we choose the directional transmission probabilities based on two techniques, an intuitive and an optimized methods. Finally, we provide simulation results that assess the performance the schemes.
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