Mode switching for device-to-device communications in cellular networks

2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP) Pub Date : 2014-12-01 DOI:10.1109/GlobalSIP.2014.7032331

Daquan Feng, Guanding Yu, Y. Yuan-Wu, Geoffrey Y. Li, G. Feng, Shaoqian Li

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引用次数: 7

Abstract

Mode switching is one of the most important features of device-to-device (D2D) communications since it can bring more freedoms for potential D2D pairs. In this paper, we investigate optimal D2D mode switching to maximize the network spectrum-efficiency (SE). We formulate the optimal SE problems in three D2D transmission modes, dedicated mode, reusing mode and cellular mode, while guaranteeing the quality-of-service (QoS) requirements for both the D2D pairs and the regular cellular users (RCUs). Bisection algorithm is adopted to solve the quasiconvex optimization problems in the dedicated and cellular modes through transforming the original problem into a sequence of convex feasibility problems. For the reusing mode, concave-convex procedure (CCCP) is used to solve the difference of convex (D. C.) optimization problem. Simulation results show that system SE can be improved significantly with the proposed mode switching algorithm compared with the single mode transmission without mode switching.

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蜂窝网络中设备对设备通信的模式切换

模式切换是设备到设备(D2D)通信最重要的特性之一，因为它可以为潜在的D2D对带来更多的自由。在本文中，我们研究了最佳的D2D模式切换，以最大限度地提高网络频谱效率(SE)。在保证D2D对和普通蜂窝用户(rcu)的服务质量(QoS)要求的前提下，提出了专用模式、复用模式和蜂窝模式三种D2D传输模式下的最优SE问题。通过将原问题转化为一系列凸可行性问题，采用对分算法分别在专用模式和元胞模式下求解拟凸优化问题。对于重用模式，采用凹凸法(CCCP)求解凸差优化问题。仿真结果表明，与不进行模式切换的单模传输相比，该模式切换算法可显著提高系统SE。

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2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP)

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