On the Impact of Mode Selection on Effective Capacity of Device-to-Device Communication
On the Impact of Mode Selection on Effective Capacity of Device-to-Device Communication
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DOI：
10.1109/lwc.2019.2901460
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发表时间：
2019-01
影响因子：
6.3
通讯作者：
Syed Waqas Haider Shah;Muhammad Mahboob Ur Rahman;A. Mian;A. Imran;S. Mumtaz;O. Dobre
中科院分区：
文献类型：
--
作者：
Syed Waqas Haider Shah;Muhammad Mahboob Ur Rahman;A. Mian;A. Imran;S. Mumtaz;O. Dobre
考虑利用模式选择来在直接模式和蜂窝模式之间决定的设备到设备（D2 D）链路。这封信调查模式选择对有效容量（EC）的影响-在统计服务质量约束下的D2 D链路的D2 D链路的最大可持续恒定到达率的发射机的队列覆盖和覆盖场景。由于缺乏信道状态信息，发送设备以固定速率和固定功率发送数据;这一事实结合模式选择使得D2 D信道成为马尔可夫服务过程。因此，通过计算对应于马尔可夫D2 D信道的转移概率矩阵的条目来获得EC。数值结果表明，EC指数衰减（和重叠D2 D的增益超过重叠D2 D减小）的路径损耗测量的估计误差的模式选择所利用的增加。
Consider a device-to-device (D2D) link which utilizes the mode selection to decide between the direct mode and cellular mode. This letter investigates the impact of mode selection on effective capacity (EC)—the maximum sustainable constant arrival rate at a transmitter’s queue under statistical quality-of-service constraints—of a D2D link for both overlay and underlay scenarios. Due to lack of channel state information, the transmit device sends data at a fixed rate and fixed power; this fact combined with mode selection makes the D2D channel a Markov service process. Thus, the EC is obtained by calculating the entries of the transition probability matrix corresponding to the Markov D2D channel. Numerical results show that the EC decays exponentially (and the gain of overlay D2D over underlay D2D diminishes) with the increase in estimation error of the pathloss measurements utilized by the mode selection.