标题： 设备到设备多播的能效和频谱效率权衡在底层蜂窝网络中 显示英文标题

标题： Energy- and Spectral- Efficiency Tradeoff for D2D-Multicasts in Underlay Cellular Networks

摘要： 在带内设备到设备（D2D）组播通信中，相同内容通过组内直接链路进行传播，有望提高蜂窝网络的频谱和能量效率。 然而，现有的大多数方法仅解决频谱效率（SE）或能量效率（EE）中的一个方面。 我们研究单小区D2D集成蜂窝网络中SE和EE之间的权衡，其中多个D2D组播组（MGs）可能与多个蜂窝用户（CUs）共享上行链路信道。 我们制定了在SE和最大可用传输功率约束下的EE最大化问题。 提出了一种功率分配算法来解决这个问题，并通过大量数值仿真验证了其有效性。 表征了SE和EE之间随D2D MG密度和MG最大传输功率变化的权衡。 显示英文摘要

摘要： Underlay in-band device-to-device (D2D) multicast communication, where the same content is disseminated via direct links in a group, has the potential to improve the spectral and energy efficiencies of cellular networks. However, most of the existing approaches for this problem only address either spectral efficiency (SE) or energy efficiency (EE). We study the tradeoff between SE and EE in a single cell D2D integrated cellular network, where multiple D2D multicast groups (MGs) may share the uplink channel with multiple cellular users (CUs). We formulate the EE maximization problem with constraint on SE and maximum available transmission power. A power allocation algorithm is proposed to solve this problem and its efficacy is demonstrated via extensive numerical simulations. The tradeoff between SE and EE as a function of density of D2D MGs, and maximum transmission power of a MG is characterized.