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首页> 外文期刊>Communications, IET >Joint resource allocation and power control for cellular and device-to-device multicast based on cognitive radio
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Joint resource allocation and power control for cellular and device-to-device multicast based on cognitive radio

机译：基于认知无线电的蜂窝和设备到设备多播的联合资源分配和功率控制

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摘要

Device-to-device (D2D) communication is an excellent technology for improving the system capacity through sharing the spectrum resources of cellular networks. Multicast service is considered an effective transmission mode for the future mobile social contact services. Therefore, multicast with D2D technology can improve the resource efficiency. In this paper, a resource allocation scheme based on cognitive radio (CR) for D2D underlay multicast communication (CR-DUM) is proposed to improve system performance. In each D2D multicast group of the cognitive cellular system, the secondary users reuse the different orthogonal cellular resources to accomplish a multicast transmission. To maximise the total system capacity under the condition of interference and noise impairment, the authors formulate an optimal transmitting power allocation for the cellular and D2D multicast communications jointly. The proposed scheme includes two steps. First, two channel allocation rules are proposed to reduce the interference from cellular networks to receivers in D2D multicast group. Second, the optimal power allocation is formulated as a non-linear programming problem and the optimal solution is achieved by searching from a finite set for the allocated channel. The simulation results show that the proposed method can ensure the quality of service (QoS) and improve the system capacity.
机译：设备到设备（D2D）通信是一项出色的技术，可通过共享蜂窝网络的频谱资源来提高系统容量。组播服务被认为是未来移动社交联系服务的有效传输模式。因此，采用D2D技术的组播可以提高资源效率。本文提出了一种基于认知无线电（CR）的D2D底层组播通信（CR-DUM）资源分配方案，以提高系统性能。在认知蜂窝系统的每个D2D多播组中，辅助用户重用不同的正交蜂窝资源来完成多播传输。为了在干扰和噪声损害的情况下最大化系统总容量，作者共同制定了蜂窝和D2D多播通信的最佳发射功率分配。提议的方案包括两个步骤。首先，提出了两个信道分配规则，以减少蜂窝网络对D2D多播组中的接收器的干扰。其次，将最佳功率分配公式化为非线性规划问题，并通过从有限集合中搜索分配的信道来获得最佳解决方案。仿真结果表明，该方法可以保证服务质量，提高系统容量。

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