Abstract
Device-to-device (D2D) communications, as one of the promising technology for the future network, allow two devices in proximity to communicate directly with each other to alleviate the data traffic load for the base station (BS). In this paper, we analysis the joint relay selection and resource allocation scheme for relay-aided D2D communication networks. The objective is to maximize the total transmission data rates of the system while guaranteeing the minimum quality of service (QoS) requirements for both cellular users (CUs) and D2D users (DUs). We first propose a social-aware relay selection algorithm with low computational complexity to obtain the suitable relay nodes (RNs) for D2D links. Then the power control schemes are considered when a D2D link works in the D2D direct or relay mode to maximize the system transmission data rates. On basis of this, we propose a greedy-based mode selection and channel allocation algorithm, which can not only allocate the appropriate channel resource for D2D links, but also select the optimal communication mode for them. Numerical results demonstrate that the proposed scheme is capable of substantially improving the performance of the system compared with the other algorithms.
Highlights
Nowadays, along with the rapid development of wireless and mobile communication technology, the number of intelligent terminals has increased dramatically [1], [2]
We study the issue of joint realy selection and resource allocation for relay-assisted D2D communication networks in order to ameliorate the performance of the networks while satisfying the minimum quality of service (QoS) requirements for users
In this paper, we investigate the issue of joint relay selection and resource allocation for relay-assisted D2D communication networks
Summary
Along with the rapid development of wireless and mobile communication technology, the number of intelligent terminals has increased dramatically [1], [2]. In relay-assisted D2D communication, how to select proper D2D RNs and how to allocate the appropriate channel resource and transmit power are the critical issues to improve the system performance [13]. We study the issue of joint realy selection and resource allocation for relay-assisted D2D communication networks in order to ameliorate the performance of the networks while satisfying the minimum quality of service (QoS) requirements for users. A greedy-based mode selection and channel allocation algorithm is proposed, which can assign appropriate channel resource for D2D links, and select communication mode for D2D links flexibly according to the total transmission data rates. We propose a power control scheme to solve the optimum transmit power for both D2D direct mode and D2D relay mode to optimize the achievable end-to-end data rates of all cellular and D2D links.
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