Energy Efficiency of D2D Multi-User Cooperation

Abstract

The Device-to-Device (D2D) communication system is an important part of heterogeneous networks. It has great potential to improve spectrum efficiency, throughput and energy efficiency cooperation of multiple D2D users with the advantage of direct communication. When cooperating, D2D users expend extraordinary energy to relay data to other D2D users. Hence, the remaining energy of D2D users determines the life of the system. This paper proposes a cooperation scheme for multiple D2D users who reuse the orthogonal spectrum and are interested in the same data by aiming to solve the energy problem of D2D users. Considering both energy availability and the Signal to Noise Ratio (SNR) of each D2D user, the Kuhn-Munkres algorithm is introduced in the cooperation scheme to solve relay selection problems. Thus, the cooperation issue is transformed into a maximum weighted matching (MWM) problem. In order to enhance energy efficiency without the deterioration of Quality of Service (QoS), the link outage probability is derived according to the Shannon Equation by considering the data rate and delay. The simulation studies the relationships among the number of cooperative users, the length of shared data, the number of data packets and energy efficiency.

Social-Aware Relay Selection for Cooperative Multicast Device-to-Device Communications

“…Unfortunately, when D2D users cooperate, the devices acting as relays expend extraordinary energy for data transmissions, even over short distances. Hence, it is necessary to select D2D relays among multiple devices by considering whether a device has already been selected as a relay many times or if it has to handle too many cooperative users to avoid excessive energy consumption of the relay and to decrease the life-time of the system [7].…”

A Two-Layer, Energy-Efficient Approach for Joint Power Control and Uplink–Downlink Channel Allocation in D2D Communication

“…The energy consumption of a whole communication process includes computing [15], storage [16], and transmission [17]. We pay more attention to the last one, namely the extensive transmission energy consumption.…”

Trellis Tone Modulation Multiple-Access for Peer Discovery in D2D Networks

“…D2D communication can solve the traffic overload problem by distributing concentrated traffic to the core network. Thus, D2D communications have attracted attention and have been actively studied in academia and industry [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. Already, the 3rd Generation Partnership Project (3GPP) has been standardized as Proximity Services (ProSe) [ 11 , 12 , 13 , 14 ] and Sidelink [ 15 ] to include D2D communication functions.…”