A novel device-to-device discovery scheme for underlay cellular networks

Abstract

Tremendous growing demand for high data rate services such as video, gaming and social networking in wireless cellular systems, attracted researchers' attention to focus on developing proximity services. In this regard, device-to-device (D2D) communications as a promising technology for future cellular systems, plays crucial rule. The key factor in D2D communication is providing efficient peer discovery mechanisms in ultra dense networks. In this paper, we propose a centralized D2D discovery scheme by employing a signaling algorithm to exchange D2D discovery messages between network entities. In this system, potential D2D pairs share uplink cellular users' resources with collision detection, to initiate a D2D links. Stochastic geometry is used to analyze system performance in terms of success probability of the transmitted signal and minimum required time slots for the proposed discovery scheme. Extensive simulations are used to evaluate the proposed system performance.

Performance analysis of joint pairing and mode selection in D2D communications with FD radios

“…Although D2D discovery and its mechanisms could be considered as a part of pairing, we leave it as our future work. However, various D2D discovery mechanisms can be adopted to discover D2D pairs such as what have been suggested in [10]. Let us denote the distance between the typical UE and its transmitter by r d .…”

Full-duplex Device-to-Device collaboration for low-latency wireless video distribution

“…Each user randomly requests a video file from the library according to Zipf distribution. Technically, to schedule and establish a D2D connection, necessary signaling messages are needed to be exchanged between D2D pairs and the BS [10]. However, the signaling mechanisms do not affect our analysis in this work.…”

“…where P δ ui is the collaboration probabilities for δ mode, which is derived in equations (9) and (10). C δ ui is achievable capacity by establishing node u i in δ mode and can be calculated as…”

Performance analysis of inband FD-D2D communications with imperfect SI cancellation for wireless video distribution

“…Each user randomly requests a content from the library randomly, and according to Zipf distribution with exponent γ r . Although, the signaling mechanisms do not affect our analysis in this work, however, efficient D2D discovery mechanisms can be adopted to discover D2D pairs in an underlay cellular scenario [14]. According to the information of caches and UEs' requests, from D2D node establishment point of view, there are two different possible configurations for a D2D collaborating node; (i) half-duplex D2D (HD-D2D) mode with probability of P HD , in which an arbitrary user node within network can transmit a demanding video content to its respective receiver and (ii) full-duplex D2D (FD-D2D) mode with probability of P FD , in which any arbitrary node can operate in FD mode to receive its desired content and simultaneously serve for demanding video content at same time/frequency band (inband FD-D2D).…”