Today’s heterogeneous wireless network (HWN) is a collection of ubiquitous wireless networking elements (WNEs) that support diverse functional capabilities and networking purposes. In such a heterogeneous networking environment, localization and mobility management will play a key role for the seamless support of emerging applications, such as social networking, massive multiplayer online gamin...

This paper investigates the physical layer security of inband underlay Device-to-Device (D2D) communication, where direct link between D2D users is not available. In this respect, optimal relay and suboptimal selections are utilized to secure transmission. The eavesdropper uses either maximal-ratio combining or selection increase wiretapped signals. secrecy performance analysis performed regard...

Device-to-device (D2D) communications have recently attracted broad attention, owing to its potential ability to improve spectrum and energy efficiency within the existing cellular infrastructure. Without sophisticated control, D2D users themselves are not powerful enough to resist eavesdropping or fight against security attacks. This work investigates how to select jamming partners for D2D use...

One goal of the fifth-generation (5G) cellular network is to support much higher data capacity (e.g., 1000 times higher than today), where device-to-device (D2D) communication is one of the key enabling technologies. In this paper, we focus on the D2D relaying functionality to improve cellular downlink throughput. Based on the shortages of the latest relevant work, we propose a new scheme that ...

This paper considers a resource allocation problem in device-to-device (D2D) communications sharing the same frequency spectrum. In particular, cellular users (CUs) utilize non-orthogonal multiple access (NOMA) while D2D (DUs) adopt orthogonal division (OFDMA). A multi-objective optimization (MOOP) is formulated, which jointly maximizes sum rate of DUs and CUs uplink taking into account maximum...

In this paper, we consider multicast device-to-device (D2D) direct communication underlaying cellular network where D2D multicast link reuses uplink frequency resources of cellular communication. We assume that a D2D multicast transmitter is equipped with multiple transmit antennas. Hence, well-known multiple antenna transmission schemes can be used in D2D multicast transmitter to reduce the in...

Recently there has been an increasing interest in applications that enable users in the proximity of one another to share experiences, discover surrounding events, play online games and in general develop proximity based social networks. Most of the existing applications are based on cellular network communications, combined with over-the-top (OTT) solutions involving either registration at an ...

In this paper, we consider secure device-to-device (D2D) direct communication in cellular networks for wiretap channel. We assume that D2D transmitter sends its data to desired D2D receiver by reusing frequency resources originally allocated to the cellular link transmission between a base station (BS) and a cellular user. When there is a single eavesdropper (ED) in wiretap channel, we propose ...