scholarly journals Social-Aware Peer Selection for Device-to-Device Communications in Dense Small-Cell Networks

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 670 ◽  
Author(s):  
Aamir Nadeem ◽  
Ho-Shin Cho
Keyword(s):  
Information Service ◽  
Base Station ◽  
Small Cell ◽  
Computational Time ◽  
Coverage Area ◽  
Peer Selection ◽  
Multiple User ◽  
Macro Cell ◽  
Device To Device ◽  
Cell Base

Device-to-device communications refer to the emerging paradigm that permits direct communication between cellular users that are in close physical and social proximity. It is expected to become an essential aspect of the future 5G cellular communications system. As a prerequisite for device-to-device communications, a user has to select another user in its proximity that has the desired information/service and is willing to share it. In this paper, we propose a method for peer selection in dense small-cell device-to-device networks that uses multi-attribute decision modeling. The method exploits both the physical and social characteristics of the user equipment to find the most suitable peer for device-to-device communications. We assume hexagonal small-cell and macro-cell architectures with a small-cell/macro-cell base station with multiple user equipments in its coverage area to evaluate the proposed scheme’s performance. The small-/macro-cell base station exploits various social and physical attributes to rank peers and selects the best one for device-to-device communication with the requesting user. The numerical results demonstrate the proposed algorithm’s efficiency in terms of computational time, selection of the best peer, throughput, and energy efficiency of device-to-device communications.

scholarly journals A Cost-Effective Wideband Switched Beam Antenna System for a Small Cell Base Station

2018 ◽  
Vol 66 (12) ◽  
pp. 6851-6861 ◽  
Author(s):  
Petros I. Bantavis ◽  
Christos I. Kolitsidas ◽  
Tzihat Empliouk ◽  
Marc Le Roy ◽  
B. Lars G. Jonsson ◽  
...  
Keyword(s):  
Cost Effective ◽  
Antenna System ◽  
Base Station ◽  
Small Cell ◽  
Cell Base

LTCC slot array antenna for 5G application

2019 ◽  
Vol 2019 (1) ◽  
pp. 000238-000242
Author(s):  
Hiroyuki Takahashi ◽  
Satoshi Hirano ◽  
Daisuke Yamashita
Keyword(s):  
Mobile Device ◽  
Beam Steering ◽  
Base Station ◽  
Small Cell ◽  
Array Antenna ◽  
Antenna Element ◽  
Beam Angle ◽  
Antenna Size ◽  
Antenna Module ◽  
Cell Base

Abstract We develop the antenna module substrate which is broadband and large gain using an LTCC technology in a 28GHz band in this study. We used LTCC materials (dielectric constant 5.8, Dielectric loss 0.002@28GHz) which we developed for materials originally. First of all, we confirmed ability of slot array antenna made by LTCC for 5G application to get broadband property. The structure of designed array antenna became 40mm × 3.2mm × t1.6mm. We confirmed that this antenna has wider bandwidth (2.2GHz) and higher gain (6dBi). But this antenna size is too large for applying mobile device. Therefore we redesigned to reduce antenna size without specification degradation. The structure of redesigned antenna element becomes basically 4.8mm × 6.7mm × t1.0mm. This antenna has wider bandwidth (2.7GHz). The gains are more than 5dBi for the characteristic of this element in a band. Assume this antenna a fabric; 2 × 2 (4 elements: for mobile device) and 4 × 4 (16 elements: for small cell base station) we make an array antenna for Small cell base station and for mobile device. We will evaluate a beam steering examination with emission properties (gain, beam angle).

Adaptive DC-DC converter for 4G macro-cell base station

2014 ◽  
Author(s):  
Jean-Marie Retrouvey ◽  
Philippe Maugars ◽  
Nguyen Trieu Luan Le ◽  
Philippe Descamps
Keyword(s):  
Base Station ◽  
Macro Cell ◽  
Cell Base

scholarly journals User Association and Small-Cell Base Station On/Off Strategies for Energy Efficiency of Ultradense Networks

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Jing Gao ◽  
Qing Ren ◽  
Pei Shang Gu ◽  
Xin Song
Keyword(s):  
Energy Efficiency ◽  
Optimization Method ◽  
Base Station ◽  
Small Cell ◽  
Base Stations ◽  
User Association ◽  
User Mobility ◽  
Efficient Design ◽  
Widespread Application ◽  
Cell Base

The widespread application of wireless mobile services and requirements of ubiquitous access have resulted in drastic growth of the mobile traffic and huge energy consumption in ultradense networks (UDNs). Therefore, energy-efficient design is very important and is becoming an inevitable trend. To improve the energy efficiency (EE) of UDNs, we present a joint optimization method considering user association and small-cell base station (SBS) on/off strategies in UDNs. The problem is formulated as a nonconvex nonlinear programming problem and is then decomposed into two subproblems: user association and SBS on/off strategies. In the user association strategy, users associate with base stations (BSs) according to their movement speeds and utility function values, under the constraints of the signal-to-interference ratio (SINR) and load balancing. In particular, taking care of user mobility, users are associated if their speed exceeds a certain threshold. The macrocell base station (MBS) considers user mobility, which prevents frequent switching between users and SBSs. In the SBS on/off strategy, SBSs are turned off according to their loads and the amount of time required for mobile users to arrive at a given SBS to further improve network energy efficiency. By turning off SBSs, negative impacts on user associations can be reduced. The simulation results show that relative to conventional algorithms, the proposed scheme achieves energy efficiency performance enhancements.

Adaptive DC-DC converter for efficient 4G macro-cell base station

2013 ◽  
Author(s):  
Jean-Marie Retrouvey ◽  
Philippe Maugars ◽  
Nguyen Trieu Luan Le ◽  
Philippe Descamps
Keyword(s):  
Base Station ◽  
Macro Cell ◽  
Cell Base
Sign in / Sign up

Export Citation Format

Share Document