Results 121 to 130 of about 1,832 (136)

Cognitive Heterogeneous Networks with Best Relay Selection over Unreliable Backhaul Connections

2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017
In this paper, we investigate the impacts of unreliable backhaul connections on cognitive heterogeneous networks with best relay selection. Since spectrum sharing is employed, the transmit powers of the small-cell transmitter and relays are constrained by the peak interference at the primary user, as well as their maximum transmit powers.
Huy T. Nguyen 0001, Trung Quang Duong, Octavia A. Dobre, Won-Joo Hwang   +3 more
openaire   +1 more source

Secrecy Performance of Small-Cell Networks over Nakagami-$m$ Fading in the Presence of Unreliable Backhaul and Imperfect CSI

2022 18th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), 2022
This paper investigates the impact of unreliable backhaul and channel estimation error on the performance of small-cell networks over independent and identically distributed Nakagami-m fading channels. To overcome the impact of these practical constraints, we propose an optimal selection scheme where the best small cell with respect to the maximal ...
Cheng Yin, Trung Q. Duong, Pei Xiao 0001
openaire   +2 more sources

FiWi enhanced LTE-A HetNets with unreliable fiber backhaul sharing and WiFi offloading

2015 IEEE Conference on Computer Communications (INFOCOM), 2015
To cope with the unprecedented growth of mobile data traffic, we investigate the performance gains obtained from unifying coverage-centric 4G mobile networks and capacity-centric fiber-wireless (FiWi) broadband access networks based on data-centric Ethernet technologies with resulting fiber backhaul sharing and WiFi offloading capabilities.
Hamzeh Beyranvand, Martin Lévesque 0001, Martin Maier 0001, Jawad A. Salehi   +3 more
openaire   +1 more source

Cooperative Cognitive Non-Orthgonal Multiple Access Under Unreliable Backhaul Connections

Mobile Networks and Applications, 2018
In this paper, we investigate the performance of energy-harvesting communications with decode-and-forward relay in the presence of non-orthogonal multiple access (NOMA) multiple access and cognitive radio spectrum sharing. We study three cases of single transmitter single relay and various transmitters and relays with two selection strategies (called ...
Dac-Binh Ha, Sang Quang Nguyen 0001, Huy T. Nguyen 0001   +2 more
openaire   +1 more source

Multi-User PD-NOMA with unreliable backhaul links in a multiple EH relay network over Nakagami-m fading channels

Physical Communication, 2021
Abstract In this paper, we analyze the performance of cooperative power-domain non-orthogonal multiple access systems (PD-NOMA) for multiple users in a multiple energy-harvesting (EH) relay network with unreliable backhaul links over Nakagami-m fading channels.
Le Thi Anh 0001, Hyung Yun Kong
openaire   +1 more source

Multiuser full-duplex relaying with unreliable backhauls under spectrum sharing environment

2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018
In this paper, we investigate the effect of unreliable wireless backhaul links on the outage performance for cognitive full-duplex relay (FDR) networks with best user selection over frequency-selective fading channels. Due to FDR operation, the primary user (PU) is interfered by the selected small-cell transmitter and FDR node simultaneously.
Hongwu Liu, Kyung Sup Kwak
openaire   +1 more source

Secrecy performance of finite-sized cooperative full-duplex relay systems with unreliable backhauls

IEEE Transactions on Signal Processing, 2017
This paper investigates secrecy performance of finite-sized cooperative full-duplex relay (FDR) systems with unreliable wireless backhaul connections across multiple transmitters under Nakagami- $m$ fading. Closed-form expressions for the secrecy outage probability and probability of nonzero achievable secrecy rate are derived in terms of self ...
Hongwu Liu, Kyeong Jin Kim, Theodoros A. Tsiftsis, Kyung Sup Kwak, H. Vincent Poor   +4 more
openaire   +1 more source

Multiuser Relay Networks Over Unreliable Backhaul Links Under Spectrum Sharing Environment

IEEE Communications Letters, 2017
The effects of unreliable backhaul links on cognitive relay networks with best user selection over Nakagami- $m$ fading are investigated. In particular, closed-form expressions for the critical performance metrics are derived along with the asymptotic performance to obtain insights into the impact of the backhaul reliability and multiuser ...
Huy T. Nguyen 0001, Trung Quang Duong, Won-Joo Hwang   +2 more
openaire   +2 more sources

Performance analysis of JT-CoMP transmission In Heterogeneous Network over unreliable backhaul

2015 International Conference on Electrical Engineering and Information Communication Technology (ICEEICT), 2015
In Heterogeneous Networks (HetNets) co-channel inter-cell interference (ICI) is a serious concern. Coordinated Multi-Point (CoMP) transmission has been emerged as a promising solution to downlink ICI in HetNets. But, the performance of CoMP transmission largely depends on the nature of backhaul network over which huge X2 signaling are executed among ...
Md. Shipon Ali, Mojaiana Synthia
openaire   +1 more source

Outage probability of energy harvesting relay systems under unreliable backhaul connections

2018 2nd International Conference on Recent Advances in Signal Processing, Telecommunications & Computing (SigTelCom), 2018
In this paper, the performance of energy harvesting systems in the presence of unreliable backhaul links is investigated over independent but not necessarily identically distributed (i.n.i.d.) Nakagami-m fading channels. In particular, the energy-constrained relay uses the amount of harvested energy from the best small-cell transmitter based on time ...
Huy T. Nguyen, Sang Quang Nguyen, Won-Joo Hwang   +2 more
openaire   +1 more source