LTE-WiFi Carrier Aggregation for Future 5G Systems: A Feasibility Study and Research Challenges

Alkhansa, Rasha; Artail, Hassan; Gutierrez-Estevez, David M.

doi:10.1016/j.procs.2014.07.068

Cited by 32 publications

(15 citation statements)

References 1 publication

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“…To address the resource allocation in the WLAN small cell, the authors designed a small cell MAC protocol (SC-MAC) based on the PCF (Point Coordination Function) access mechanism. The feasibility and practical deployment possibility of integrated LTE-WLAN systems for the 5G mobile networks have been highlighted in [21]. They stated that the small cell BS and the WLAN BS are wired, or collocated within an integrated physical element, and can exchange through an interface such as the X2 interface.…”

Section: Related Work and Motivationmentioning

confidence: 99%

FD MAC Protocol Design for Co-Existing WLANs in 5G Cellular Networks

Diakité

Rizo

Bandiri

2021

J. Microw. Optoelectron. Electromagn. Appl.

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In this paper, we design full-duplex (FD) medium access control (MAC) protocol for co-existing wireless local area networks (WLANs) in 5G cellular networks (WCFD-MAC). Our design considers some significant features of 5G networks, exceptionally, beamforming and FD capabilities at both, the base station and user equipment. FD communications may generate interferences, namely self-interference (SI) in bidirectional FD (BFD) and interuser interferences in three-node FD (TNFD). Several efforts have been performed to mitigate the SI in BFD communications. However, the inter-user interferences in TNFD are still considered as a major drawback in FD networks. These interferences must be mitigated by an efficient MAC protocol design. WCFD-MAC protocol allows two neighboring users to simultaneously participate in TNFD communication without interfering with each other by using directional transmission and a three-node angle condition (TAC). Directional transmission combined with TAC increases system throughput. WCFD-MAC protocol allows a new half-duplex (HD) communication scheme referred to as three-node HD (TNHD). This scheme may occur when bidirectional FD (BFD) and TNFD communications cannot occur. TNHD scheme includes device-todevice (D2D) communication and allows energy efficiency, which is one of the keys requirements of 5G wireless networks. Simulations results show that WCFD-MAC protocol achieves higher throughput than existing works in the literature.

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Section: Related Work and Motivationmentioning

confidence: 99%

FD MAC Protocol Design for Co-Existing WLANs in 5G Cellular Networks

Diakité

Rizo

Bandiri

2021

J. Microw. Optoelectron. Electromagn. Appl.

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“…WiFi is an alternative radio access technology (RAT) that can be integrated into our proposed framework. One of the two basic functions in WiFi MAC layer is the Point Coordination Function (PCF) [17], which provides contention-free services by making the AP as a polling master for granting permissions to UEs in the range to transmit. PCF allows the CC to initiate the VHO in a timely manner (i.e., fitting well in our proposed framework) since the channel access delay induced by carrier-sense multiple access with collision avoidance (CSMA/CA) in distributed coordination function (DCF) can be avoided.…”

Section: System Modelmentioning

confidence: 99%

Optimizing Handover Parameters by Q-Learning for Heterogeneous Radio-Optical Networks

et al. 2020

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Existing literature studying the access point (AP)-user association problem of heterogeneous radio-optical networks either investigates quasi-static network selection or only considers vertical handover (VHO) dwell time from optical to radio. The quasi-static assumption can result in outdated decisions for highly mobile scenarios. Solely focusing on the optical to radio handover ignores the importance of dwell time for VHO from radio to optical. In this paper, we propose a flexible and holistic framework, that runs a self-optimizing algorithm at the centralized coordinator (CC). This CC resides in the LTE eNodeB and controls the handover parameters of all the visible light communication (VLC) APs under the coverage of the LTE eNodeB. Based on Q-learning approach, the algorithm optimizes the time-to-trigger (T T T) values for VHO between LTE and VLC. Case studies are performed to validate the considerable gain in terms of average throughput by optimizing T T T s. We evaluate the impact of learning parameters on the optimal throughput and convergence speed through trace-driven simulations. The simulation results reveal that the Q-learning based algorithm improves the average throughput of mobile device by 25% when compared to the fixed T T T scheme. Furthermore, this algorithm is capable of self-optimizing handover parameters in an online manner.

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“…Release 11 presented Intra-band non-contiguous CA, and Release 12 presented CA for Frequency Division Duplex (FDD) and Time Division Duplex (TDD). Release 13 presented CA for 5 GHz WiFi bands, called Licensed Assisted Access, and Release 14, which starts 5G standardization, defines more cases following the 5G adopted bands [26]. Some issues should be considered for Internet Protocol (IP) configuration, interference coordination and time synchronization.…”

Section: Carrier Aggregation (Ca)mentioning

confidence: 99%

Overview on 5G Radio Frequency Energy Harvesting

Hassani¹,

Hassani²,

Boutammachte³

2019

Adv. sci. technol. eng. syst. j.

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The current industrial landscape is becoming increasingly aware of the need to optimize energy use and management for all domains, including telecommunications. Among others, RF Energy Harvesting is a promising technique for 5G systems as an alternative to traditional energy supply sources. This paper presents 5G landscape and ecosystem. It positions RF-Energy Harvesting in 5G context and reviews its techniques. It also considers constraints and research trends for different aspects needed to make RF energy harvesting ready for deployment along with 5G enabling technologies.

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LTE-WiFi Carrier Aggregation for Future 5G Systems: A Feasibility Study and Research Challenges

Cited by 32 publications

References 1 publication

FD MAC Protocol Design for Co-Existing WLANs in 5G Cellular Networks

FD MAC Protocol Design for Co-Existing WLANs in 5G Cellular Networks

Optimizing Handover Parameters by Q-Learning for Heterogeneous Radio-Optical Networks

Overview on 5G Radio Frequency Energy Harvesting

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