What is the Value of Limited Feedback for Next Generation of Cellular Systems?

Behjati, Mehran; Mazlan, M. Hasbullah; Ramly, Athirah Mohd; Nordin, Rosdiadee; Ismail, Mahamod

doi:10.1007/s11277-019-06777-1

Cited by 9 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, such exhaustive data transmission needs massive backhaul with low latency. In addition, 6G requires flexible spectrum access, high-resolution channel state information (CSI), and precoding for distributed mMIMO, high-capacity uplink, higher network capacity and quality for mobile cloud XR, and low-power, high-precision positioning [42][43][44]. Another connectivity target of 6G is to overcome the digital divides, where everybody, irrespective of their location, has decent access to the network services.…”

Section: Requirements Of 6gmentioning

confidence: 99%

Revolution or Evolution? Technical Requirements and Considerations towards 6G Mobile Communications

Alraih

Shayea

Behjati

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

Ever since the introduction of fifth generation (5G) mobile communications, the mobile telecommunications industry has been debating whether 5G is an “evolution” or “revolution” from the previous legacy mobile networks, but now that 5G has been commercially available for the past few years, the research direction has recently shifted towards the upcoming generation of mobile communication system, known as the sixth generation (6G), which is expected to drastically provide significant and evolutionary, if not revolutionary, improvements in mobile networks. The promise of extremely high data rates (in terabits), artificial intelligence (AI), ultra-low latency, near-zero/low energy, and immense connected devices is expected to enhance the connectivity, sustainability, and trustworthiness and provide some new services, such as truly immersive “extended reality” (XR), high-fidelity mobile hologram, and a new generation of entertainment. Sixth generation and its vision are still under research and open for developers and researchers to establish and develop their directions to realize future 6G technology, which is expected to be ready as early as 2028. This paper reviews 6G mobile technology, including its vision, requirements, enabling technologies, and challenges. Meanwhile, a total of 11 communication technologies, including terahertz (THz) communication, visible light communication (VLC), multiple access, coding, cell-free massive multiple-input multiple-output (CF-mMIMO) zero-energy interface, intelligent reflecting surface (IRS), and infusion of AI/machine learning (ML) in wireless transmission techniques, are presented. Moreover, this paper compares 5G and 6G in terms of services, key technologies, and enabling communications techniques. Finally, it discusses the crucial future directions and technology developments in 6G.

show abstract

Section: Requirements Of 6gmentioning

confidence: 99%

Revolution or Evolution? Technical Requirements and Considerations towards 6G Mobile Communications

Alraih

Shayea

Behjati

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…Interference is one of the inherited issues of cellular networks which has been widely studied, and a rich set of advanced interference mitigation solutions have been developed especially for LTE networks overthe last decade [ 47 ]. Drones generate more uplink interference to neighbor cells while experiencing more downlink interference from those cells.…”

Section: Reflection: Practical Challenges and Solutionsmentioning

confidence: 99%

Mobile Network Performance and Technical Feasibility of LTE-Powered Unmanned Aerial Vehicle

Zulkifley

Behjati

Nordin

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

Conventional and license-free radio-controlled drone activities are limited to a line-of-sight (LoS) operational range. One of the alternatives to operate the drones beyond the visual line-of-sight (BVLoS) range is replacing the drone wireless communications system from the conventional industrial, scientific, and medical (ISM) radio band to a licensed cellular-connected system. The Long Term Evolution (LTE) technology that has been established for the terrestrial area allows command-and-control and payload communications between drone and ground station in real-time. However, with increasing height above the ground, the radio environment changes, and utilizing terrestrial cellular networks for drone communications may face new challenges. In this regard, this paper aims to develop an LTE-based control system prototype for low altitude small drones and investigate the feasibility and performance of drone cellular connectivity at different altitudes with measuring parameters such as latency, handover, and signal strength. The measurement results have shown that by increasing flight height from ground to 170 m the received signal power and the signal quality levels were reduced by 20 dBm and 10 dB respectively, the downlink data rate decreased to 70%, and latency increased up to 94 ms. It is concluded that although the existing LTE network can provide a minimum requirement for drone cellular connectivity, further improvements are still needed to enhance aerial coverage, eliminate interference, and reduce network latency.

show abstract

“…IMT Advanced channel model is geometry based stochastic channel model. It was proposed for the assessments for radio interface advances [23] [13], [20].…”

Section: Channel Modelsmentioning

confidence: 99%

“…In stage 2, the first hand-off deciphers the sign it gets from source, re-encode and send it to other (second for our situation) transfer and the goal. Second transfer joins the got sign from the source and the first hand-off utilizing a maximal-proportion combiner (MRC) as pursue (23) Where is the channel fading coefficient between the 1st and the 2nd relay, denotes the signal received at the 2nd relay from the 1st relay, and can be modeled as (24) Where is the power transmitted at relay 1, finally in phase (N + 1),…”

Section: Figure8: Illustration Of Multi Relay Cooperation [5]mentioning

confidence: 99%

Performance Optimal for Deploying Relays in Urban Micro Cells on LTE-Advanced Technology

Saif*,

Ismail,

Nordin

et al. 2020

IJITEE

View full text Add to dashboard Cite

Cooperative Relay is a promising enhancement to modern radio technologies which has been considered in LTE-Advanced and IEEE 802.16m technologies. Cooperative Relay is one of the technologies that used to improve coverage in downlink mobile network. The work is done by designing numerous environments for LTE-Advanced networks involving relays, whereby using vertical distributions of relays for both AAF & DAF techniques as well as comparison between the performances optimal of both techniques on urban micro cell for LTE-Advanced Technologies, Insertion the channel model from WINNER project. The performances optimal of non-Cooperative Relay and Cooperative Relay are evaluated in terms of Symbol Error Rate (SER) and Signal-to Noise-Ratio (SNR). The simulation results show that relay technologies can effectively improve system performance. On the other hand, 10-Relay in vertical distributions clearly shows outperforms on other environments and, when the relay put near, middle and far from Evolved Node B (eNB), the result shows at SER of 10-3 the system that employs AAF technique outperforms on the system that employs DAF technique in LTE-A system by about 6.5 dB, 2.5 dB and 2 dB sequent.

show abstract

What is the Value of Limited Feedback for Next Generation of Cellular Systems?

Cited by 9 publications

References 32 publications

Revolution or Evolution? Technical Requirements and Considerations towards 6G Mobile Communications

Revolution or Evolution? Technical Requirements and Considerations towards 6G Mobile Communications

Mobile Network Performance and Technical Feasibility of LTE-Powered Unmanned Aerial Vehicle

Performance Optimal for Deploying Relays in Urban Micro Cells on LTE-Advanced Technology

Contact Info

Product

Resources

About