Optimal Beamforming With Limited Feedback for Millimeter-Wave in-Band Full-Duplex Mobile X-Haul Network

Park, Jaehyun; Hong, Jun‐Pyo; Beak, Seungkwon

doi:10.1109/access.2018.2869900

Cited by 6 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, various advanced mixtures of FD and other new techniques were examined in the literature. To name a few, wireless power [13], [14], relaying [15]- [18], non-orthogonal multiple access (NOMA) [19], [20], deviceto-device (D2D) communications [21], [22], millimeter Wave (mmWave) [23], [24] and small cell [25]- [28], etc., can be combined with FD to further enhance the system performance.…”

Section: Introductionmentioning

confidence: 99%

Active Interference Cancellation for Full-Duplex Multiuser Networks With or Without Existence of Self-Interference

Lee

Huang

2019

IEEE Access

View full text Add to dashboard Cite

It is understood that in a network with an in-band full-duplex (FD) access point (AP) simultaneously serving multiple half-duplex clients, various kinds of interference may severely degrade the network spectral efficiency (SE). In this paper, we first address the problem of canceling the interclient interference (ICI) from multiple uplink clients to multiple downlink clients in such a scenario. The proposed ICI nulling approach, namely, multiuser ICI cancellation (MU-IC2), enables the AP to actively and completely eliminate the ICI for the downlink clients. With this method, the gain from FD processing can be achieved much efficiently. Design guideline is given and reduced-complexity implementation for use with a large number of antennas at the AP is also derived. Furthermore, in some circumstances, notable residual self-interference (SI) exists at the AP due to the imperfection of SI cancellation during the FD operation. This may enlarge the interference observed by the downlink clients. We provide new ways, i.e., two MU-SI-IC2 approaches, to deal with this case based on the possible knowledge of SI as well. As a result, both the SI-induced interference and ICI are effectively eliminated, and the overall throughput can still be benefited from FD and kept at a high level. The simulation results show that in terms of the network SE, our proposed MU-IC2 and MU-SI-IC2 can significantly outperform some baseline schemes and the state-of-the-art active ICI mitigation methods in various scenarios.

show abstract

Section: Introductionmentioning

confidence: 99%

Active Interference Cancellation for Full-Duplex Multiuser Networks With or Without Existence of Self-Interference

Lee

Huang

2019

IEEE Access

View full text Add to dashboard Cite

show abstract

“…The next chunk µ t+1 becomes the initial chunk of the new requesting content µ i+1,1 , which is randomly determined with the content popularity distribution. The user location (x usr,t+1 , y usr,t+1 ) is an independent random coordinate belonging to C. The caching sets are updated by the action a t in the same way as (7). • Reward: After taking action a t , it is able to obtain the reward…”

Section: A Problem Formulation With Mdpmentioning

confidence: 99%

“…As an effective architecture to deal with aforementioned challenges, cloud radio access network (C-RAN) has been considered in [4]- [7]. In C-RAN, the baseband processing for multiple distributed access points, called remote radio heads (RRHs), is conducted at a centralized baseband unit (BBU).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Learning-Based Joint User Association and Cache Replacement for Cache-Enabled Cloud RAN

Jeon,

Jung,

Lee

et al. 2024

IEEE Open J. Commun. Soc.

Self Cite

View full text Add to dashboard Cite

Mobile edge caching is regarded as a promising technology for reducing network latency and alleviating network congestion by efficiently offloading data traffic and computations to cache-enabled edge nodes. To fully leverage the benefits of edge caching, it is essential to jointly optimize caching and communication strategies, accounting for dynamic content request pattern and unstable nature of wireless mobile networks. Motivated by this, we study a joint cache replacement and user association strategy for minimizing the content delivery latency in cache-enabled cloud radio access network (C-RAN) where remote radio heads (RRHs) cache some contents for serving the content request without downloading the requested content from centralized baseband unit (BBU) via fronthaul. Unlike traditional cache placement strategies, our cache replacement facilitates gradual and timely updates while serving user content requests, without imposing additional network overhead. Specifically, whenever a user requests a content, BBU makes decisions on selecting a RRH for serving user request and on replacing the cached data of the selected RRH by taking into account the user location, cache status of RRHs, and impact on subsequent content deliveries. We optimize the selection of RRH to serve user request and the replacement of cached data by formulating a latency minimization problem using Markov Decision Process (MDP). This formulation considers the tradeoff between cache hit ratio and communication reliability. To develop an effective strategy for solving the MDP, we employ a deep reinforcement learning (DRL) algorithm and design a novel neural network structure and input feature map, specifically tailored to our problem domain. Simulation results show that the proposed approach learns effective strategy appropriate to a given environment, thereby outperforming not only the traditional rule-based strategies but also a typical DRL algorithm in terms of average latency. The proposed approach is shown to be relatively robust to time-variant content popularity by quickly adapting to new popularity distribution.

show abstract

Functional Split Perspectives: A Disruptive Approach to RAN Performance Improvement

Alimi

Monteiro

2019

Wireless Pers Commun

View full text Add to dashboard Cite

Optimal Beamforming With Limited Feedback for Millimeter-Wave in-Band Full-Duplex Mobile X-Haul Network

Cited by 6 publications

References 28 publications

Active Interference Cancellation for Full-Duplex Multiuser Networks With or Without Existence of Self-Interference

Active Interference Cancellation for Full-Duplex Multiuser Networks With or Without Existence of Self-Interference

Learning-Based Joint User Association and Cache Replacement for Cache-Enabled Cloud RAN

Functional Split Perspectives: A Disruptive Approach to RAN Performance Improvement

Contact Info

Product

Resources

About