Fast outer-loop link adaptation scheme realizing low-latency transmission in LTE-Advanced and future wireless networks

Ohseki, Takeo; Shimizu, Yasuhiro

doi:10.1109/rws.2016.7444346

Cited by 13 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…single control signal in order to configure radio bearers such as SRB1, SRB2 and DRBs, that decreases the signaling interaction rounds between the UE and the eNBs. In [87], a new outer-loop link adaptation (OLLA) scheme is proposed. The scheme controls the size of the compensation in the estimated SINR based on the time elapsed after a UE transits from an idle state to an active state, which helps to reduce latency for small packet applications.…”

Section: [80] Transmission Power Optimizationmentioning

confidence: 99%

See 1 more Smart Citation

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

Parvez

Rahmati

Güvenç

et al. 2018

IEEE Commun. Surv. Tutorials

748

395

View full text Add to dashboard Cite

The fifth generation (5G) wireless network technology is to be standardized by 2020, where main goals are to improve capacity, reliability, and energy efficiency, while reducing latency and massively increasing connection density. An integral part of 5G is the capability to transmit touch perception type real-time communication empowered by applicable robotics and haptics equipment at the network edge. In this regard, we need drastic changes in network architecture including core and radio access network (RAN) for achieving end-to-end latency on the order of 1 ms. In this paper, we present a detailed survey on the emerging technologies to achieve low latency communications considering three different solution domains: RAN, core network, and caching. We also present a general overview of 5G cellular networks composed of software defined network (SDN), network function virtualization (NFV), caching, and mobile edge computing (MEC) capable of meeting latency and other 5G requirements.

show abstract

Section: [80] Transmission Power Optimizationmentioning

confidence: 99%

“…The eNB sends only single control signal in order to configure radio bearers such as SRB1, SRB2 and DRBs, that decreases the signaling interaction rounds between the UE and the eNBs. [87] Outer-loop link adaptation (OLLA) scheme…”

Section: Case/areamentioning

confidence: 99%

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

Parvez

Rahmati

Güvenç

et al. 2018

IEEE Commun. Surv. Tutorials

748

395

View full text Add to dashboard Cite

show abstract

“…This collected data is shown in Figure 5. The ECA (δ) calculation is executed for each frame and can be determined using (1).…”

Section: System Model and Performance Evaluationmentioning

confidence: 99%

“…Many algorithms use statistics based on errors to establish these breaking points, such as Bit Error Rate (BER) or Block Error Rate (BLER), which is paradoxical when it comes to finding high levels of reliability. The ACK/NACK signals, used in Hybrid Automatic Repeat Request (HARQ) scheme [1], [2], can be used to identify the breaking point SINRs, but this procedure also depends on a high error rate prospect. There are several approaches available in the literature to estimate the SINR using data-aided (DA) classes [3], [4], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

A Novel Technique for Link Adaptation Based on Inner Receiver Statistics

Kagami¹,

Figueiredo²,

Lopes³

et al. 2022

Anais Do XL Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

View full text Add to dashboard Cite

The fast-moving evolution of new technologies is driving the future mobile networks to a challenging pursuit for high throughput and reliability. Emerging services will need precise indicators to address contrasting requisites and link adaptation is a cardinal element. The received signal measurements must provide complete information to perform appropriate and timely decisions. Most communication systems employ statistics based on error rates, but it is not sufficient to accomplish all requirements. Additional information is necessary to define the best parametrization for each application. This paper indicates an approach to achieve this goal by monitoring processes directly into the physical layer decoding.

show abstract

“…The eOLLA scheme was shown to achieve better stability and modest throughput gains compared to classical OLLA. In [20], the step size was initialized with a large value that was then decayed exponentially with the time that a data flow was active. However, the channel variation profiles and data flow characteristics vary with time and across cellular deployments.…”

Section: A Outer Loop Link Adaptationmentioning

confidence: 99%

Reinforcement Learning for Efficient and Tuning-Free Link Adaptation

Saxena¹,

Tullberg²,

Jaldén³

2020

Preprint

View full text Add to dashboard Cite

Link adaptation (LA) optimizes the selection of modulation and coding schemes (MCS) for a stochastic wireless channel. The classical outer loop LA (OLLA) tracks the channel's signal-to-noiseand-interference ratio (SINR) based on the observed transmission outcomes. On the other hand, recent Reinforcement learning LA (RLLA) schemes sample the available MCSs to optimize the link performance objective. However, both OLLA and RLLA rely on tuning parameters that are challenging to configure.Further, OLLA optimizes for a target block error rate (BLER) that only indirectly relates to the common throughput-maximization objective, while RLLA does not fully exploit the inter-dependence between the MCSs. In this paper, we propose latent Thompson Sampling for LA (LTSLA), a RLLA scheme that does not require configuration tuning, and which fully exploits MCS inter-dependence for efficient learning. LTSLA models an SINR probability distribution for MCS selection, and refines this distribution through Bayesian updates with the transmission outcomes. LTSLA also automatically adapts to different channel fading profiles by utilizing their respective Doppler estimates. We perform simulation studies of LTSLA along with OLLA and RLLA schemes for frequency selective fading channels. Numerical results demonstrate that LTSLA improves the instantaneous link throughout by up to 50% compared to existing schemes.

show abstract

Fast outer-loop link adaptation scheme realizing low-latency transmission in LTE-Advanced and future wireless networks

Cited by 13 publications

References 5 publications

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

A Novel Technique for Link Adaptation Based on Inner Receiver Statistics

Reinforcement Learning for Efficient and Tuning-Free Link Adaptation

Contact Info

Product

Resources

About