Performance Analysis and Adaptive DRX Scheme for Dual Connectivity

Sharma, Lokesh; Kumar, B. Bikram; Wu, Shih‐Lin

doi:10.1109/jiot.2019.2937345

Cited by 23 publications

(10 citation statements)

References 41 publications

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“…In contrast, we focus on the pre-data arrival phase (i.e., no data arriving on the downlink), where we are interested in the outage probability, since an outage would lead to a loss of connectivity to the network. DRX in a multi-connectivity setting is addressed in [22], but for the relatively simple scenario of dual connectivity in LTE systems, where the links are not prone to blockinginduced outages. However, at mmWave and sub-THz frequencies, where blockages are a major impediment, the degree of multi-connectivity is an important system parameter that impacts both the UE performance as well as power consump-tion, especially at sub-THz frequencies where the frequency and severity of blockages are likely to be greater than that at mmWave.…”

Section: B Related Workmentioning

confidence: 99%

Power-Efficient Beam Tracking During Connected Mode DRX in mmWave and Sub-THz Systems

Shah

Aditya

Rangan

2021

IEEE J. Select. Areas Commun.

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Discontinuous reception (DRX), wherein a user equipment (UE) temporarily disables its receiver, is a critical power saving feature in modern cellular systems. DRX is likely to be aggressively used at mmWave and sub-THz frequencies due to the high front-end power consumption. A key challenge for DRX at these frequencies is blockage-induced link outages: a UE will likely need to track many directional links to ensure reliable multi-connectivity, thereby increasing the power consumption. In this paper, we explore bandit algorithms for link tracking in connected mode DRX that reduce power consumption by tracking only a fraction of the available links, but without adversely affecting the outage and throughput performance. Through detailed, system level simulations at 28 GHz (5G) and 140 GHz (6G), we observe that even sub-optimal link tracking policies can achieve considerable power savings with relatively little degradation in outage and throughput performance, especially with digital beamforming at the UE. In particular, we show that it is feasible to reduce power consumption by 75% and still achieve up to 95% (80%) of the maximum throughput using digital beamforming at 28 GHz (140 GHz), subject to an outage probability of at most 1%.

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Section: B Related Workmentioning

confidence: 99%

Power-Efficient Beam Tracking During Connected Mode DRX in mmWave and Sub-THz Systems

Shah

Aditya

Rangan

2021

IEEE J. Select. Areas Commun.

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“…In [14], the authors proposed the DADRX-AP mechanism that can not only dynamically adjust the DRX cycle but also adaptively adjust the parameters according to the traffic activity, and they performed simulations to verify the effectiveness of this mechanism based on Poisson traffic. In [15], the authors proposed another adaptive DRX sleep (SAS) scheme that synchronizes its short-/longsleep durations to make it suitable for active and background traffic that considers dual connectivity.…”

Section: B Drx In the Mtc Fieldmentioning

confidence: 99%

“…On the other hand, MTC traffic may contain diverse traffic types [10], [11], so traffic may vary more frequently than HTC traffic. To address this problem, the current research [12]- [15] has focused on modifying the mechanism that can dynamically change the DRX cycles based on the different MTC traffic activities; primarily, these methods first predict the next packet's arrival time and then dynamically change the DRX cycle to fit the prediction. Furthermore, in [16], the results show that precise prediction of the next packet's arrival time can lead to high energy savings by helping to significantly reduce the tail time.…”

Section: Introductionmentioning

confidence: 99%

“…However, previous works have limitations in that they assume a specific pattern for the packet arrival process to predict the next packet arrival time. For example, in [14], [15], the packet arrival time is assumed to follow a Poisson distribution, and the average packet arrival rate is estimated based on the previous traffic activities. In [12], [13], [17], [18], the conditional probability is updated using the previous packet arrival times, and the next packet arrival time is predicted using the statistical structure of the traffic arrival pattern.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive DRX Method for MTC Device Energy Saving by Using a Machine Learning Algorithm in an MEC Framework

Yang

Wang

et al. 2021

IEEE Access

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“…DRX in a multi-connectivity setting is addressed in [25], but for the relatively simple scenario of dual connectivity in LTE systems, where the links are not prone to blocking-induced outages.…”

Section: B Related Workmentioning

confidence: 99%

Power-efficient beam tracking during connected mode DRX in mmWave and sub-THz systems

Shah¹,

Aditya²,

Rangan³

2020

Preprint

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Discontinuous reception (DRX), wherein a user equipment (UE) temporarily disables its receiver, is a critical power saving feature in modern cellular systems. DRX is likely to be aggressively used at mmWave and sub-THz frequencies due to the high front-end power consumption. A key challenge for DRX at these frequencies is blockage-induced link outages: A UE will likely need to track many directional links to ensure reliable multi-connectivity, thereby increasing the power consumption. In this paper, we explore reinforcement learning-based link tracking policies in connected mode DRX that reduce power consumption by tracking only a fraction of the available links, but without adversely affecting the outage and throughput performance. Through detailed, system level simulations at 28 GHz (5G) and 140 GHz (6G), we observe that even sub-optimal link tracking policies can achieve considerable power savings with relatively little degradation in outage and throughput performance, especially with digital beamforming at the UE. In particular, we show that it is feasible to reduce power consumption by 75% and still achieve up to 95% (80%) of the maximum throughput using digital beamforming at 28 GHz (140 GHz), subject to an outage probability of at most 1%.

show abstract

Performance Analysis and Adaptive DRX Scheme for Dual Connectivity

Cited by 23 publications

References 41 publications

Power-Efficient Beam Tracking During Connected Mode DRX in mmWave and Sub-THz Systems

Power-Efficient Beam Tracking During Connected Mode DRX in mmWave and Sub-THz Systems

Adaptive DRX Method for MTC Device Energy Saving by Using a Machine Learning Algorithm in an MEC Framework

Power-efficient beam tracking during connected mode DRX in mmWave and sub-THz systems

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