Energy Efficiency and Superlative TTT for Equitable RLF and Ping Pong in LTE Networks

Kanwal, Kapil; Safdar, Ghazanfar Ali

doi:10.1007/s11036-018-1064-5

Cited by 8 publications

(8 citation statements)

References 13 publications

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“…When addressing HO in LTE, existing works are usually divided into targeting the reduction of RLF [34], reduction of ping-pongs (PPs) [35], or a combination of both [36]- [38], reduction of HO rate [23], [30], [39], and reduction of HOFs [23], [40], [41]. Other works are devoted to finding the signaling overheads and the power consumption during HO [42], assess the energy-saving [13], [36], load balancing [43], the impact of inter-site distance (ISD) [26], [44], and UE speed [26] on the HO process.…”

Section: B Literature Surveymentioning

confidence: 99%

Section: B Literature Surveymentioning

confidence: 99%

“…The techniques to reduce both, the RLFs and PPs are presented in [36]- [38]. A reduced early HO scheme was proposed in [36] to reduce the RLF and PPs and achieve high energy efficiencies, at the cost of keeping the other performance parameters within acceptable limits. A fuzzy multiple criteria cell selection scheme was proposed in [37] that consider UE UL conditions, resource block utilization in addition to s-criteria of LTE conventional cell selection method.…”

Section: B Literature Surveymentioning

confidence: 99%

“…To make the HO process energy efficient, the works in [13], [36] are devoted to reducing energy consumption that has a direct impact on CO 2 emissions and operational expenditure of the operator. A reduced early HO with bandwidth expansion scheme was proposed in [13] to enhance energy saving.…”

Section: B Literature Surveymentioning

confidence: 99%

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A Survey on Handover Management: From LTE to NR

2019

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To satisfy the high data demands in future cellular networks, an ultra-densification approach is introduced to shrink the coverage of base station (BS) and improve the frequency reuse. The gain in capacity is expected but at the expense of increased interference, frequent handovers (HOs), increased HO failure (HOF) rates, increased HO delays, increase in ping pong rate, high energy consumption, increased overheads due to frequent HO, high packet losses and bad user experience mostly in high-speed user equipment (UE) scenarios. This paper presents the general concepts of radio access mobility in cellular networks with possible challenges and current research focus. In this article, we provide an overview of HO management in longterm evolution (LTE) and 5G new radio (NR) to highlight the main differences in basic HO scenarios. A detailed literature survey on radio access mobility in LTE, heterogeneous networks (HetNets) and NR is provided. In addition, this paper suggests HO management challenges and enhancing techniques with a discussion on the key points that need to be considered in formulating an efficient HO scheme. INDEX TERMS Radio access mobility, cell selection, handover, LTE, 5G, NR, mobility enhancers. Ph.D. degree in electrical engineering with Aalto University, Finland. He has more than two years, from 2013 to 2015, of professional experience as an RF Planning and Optimization Executive at Wi-Tribe Pakistan Ltd. (Ooredoo Group). During his stay at KFUPM, he was associated with the King Abdullah University of Science and Technology (KAUST), Saudi Arabia, as a Visiting Student and a KFUPM-KAUST Joint Research Initiative. He has been a Researcher with the Helsinki Research Center, Huawei Technologies Finland Oy, since February 2018. His current research interest includes energy-efficient mobility for small-cell overlaid cellular networks. He received the Gold Medal Award for obtaining the first position in the B.Sc. degree. XAVIER GELABERT received the M.Sc. degree in electrical engineering from the KTH Royal Institute of Technology, Stockholm, in 2003, and the joint B.Sc. and M.Sc. degrees in telecom engineering and the Ph.D. degree (Hons.

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Section: B Literature Surveymentioning

confidence: 99%

Section: B Literature Surveymentioning

confidence: 99%

Section: B Literature Surveymentioning

confidence: 99%

Section: B Literature Surveymentioning

confidence: 99%

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A Survey on Handover Management: From LTE to NR

2019

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“…The algorithm classifies too early, too late, and wrong cell HO failure categories and optimizes the HO parameters according to the dominant failure. An early HO procedure is proposed in [15] to reduce the RLF, ping pong events and energy consumption, at the cost of keeping the other performance parameters within acceptable limits. A HO skipping technique for 4G and 5G systems is proposed in [16] to reduce the HO rate.…”

Section: B Related Workmentioning

confidence: 99%

Uplink Reference Signals for Energy-Efficient Handover

et al. 2020

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The ever-growing data rate demand from cellular users increases the associated power consumption that directly contributes to the global warming of the environment. Also, achieving high system capacity by increasing the density of the base stations (BSs) increases the number of handovers (HOs) which for moderate-to-high-speed users implies significant signaling traffic overhead. One of the key research objectives of this paper is to identify the different signaling overheads occurring during the HO procedure in current 3GPP cellular networks (e.g. Long Term Evolution (LTE)/ New Radio (NR)) and, among those, which are the main contributors to power consumption. Specifically, we analyze the impact of signaling messages transmitted and received during HO on the power consumption for both the BS and the User Equipment (UE). System-level simulations are performed for a detailed quantitative analysis. Our analysis shows that the transmission of the measurement reports is the largest contributor to air-interface signaling and that its contributed total power consumption is higher than the random access channel (RACH) signaling and the signaling confirming the HO. To eliminate measurement reports and effectively reduce the power consumption associated with the HO in future networks, we propose a HO procedure that exploits uplink (UL) reference signals (RSs), namely the sounding reference signal (SRS), transmitted by UEs. The numerical results show that the proposed SRS-based method reduces the total power consumption during the HO procedure by 30% in comparison to the legacy downlink RS based measurement method in current cellular networks. Also, this method improves the UE battery lifetime by reducing the RS transmissions and measurements significantly, UE transmitted power consumption by 48% and received power consumption by 27%.

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Handover triggering estimation based on fuzzy logic for LTE-A/5 G networks with ultra-dense small cells

Haghrah

Niya

et al. 2023

Soft Comput

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Energy Efficiency and Superlative TTT for Equitable RLF and Ping Pong in LTE Networks

Cited by 8 publications

References 13 publications

A Survey on Handover Management: From LTE to NR

A Survey on Handover Management: From LTE to NR

Uplink Reference Signals for Energy-Efficient Handover

Handover triggering estimation based on fuzzy logic for LTE-A/5 G networks with ultra-dense small cells

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