Unnecessary handover minimization in two-tier heterogeneous networks

Alhabo, Mohanad; Zhang, Li

doi:10.1109/wons.2017.7888692

Cited by 17 publications

(9 citation statements)

References 8 publications

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“…When addressing the HO in 5G, existing works are usually divided in targeting the reduction of HOFs [3], [31], [62], reduction of HO rate [1], [63], [64], [65], or a combination of both [66]- [70], improving throughput or QoE of the user [1], [31], [71]- [77] and reduction of HO signaling [78], [79]. Other works are devoted to assess the energy saving [62], [80] and load balancing [62], [64].…”

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%

“…The works in [1], [63]- [65] are dedicated to reducing the HOR. HO skipping is a technique that skips some HOs along a high-speed user trajectory to reduce the number of HOs and improve user throughput at high speeds.…”

Section: B Literature Surveymentioning

confidence: 99%

A Survey on Handover Management: From LTE to NR

2019

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“…In this regard, several attempts have been made to reduce HOF and unnecessary handovers. A user/cell centric handover optimisation is adopted in [6]- [9]. The idea is that by knowing user mobility state and cell type, handover to small cell can be adaptive to avoid HOFs and ping-pongs.…”

Section: B Enhancements In Mobility Managementmentioning

confidence: 99%

Impact of Mobility on Communication Latency and Reliability in Dense HetNets

Kose

Han

Foh

et al. 2019

2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)

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One of the cutting edge requirements envisioned for next-generation mobile networks is to support ultra-reliable and low latency communication (URLLC), as well as to meet massive traffic demand in the next few years. Although network densification has been considered as one of the promising solutions to boost capacity and high throughput, the impact of mobility on latency and reliability in dense networks has not been well investigated. Moreover, handovers, especially in dense networks, can cause extra delay to the communication and degrade reliability performance. In this paper, we aim to analyse the impact of different handover hysteresis parameters on the performance metrics, such as end-to-end delay and packet loss ratio (PLR). In this regard, we compare latency and PLR performance around cell borders including the handover process with the overall period of simulation. Simulation results show that the impact of mobility becomes more significant in dense networks due to frequent exposure to cell borders and handovers.

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“…There have been a number of researches targeting the handover (HO) problem in the literature. We proposed a method to reduce the number of target SCs and reduce the unnecessary HOs in HetNet in [4]. The neighbour cell list (NCL) of the SCs is formed by utilizing the distance between the UE and the SC in addition to the angle of movement of the UE.…”

Section: Introductionmentioning

confidence: 99%

GRA‐based handover for dense small cells heterogeneous networks

2019

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Ultra-dense small cell (SC) deployment in future 5G network makes the architecture of the network as heterogeneous networks (HetNets). This is a good solution to boost the capacity of the network and extend its coverage. However, the dense SCs deployment has brought new challenges to the network including interference, frequent unnecessary handovers and handover failures. Therefore, user equipment (UE) will suffer from a degraded quality of service (QoS). In this paper, we propose a Grey Rational Analysis based handover method (GRA-HO) in dense SCs HetNet. The proposed method combines the Analytical Hierarchy Process (AHP) technique to obtain the weight of the handover metrics and the GRA method to rank the available cells for the best handover target. The performance of the proposed method is evaluated and compared with the traditional Multiple Attribute Decision Making (MADM) method including Simple Additive Weighting (SAW) and VIKOR methods. Results show that the GRA-HO method has outperformed the existing methods in terms of reducing the number of frequent handovers and link failures, in addition to enhancing the energy efficiency.

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Unnecessary handover minimization in two-tier heterogeneous networks

Cited by 17 publications

References 8 publications

A Survey on Handover Management: From LTE to NR

A Survey on Handover Management: From LTE to NR

Impact of Mobility on Communication Latency and Reliability in Dense HetNets

GRA‐based handover for dense small cells heterogeneous networks

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