Evaluating Conditional handover for 5G networks with dynamic obstacles

IF 4.5 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

Computer Communications Pub Date : 2025-01-21 DOI:10.1016/j.comcom.2025.108067

Souvik Deb , Megh Rathod , Rishi Balamurugan , Shankar K. Ghosh , Rajeev Kumar Singh , Samriddha Sanyal

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引用次数: 0

Abstract

To enhance seamless connectivity in millimetre wave New Radio networks, Conditional handover has evolved as a promising solution. Unlike A3 handover where handover execution is certain after receiving handover command from the serving access network, in Conditional handover, handover execution is conditional on Reference signal received power measurements from current and target access networks, as well as on handover parameters such as preparation and execution offsets. Presence of dynamic obstacles may block the signal from serving and (or) target access networks, which results in violation of the conditions for handover preparation/execution. Moreover, signal blockage by dynamic obstacles may cause radio link failure, which may cause handover failure as well. Analytic evaluation of Conditional handover in the presence of dynamic obstacles is quite limited in the existing literature. In this work, handover performance of Conditional handover has been analysed in terms of handover latency, handover packet loss and handover failure probability. A Markov model accounting the effect of dynamic obstacles, handover parameters (e.g., execution offset, preparation offset, time-to-preparation and time-to-execution), user velocity and channel fading characteristics has been proposed to characterize handover failure. Results obtained from the proposed analytic model have been validated against simulation results. Our study reveals that optimal configuration of handover parameters is actually conditional on the presence of dynamic obstacles, user velocity and fading characteristics. This study will be helpful for the mobile operators to configure handover parameters for New Radio systems where dynamic obstacles are present.

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来源期刊

Computer Communications 工程技术-电信学

CiteScore

14.10

自引率

5.00%

发文量

397

审稿时长

66 days

期刊介绍： Computer and Communications networks are key infrastructures of the information society with high socio-economic value as they contribute to the correct operations of many critical services (from healthcare to finance and transportation). Internet is the core of today''s computer-communication infrastructures. This has transformed the Internet, from a robust network for data transfer between computers, to a global, content-rich, communication and information system where contents are increasingly generated by the users, and distributed according to human social relations. Next-generation network technologies, architectures and protocols are therefore required to overcome the limitations of the legacy Internet and add new capabilities and services. The future Internet should be ubiquitous, secure, resilient, and closer to human communication paradigms. Computer Communications is a peer-reviewed international journal that publishes high-quality scientific articles (both theory and practice) and survey papers covering all aspects of future computer communication networks (on all layers, except the physical layer), with a special attention to the evolution of the Internet architecture, protocols, services, and applications.