Page 130 - Kaleidoscope Academic Conference Proceedings 2024

2024 ITU Kaleidoscope Academic Conference

The remainder of this paper is organized as follows. Section Table 1 shows the ITU-T Recommendations related to
2 reviews related standardization efforts, research, and FMSC recently developed by ITU-T Study Group 13.
development activities. Section 3 provides an overview of Approved in 2022, ITU-T Y.3200 delineates FMSC
INCA functions and control message flow sequences requirements, categorizing them into service and network
abstracted from ITU-T Y.3207. Section 4 details the capability requirements. It also outlines FMSC use case
development of the experimental system. Section 5 scenarios within the context of IMT 2020 (or 5G) networks
discusses demonstrations of INCA capabilities for and beyond. Similarly, ITU-T Y.3201 specifies the
configuring network services and monitoring and comprehensive framework for land-based and satellite-
controlling resources. Finally, Section 6 concludes the based converged networks. It enumerates enabling
paper and outlines future work. technologies, including mobility management, session
2. RELATED WORK management, connection management, subscription
Non-terrestrial networks, including satellites, HAPS, and management, service continuity, traffic scheduling, network
drones, offer widespread access to high-quality slicing, multi-access edge computing, artificial intelligence
communication services due to their global coverage and (AI) and machine learning (ML), distributed ledger
robust multilink transmission capabilities. High-throughput technology (DLT), and quantum information technology.
satellites (HTS) are being deployed to expand the small cell ITU-T Y.3202 describes the scenario and framework for
coverage capacity of urban 5G systems to rural and remote mobility management in FMSC, detailing related
areas. The extensive deployment of low-earth orbit (LEO) requirements, architecture, and service procedures. ITU-T
satellites, positioned approximately 400-2000 kilometers Y.3203 specifies the requirements, scenarios, and
from the Earth's surface, enables the provision of high- functional architecture for connection management in
bandwidth, low-latency communication services to support FMSC. Furthermore, ITU-T Y.3204 specifies scenarios,
various applications of the eMBB, mMTC, and URLLC. requirements, enablers, network function enhancements,
Research, development, and standardization of innovative and procedures for service continuity in FMSC, ensuring
technologies facilitating the convergence of TN and NTN ongoing services and their states for moving objects.
networks are advancing swiftly. This paper focuses on ITU-T Y.3205 delineates scenarios, general characteristics,
implementing a testbed system to validate the integrated requirements, and framework for the Integrated User-
network control architecture outlined in ITU-T centric Service Unit (IUSU), enabling end users to define
Recommendation Y.3207. To provide context, we offer an network and service capability profiles based on their needs.
overview of related ITU-T and 3GPP standard documents. ITU-T Y.3206 specifies scenarios, requirements, reference
Further details about related 3GPP activities can be found points, network function enhancements, and procedures for
in [2]. capability exposure in FMSC, allowing network functions
to expose their capabilities to third parties such as users or
other operators.
Table 1. FMSC-related ITU-T Recommendations
Rec. Title Year of Finally, ITU-T Y.3207 delineates the scenarios and
architectural frameworks of the integrated network control
No. approval
ITU-T Fixed, mobile and satellite convergence – 2022 system and the individual network segment control system.
It outlines procedures for designing and orchestrating
Y.3200 Requirements for IMT-2020 networks and
beyond network services spanning across TN and NTN segments,
ITU-T Fixed, mobile and satellite convergence – 2023 along with unified performance monitoring and resource
Y.3201 Framework for IMT-2020 networks and control. Further elaboration on its functional components
beyond and control message flow sequences is provided in the next
ITU-T Fixed, mobile and satellite convergence – 2023 section.
Y.3202 Mobility management for IMT-2020 3GPP started documentation of TN and NTN integration-
networks and beyond related study items from Release 15 for 5G systems, with
ITU-T Fixed, mobile and satellite convergence – 2023 the consideration on the deployment scenarios, service
Y.3203 Connection management for IMT-2020 requirements, satellite propagation models, and related
networks and beyond system parameters of satellites and HAPS. Release 16
ITU-T Fixed, mobile and satellite convergence – 2023 further added the architectural aspects of the integration of
Y.3204 Service continuity for IMT-2020 networks satellite access in the 5G system (TR 23.737 [7]) and
and beyond management and orchestration aspects (TR 28.808 [8]). TR
ITU-T Fixed, mobile and satellite convergence – 2023 23.737 has identified the impact areas and solutions
Y.3205 Requirements of integrated user-centric (including procedures) for resolving radio access and core
service units network-related issues. TR 28.808 has listed the service and
ITU-T Fixed, mobile and satellite convergence – 2023 network management issues of satellite-integrated 5G,
Y.3206 Capability exposure for IMT-2020 presented a reference architecture for management, and
networks and beyond listed the associated solutions. From Release 17, normative
ITU-T Fixed, mobile and satellite convergence – 2024 work on specifying solutions for additional aspects of NTN
Y.3207 Integrated network control architecture integration in 5G system architecture with New Radio (NR)
framework for IMT-2020 networks and and narrow-band IoT (NB-IoT) RAN coverages has begun
beyond
[9]. Future releases are being planned to enhance the

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