Technical Documents

NGMN Overview on 5G RAN Functional Decomposition

The 5G RAN decomposition allows for a wide range of 5G services requirements to be met by allowing for RAN functionality to be split into centralised and distributed locations. There is a trade-off in terms of performance, complexity, flexibility, and transport demands that can allow an operator to decide what RAN decomposition(s) to deploy. This work provides an overview of the various RAN functional split options and their relative trade-offs. This work also provides an overview of the various industry activities that together form a toolbox enabling an operator to deploy the RAN functional split(s) of their choice. The functional split options can broadly be classified as either a high layer split (HLS) or a low layer split (LLS). The HLS is progressing as a work item within 3GPP. An overview of the 3GPP activities related to the HLS is provided here. For the LLS, the story is less mature, but still making significant progress. Many industry groups including, 3GPP, eCPRI, xRAN, TIP, TTA, SCF, IEEE 1914, IEEE 802.1CM, are working on parts of the puzzle and specifications are already available or soon to be available from many of these groups. The final part of this document provides an overview of how these various aspects related to the LLS are developing....

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5G End-to-End Architecture Framework v2.0

This document delineates the requirements in terms of entities and functions that characterise the capabilities of an E2E (end-to-end) framework. Architectural perspectives and considerations associated with the service categories - eMBB, mIoT, URLLC - envisioned for 5G (Fifth Generation) underscore the delineation of the E2E framework requirements. These requirements are intended as guidance in the development of inter-operable and market enabling specifications for a 5G ecosystem. This version resolves the outstanding Security and Identity management issues from the first published version, adds new references associated with those parts, and makes no changes to the other sections.

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Definition of the Testing Framework for the NGMN 5G Pre-Commercial Network Trials

This document focuses on the pre-commercial network trials phase of the NGMN 5G Trial & Testing Initiative which has the following scope: Developing a testing framework for 5G New Radio (NR), as developed by 3GPP, allowing the harmonization of the testing methodologies between the different parties conducting trials. Devising a strategy for the trials activities to guarantee efficiency and success of the different trials activities. Testing 5G capabilities in realistic conditions with pre-commercial equipment.

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5G Security – Package 3: Mobile Edge Computing / Low Latency / Consistent User Experience

NGMN has updated its report “5G Security – Package 3: Mobile Edge Computing / Low Latency / Consistent User Experience”. The original version was published in 2016. The most significant updates, in sections 1.10.2 and 2.2.2, have been made in response to constructive feedback received from ETSI TC LI, and concern the interplay of law enforcement (lawful interception, data retention etc) with edge computing and low latency solutions. We also recognise the new terminology “Multi-Access Edge Computing”.

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Service-Based Architecture in 5G

In March 2017, the project on “Service-based architecture in 5G” was launched. The main target of this work group was to investigate high-level requirements, use cases and guidelines for how operators can efficiently introduce and operate a service-based 5G network, i.e., Identify high-level requirements or guidelines on Service-based architecture design in 5G including network function, interface/protocol, API design principle; Investigate how operators can leverage Service-based architecture in 5G in the best way, e.g., customized network slicing, updating and managing network feature dynamically. Samples, possible approaches and guideline are expected Investigate how the Service-based architecture can enable network exposure, e.g., expose network and function capabilities to third parties for value-added services. This White Paper calls for the industry on standardisation, development and promotion of service-based 5G architecture.

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5G Extreme Requirements: Operators’ Views on Fundamental Trade-Offs

The aim of this work is to highlight what implications and trade-offs related to the delivery of new 5G services are relevant for mobile network operators. Some of these new services, in fact, require extremely low latency and high reliability of the communication link, which have very little in common with the targets that the telecommunications industry has worked towards until today. Mobile cellular networks have in fact traditionally been designed and optimised for the delivery of good voice and data services for mobile broadband customers, so the new 5G requirements now call for a re-think on how the future network will have to be designed and optimised in order to enable the new services. The purpose of this document is to outline relevant trade-offs that need to be taken into account when delivering 5G services. In particular, the interplay among coverage, packet size, data rate, latency, and reliability, is analysed.  

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Liaison Statement on Technology Evaluation of LTE-V2X and DSRC

The intention of the liaison statement from the NGMN V2X Task-Force to the 5GAA is to inform 5GAA of evaluation results summary on link level simulation (LLS) and system level simulation (SLS) for LTE-V2X performance compared with DSRC performance.

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5G E2E Architecture Framework

The purpose of this document is to provide a high-level framework of architecture principles and requirements that provide guidance and direction for NGMN partners and standards development organisations in the shaping of the 5G suite of interoperable capabilities, enablers, and services. It builds on the architectural concepts and proposals implied by the NGMN 5G White Paper and subsequent deliverables published by NGMN. It is anticipated that this document will have versions, beyond an initial version, to reflect additional forward-looking requirements and/or updates as needed.  The elements of functional virtualisation, shift of computing to the edges of the network, and leveraging of spectrum distribution and flexibility, are among the dominant themes that shape the 5G ecosystem. Optimisation of operational and performance efficiencies, while creating and delivering an exceptional and customisable user experience is of paramount significance.

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