TECHNICAL WORKING GROUP


Working Group Leaders

Mohammad SHAHBAZ (Chair), KPN/E-Plus

LOU Feifei (Vice-Chair), China Mobile

Joon Hyun SUNG (Vice-Chair), SK Telecom


Contact: Franck EMMERICH, NGMN Office (office(at)ngmn.org)


Scope & Objectives

According to the White Paper on Next Generation Mobile Networks beyond HSPA & EVDO the main objectives of the NGMN Alliance are:

  • To provide a vision for technology evolution beyond 3G for the competitive delivery of broadband wireless services to increase further end-customer benefits.
  • To establish clear performance targets, fundamental recommendations and deployment scenarios for a future wide area mobile broadband network, and to make sure that its price/performance ratio is competitive with alternative technologies.
  • To complement and support the work within standardisation bodies by providing a coherent view of what the operator community is going to require in the decade beyond 2010.

Technical Challenges of NGMN

These objectives involve great challenges in the technical area, and in fact, the NGMN White Paper lists a plenitude of requirements and recommendations on virtually all technical aspects of next generation mobile systems. Here we can just highlight a few of the most prominent requirements on NGMN technologies and systems (see also TECHNOLOGY / WHAT IS NGMN?):

  • Peak data rates in the downlink beyond 100 Mbit/s (> 40 Mbit/s cell average);
  • Peak data rates in the uplink beyond 50 Mbit/s;
  • Spectrum efficiency and cell throughput (capacity) 3 –  5 times better than 3G/HSPA and CDMA-2000/EVDO;
  • Low latencies (round-trip times) of 20 – 30 ms end-to-end;
  • Flat All-IP network architecture, with open interfaces, legacy interworking, optimised routing, and always-on support; §  Seamless mobility in indoor, pico/micro-cellular, metropolitan and wide-area deployment scenarios;
  • Easy and cost-efficient network deployment leveraging advanced self-organisation, self-configuration and self-optimisation techniques;
  • Flexible allocation of radio channel bandwidths in the range between 1.25 MHz and 20 MHz, utilising FDD and/or TDD duplex modes;
  • Operation in a wide range of frequency bands between 400 MHz and 5 GHz taking into account the ITU spectrum identified for IMT-2000 and IMT-Advanced systems;
  • High-performance, attractive, and affordable end-user devices.

Objectives of the Technical Working Group (TWG)

The Technical Working Group (TWG) of the NGMN Alliance addresses all technical aspects of next generation mobile networks, devices/terminals and services, including standardisation, industrialisation and testing aspects. The TWG pursues the following four high-level objectives:

  • To ensure that the relevant technical standards meet the requirements and recommendations of NGMN and are finalised in time to enable initial commercial deployment of NGMN systems and services in 2010 (i.e. first standards releases finalised by end of 2008);
  • To identify and analyse critical gaps in the relevant technical standards and support the standards development organisations in filling these gaps through dedicated technical contributions from the NGMN community;
  • To thoroughly evaluate the candidate technologies for NGMN against the NGMN requirements and provide guidance on the NGMN compliant technology.
  • To foster timely development and delivery of NGMN network infrastructure and end-user devices with global interoperability and excellent cost-performance ratios.

From July 2007 to February 2008, the following standards and technologies were evaluated within the TWG with respect to their suitability for next generation mobile networks: 

  • LTE/SAE, IEEE 802.16e & 802.20, UMB

“Based on the results of technology evaluation, the NGMN board concluded in June 2008 that LTE/SAE is the first technology which broadly meets NGMN recommendations. The NGMN Alliance therefore approves LTE/SAE as its first compliant technology”.


Organisation & Governance

Due to the wide range of different technical topics to be addressed within the NGMN Technical Work Programme, the TWG is organised via a series of dedicated Projects. Each of these Projects is initiated and approved by the NGMN Operating Committee and Board (see ABOUT US / ORGANISATION) and has defined objectives and deliverables that need to be produced to achieve the NGMN and TWG targets. These Projects involve technical experts from the NGMN Members, Sponsors, and Advisors which may adopt different participation roles, i.e. as a Project Lead, Contributor or Reviewer, see WORK PROGRAMME / OVERVIEW

 

The overall TWG project portfolio and the priorities, resources and progress in the individual TWG Projects are managed and supervised by a TWG Steering Committee with technical representatives from each NGMN Member organisation. The TWG Steering Committee guides the review process for all TWG deliverables within the NGMN Alliance and ensures overall quality and alignment for each deliverable. Final approval of the deliverables is granted by the Operating Committee and/or Board.

Currently the Technical WG comprises the following Projects (please follow the provided links to get more information on the objectives and deliverables for each Project):


Activities & Projects


SDOs and NGMN alignment (P-3GPP)

SDOs and NGMN alignment (P-3GPP)

The overall objective of this project is to ensure that 3GPP deliver SAE/LTE standards which meet (or exceed) the requirements set out in the NGMN White Paper and that 3GPP deliver these standards on a timescale that permits the NGMN’s timescales for commercial availability of service to be achieved.


Bandwidth Aggregation (P-BAG)

Bandwidth Aggregation (P-BAG)

Delivering user data rates and spectrum efficiencies promised by NGMN technologies requires bandwidths up to 20 MHz. As many operators do not have 20 MHz of contiguous spectrum, especially in bands below 2 GHz, bandwidth aggregation offers a technical solution to efficiently utilise existing spectrum. The objectives of P-BAG are:

  • To determine NGMN community's requirements for bandwidth aggregation
  • Conduct high level technical analysis to determine feasible bandwidth aggregation scenarios
  • Develop technical requirements specification for 3GPP for prioritised bandwidth aggregation scenarios


Database Convergence (P-DC)

Database Convergence (P-DC)

The objective of this project was to consolidate NGMN operator requirements, to evaluate benefits of user data centric approach, to evaluate cost reduction potential (CAPEX/OPEX), to define adaptation functions. This project has reached TG2 (Closure).


Initial Deployment Targets (P-IDT)

Initial Deployment Targets (P-IDT)

This project prioritised first/initial deployment targets for NGMN w.r.t.

  • Frequency bands and system bandwidths to be supported by initial HW
  • Multi-standard and multi band requirements for terminals and base stations
  • Inter-system mobility requirements

to guide the industry (vendors and partly SDOs) on their development work. This project has reached TG2 (Closure).


Initial Terminal Device Definition (P-ITDD)

Initial Terminal Device Definition (P-ITDD)

The objective of this project was to provide from an NGMN perspective the generic definition of what would comprise an initial release NGMN terminal/device considering a macro view of the marketplace needs on a global and/or regional basis balanced against the practical reality of terminal/device implementation for an initial market timeframe of 2010. This project has reached TG2 (Closure). See downloads for the deliverable of this project.


Multi-Vendor RAN (P-MVR)

Multi-Vendor RAN (P-MVR)

The objective of this project was to avoid partly open interfaces, to cover O&M Aspect, to ensure multi-vendor interoperability of LTE System, to ensure Multi vendor aspects are covered in 3GPP standards, and to clarify the testing philosophy of LTE products. This project has reached TG2 (Closure).


Open BBU RRH Interface (P-OBRI)

Open BBU RRH Interface (P-OBRI)

The objective of this project is to develop the implementation recommendations for open internal interface of radio base stations between BaseBandUnit (BBU) and the RadioRemoteHead (RRH).
By connecting with RRH via optical fibers, operators can reduce the cost of RF cabling.


Operational Efficiency (P-OPE)

Operational Efficiency (P-OPE)

The objective of this project is to further enhance the SON & O&M area with new use cases and optimize recommendations on functional and operational aspects. The project will also perform additional work and effective inputs into the standards with regards to Multi-vendor RAN to achieve true-multi vendor RAN for commercial deployment and to study all HeNB-Macro operational use cases.


Optimized Solutions for Backhaul and Meshed Networks (P-OSB)

Optimized Solutions for Backhaul and Meshed Networks (P-OSB)

This project aims to define requirements and to assess innovative ALL-IP transport solutions facilitating optimum backhauling (including self-backhauling).


System Architecture Harmonisation (P-SAH)

System Architecture Harmonisation (P-SAH)

This project defined the system architecture harmonization framework (stage 1-2) of all network elements including, e.g. converged mobility management for the TISPAN and NGMN environment:

  • Harmonised PCC/QoS for TISPAN and NGMN environment
  • Common IMS for TISPAN and NGMN
  • Harmonized VCC/MMSC for the TISPAN and NGMN environment
  • Converged mobility management for the TISPAN and NGMN environment.

This project has reached TG2 (Closure).


Support of Broadcast and Multicast (P-SBM)

Support of Broadcast and Multicast (P-SBM)

This project defined NGMN operators' requirements to provide broadcast and multicast services, together with unicast services, in a cost and spectral efficient way. Scope includes radio and core networks, spectrum, and different aspects of broadcast. This project has reached TG2 (Closure) and the deliverable can be found at Download Broadcast and Multicast – Recommendations & Requirements (P-SBM)


Security (P-SEC)

Security (P-SEC)

The objective of this project is to assure that the end-to-end security and security as described in the NGMN White Paper "Next Generation Mobile Networks Beyond HSPA & EVDO" are targeted and clarified, to give recommendations and co-operate with organisations addressing security to address the identified gaps.


Self-Organizing Networks and Self-Optimization (P-SON)

Self-Organizing Networks and Self-Optimization (P-SON)

The objective of this project was to increase the usage of self organizing functionality in LTE and define a common view on typical use cases with the target to simplify operability. These use cases were be the basis for deriving solution proposals and finally define requirements which represent a common NGMN point of view. With the help of this joint initiative suppliers shall be invited to deliver solutions to the SON requirements. This project has reached TG2 (Closure). See downloads for the deliverables of this project.


Terminal Certification (P-TCER)

Terminal Certification (P-TCER)

This project aims to recommend on necessary improvements in the current certification process (GCF, PTCRB, CCF etc..), to give guidance to the relevant standards bodies to timely deliver test cases and test environments, to liaise with other NGMN WG’s/projects to ensure that the prioritised feature set and test case requirements are made available as a matter of urgency and to follow-up on the prioritised improvement proposals identified in the GAP Analysis.


Terminal Aspects (P-TER)

Terminal Aspects (P-TER)

This project supported and promoted early device specifications and readiness through recommendations, inputs and complementary work where necessary and appropriate. This project has reached TG2 (Closure). See downloads for the deliverable of this project.


Gap Analysis and Standards Contributions (TF-GA)

Gap Analysis and Standards Contributions (TF-GA)

The TWG does perform on a reqular bases a comprehensive gap analysis on the level of coverage of each individual NGMN requirement and recommendation by the relevant technical standards. Requirement specifications and significant technical contributions have been provided to standards development organisations (SDOs) such as 3GPP, 3GPP2, IEEE and the WiMAX Forum, e.g. in the areas of system architecture, functionalities, performance, service capabilities, and interoperability. These contributions were submitted either via official liaison statements from the TWG or via individual input documents in the name of various NGMN Members.


Technology Evaluation (TF-TEVAL)

Technology Evaluation (TF-TEVAL)

In an extensive exercise, the TWG has performed a comprehensive technology evaluation of the NGMN candidate technologies

  • 3GPP Long Term Evolution (LTE/SAE);
  • 3GPP2 Ultra Mobile Broadband (UMB);
  • IEEE 802.16e/m (Mobile WiMAX).

Against the NGMN White Paper requirements and recommendations. This analysis covers the following four areas of evaluation criteria: Performance, Functionalities, Interworking, and Time-to-Market. The technology evaluation task was very actively supported by the NGMN Sponsors (vendors/manufacturers) who made valuable technical contributions w.r.t. radio performance results (simulations and measurements), performance optimization, as well as confidential information about their development roadmaps (for anonymous evaluation).

 

“Based on the results of technology evaluation, the NGMN board concluded in June 2008 that LTE/SAE is the first technology which broadly meets NGMN recommendations. The NGMN Alliance therefore approves LTE/SAE as its first compliant technology”.






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