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Keywords & Acronyms

We have written articles to explain some 3GPP related keywords and acronyms, to give some background material on the topic.

Terms include:  

3GPP Series & technologies

The first two digits of a 3GPP TS or TR number define the spec series; for example LTE radio (E-UTRAN) is defined in the 36 Series.

On this page you can find which technology is [at least partially] aligned with which 3GPP series.

A-Z list of technical terms

The 3GPP Report ‘Vocabulary for 3GPP Specifications’ identifies specialist technical terms used;

  • To ensure that editors use terminology that is consistent across specifications.
  • To provide a reader with convenient reference for technical terms that are used across multiple documents.

Furthermore, you can check which Spec(s) a term or abbreviation is defined in using ETSI’s TEDDI application. Note that this only shows terms defined in 3GPP TSs and TRs which have already been transposed as ETSI publications.


NR / LTE Dynamic spectrum sharing (DSS)

October 14, 2020

Dynamic spectrum sharing (DSS) provides a very useful migration path from LTE to NR by allowing LTE and NR to share the same carrier. DSS was included already in Rel-15 and further enhanced in Rel-16.

As the number of NR devices in a network increases, it is important that sufficient scheduling capacity for NR UEs on the shared carriers is ensured.

Source: Tdoc RP-193260 from TSG RAN#86, December 2019 (Approved)

Unmanned Aerial Systems over 5G

November 18, 2019

To address the needs of a new and quickly maturing sector, there has been a lot of activity in the 3GPP Working Groups to ensure that the 5G system will meet the connectivity needs of Unmanned Aerial Systems (UAS) – consisting of Unmanned Aerial Vehicles (aka. drones) and UAV controllers under the watchful eye of UAS traffic management.

As 5G use cases have evolved, new studies and new features are needed, for the safe operation of UAVs, but also to ensure that other users of the network do not experience a loss of service due to their proximity to Unmanned Aerial Systems.

Gigabit LTE

June 2, 2017

Although we (3GPP) didn't coin the term 'Gigabit LTE', it is a milestone that is based on
LTE-Advanced and LTE-Pro features and one that is being heralded as an important step towards 5G type services.

By using LTE to provide more bandwidth to customers, there is an inherant step-up towards 5G ready networks.

Gigabit LTE is happening in 2017, features include (source Mobile Europe);

  • Tri-carrier aggregation
  • 256QAM and
  • 4x4 MIMO
  • Cloud RAN
  • Licence Assisted Access technology


SC-PTM, an agile broadcast/multicast mechanism

January 28, 2016

By Jeff Gao, Rapporteur for 3GPP Support of single-cell point-to-multipoint transmission in LTE.

Broadcast/Multicast services have been earmarked as a potential area of growth in the future. Single Cell Point To Multiploint (SC-PTM) uses the eMBMS system architecture, providing enhancements in the air interface to improve radio efficiency and to reduce latency. SC-PTM supports broadcast/multicast services over single cell, and the broadcast/multicast area can be dynamically adjusted cell by cell according to user’s distribution.

SC-PTM transfers the broadcast/multicast services using LTE downlink shared channel (i.e. PDSCH), and it is scheduled using a common RNTI (i.e. Group-RNTI) for a group of users. The SC-PTM scheduling is quite agile and radio resources could be dynamically assigned in time and frequency domain by PDCCH based on real time traffic load TTI by TTI.

3GPP Core Rx Interface Evolution

Policy and Charging Control Access for Internet Application Developers

By Xia Haitao and Horst Brinkmann, 3GPP CT3

Policy and charging management allows operators to define the rules for Quality of Service (QoS), network usage and charging control. In the All-IP era it is assumed that web application developers will now work on telecom services in the same way they have been working on computer based services until now. For this purpose, the 3GPP Policy and Charging Control (PCC) system is acting as an entry point for end-to-end service control - based on PCC functionality.

The 3GPP way to fulfil this new demand is to adapt the Diameter based Rx interface to be incorporated in standards and protocols used by Internet application developers. The evolution of the Rx interface will enable them to smoothly access the 3GPP PCC architecture and to use the PCC functionality for the creation of value-added services. The upshot of this is a better business model for the operator, providing the right QoS and charging possibilities for mobile applications.

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