The need to support different kinds of UEs (e.g. for the Internet of Things (IoT)), services, and technologies is driving the technology revolution to a high-performance and highly efficient 3GPP system. The drivers include IoT, Virtual Reality (VR), industrial control, ubiquitous on-demand coverage, as well as the opportunity to meet customized market needs. These drivers require enhancements to the devices, services, and technologies well established by 3GPP. The key objective with the 5G system is to be able to support new deployment scenarios to address diverse market segments.
This document compiles requirements that define a 5G system.
The 5G system is characterised, for example, by:
Support for multiple access technologies
Scalable and customizable network
Advanced Key Performance Indicators (KPIs) (e.g. availability, latency, reliability, user experienced data rates, area traffic capacity)
Flexibility and programmability (e.g. network slicing, diverse mobility management, Network Function Virtualization)
Resource efficiency (both user plane and control plane)
Seamless mobility in densely populated and heterogeneous environment
Support for real time and non-real time multimedia services and applications with advanced Quality of Experience (QoE)
The present document describes the service and operational requirements for a 5G system, including a UE, NG-RAN, and 5G Core network. Requirements for a 5G E-UTRA-NR Dual Connectivity in E-UTRAN connected to EPC are found in TS 22.278.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
Soriano, R., Alberto, M., Collazo, J., Gonzales, I., Kupzo, F., Moreno, L., & Lorenzo, J. OpenNode: Open Architecture for Secondary Nodes of the Electricity Smartgrid. In Proceedings CIRED 2011 21st International Conference on Electricity Distribution, CD1. June 2011.
McTaggart, Craig, et al. "Improvements in power system integrity protection schemes": Developments in Power System Protection (DPSP 2010). Managing the Change, 10th IET International Conference on. IET, 2010.
Altinsoy, M. E., Blauert, J., & Treier, C., "Inter-Modal Effects of Non-Simultaneous Stimulus Presentation," A. Alippi (Ed.), Proceedings of the 7th International Congress on Acoustics, Rome, Italy, 2001.
For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
5G enhanced positioning area:
a subset of the 5G positioning service area that is assumed to be provided with additional infrastructure or deploy a particular set of positioning technologies to enhance positioning services.
5G LAN-type service:
a service over the 5G system offering private communication using IP and/or non-, i.e. UEs that are members of the same 5G LAN-VN IP type communications.
5G LAN-virtual network:
a virtual network capable of supporting 5G LAN-type service.
5G satellite access network:
5G access network using at least one satellite.
5G positioning service area:
a service area where positioning services would solely rely on infrastructures and positioning technologies that can be assumed to be present anywhere where 5G is present (e.g. a country-wide operator-supplied 5G network, GNSS, position/motion sensors).
a UE is in active communication when it has one or more connections established. A UE may have any combination of PS connections (e.g. PDP contexts, active PDN connections).
percentage value of the amount of simultaneous active UEs to the total number of UEs where active means the UEs are exchanging data with the network.
QoS requirement(s) that apply to the traffic of a group of UEs.
area traffic capacity:
total traffic throughput served per geographic area.
a user or other entity authorised to partially configure and manage a network node in a CPN (e.g. a PRAS, or eRG) or a PIN element in a PIN.
quantity of equivalent carbon dioxide emitted (e.g. kg of CO2 equivalent).
quantity of CO2 equivalent emission per unit of final energy consumption for an operational period of use. 
communication service availability:
percentage value of the amount of time the end-to-end communication service is delivered according to a specified QoS, divided by the amount of time the system is expected to deliver the end-to-end service.
Customer Premises Network:
a network located within a premise (e.g. a residence, office or shop), which is owned, installed and/or (at least partially) configured by the customer of a public network operator.
direct device connection:
the connection between two UEs without any network entity in the middle.
direct network connection:
one mode of network connection, where there is no relay UE between a UE and the 5G network.
This is the condition that a government decides when to initiate and terminate, e.g. a natural disaster. When this condition applies, users may have the opportunity to mitigate service interruptions and failures.
Disaster Inbound Roamer:
A user that (a) cannot get service from the PLMN it would normally be served by, due to failure of service during a Disaster Condition, and (b) is able to register with other PLMNs.
This is the special roaming policy that applies during a Disaster Condition.
the time that it takes to transfer a given piece of information from a source to a destination, measured at the communication interface, from the moment it is transmitted by the source to the moment it is successfully received at the destination.
energy charging rate:
a means of determining the energy consumption consequence (use of energy credit) associated with charging events.
a quantity of energy credit associated with the subscriber that can be used for credit control by the 5G system.
evolved Residential Gateway:
a gateway between the public operator network (fixed/mobile/cable) and a customer premises network.
A clock A, previously synchronized/syntonized to another clock B (normally a primary reference or a Master Clock) but whose frequency is determined in part using data acquired while it was synchronized/syntonized to B, is said to be in holdover or in the holdover mode as long as it is within its accuracy requirements.
the time period that is available to repair the first priority timing source when it is lost (e.g., when the primary GNSS reference is lost). During this period the synchronization accuracy requirement should be guaranteed, e.g., by means of defining multiple synchronization references.
a service containing the operator's own application(s) and/or trusted third-party application(s) in the Service Hosting Environment, which can be accessed by the user.
Hosting NG-RAN Operator:
the operator that has operational control of a Shared NG-RAN.
A configured and managed group of at least one UE PIN Element and one or more PIN Element that communicate with each other.
UE or non-3GPP device that can communicate within a PIN.
PIN direct connection:
the connection between two PIN Elements without any 3GPP RAN or core network entity in the middle.
PIN Element with Gateway Capability:
a UE PIN Element that has the ability to provide connectivity to and from the 5G network for other PIN Elements.
PIN Element with Management Capability:
A PIN Element with capability to manage the PIN.
positioning service availability:
percentage value of the amount of time the positioning service is delivering the required position-related data within the performance requirements, divided by the amount of time the system is expected to deliver the positioning service according to the specification in the targeted service area.
proximity-based work task offloading:
a relay UE receives data from a remote UE via direct device connection and performs calculation of a work task for the remote UE. The calculation result can be further sent to network server.
positioning service latency:
time elapsed between the event that triggers the determination of the position-related data and the availability of the position-related data at the system interface.
Premises Radio Access Station:
a base station installed at a customer premises network.
a service that requires priority treatment based on regional/national or operator policies.
a communication between two or more UEs belonging to a restricted set of UEs.
an isolated network deployment that does not interact with a public network.
ProSe UE-to-UE Relay:
a Public Safety ProSe-enabled UE that acts as a relay between two other Public Safety ProSe-enabled UEs.
refers to the determination of the distance between two UEs and/or the direction of one UE from the other one via direct device connection.
a dedicated network slice deployment for the sole use by a specific third-party.
relative positioning is to estimate position relatively to other network elements or relatively to other UEs.
in the context of network layer packet transmissions, percentage value of the packets successfully delivered to a given system entity within the time constraint required by the targeted service out of all the packets transmitted.
energy from renewable sources as energy from renewable non-fossil sources, namely wind, solar, aerothermal, geothermal, hydrothermal and ocean energy, hydropower, biomass, landfill gas, sewage treatment plant gas and biogases
a space-borne vehicle embarking a bent pipe payload or a regenerative payload telecommunication transmitter, placed into Low-Earth Orbit (LEO) typically at an altitude between 300 km to 2 000 km, Medium-Earth Orbit (MEO) typically at an altitude between 8 000 to 20 000 k m, or Geostationary satellite Earth Orbit (GEO) at 35 786 km altitude.
direct connectivity between the UE and the satellite.
a NG-RAN which uses NR in providing satellite access to UEs.
geographic region where a 3GPP communication service is accessible.
the uninterrupted user experience of a service that is using an active communication when a UE undergoes an access change without, as far as possible, the user noticing the change.
Service Hosting Environment:
the environment, located inside of 5G network and fully controlled by the operator, where Hosted Services are offered from.
a satellite providing the satellite access to an UE. In the case of NGSO, the serving satellite is always changing due to the nature of the satellite constellation.
S&F (Store and Forward) Satellite operation is an operation mode of a 5G system with satellite-access where the 5G system can provide some level of service (in storing and forwarding the data) when satellite connectivity is intermittently/temporarily unavailable, e.g. to provide communication service for UEs under satellite coverage without a simultaneous active feeder link connection to the ground segment.
S&F data retention period:
it is the data storage validity period for a 5G system with satellite access supporting store and forward operation (e.g. after which undelivered data stored is being discarded).
A synchronization threshold can be defined as the maximum tolerable temporal separation of the onset of two stimuli, one of which is presented to one sense and the other to another sense, such that the accompanying sensory objects are perceived as being synchronous.
the time that an application consuming a communication service may continue without an anticipated message.
Time to First Fix (TTFF):
time elapsed between the event triggering for the first time the determination of the position-related data and the availability of the position-related data at the positioning system interface.
for a 5G system with satellite access, it refers to the communication between UEs under the coverage of one or more serving satellites, using satellite access without the user traffic going through the ground segment.
An equipment that allows a user access to network services via 3GPP and/or non-3GPP accesses.
user experienced data rate:
the minimum data rate required to achieve a sufficient quality experience, with the exception of scenario for broadcast like services where the given value is the maximum that is needed.
a link which provides an interconnection between 5G network nodes and/or transport network using 5G radio access technology.
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
5G LAN-Virtual Network
Customer Premises Network
Enhancement to Flexible Mobile Service Steering
Evolved Residential Gateway
Flexible Mobile Service Steering
Geostationary satellite Earth Orbit
Internet Content Provider
Inertial Measurement Unit
Isolated E-UTRAN Operation for Public Safety
Metropolitan Beacon System
Mission Critical Services
Mission Critical X, with X = PTT or X = Video or X = Data