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Content for  TR 23.758  Word version:  17.0.0

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0  Introductionp. 8

Edge Computing is a network architecture concept that enables cloud computing capabilities and service environments to be deployed at the edge of the cellular network. It promises several benefits such as lower latency, higher bandwidth, reduced backhaul traffic and prospects for several new services. This technical report identifies the key issues and corresponding application architecture and related solutions with recommendations for the normative work.

1  Scopep. 9

The present document is a technical report capturing the study on application architecture for enabling edge applications over 3GPP networks. The aspects of the study include identifying architecture requirements (e.g. discovery of edge services, authentication of the clients), supporting application layer functional model and corresponding solutions to enable the deployment of applications on the edge of 3GPP networks, with no impact to edge-unaware applications on the UE and minimal impact to edge-aware applications on the UE.
The study takes into consideration the work done for edge computing in TS 23.501 and other related work outside 3GPP.
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2  Referencesp. 9

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.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.501: "System Architecture for the 5G System; Stage 2".
[3]
TS 23.503: "Policy and charging control framework for the 5G System (5GS); Stage 2".
[4]
TS 23.222: "Functional architecture and information flows to support Common API Framework for 3GPP Northbound APIs; Stage 2".
[5]
TS 29.122: "T8 reference point for northbound Application Programming Interfaces (APIs)".
[6]
TS 23.003: "Numbering, addressing and identification".
[7]
TS 23.502: "Procedure for the 5G System; Stage 2".
[8]
ETSI GS MEC 003 (V2.1.1): "Multi-access Edge Computing (MEC); Framework and Reference Architecture".
[9]
ETSI GS MEC 011 (V1.1.1): "Mobile Edge Computing (MEC); Mobile Edge Platform Application Enablement".
[10]
ETSI GS MEC 010-2 (V1.1.1): "Mobile Edge Computing (MEC); Mobile Edge Management; Part 2: Application lifecycle, rules and requirements management".
[11]
TS 29.522: "5G System; Network Exposure Function Northbound APIs; Stage 3".
[12]
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
[13]
ETSI GS MEC 010-2 V1.1.1, "Mobile Edge Computing (MEC); Mobile Edge Management; Part 2: Application lifecycle, rules and requirements management"
[14]
TS 23.288: "Architecture enhancements for 5G System (5GS) to support network data analytics services".
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3  Definitions, symbols and abbreviationsp. 10

3.1  Definitionsp. 10

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.
Application Client:
Application software resident in the UE performing the client function.
Application Server:
Application software resident in the cloud performing the server function.
Edge Application Server:
An Application Server resident in the Edge Hosting Environment.
Edge-aware Application:
An Edge Application Server or Application Client which is aware of Edge Data Network, and can leverage the Edge Computing capabilities.
Edge Computing:
A concept, as described in TS 23.501, that enables operator and 3rd party services to be hosted close to the UE's access point of attachment, to achieve an efficient service delivery through the reduced end-to-end latency and load on the transport network.
Edge Computing Service Provider:
A mobile network operator or a trusted 3rd party service provider offering Edge Computing service.
Edge Data Network:
Local Data Network that supports distributed deployment of Edge Hosting Environments.
Edge Enabler Client:
A functional entity resident in the UE providing services for the Application Clients.
Edge Enabler Server:
A functional entity resident in the Edge Hosting Environment providing services for the Edge Application Servers and Edge Enabler Clients
Edge Hosting Environment:
An environment providing support required for Edge Application Server's execution.
Local Data Network:
A data network access point geographically close to a UE's point of attachment.
For the purposes of the present document, the following terms and definitions given in TS 23.501 apply:
Local Area Data Network
Uplink Classifier
For the purposes of the present document, the following terms and definitions given in TS 23.503 apply:
Operating System (OS)
Operating System Identifier (OSId)
OS specific Application Identifier (OSAppId)
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3.2  Abbreviationsp. 10

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.
5GC
5G Core Network
5GS
5G System
AAF
Authentication/Authorization Function
ACR
Anonymous Customer Reference
AF
Application Function
AKA
Authentication and Key Agreement
AMF
Access and Mobility Management Function
API
Application Programming Interface
APN
Access Point Name
ASP
Application Service Provider
AUSF
Authentication Server Function
CAPIF
Common API Framework
CN
Core Network
DNAI
DN Access Identifier
DNN
Data Network Name
DNS
Domain Name System
E-UTRAN
Evolved Universal Terrestrial Access Network
EAS
Edge Application Server
ECSP
Edge Computing Service Provider
EDN
Edge Data Network
EDNCS
Edge Data Network Configuration Server
EEC
Edge Enabler Client
EES
Edge Enabler Server
EPC
Evolved Packet Core
ETSI
European Telecommunications Standard Institute
FQDN
Fully Qualified Domain Name
GPS
Global Positioning System
GPSI
Generic Public Subscription Identifier
ID
Identity
IP
Internet Protocol
ISG
Industry Specification Group
KPI
Key Performance Indicators
LADN
Local Area Data Network
LCM
Lifecycle Management
LCS
Location Services
MNO
Mobile Network Operator
NAT
Network Address Translation
NEF
Network Exposure Function
NF
Network Function
NWDAF
Network Data Analytics Function
OSS
Operations Support System
PCF
Policy Control Function
PDU
Protocol Data Unit
PDN
Packet Data Network
PLMN
Public Land Mobile Network
QoS
Quality of Service
SCEF
Service Capability Exposure Function
SDP
Session Description Protocol
SIM
Subscriber Identity Module
SLA
Service Level Agreement
S-NSSAI
Single Network Slice Selection Assistance Information
SSID
Service Set Identifier
TA
Tracking Area
TAI
Tracking Area Identity
UDM
Unified Data Management
UE
User Equipment
UPF
User Plane Function
URI
Uniform Resource Identifier
URSP
UE Route Selection Policy
V2X
Vehicle-to-everything
VIM
Virtualized Infrastructure Manager
VM
Virtual Machine
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