1. Mobile Edge Computing (MEC) in 5G network
Presenter: Ching-Chun Chou
Advisor: Hung-Yu Wei
2018/12/03

2. Outline Mobile Edge Computing (MEC) Wireless communication MEC in 5G
Definition & elements
MEC platforms
Wireless communication
Generation of wireless communication standard
Towards 5G
Between MEC and 5G
MEC in 5G
ETSI specification: framework and scenarios

3. Mobile edge computing

4. What is MEC? Mobile Computing + Edge Computing Mobile computing
Computing to be transported during usage
Mobile communication + hardware + software
Especially mobile devices
Edge computing
Computing to be hosted close to the UE’s access

5. Edge Computing
Service to be hosted close to the UE’s access point of attachment
Achieve an efficient service delivery
Reduced end-to-end latency and load on the transport network
Centralized Cloud Model
Edge-centric computing
Pedro Garcia Lopez, et al., “Edge-centric Computing: Vision and Challenges,” SIGCOMM Computer Communication. Rev. 45, 5, 37-42, September 2015

6. Open EDGE Computing Jointly initiated by
Intel, Nokia, Deutsche Telecom, Vodafone, NTT, Carnegie Mellon Univ., Crown Castle

7. Vodafone’s Demo on MWC 2018 Improving video streaming user experience
Time to start/number of stall/waiting time
Saguna edge computing platform

9. Multi-Access Edge Computing from Nokia
Real-time
Interactive
Secure
Analytical
Distributed

10. Nokia Edge Cloud
Scalable data center for work balance between cloud and edge computing

11. Edge Computing Platform from NTT
Locating edge servers in the vicinity of users/devices
Passing some of the load of the center servers and/or user devices

12. IoT Edge Computing Massive distributed computing system

13. Elements in Edge Computing
To be performed in the edge
Proximity
Physical and logical
Intelligence
Autonomous decision making
Trust
Personal and social sensitive data
Control
Management and coordination
Humans
Human-centered design for applications
Pedro Garcia Lopez, et al., “Edge-centric Computing: Vision and Challenges,” SIGCOMM Computer Communication. Rev. 45, 5, 37-42, September 2015

14. Wireless communication
With 5G Networks
Wireless communication

15. IMT-2020 Specified by ITU-R
International Telecommunication Union
Radiocommunication Sector
The requirement for the next generation mobile communication
Enhanced Mobile Broadband (eMBB)
Ultra-Reliable and Low Latency Communication (URLLC)
Massive Machine Type Communication (mMTC)
ITU-R M.1645

16. IMT-2020 Vision
5G usage scenarios
ITU-R M.1645

17. 5G Capability
IMT-Advanced (4G) VS. IMT-2020 (5G)
ITU-R M.1645

18. What is Proposed? Let’s take 4G for example
IMT-Advanced: the so-called 4G
WiMAX standard
Developed by the WiMAX forum
Technology specification from IEEE series
LTE standard
Developed by the 3GPP
Technology specification from the 3GPP Releases
5G is the 3GPP Release-15 & Release-16

19. 3rd Generation Partnership Project
The 3GPP is composed of 7 organizations
ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC
With market presenters

20. 3GPP Standard Releases
Note that 3G is IMT-2000

21. From the LTE System to 5G 5G is forward compatibility
Connectivity between
5G and LTE

22. 3GPP Timeline for 5G By the end of 2019 To be submitted to ITU-R 2017
2018
2019
2020 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
Rel-15 NSA (option-3) freeze
Rel-15 NSA (option-3) ASN.1
Rel-15 SA (option-2) freeze
Rel-15 SA (option-2) ASN.1
Rel-15 late drop freeze
Rel-15 late drop ASN.1
Rel-16 SI
Rel-16 SI/WI phase
Rel-16 freeze
Rel-16 ASN.1

23. Service and Requirements
Everything connection
More applications
Service extension
Capability extended

24. Between MEC and 5G Mobile communication + Edge Computing
Can the requirement of MEC be handled by 5G?
Let’s look at AR & VR
VR/AR average 5.6Mbps
7.1% of global communication above 25Mbps
Mushroom networks, “Bandwidth requiremnet for VR and AR, infographic 2017”

25. VR and AR Requirement
Qualcomm whitepaper, “VR and AR pushing connectivity limits,” October 2018

26. The framework and usage scenarios
MEC in 5G

27. ETSI ISG – Mobile Edge Computing
Initiated in Oct. 2014
Huawei, IBM, Intel, Nokia, NTT DoCoMo, Vodafone
Defining
Use cases
Deployment scenarios
Infrastructure
APIs in June, 2017
Whitepaper in June, 2018

28. 3GPP Key Enablers for Edge Computing
Local routing and traffic steering
A PDU session may have multiple N6 interfaces
Application function to influence UPF (re)selection
By Policy Control Function
Indirectly by Network Exposure Function
Session and Service Continuity (SSC)
Mobile scenarios
Support of Local Area Data Network
Serving PLMN providing services to UEs by Tracking Area
3GPP TS v15, 2018/03

29. 5G Architecture and MEC Service based architecture (SBA)
Interaction between the network function of 5G core networks and MEC entities

30. MEC Deployment Scenario
LTE eNB
RNC
Radio Network Controller
Multi-technology
Cell aggregation
Indoor/outdoor
Local delivery

31. Physical Deployment Examples of MEC
Physical computing resource may be chosen by the network operator
Site facilities, supported applications and their requirements, measured/estimated user load
Other technical or business factors

32. MEC Use Cases Active device location tracking
Augmented reality content delivery
Video analytics
RAN-aware content optimization
Distributed content and DNS caching
Application-aware performance optimization
Mobile-Edge Computing – Introductory Technical White Paper,

33. Use Case 1: Active Device Location Tracking
Enable real-time, network measurement based tracking of active terminal equipment
Mobile advertising, Smart City, campus management, etc.

34. Use Case 2: Augmented Reality Content Delivery
Minimize round-trip time and maximize throughput for quality of experience
Consumer propositions, local object tracking, local AR content caching

35. Use Case 3: Video Analytics
Process the video data to detect/notify specific configured events
Safety, public security, smart cities
Video data → low-bandwidth metadata

36. Use Case 4: RAN-aware Content Optimization
Improving QoE
Dynamic configuration
Enable new service and revenue opportunities
Promoted content delivery and subscriber throughput boosting

37. Use Case 5: Distributed Content and DNS Caching
Central cache and local cache
Reduce backhaul transport
Improve QoE
Content caching: up to 35%
DNS caching: 20%

38. Use Case 6: Application-aware Performance Optimization
Increase browsing throughput and reduce video stalling
Latency may also be reduced
Provide independent metrics on application performance
Video stalls, browsing throughput, latency, etc.

39. MEC Application Mobility
Detection of UE mobility
MEC subscribes to event notification through NEF
May also include RNIS
Validation o of application mobility
User context transfer and/or application instance relocation
Post-processing of application relocation

40. MEC Server Architecture
Hosting
Managing VM
IaaS
PaaS

41. Scope of ISG MEC Platform services and APIs Virtual Machine (VM) SLA
Communication Service
Service registry
RNIS
TOF
Virtual Machine (VM) SLA
Description and negotiation
Supervision and trouble shooting
MEC application platform and management interface

42. MEC Application Platform Service
Infrastructure service
Communication service
Service registry
Radio Network Information Service (RNIS)
Traffic Offload Function (TOF)

43. Infrastructure Service
Service-Oriented-Architecture (SOA)
Communication service
Application on a MEC server communicate with application platform service and each other
Through service-specific APIs
Service registry
Visibility of service on the MEC server
Authentication and authorization control

44. Radio Network Information Service (RNIS)
Provide authorized applications with low-level radio and network information
Deliver information from the radio network relating to users and cells
Provide indications relating to the activation of UE
Parameters of UE context and E-RAB
Indicate modification
Measurement and statistics information

45. Traffic Offload Function (TOF)
Prioritize traffic
Route selected, policy-based, user-data stream
To and from applications that are authorized to receive the data.
Application is supplied using
Pass through mode
End-point mode
Set filters at the E-RAB and packet level
E-RAB: SPID, QCI, ARP
Packet: (UE IP, Network IP, IP protocol)

46. 3GPP Standardization StatusTS
System Architecture for the 5G System TS
Procedures for the 5G System
Select a UPF close to the UE and executes the traffic steering from the UPF to the local network
Via N6 interface
Based on UE’s subscription data, location, info from AF

47. Functionality Supporting for Edge Computing
User plane (re)selection
(re)selects UPF to route the user traffic to the local Data Network
Local Routing and Traffic Steering
selects the traffic to be routed to the applications in the local Data Network
Session and service continuity
enable UE and application mobility
Application Function
influence UPF (re)selection and traffic routing via PCF or NEF
Network capability exposure
provide information to each other via NEF
QoS and Charging
PCF provides rules for QoS Control and Charging for the traffic routed to the local Data Network
Support of Local Area Data Network
support to connect to the LADN in a certain area where the applications are deployed

48. User Plane (re)Selection
Performed by the SMF by considering UPF deployment scenario
Centralized/distributed UPF close to/at the access network
Enable different capability
Home routed roaming

49. Local Routing and Traffic Steering
Traffic offloading
PDU sessions simultaneously correspond to multiple N6 interface
SMF control the data path

50. Session and Service Continuity
Multi-homed PDU sessions
A PDU session associated with multiple IPv6 prefixes
Branching Point provides forwarding

51. Application Function Influence on traffic routing
For non-roaming and to LBO deployments
Third-party application which the VPLMN has an agreement
AF may send request to influence SMF routing decisions for traffic of a PDU session
Allow routing user traffic to a local access to a data network
May use NEF to interact with the core

52. Network capability exposure
AMF service operations information flow
UDM service operations information flow
NEF service operations information flow

53. Support of Local Area Data Network
LADN service area is a set of Tracking Areas
Access to a DN via PDU session in LADN
AMF provides to the UE the LADN information
AMF tracks and informs SMF

54. MEC in Local DN Capability exposure MEC orchestrator as a 5G AF
Interact with NEF and relevant NF
Monitoring, provisioning, policy and charging
MEC host at the edge of 5G RAN
Need the RAN information

55. Conclusion Edge computing development status
ETSI ISG MEC
3GPP standardization activities
Potential applications and use cases for MEC

56. Q & A
Thanks for your listening