Presentation by Hanwoong Lim at APRICOT 2019 on Tuesday, 26 February 2019.

1. IPv6 Deployment & Challenges in SKT 4G/5G
Hanwoong Lim
Core Engineering Team
Infra Engineering Group
SK Telecom

2. Contents
1

3. Contents
2

4. About SK Telecom
3
South Korea No.1 Mobile Network Operator (30M+ subscribers)
Expanding the new ICT Portfolio
MNO MEDIA IoT / DATA AI Platform
Launched in
Dec 01 2018

5. Reasons for IPv6 Migration
4

6. SKT IPv6 adoption before/after
5

7. SKT IPv6 now on
6
…
[National IPv6 usage by ASN1)] [Global ISPs rank having IPv6 users2)]
1) https://www.internetsociety.org/resources/2018/state-of-ipv6-deployment-2018/
2) https://www.apnic.net/community/ipv6/ipv6-in-your-region/?cc=KR

8. Contents
7

9. LTE Network & 464XLAT Architecture
• T-Mobile (US) • Sprint(US)
• Reliance Jio (IN) • Orange (PL)
• SK Telecom(KR) • Telstra(AU)
• Rogers(CA) • EE(UK).
Mobile Operators with 464XLAT
ENB
Backhole
PGWMME
NAT64
(SGI F/W)
Internet
EPS Default Bearer
UE
Attach
SGW
Create session
UE gets IPv6 address
LTE UE IP allocation process
DNS64
DNS64 query
6to4 translateCLAT
464XLAT Process

10. LTE Network & 464XLAT Architecture challenges
[Site A]
[Site B]
[Site C]

11. Contents
10

12. Mobile IPv6 service entity
IPv6
IPv4

13. IPv6 service entity - ① UE(User Equipment)
IPv6
IPv6

14. IPv6 service entity - ② Network(Backbone, LTE N/W, IX)
Internal
IPv6
IPv4 IPv6

15. Authentication Charging
NMS
Policy
&
Control
IMS Mgmt.
LTE EPS
Authentication • user auth. Additional plan
Charging • offline, online charging
Policy&Control • Plan based capacity control
Mgmt. • IPv6 address, IPv6 configuration
IMS • HD-Voice, RCS
NMS • Service statistics and report
IPv6 service entity – ③ Telco Systems
8 kinds of Multi-vendor LTE EPS have been developed

16. IPv6 service entity – ④ Internet services verification

17. Contents
16

18. Wired
(broadband)
Wireless
(LTE)
• IPv4 + IPv6 dual
stack
• Cannot solve IPv4
depletion problem
• IPv6 only
• IPv4 depletion
problem solved
Voice(IPv6) + Data(IPv4) Voice&Data(IPv6)
• IPv4 address request 1/2
reduced
• Not a fundamentally solved
• IPv6 only
• IPv4 depletion problem solved
OO-Mobile SK Telecom
• No coordination
with other player
• Representative
service only
• Customer oriented
& coordination
with other player
• All internet
service providing
with IPv6
SKT IPv6 Differentiation point

19. Conclusion

20. Q&A
Thank you
Contact – hanwoong.lim@sk.com