• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Improvement of VoLTE Domain HO with Operators Vision
 

Improvement of VoLTE Domain HO with Operators Vision

on

  • 13,183 views

NW Strategy Group, Global Standardization Team

NW Strategy Group, Global Standardization Team
Network Development Department
NTT DOCOMO R&D Center
KOSHIMIZU, Takashi
2012/03/06
WTC 2012 @ Miyazaki

Statistics

Views

Total Views
13,183
Views on SlideShare
1,314
Embed Views
11,869

Actions

Likes
1
Downloads
98
Comments
0

23 Embeds 11,869

http://blog.3g4g.co.uk 11621
http://lteworld.org 94
http://feedly.com 77
http://feeds.feedburner.com 26
http://wireless650.rssing.com 6
http://digg.com 5
http://www.feedspot.com 5
http://www.google.co.il 4
http://www.google.no 4
https://www.google.com 4
http://newsblur.com 4
http://translate.googleusercontent.com 3
http://ranksit.com 3
http://webcache.googleusercontent.com 3
http://www.ighome.com 2
http://www.google.co.kr 1
https://www.commafeed.com 1
http://www.inoreader.com 1
http://www.todayspecialoffers.com 1
http://www.hanrss.com 1
http://feedreader.com 1
http://feedproxy.google.com 1
https://reader.aol.com 1
More...

Accessibility

Categories

Upload Details

Uploaded via as Adobe PDF

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Improvement of VoLTE Domain HO with Operators Vision Improvement of VoLTE Domain HO with Operators Vision Presentation Transcript

    • TS-A3 (Technical Session): Mobile Access and Network - #4 Improvement of VoLTE Domain HO with Operators Vision NW Strategy Group, Global Standardization Team Network Development Department NTT DOCOMO R&D Center KOSHIMIZU, Takashi 2012/03/06 WTC 2012 @ Miyazaki NTT DOCOMO, INC., Copyright 2012, All rights reserved. 1
    • Motivation of the Work (eSRVCC) This slides primary explains an improvement scheme of SRVCC Domain HO (eSRVCC) 3G/UMTS Area Single Radio VCC (SRVCC) is an essential technology for Voice Domain HO (Between CS and EPC domain) EPC 3G CN LTE coverage LTE LTE Covered JAN 2012 3G/UMTS Area Covered APR 2012 Covered JUL 2012 NTT DOCOMO, INC., Copyright 2012, All rights reserved. 2
    • VoLTE (Voice Over LTE) Migration Scenario • • • LTE Data only => Voice with CSFB => VoLTE (eSRVCC) eSRVCC shall be mandatory applied in roaming & interworking scenario based on GSMA_IREG specification. UE can be normal SRVCC terminal, eSRVCC only upgrade the NW. CSFB since NOV 2011 LTE Data Since DEC 2010 While connected on LTE, a CSFB capable UE will switch from LTE to 3G Internet/ for voice PDN service upon incoming (or outgoing) call. Internet/ PDN EPC EUTRAN Data Today VoLTE & eSRVCC (2014) CS CN UTRAN Voice EPC Stand-by or Connected on LTE EUTRAN LTE LTE 3G IMS Incoming CS CN Call Voice Call UTRAN In 3G Data CS Fallback Switch LTE 3G For voice service Internet/ PDN Voice CS Fallback NTT DOCOMO, INC., Copyright 2012, All rights reserved. EPC CS CN EUTRAN UTRAN Data VoLTE Voice SRVCC 3
    • OTT VoIP and VoLTE OTT VoIP VoLTE Treated as A Data stream A Voice Grade Call QoS Class Non-GBR Best Effort data service: QCI = 7 High quality GBR: QCI=1 Conversational Voice NO YES NO Stand alone voice Service Orchestration Operator provides a set of service. Treated as a data stream (in LTE->3G HO, quality degradation may occur) Infrastructure supports the quality. (e.g., SRVCC/eSRVCC) Emergency Call Service Set Infrastructure support NTT DOCOMO, INC., Copyright 2012, All rights reserved. 4
    • The concept of AIPN and SEN Value Added Value Added Services Services Mobile Simultaneous Interpretation System Trusted-partner Internet-player Value-added enablers A service that automatically translates the language on the one party into the language on the other party during r a call in progress. WEB-enabler bl e na Communication Communication Services Services om lec Te -e Location Messaging photo Network Cloud Video Service Orchestration Voice Game etc. Connectivity Connectivity Services Services Maki’s mother (Japanese) She talks and listens in Japanese Interpretation etc. Session Coordination Japanese Japanese English ALL-IP Network English Translation NTT DOCOMO, INC., Copyright 2012, All rights reserved. Maki and her host family They talk and listen in English 5
    • VCC and NW Architecture in VoLTE IMS TAS TAS S-CSCF S-CSCF EPC Bearer Setup Req. for Voice PCRF PCRF S-CSCF S-CSCF P-CSCF P-CSCF P-CSCF P-CSCF Bearer for SIP (always-on) Call Req. (SIP) eNodeB eNodeB Originating UE S-GW S-GW P-GW P-GW Bearer for Voice media (established as required) NTT DOCOMO, INC., Copyright 2012, All rights reserved. P-GW P-GW Terminating UE 6
    • SRVCC Procedure Home NW Visited NW Voice media / SIP paths After Handover (Step 6) IMS SCC AS RNC/ NodeB Handover Detection UE1 MSC CS Resource Reservation Request (Step 2) HSS EPC MME SGW eNodeB Voice media path SIP signaling path CSCF Session Transfer Request (Step 3) PGW Handover Request (Step 5) Media path Transfer Request (Step 4) UE2 ▲ Anchor for Voice media Voice media / SIP paths Over LTE (Step 1) NTT DOCOMO, INC., Copyright 2012, All rights reserved. 7
    • SRVCC Drawback and the Improvement SRVCC eSRVCC U-Plane (Voice Media) Anchor point Locates at Home NW Locates at Visited NW (ATGW Anchors it) C-Plane Anchor point Also locate at Home IMS UE2 ATGW Anchor for Voice media Anchor for Voice media IMS SCC AS Because ATCF Have to travel to the Home NW, always. Visited NW only In principle, IMS controls in the Home NW, HO Signaling Path Locates at Visited NW (ATCF Intercepts it) eSRVCC improved the drawbacks NTT DOCOMO, INC., Copyright 2012, All rights reserved. 8
    • Enhanced SRVCC Visited NW Voice media / SIP paths After Handover (Step 6) RNC/ NodeB Handover Detection UE1 Session Transfer Request (Step 3) Home NW Media path Transfer Request (Step 4) MSC ATCF CS Resource Reservation Request (Step 2) eNodeB Voice media path SIP signaling path SCC AS CSCF ATGW ▲ Anchor for voice media MME SGW IMS PGW UE2 Voice media / SIP paths over LTE (Step 1) Handover Request (Step 5) NTT DOCOMO, INC., Copyright 2012, All rights reserved. 9
    • Performance Improvement SRVCC to eSRVCC Source E-UTRAN UE Target MSC MSC Server/ MGW Source MME Target SGSN Target BSS SGW IMS (SCC AS) 1. Measurement reports 2. Decision for HO 3. Handover Required 4. Bearer Splitting Delay Factor #1 Delay Factor #2 IMS Remote Leg Update & Session Transfer 5.PS to CS Req 6.Prep HO Req 7. HO Request/Ack 8.Prep HO Resp Radio Access Major Delay Factor Update 9. Establish circuit 10. Initiation of Session Transfer (STN-SR) 11. Session transfer and Update remote end 13.PS to CS Resp 14. Handover Command 1-2 hundreds of ms* 15. HO from EUTRAN command 12. Release of IMS access leg 16. UE tunes to UTRAN 17. HO Detection 18. Update Bearer Not a critical latency 19. HO Complete 20.SES (HO Complete) 21. ANSW ER 22. CS to PS Complete/Ack 23.UpdateLoc NTT DOCOMO, INC., HSS/ HLR Copyright In a roaming case, potential of 1/2 sec or more in SRVCC. eSRVCC reduced it to negligible one 2012, All rights reserved. 10
    • Conclusion & Way Forward This Presentation Explained • The needs of eSRVCC with DOCOMO’s NW Migration Plan – LTE radio coverage are limited, not full covered yet. • Infrastructure Sustain Voice Quality in Domain HO – SRVCC and eSRVCC • We provides various service set + the SEN-Platform – OTT VoIP (single service) v.s. Service Set • Mechanism of VoLTE and SRVCC – Basic Mechanism Explained • Improved Scheme of eSRVCC – ATGW/ATCF locates at Visited NW – And eSRVCC is mandatory used as in GSMA_IREG spec. NTT DOCOMO, INC., Copyright 2012, All rights reserved. 11
    • Thank you for listening New Smartphone series User-friendly & brings more fun to life Innovative & broadens your potential FY2011 winter-spring models Tablets NTT DOCOMO, INC., Copyright 2012, All rights reserved. 12