VoLTE video telephony – a communication evolution
 

Like this? Share it with your network

Share

VoLTE video telephony – a communication evolution

on

  • 1,838 views

Ericsson prospective on Video over LTE. Presented during IMTC 20th Anniversary Forum in Porto, Portugal

Ericsson prospective on Video over LTE. Presented during IMTC 20th Anniversary Forum in Porto, Portugal

Statistics

Views

Total Views
1,838
Views on SlideShare
1,836
Embed Views
2

Actions

Likes
1
Downloads
37
Comments
0

1 Embed 2

https://twitter.com 2

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

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
  • Com Evo and Flexible RCS Intro 2013-05-06 © Ericsson AB 2013

VoLTE video telephony – a communication evolution Presentation Transcript

  • 1. VoLTE video telephony – a communication evolution Per Synnergren Expert Mobile Broadband Services and Performance Ericsson AB 2013-10-08
  • 2. VoLTE video telephony is happening now! 1. VoLTE video telephony natural part of the communication evolution 2. Launched in commercial operation 3. More launched coming next 12 months 4. Quality level set correctly in launched networks 5. Radio environment in launched network close to ideal 6. Normal network environment will require additional media functionality – adaptation 7. Further work in the industry may be required to secure the video quality
  • 3. History of VoLTE video telephony (GSMA IR.94) Transformation into GSMA PRDs OneVoice Nov 2009 PRD IR.92 Voice UNI PRD IR.94 Video call additions Extensions of IR.92 Subset and e2e systemization MMTel Interoperability testing PRD IR.39 HDVC
  • 4. Communication Evolution RCS-e VoLTE RCS 5.x Consumer Communication HD Voice HD Video calling Multi-device and Multi- access BE VoIP BE Video CS voice HD Voice RCSe feature set Additional differentiators Alignment to RCS5 VoLTE RCS feature set Interoperable voice and SMS over LTE (IR.92) CS- coexistence Advanced services roaming Europe USA Japan Korea
  • 5. Market situation 1. >6 Million commercial VoLTE users (September 2013) • SKT 4.5M • LGU+ 1.5M • KT 200k 1. 3 networks in commercial operation 2. Major launches planned end- 2013/beginning 2014 3. Video part of launched networks, planned in many launches 4. ~40 commercial models launched
  • 6. Voices from korean customers “Very impressed with video-call quality” “The voice is definitely clear like I’m using a microphone on a computer” “Less background noise. Maybe couldn’t hear any noise at all” “Call connection ringtone sounds like a live music” “I can’t notice any difference time to time.” Speed of LTE in a crowded area is amazing “It’s obviously way better Crisp, clear video quality compared to 3G video call”
  • 7. Very dense network planning in Korea = Best possible networks to launch VoLTE/video telephony in!!!
  • 8. Quality of Experience is important: Secure video quality! 1. Video telephony over radio; a challenging application/access combination! 2. It requires; low latency, low error rates and high bit rates 0.1 1 3 15 Delay from capturing the video until it is viewed [seconds] Video Calling and Video Conferencing Video Clip Services TV Broadcast and Live Webcast Video Sharing <0.4s
  • 9. 1.5 2.0 2.5 3.0 3.5 4.0 4.5 225kbps 350kbps 500kbps 650kbps 800kbps 1000kbps 1500kbps 360p Upscale 25Hz 480p 25Hz Video bitrate for enjoyable quality MOS-VQS Video bitrate VGA video format, H.264 video codec Typical target to be above Typical target to be above
  • 10. What is used in deployed networks? • 480p (VGA) native video format used in deployed networks • Video bitrate >=500 kbps as recommended
  • 11. Quality aspects - Visible degradations • End-user service expectations – Varies between video services • Assumption of acceptable visible degradations: – Video Calling, Video Sharing and Video Conferencing • Once per 20 seconds – Live Web Cast • Once per 15 minutes – TV Broadcast/Video Clip • Once per 45-60 minutes (basically error free) PLR: 10-3 PLR: 10-5 PLR: 10-6
  • 12. Can it be achieved in field? Table: 99% percentile and average of PLR (high load, low SINR for one device) Table: 99% percentile and average of PLR (low load, high SINR for both devices) Table: 99% percentile and average of PLR (high load, high SINR for both devices)
  • 13. The challenge we should work further on is … … how to offer a Video Call in an real LTE network deployment planned for MBB and Voice? >500 kbps >? kbps x dB
  • 14. What happens in the “yellow area”? 10 15 20 25 30 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Process time [s] Delay [s] Packet delay Lost packet
  • 15. Situation improved by video bitrate adaption! 10 15 20 25 30 0 100 200 300 400 Bitrate [kbps] 10 15 20 25 30 0 0.1 0.2 0.3 0.4 Packet delay [s] Process time [s] 10 15 20 25 30 100 200 300 400 Bitrate [kbps] 10 15 20 25 30 0 0.5 1 1.5 2 Process time [s] Packet delay and lost packets Packet delay [s] Packet lost Congestion problem detected in advance to avoid packet loss and delay increase Abrupt reduction in video bitrate when congestion is identified in UE UE triggered adaptation Network triggered adaptation Possible to have mooth reduction in video bitrate, when congestion starts to build up
  • 16. Sender based adaptation RTP RTCP SR/RRBandwidth estimatorBandwidth estimator • Reacts on data in RR/SR, e.g. fractional loss • Estimates available bandwidth • If video rate > available bandwidth • Sends rate request to the controller • Reacts on data in RR/SR, e.g. fractional loss • Estimates available bandwidth • If video rate > available bandwidth • Sends rate request to the controller Mediasender Needs regular RTCP reports during normal operation Mediareceiver ControllerController EncoderEncoder
  • 17. Receiver based adaptation Rate controlRate control Arrival time model and channel usage detection Arrival time model and channel usage detection MediaReceiver Over-use Normal Under-use Over-use Normal Under-use Video frame Uses filterUses filter • Adjusts Receiver Bandwidth Estimation • Send rate requests • Adjusts Receiver Bandwidth Estimation • Send rate requests  Works on inter-frame arrival delay  Rate request send to the sender using RTCP TMMBR RTCP (TMMBR) RTP MediaSender ControllerController EncoderEncoder
  • 18. ECN trigger Rate controlRate control ECN and channel usage detection ECN and channel usage detection MediaReceiver With ECN RTCP (TMMBR) RTP
  • 19. • GSMA IR.94 does not mandate video adaptation functionality • 3GPP do specify the protocols needed, but not procedures/guidelines •  Video adaptation may need operator specific multivendor test and verification • Something for IMTC to consider? Interoperability not (fully) secured!
  • 20. VoLTE video telephony is happening now! 1. VoLTE video telephony natural part of the communication evolution 2. Launched in commercial operation 3. More launched coming next 12 months 4. Quality level set correctly in launched networks 5. Radio environment in launched network close to ideal 6. Normal network environment will require additional media functionality – adaptation 7. Further work in the industry may be required to secure the video quality