Ensuring VoLTE conformance and user experience


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LTE deployment is experiencing a significant boom. It is expected that in addition to data services, operators will deliver Voice, Video, and SMS services, as well as advanced services, over their LTE networks. For this, IMS network architecture will be used, specifically, the VoLTE specifications. It is a challenge to ensure that the overall user experience will live up to expectations. RADVISION experts will discuss what is needed to understand the latest VoLTE requirements from handset to the core network side. VoLTE testing methodologies including end user experience measurement of voice and Video will be discussed. LTE test scenarios will also be covered, as an important step in order to ensure interoperability according to the mobile phone standard 3GPP. In addition, the webinar will also focus on minimizing testing time and how to make sure that your LTE device is ready for wide scale deployment.

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Ensuring VoLTE conformance and user experience

  1. 1. Ensuring VoLTE Conformance and User Experience<br />July 28th, 2011<br />Sagi Subocki<br />Director of Product Management<br />Head of IMS Segment<br />RADVISION<br />sagis@radvision.com<br />Eli Cohen <br />Director, Product Management<br />Head of Testing Segment<br />RADVISION <br />elic@radvision.com<br />
  2. 2. Agenda<br />LTE and its impact on telecommunications<br />VoLTE<br />Ensuring Quality of Experience over VoLTE<br />VoLTE testing challenges<br />RADVISION’s solutions<br />
  3. 3. LTE and its Impact on Telecommunications<br />
  4. 4. LTE is a new All-IP, mobile access technology that enables much higher bandwidth with low latency for mobile networks<br />
  5. 5. LTE - The Future of Telecommunications<br />132 operators in 56 countries are currently investing in LTE for next-generation networks<br />Juniper research (11/2010): <br />Operators will make $100 billion off LTE by 2014<br />Maravedis research (5/2010):<br />Top 25 LTE operators will reach over 200 million LTE subscribers by 2015 <br />CAPEX spending to reach $14 billion in 2015<br />
  6. 6. Operators’ challenge: <br />3rd-party service providers will <br />provide good Voice and Messaging <br />over their LTE network<br />
  7. 7. Operators’ Strengths in the LTE Era <br /><ul><li> Best-quality service
  8. 8. Service continuity
  9. 9. Roaming capabilities
  10. 10. Leveraging their full control of the network</li></li></ul><li>IMS – The Future of NGN<br />But it will take some time to mature…<br />
  11. 11. VoLTE<br />
  12. 12. VoLTE - Voice over LTE<br />A subset of the IMS standard that covers only basic services and is ready to be deployed NOW.<br />
  13. 13. VoLTE - Voice over LTE<br />IMS profile<br />Starts as “One Voice”<br />Initiative of 18 operators and Handset vendors<br />GSMA adopts it<br />Work continues on the initial “One Voice” draft<br />Renamed to “VoLTE”<br />
  14. 14. VoLTE<br />Operators supporting VoLTE:<br />3 Group<br />AT&T<br />Bell Canada<br />China Mobile<br />Deutsche Telekom/T-Mobile<br />KDDI<br />Mobilkom Austria<br />MTS<br />NTT DoCoMo<br />Orange<br />SKT<br />SoftBank<br />Telecom Italia<br />Telecom New Zealand<br />Telefónica<br />Telenor<br />TeliaSonera<br />Verizon Wireless<br />Vodafone<br />
  15. 15. VoLTE<br />Handset manufacturers and equipment vendors supporting VoLTE:<br />Acme Packet<br />Alcatel-Lucent<br />Aylus, Camiant<br />Cisco<br />Colibra<br />Communigate<br />Comneon<br />Ericsson<br />Fujitsu<br />Genband<br />Huawei<br />LG<br />Motorola<br />Movial<br />Mu<br />NEC<br />Nokia<br />Nokia Siemens Networks<br />Qualcomm<br />RADVISION<br />Samsung<br />Sony Ericsson<br />Tekelec<br />
  16. 16. Audience Poll<br />When do you think the major operators will launch VoLTE services over their LTE Networks?<br /><ul><li>With the launch of their LTE Network
  17. 17. 1 year after the launch of their LTE Network
  18. 18. 2 years after the launch of their LTE Network
  19. 19. The LTE Network will never run VoLTE services </li></li></ul><li>Ensuring Quality of Experience over VoLTE<br />
  20. 20. Key to VoLTE Success<br />Compliancy to the standards:<br />Ensures interoperability<br />End-user experience <br />Easy deployment<br />“Worry-free” roaming<br />Smooth evolution to IMS<br />Ability to add new IMS services<br />
  21. 21. Factors that Affect End-User Experience <br />IOT<br />QoS<br />Video <br />Quality <br />Audio Quality<br />Standard<br />
  22. 22. VoLTE IOT - IMTC<br />Market leaders work to create interoperable, standard-based products in a non-profit organization<br />Development of testing plans and conducting IOT<br />IMTC IMS Activity Group:<br />Selected by “One Voice” initiative to develop VoLTE testing specification<br />Focuses on interoperability of IMS devices and technologies<br />Developing a VoLTE testing plan<br />Group members include Alcatel-Lucent, AT&T, Ericson, France Telecom, Nokia, NSN, RADVISION, Samsung, Sony-Ericson, ST-Ericson<br />
  23. 23. PLAN and STATUS 2011<br />Enhanced testing documentation<br />Finalize test cases according to plan<br />VoLTE testing at IMTC SuperOp!, May 16-20, 2011 in Hawaii<br />Additional IOT events in 2011<br />
  24. 24. Audio & Video Quality Measurement<br />Can Audio & Video Quality be measured?<br />Manually or automatically <br />If so, how do we measure it?<br />Online or offline? <br />Additional parameters to take into consideration:<br />Network<br />Codec <br />Content type<br />
  25. 25. MOS <br />MeanOpinion Score (MOS):<br />The arithmetic mean of all individual observations, ranging from 1 to 5.<br />MOS Quality Impairment: 5: Excellent 4: Good 3: Fair 2: Poor 1: Bad<br />Good<br />Fair<br />Poor<br />Bad<br />
  26. 26. Media Quality Measurement Methodologies<br />“Full Reference”<br />“No Reference”<br />
  27. 27. Voice Quality<br />VoiceQuality - No Reference <br />Based on a subjective opinion scale from 1-5 according to ITU-T G.107 <br />Analyzes the Voice Quality using different voice codecs in real-time<br />Voice Quality – Full Reference <br />PESQ: Perceptual Evaluation of Speech Quality using MOS scoring (Listening Quality), conforming to ITU-T P.862<br />Compares two-wave format (online and offline) <br />
  28. 28. Video Quality, Full Reference <br />Full-Reference allows you to perform a Video Quality analysis and compare the degraded video sequence to the original one while synchronizing the original and degraded streams: <br />VMOS by frame <br />Lip-Synchronization <br />Cause Analysis <br />Partial Image Analysis <br />Video KPI (Blockiness, Blurriness, PSNR, …..) <br />“Full Reference”<br />
  29. 29. Audience Poll<br />When do you think the major mobile providers will provide Video over the LTE Network? <br /><ul><li>With the launch of their LTE Network
  30. 30. 1 year after the launch of their LTE Network
  31. 31. 2 years after the launch of their LTE Network
  32. 32. The LTE Network will never be used for Video </li></li></ul><li>Video Quality, No-Reference <br />Global Video Quality estimation, based on network and codec parameters that are unprecedented in scope to guarantee the highest correlation with Video Quality test results measured by individual perception.<br />Takes into consideration:<br />Network parameters (PL, Jitter, …) <br />Codec (Fps, I-Frame, P-Frame) <br />Content type (motion, …) <br />Human perception <br />“No Reference”<br />
  33. 33. INTEROPERABILITY<br />STANDARDIZATION<br />Standardization & Interoperability<br />SIMPLet<br />
  34. 34. IMS Compliancy Challenges<br />Many new network entities<br />Many new protocol requirements<br />New interfaces<br />Different access networks, each behaving differently: Cellular, Wireless, Fixed Line, Cable, LTE, WiMAX<br />New standards constantly added upon and revised<br />
  35. 35. IMS VoLTE Requirements <br />AKA-MD5 (RFC 3310)<br />Security agreement (RFC 3329)<br />SigComp(RFC 3320, RFC 4896, RFC 5049. . )<br />IPsec <br />Media Authorization (RFC 3313)<br />P-headers <br />Service-route Mechanism (RFC 3608)<br />IPv6<br />Preconditions (RFC 4032)<br />IMS Resource Reservation (RFC 3312)<br />Path Header (RFC 3327)<br />SDP Extensions<br />RTCP – Extended Reports<br />RTCP – Feed Back<br />P-preferred-identity<br />P-access-network-info<br />P-asserted-identity<br />P-called-party-id<br />P-charging-vector<br />P-visited-network-id<br />P-associated-uri<br />P-profile-key<br />P-answer-state<br />More . .<br />
  36. 36. Audience Poll<br />In addition to Voice and SMS, which other services will be provided over VoLTE by 2012?<br /><ul><li> Emergency Services E911 (over LTE)
  37. 37. Video Telephony
  38. 38. Presence and IM
  39. 39. Global VoLTE Roaming</li></li></ul><li>RADVISION LTE Testing Solution <br />
  40. 40. RADVISION is the leading provider of core technologies, <br />products and solutions that enable Unified Visual Communications <br />over IP, 3G and emerging next generation IMS networks.<br />RADVISION's mission is to make video a natural part of any electronic interaction – anytime, anywhere and over any device. <br />32<br />
  41. 41. Turnkey Solutions - Professional Services<br />Testing Products<br /> Client Products & Projects<br />SIP Server Products <br />Client Frameworks<br />Server Frameworks<br /> SIP Server <br />Core<br />Presence <br />& Events<br /> B2BUA<br /> Multimedia Terminal Framework<br />Testing & <br />Validation Technology <br />Protocol Toolkits<br />NAT Traversal<br /> MSRP<br />A-RTP<br />Diameter<br /> SIP Developer Suite<br /> IMS SIP Suite<br />H.323<br /> MEGACO<br /> MGCP<br /> 3G-324M<br />End-to-End Product Portfolio<br />
  42. 42. RADVISION’s QoE<br /><ul><li>17 years of experience in Video Conf
  43. 43. Leading Video over IP Core technology
  44. 44. Compliant with leading standards
  45. 45. Vital role in standardization
  46. 46. RADVISION’s IPR
  47. 47. Proprietary advanced QoE technology
  48. 48. Cause analysis and optimization
  49. 49. Human vision database
  50. 50. Unique synchronization algorithm
  51. 51. Video Quality – innovative, unique research
  52. 52. VQ databases and data analysis
  53. 53. VQ assessment techniques
  54. 54. VQ formulas and coefficients
  55. 55. Stream analysis and synchronization
  56. 56. Jointresearch with academia
  57. 57. Image processing
  58. 58. Packet loss analysis
  59. 59. VQ No-Reference algorithms</li></li></ul><li>RADVISION – LTE Testing Solution<br />UE Simulation<br />Network Impairment <br />IMS Core Simulation<br />Media Quality<br />LTE Test Cases<br />Test Report <br />
  60. 60. ProLab<br />ProLab - Testing Architecture<br />Terminal<br />Server <br />Media <br />Emulation <br />Media Quality <br />Automation <br /><ul><li>IMS
  61. 61. SIP
  62. 62. H.323
  63. 63. 3G-324M
  64. 64. SIP Server
  65. 65. IMS Server
  66. 66. Gatekeeper
  67. 67. Media Emulation
  68. 68. Network Impairment
  69. 69. Media Viewer
  70. 70. Audio & Video Playback
  71. 71. Audio MOS Ref-based (PESQ)
  72. 72. Audio MOSNo-reference
  73. 73. Video MOSFull-reference
  74. 74. Video MOS No-reference, Online & offline
  75. 75. XML/API
  76. 76. Test Scheduler
  77. 77. Test ResultAnalysis
  78. 78. Built-in Scripts </li></li></ul><li>Thank you!<br />Sagi Subocki<br />Director of Product Management,<br />Head of IMS Segment<br />RADVISION<br />sagis@radvision.com<br />Eli Cohen <br />Director, Product Management<br />Head of Testing Segment<br />RADVISION <br />elic@radvision.com<br />