Upstream QAM Certification DOCSIS 3.0 Presenter: Tony Holmes

Transcription

1 In cooperation with Upstream QAM Certification DOCSIS 3.0 Presenter: Tony Holmes CCTA 2014 Technical Training San Juan, PR

2 Seminar Overview HFC Network Architecture Return Path Challenges DOCSIS 3.0 Overview Testing the Return Path Using an Upstream Generator with FEC Measuring/Analyzing Upstream Parameters Live Demonstration of Return Path Impairments Presentation Name Here Confidential & Proprietary Information of VeEX Inc. 2

3 Broadband Arcitectures Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 3

4 HFC Network Structure Return Path Node Optical Link Optical AMP Amplifier Headend Return Path Tap #1 Return Path: Cable Modem Signal Tap #2 Cable Modems in each home are sending data back to the CMTS which is located in the Headend Home #1 Home #2 Cable Modems on the same coaxial cable are time sharing the bandwidth: 5 MHz to 42 MHz (Annex B) 5 MHz to 65 MHz (Annex A) Home #3 Home #4 Confidential & Proprietary Information of VeEX Inc. 4

5 Return Path Test Points Node Optical Link Optical AMP Amplifier Headend Tap #1 TP 1: CMTS receiving signal quality TP 2: RF level before electrical to optical conversion 5 Tap #2 TP 3: RF amplifier power output and tilt balancing with TP 4 TP 4: RF amplifier input signal level TP 5: Tap #1 signal from Home #1 cable modem Home #1 Home #2 Home #3 6 7 Home #4 TP 6: Tap #2 signal from Home #3 cable modem TP 7: Signal loss between TP 6 and TP7 Confidential & Proprietary Information of VeEX Inc. 5

6 HFC Return Path Increase Upstream Bandwidth; What are the Problems? Operators increase Return Path bandwidth by using higher QAM64, 128, 256. Higher QAM introduces: More noise sources affecting QAM64, 128 and 256 Must verify transmission quality with Return Path QAM analysis dbmv MHz Confidential & Proprietary Information of VeEX Inc. 6

7 Return Path Challenges Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 7

8 The Challenges Real Time Signals Voice over IP (CATV) Off air broadcasting (Telcos) Perception of Industries Telephone Companies Cable Operators Technology and Tools MPEG-4 (Telcos) Automated ingress monitoring system (CATV) Confidential & Proprietary Information of VeEX Inc. 8

9 The Weakest Link Presentation Name Here Confidential & Proprietary Information of VeEX Inc. 9

10 Ingress Funneling Effect Bi-directional system return path funnelling effect Presentation Name Here Confidential & Proprietary Information of VeEX Inc. 10

11 Impairments Radio Communications and Transient Noise Presentation Name Here Confidential & Proprietary Information of VeEX Inc. 11

12 DOCSIS 3.0 Presentation Name Here Confidential & Proprietary Information of VeEX Inc. 12

13 DOCSIS An Overview DOCSIS system Enables transparent bi-directional of Internet Protocol (IP) traffic, between the cable system headend and customer location DOCSIS specification Defines PHY & MAC layer protocols for communication & Ethernet frame transport between CMTS & CM DOCSIS network comprises: Cable Modem Termination System (CMTS) located at the headend Cable Network - an all-coaxial or hybrid-fiber/coax (HFC) cable network Cable Modem (CM) located at the Customer Premise Transparent IP traffic Wide Area Network Cable Network (HFC) CMTS Cable Modem CPE CMTS/WAN Interface CM/CPE Interface DOCSIS Confidential & Proprietary Information of VeEX Inc 13

14 DOCSIS Milestones DOCSIS 1.0 (1999) 1 st products certified (CableLabs started project in 1996) Open standard for high-speed data over cable Modest security, Best-effort service DOCSIS 1.1 (2000) Quality-of-Service (QoS) service flows Baseline Privacy Interface (BPI+) Certificates Improved privacy & encryption process DOCSIS 2.0 (2002) Improved throughput & robustness on Upstream 64/128 QAM modulation & higher symbol rates with FEC Programmable interleaving to upstream channels DOCSIS 3.0 (2006) Channel bonding (4U/4D) for increased capacity IPv6 support Improved security (AES) DOCSIS Confidential & Proprietary Information of VeEX Inc 14

15 DOCSIS 3.0 Business Drivers Support new high bandwidth services of 50 to 100Mbps Migrate existing customers to higher tier services Better and more robust data encryption Provide more IP address space using IPv6 Limit and reduce node splits Reduce overall cost of CMTS ports Independent scalability of upstream & downstream DOCSIS Confidential & Proprietary Information of VeEX Inc 15

16 DOCSIS 3.0 Higher Bandwidth Applications Digital Photos Web 2.0 Home Networks Gaming Data & VoIP MP3 WMV VOD DVR/PVR DVD Blu-ray You Tube SDTV HDTV Mobile Video ipod Walkman DOCSIS Confidential & Proprietary Information of VeEX Inc 16

17 DOCSIS 3.0 Consumers greed for speed DOCSIS Confidential & Proprietary Information of VeEX Inc 17

18 DOCSIS 3.0 Services driving Channel Bonding High bandwidth residential data and content Video and photo uploads Proliferation of social networking sites and applications IP Video over DOCSIS (VDOC) High definition Video to multiple devices PCs, hybrid STBs, portable devices High bandwidth Internet streaming High Bandwidth Video conferencing Cisco TelePresence Commercial service High bandwidth symmetrical data services Bonded E1/T1 circuit emulation High bandwidth Ethernet / L2VPN services DOCSIS Confidential & Proprietary Information of VeEX Inc 18

19 DOCSIS 3.0 Major Feature Overview Increased DS bandwidth Increased US bandwidth IPv6 Backwards compatibility IP Multicast Commercial Bonded Downstream Channels 56Mbps (RAW) each, 448Mbps Total Bonded Upstream Channels 27Mbps (RAW) each, 122Mbps Total IPV6 allows for 3.4x10 38 IP addresses IP addresses are lengthened from 32 bits to 128 bits Existing DOCSIS 1.0, 1.1 and 2.0 systems Scalable deployment with easy subscriber migration IPTV-type applications Efficient switched-video-like bandwidth usage E1 & T1 circuit emulation Network Security Early Authentication and Encryption (EAE) and AES 128bit encryption which is more robust and secure DOCSIS Confidential & Proprietary Information of VeEX Inc 19

20 DOCSIS 3.0 DS Channel Bonding Channel bonding basically means data is transmitted to/from Cable Modems using multiple individual RF channels instead of a single channel Using DOCSIS 3.0, data is transmitted to cable modems using multiple channels DOCSIS Confidential & Proprietary Information of VeEX Inc 20

21 DOCSIS 3.0 Upstream Bonding Using DOCSIS 3.0, upstream data is transmitted using multiple channels Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 21

22 DOCSIS 3.0 Throughput Compared DOCSIS Version Downstream Date Rates Annex A Upstream 1.1 ~ (50) Mbps (9) Mbps 2.0 ~ (50) Mbps (27) Mbps 3.0 (4 Channels) ~ (200+) Mbps (108+) Mbps 3.0 (8 Channels) ~ (400+) Mbps (108+) Mbps DOCSIS Confidential & Proprietary Information of VeEX Inc 22

23 DOCSIS 3.0 Quick Summary DOCSIS 3.0 review Physically the same as DOCSIS 2.0 signals Consists of multiple QAM signals bonded logically together Bonded channels can be contiguous or non-contiguous: Contiguous - consists of frequency consecutive signals Non-contiguous interspersed with other carriers MPEG-2 transport for downstream signals QAM transport for upstream signals IPv4 or IPv6 support Enhanced security using EAE, etc. DOCSIS Confidential & Proprietary Information of VeEX Inc 23

24 Testing the Return Path Upstream Certification Presentation Name Here Confidential & Proprietary Information of VeEX Inc. 24

25 SLM with DOCSIS 3.0 Cable Modem Upstream Generator with FEC Tools of the Trade Return Path Testing QAM Analyzer Spectrum Analyzer Return Path Sweep Leakage Detection Confidential & Proprietary Information of VeEX Inc. 25

26 Activate the Cable Modem Check the DS and US power levels Results should be displayed Confidential & Proprietary Information of VeEX Inc. 26

27 Access to All Downstream Carriers and Upstream Confidential & Proprietary Information of VeEX Inc. 27

28 Using an USG with FEC USG Setup menu: 1. Enter the USG test parameters, then tap Start 2. Select Remote for shortcuts to allow quick access of Spectrum and Return Path Analysis Modes CX380 Remote View Option Confidential & Proprietary Information of VeEX Inc. 28

29 Upstream Certification At 60 MHz Marginal Ingress Presence of Ingress Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 29

30 Upstream Certification At 39 MHz Marginal Ingress Presence of Ingress Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 30

31 Upstream Certification At 15 MHz Marginal Ingress Presence of Ingress Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 31

32 Histogram Analysis No Errors With Pre and Post Errors Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 32

33 Linear Distortions & QAM Ingress QAM Impairments Linear Distortions QAM Ingress Shows noise under the QAM carrier Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 33

34 Noise in the Return Band Spectrum Analyzer Return Path QAM Analysis Quick Guide Confidential & Proprietary Information of VeEX Inc. 34

35 MER/BER Demonstration Impairment simulation Presentation Name Here Confidential & Proprietary Information of VeEX Inc. 35

36 Thank You Questions? Tony Holmes Tel: (510) For more info on VeEX products Please contact our Caribbean Value Added Reseller (VAR) Confidential & Proprietary Information of VeEX Inc. 36