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  • DOCSISRev. A00

    Confidential & Proprietary Information of VeEX Inc

  • Items for discussionAgendaDOCSIS/EuroDOCSISOverview of Standards, Features & BenefitsDOCSIS 3.0/EuroDOCSIS 3.0CATV Market DynamicsNew Technical Directions & FeaturesNetwork PreparationDOCSIS*Confidential & Proprietary Information of VeEX Inc

    Confidential & Proprietary Information of VeEX Inc

  • DOCSIS Review*Confidential & Proprietary Information of VeEX IncOverview, Features & Benefits

    Confidential & Proprietary Information of VeEX Inc

  • DOCSIS system Enables transparent bi-directional of Internet Protocol (IP) traffic, between the cable system headend and customer locationDOCSIS specificationDefines PHY & MAC layer protocols for communication & Ethernet frame transport between CMTS & CMDOCSIS network comprises:Cable Modem Termination System (CMTS) located at the headendCable Network - an all-coaxial or hybrid-fiber/coax (HFC) cable networkCable Modem (CM) located at the Customer PremiseAn OverviewDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • MilestonesDOCSISDOCSIS*Confidential & Proprietary Information of VeEX Inc

    Confidential & Proprietary Information of VeEX Inc

  • HFC Spectrum AllocationDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*The frequency spectrum used in an HFC network is split into two parts:Downstream spectrum which delivers services from the headend to the end userUpstream spectrum for sending traffic from the end user to the operator

    Confidential & Proprietary Information of VeEX Inc

  • The DOCSIS Specification defines Modulation and Coding Schemes outlined in the following table for the UpstreamUpstream Physical LayerDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • The DOCSIS Specification defines Modulation and Coding Schemes outlined in the following table for the DownstreamDownstream Physical LayerDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • Ranging is used to synchronize CMs and align them with the CMTSTDMA requires coarse alignment (800 nsec)S-CDMA requires accurate alignment (1 nsec)CM sends a RNG-REQ messageCMTS responds with a RNG-RSP messageContains Timing Adjust (Resolution = 0.3815 nsec)also Power adjust, Frequency adjust, Pre-EQ parametersRanging is a two-step process:Initial maintenance (coarse time alignment)Periodic station maintenance (fine time alignment)Power RangingDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • DOCSIS MAC Forms part of the data link layer that supports topology dependent functionsUses services of the Physical Layer to provide services to the Logical Link Control (LLC) In the OSI 7-layer model, the Media Access Control is a part of layer 2, the data link layer.CM Protocol StackDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • Media Access Control (MAC) Sub-LayerControls access to the Physical Layer (the channel)Allows multiple users to share a communications channelSeparate physical channels (upstream/downstream) controlled by the CMTSNo direct peer-to-peer (CM-to-CM) communicationDownstream MACOnly one transmitter (CMTS) and multiple receivers (CMs)Quality of Service (QoS) can be assured by:Token bucket rate limiting, Reserved data rates, Traffic PriorityUpstream MACMultiple transmitters (CM) with One receiver (CMTS)The CMTS arbitrates access to the channelEach upstream channel is described in mini-slotsMAP messages are broadcast downstream to describe which CM can transmit and whenAccess Control is Reservation based Media Access Control (MAC) DOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • DHCP ServerAssigns IP addresses to client computersAddresses are leased to clients (Cable Modems or CPEs) for a period of timeIP addresses can be reserved for specific clients or assigned from poolsClients may be authenticated based on their MAC addressAddress may be assigned from different pools based on extended optionsDHCP ProcessThe DHCP server requests the following parameters from the Cable Modem (CM):IP address of the CMIP address of the TFTP Server (for DOCSIS Configuration file)IP address of the DHCP Relay Agent (if DCHP server resides on a different network)TFTP/DOCSIS Configuration file nameSubnet Mask to be used by the CMDefault IP GatewayTime of Day Server and SYSLOG Server IP addressDHCP Server & ProcessDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • Time of Day (ToD) ServerInternet Time Protocol (ITP) per RFC 868UDP and TCP requests honored on port 3732-bit value defining the number of seconds since 00:00 (midnight January 1, 1900 GMT)Time of Day (TOD) ServerDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • TFTP ServerDOCSISDOCSISConfidential & Proprietary Information of VeEX Inc*TFTP (Trivial File Transfer Protocol) ServerIn accordance with RFC 1350UDP port 69Small and easy to implement with read and write to and from remote serversThe following settings are mandatory in the TFTP configuration file:Network Access Configuration SettingClass of Service Configuration SettingThe following settings are optional:Downstream FrequencyUpstream Channel IDVendor IDBaseline PrivacySNMP Write-Access Control, SNMP MIB Object & SNMP IP Address (if applicable)Software Server IP AddressCPE Ethernet MAC AddressVendor-Specific Configuration (if applicable)

    Confidential & Proprietary Information of VeEX Inc

  • DOCSIS 3.0CATV Market DynamicsConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • Support new high bandwidth services of 50 to 100MbpsMigrate existing customers to higher tier servicesBetter and more robust data encryptionProvide more IP address space using IPv6Limit and reduce node splits Reduce overall cost of CMTS portsIndependent scalability of upstream & downstreamBusiness DriversDOCSIS 3.0DOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • Higher Bandwidth ApplicationsDOCSIS 3.0DOCSIS*Confidential & Proprietary Information of VeEX Inc

    Confidential & Proprietary Information of VeEX Inc

  • Consumers greed for speedDOCSIS 3.0*DOCSISConfidential & Proprietary Information of VeEX Inc

    Confidential & Proprietary Information of VeEX Inc

  • High bandwidth residential data and contentVideo and photo uploadsProliferation of social networking sites and applicationsIP Video over DOCSIS (VDOC)High definition Video to multiple devicesPCs, hybrid STBs, portable devicesHigh bandwidth Internet streamingHigh Bandwidth Video conferencingCisco TelePresenceCommercial serviceHigh bandwidth symmetrical data servicesBonded E1/T1 circuit emulationHigh bandwidth Ethernet / L2VPN services

    Services driving Channel BondingDOCSIS 3.0DOCSISConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • DOCSIS 3.0New Technical Directions & FeaturesConfidential & Proprietary Information of VeEX Inc*

    Confidential & Proprietary Information of VeEX Inc

  • Major Feature OverviewDOCSIS 3.0DOCSIS*Confidential & Proprietary Information of VeEX Inc

    Confidential & Proprietary Information of VeEX Inc

  • Channel bonding basically means data is transmitted to/from Cable Modems using multiple individual RF channels instead of a single channel

    Channel BondingDOCSIS 3.0DOCSISConfidential & Proprietary Information of VeEX Inc*Using DOCSIS 3.0, data is transmitted to cable modems using multiple channels

    Confidential & Proprietary Information of VeEX Inc

  • Throughput ComparedDOCSIS 3.0DOCSISConfidential & Proprietary Information of VeEX Inc*

    DOCSIS VersionDate Rates Annex ADownstreamUpstream1.1~ 55.62 (50) Mbps10.29 (9) Mbps2.0~ 55.62 (50) Mbps30.72 (27) Mbps3.0 (4 Channels)~ 222.48 (200+) Mbps 122.88 (108+) Mbps3.0 (8 Channels)~ 444.96 (400+) Mbps 122.88 (108+) Mbps

    Confidential & Proprietary Information of VeEX Inc

  • Advanced Time Division Multiple Access (A-TDMA)Used widely in DOCSIS 2.0 and DOCSIS 1.1 systemsCMs transmit one at a time, occupying the entire upstream channel during transmissionTransmissions consist of a preamble, data burst, and guard time Better immunity to narrowband interferers and generally performs better above 15 MHzSynchronous Code Division Multiple Access (S-CDMA)Applicable to DOCSIS 2.0/3.0 systems onlyMultiple CMs able to transmit simultaneously with shorter preamble and no guard timesBetter immunity to burst noise and performance below 15 MHzUpstream PHY ModesDOCSIS 3.0DOCSISConfidential & Proprietary Information of VeEX Inc*5MHz42MHz or 65MHz

    Confidential & Proprietary Information of VeEX Inc

  • Cable Modem Termination System (CMTS)A downstream packet stream or flow is distributed to a set of channels called the Downstream Bonding Group (DBG)Bonded packets are marked with a sequence #A Downstream Service ID (DSID) identifies a stream of packets

    Cable Modem (CM)Bonded packets can arrive out of orderBonded packe

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