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ITU-T Workshop on Multimedia Convergence Broadband Delivery and In-home Distribution Geneva, Switzerland 12 – 15 March 2002 Doug Jones Chief Architect, YAS Broadband Consultant to CableLabs® [email protected], +1 303.661.3823 Agenda • Workshop Question • Device Types – Access – Bridge – End-point • Technology – – – – – Provisioning Network Management Quality of Service Network address management Security Workshop Questions • Overview of the different solutions, future evolution – e.g. broadband cable, DSL • Minimum requirements to ensure interworking and interoperability Home Is Where The Net Is • For the service provider, a converged network is – Common provisioning/management/security • For the consumer, a converged applications means – Device-independence – Same “look and feel” – Ease of use, plug and play • Mix of IP and MPEG • Multiple technologies & services, one network • Best in Class – security, provisioning, management – Voice, data, video Broadband Advantages • Capacity MPEG MPEG MPEG services MPEG services services – Multiple Gigabits VIDEO VIDEO Broadband Network • Interactivity Home Platform(s) – MPEG/IP (video, data, voice) • Security VOICE VOICE MPEG MPEG IP services services MPEG services – It’s not just technology, it’s a service – For the subscriber, and for the network operator • Management – Providing end-to-end services VIDEO DATA VIDEO Service Opportunities MPEG content WAN LAN 1. proprietary home 1. proprietary home control and telemetry control and telemetry systems systems 2. Managed Firewall, 2. Managed Firewall, NAT, DCHP, and other NAT, DCHP, and other LAN technologies LAN technologies high-value network Access Network gateway 3. intercom, paging, 3. intercom, paging, and other home and other home communications communications services services Internet 4. streaming media and 4. streaming media and other entertainment other entertainment services services Residential & Business (small and large) Confederation with Other Work • • • • • • • J.112 IPCablecom IETF DVB SCTE Many others, Etc. Should apply technology consistently Home Networking Devices Modes of Operation • Autonomous configuration by the user • Configured by a service/network provider – provider can grant the user access to specific features and functions Should not constrain business models Types of Networking • IP services – VPNs, gaming, chat, e-commerce, etc. – Even in the presence of NAT and NAPT • IETF RFC 3235: NAT-friendly application design guidelines • Native MPEG services – Traditional digital video • • • • Analog video ? Home network should support all Difficult to choose a datalink technology Hide complexity from the user Home Networking Architecture (Example) WAN (2-way, real time, interactive) C LAN A B B Home Network Home Network A = Access Point B = Home Bridge C = Client end-point N = Non-compliant end point C Home Network N N • Illustrate basic functions • Secure provisioning & mgmt • Not datalink specific N Access Device • “Residential Gateway” • MPEG Functions – Storage – Multiplexing – Rate transcoding • IP functions – – – – – – Dynamic Host Configuration Protocol (DHCP) Network Address Translation (NAT) Network Address Port Translation (NAPT) Domain Name Service (DNS) WAN LAN Firewall B A C Virus Checking C Home Network Home Network B Home Network N N N Access (A) Device Embedded or Stand-Alone • Standalone A-device connects externally to a home broadband access modem – E.g., a cable modem of DSL modem • Embedded A-device is built into same physical enclosure as the modem Illustrates security concerns Bridging Device • interconnect different types of data links – Wired, wireless – Synchronous, asynchronous – E.g., 802.2, 802.11, HPNA™, HomeRF™, etc. • QoS aware WAN C LAN A Home Network Home Network B B Home Network C N N N Compliant End-Device • Terminates the managed domain – provisioning/management – QoS • Want to keep light-weight, but.. – Still needs DHCP, FTP, and SNMP ? WAN C LAN A Home Network Home Network B B Home Network C N N N Non-Compliant End Device • Devices connected to the Home LAN, but that do not meet the requirements • They really cannot be dealt with, may not even know they are there WAN C LAN A Home Network Home Network B B Home Network C N N N Technology Discussions • • • • • Provisioning Network Management Quality of Service Network address management Security Trade-off’s • In-use protocols – DHCP, TOD, TFTP, etc. – Could be perceived as heavy-weight • Emerging protocols – Universal Plug and Play (UPnP) – Jini™ – Etc. • Need to make proper technology choices Provisioning • Devices configurable over the WAN – Allows network provider to offer the service • Standard methods – DHCP, TFTP, SNMP – Fit with existing back-end offices • Security – Essential for stand-alone devices Network Management • SNMP is attractive due to security – SNMPv3 User-based Security Model (USM) • RFC 2574 • Privacy, authentication – SNMPv3 View-based Access Control Model (VACM) • RFC 2575 • Flexible view-based access – SNMP Coexistence • RFC 2576 • Allows VACM with any of SNMPv1/v2/v3 • USM only with SNMPv3 • But other protocols may be lighter weight – UPnP, Jini, etc. Security is Key ! Quality of Service • Data link should support QoS – But can the specific data link be specified ? • Upper layer mechanism to signal QoS, lower layer mechanism to implement it – E.g., upper layer such as RSVP or SIP/SDP – E.g., lower layer such as IEEE 802.1p or Subnet Bandwidth Manager (SBM, RFC 2814) • Authenticated messaging Network Address Management • Dynamic Host Configuration Protocol (DHCP) – IPv4 and IPv6 • • • • Network Address Translation (NAT) Network Address Port Translation (NAPT) Domain Name Service Routing vs. Switching Security • For both service provider and user • Privacy – Already in IPCablecom and J.112 – Needed in-home ? • Datalink or application layer ? • Authentication – Public Key Infrastructure • Which certificate provider? • Digital Rights Management Summary • ITU standard - Huge opportunity for service providers and equipment manufacturers • Allow service providers to offer service • Secure provisioning and management • Tailor technology choice for in-home use ITU-T Workshop on Multimedia Convergence Broadband Delivery and In-home Distribution Geneva, Switzerland 12 – 15 March 2002 Doug Jones Chief Architect, YAS Broadband Consultant to CableLabs® [email protected], +1 303.661.3823