itu-t workshop on multimedia convergence broadband delivery and in-home distribution geneva,...
TRANSCRIPT
![Page 1: ITU-T Workshop on Multimedia Convergence Broadband Delivery and In-home Distribution Geneva, Switzerland 12 – 15 March 2002 Doug Jones Chief Architect,](https://reader030.vdocuments.us/reader030/viewer/2022032709/56649ea45503460f94ba9177/html5/thumbnails/1.jpg)
ITU-T Workshop on Multimedia Convergence
Broadband Delivery and In-home Distribution
Geneva, Switzerland 12 – 15 March 2002
Doug JonesChief Architect, YAS Broadband
Consultant to CableLabs®[email protected], +1 303.661.3823
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Agenda• Workshop Question• Device Types
– Access– Bridge– End-point
• Technology– Provisioning– Network Management– Quality of Service– Network address management– Security
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Workshop Questions
• Overview of the different solutions, future evolution– e.g. broadband cable, DSL
• Minimum requirements to ensure inter-working and interoperability
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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
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Broadband Advantages• Capacity
– Multiple Gigabits
• Interactivity– MPEG/IP (video, data, voice)
• Security– It’s not just technology, it’s a service– For the subscriber, and for the network operator
• Management– Providing end-to-end services
HomePlatform(s)
VOICEVOICE
VIDEOVIDEO
MPEGservices
MPEGservices
BroadbandNetwork
HomePlatform(s)
VOICEVOICE
VIDEOVIDEO
MPEG
services
MPEG
VIDEOVIDEOVIDEODATA
MPEGservices
MPEGservices
MPEG
services
IP
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Service Opportunities
high-valuenetwork
gatewayAccess Network
4. streaming media andother entertainment
services
4. streaming media andother entertainment
services
MPEG content
3. intercom, paging,and other homecommunications
services
3. intercom, paging,and other homecommunications
services
2. Managed Firewall,NAT, DCHP, and other
LAN technologies
2. Managed Firewall,NAT, DCHP, and other
LAN technologies
1. proprietary homecontrol and telemetry
systems
1. proprietary homecontrol and telemetry
systems
Internet
WAN LAN
Residential & Business (small and large)
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Confederation with Other Work
• J.112• IPCablecom• IETF• DVB• SCTE• Many others, Etc.• Should apply technology consistently
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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
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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
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Home Networking Architecture(Example)
A = Access Point B = Home Bridge C = Client end-point N = Non-compliant end point
A
N N
B
N
B
C
HomeNetwo
rkHomeNetwo
rk
HomeNetwo
rk
WAN(2-way,
real time, interactiv
e)
LANC
• Illustrate basic functions• Secure provisioning &
mgmt• Not datalink specific
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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)– Firewall– Virus Checking
A
N N
B
N
B
C
HomeNetwork
WAN LAN CHome
Network
HomeNetwor
k
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Access (A) DeviceEmbedded 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
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Bridging Device
• interconnect different types of data links– Wired, wireless– Synchronous, asynchronous– E.g., 802.2, 802.11, HPNA™, HomeRF™,
etc.
• QoS awareA
N N
B
N
B
C
HomeNetwork
WAN LAN CHome
Network
HomeNetwor
k
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Compliant End-Device
• Terminates the managed domain– provisioning/management– QoS
• Want to keep light-weight, but..– Still needs DHCP, FTP, and SNMP ?
A
N N
B
N
B
C
HomeNetwork
WAN LAN CHome
Network
HomeNetwor
k
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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
A
N N
B
N
B
C
HomeNetwork
WAN LAN CHome
Network
HomeNetwor
k
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Technology Discussions
• Provisioning• Network Management• Quality of Service• Network address management• Security
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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
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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
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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 !
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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
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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
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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
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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
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ITU-T Workshop on Multimedia Convergence
Broadband Delivery and In-home Distribution
Geneva, Switzerland 12 – 15 March 2002
Doug JonesChief Architect, YAS Broadband
Consultant to CableLabs®[email protected], +1 303.661.3823