Transcript ITU-T Workshop on Multimedia Convergence Geneva, Switzerland 12

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