Transcript Challenges in Reliability and Availability for Seamless Mobility

Challenges in Reliability &
Availability for Seamless Mobility
•Michael Ketcham
•Motorola Networks Advanced Technology
•[email protected]
•May, 2007
Motorola General Business Use
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc.
20XX.
2007 IEEE Communications
Quality & Reliability
Starting Point
• Motorola is delivering seamless mobility
 All-IP Networks (AIPN)
 Control via IP Multi-media Services (IMS)
• Success of seamless services depends on subscribers’
total quality of experience
• Seamless services over AIPN with new control elements
will have challenging new behaviors
• We have the responsibility of understanding the end-toend problem and solution space so Seamless Mobility will
succeed
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
Seamless Mobility, AIPN and IMS
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
What is a “Service”?
• Services as perceived by the end-user
• Services are inherently recursive –
 Services embed services
 Services connect to services
• Services will change state in the middle of service delivery
 New features will be triggered, spawning services
 Services will be mobile and move between networks
• Services will be data-driven
 Machine-readable definition of a service is held in a database –
Operators can create new services by adding a few data entries
 Service behavior will change based on subscriber data and subscriberspecific preferences, all held in databases
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
Seamless Services will have New
Behaviors
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Operators will need to coordinate services carried across networks with different design targets,
operations paradigms and user expectations.
Providers will have vastly more complex design and verification issues with converged networks
than with traditional cellular networks
 New difficulties in designing for specified availability targets, coordinating diagnostics, or verifying
availability
Converged services are expected to be carried across all-IP architectures, which will have
significantly different behaviors that today’s wireless infrastructures.
 All-IP networks require understanding IP best practices for system design and selection of protocols
for service survivability
New data-driven and policy-driven services will have new behaviors
 New services can be created dynamically and invoke varying sets of applications
Service reliability will depend as much on the data architecture as on the physical architecture
Operations systems will need new techniques to identify services and monitor successful delivery
of services for accurate statistics and fault management
Services will have new behaviors at both the edge and the core
 Intelligent end devices will make complex service-impacting decisions
 Service delivery will depend on residential and enterprise CPE networks not managed by the service
provider
 Users will configure service behavior with individualized device settings and preferences
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
Problem Space – User Devices
• Complex
logic
at the edge
• Device
interoperability
• Subscriber
customization
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
Problem Space – Access Networks
• Single
Points of
Failure in access
networks
• Optimal redundancy
/ cost trade off for
edge devices
• Status messaging,
alarming and fault
management in
broadly distributed
• non-hierarchical
Complex logic
at the edge
• Device
networks
interoperability
• Subscriber
customization
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
Problem Space – Leverage IP Core
• Single Points of
• Maximize
capabilities
for service resilience
and differentiated svc
resilience provided by
the IP/MPLS core
Failure in access
networks
• Optimal redundancy /
cost trade off for edge
devices
• Status messaging,
alarming and fault
management in
broadly distributed
non-hierarchical
networks
• Complex logic
at the edge
• Device
interoperability
• Subscriber
customization
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
Problem Space – Control Core
• Single Points of
Failure in access
networks
• Optimal redundancy /
cost trade off for edge
devices
• Status messaging,
alarming and fault
management in
broadly distributed
non-hierarchical
networks
• Complex logic
at the edge
• Device
interoperability
• Subscriber
customization
Motorola General Business Use
• Maximize capabilities
for service resilience
and differentiated svc
resilience provided by
the IP/MPLS core
• Managing
IMS /
Signaling / data query
complexity
• Complex interworking
with CSF, Policy and
Application Services
• Network element and
Functional Element R&A
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
Problem Space – Server Core
• Single Points of
• Maximize capabilities
Failure in access
networks
• Optimal redundancy /
cost trade off for edge
devices
• Status messaging,
alarming and fault
management in
broadly distributed
non-hierarchical
networks
for service resilience
and differentiated svc
resilience provided by
the IP/MPLS core
• Complex logic
at the edge
• Managing IMS /
• Device
Signaling / data query
complexity
• Complex
interworking with
CSF, Policy and
Application Services
• Network element and
Functional Element
R&A
interoperability
• Subscriber
customization
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
• Dynamic,
distributed
databases
• Potential
inconsistency & delay
in view of network
state and databases
holding dynamic sub
and session state
Problem Space – Operations
• Single Points of
• Maximize capabilities
Failure in access
networks
• Optimal redundancy /
cost trade off for edge
devices
• Status messaging,
alarming and fault
management in
broadly distributed
non-hierarchical
networks
for service resilience
and differentiated svc
resilience provided by
the IP/MPLS core
databases
• Potential
inconsistency & delay
in view of network
state and databases
holding dynamic sub
and session state
• Service
• Complex logic
at the edge
• Managing IMS /
• Device
Signaling / data query
complexity
• Complex
interworking with
CSF, Policy and
Application Services
• Network element and
Functional Element
R&A
interoperability
• Subscriber
customization
Motorola General Business Use
• Dynamic, distributed
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.
verification
and monitoring for
dynamically
defined services
• Verification of
service svc
functionality
• Automatic problem
detection and
handling
• Manual fault mgt
Conclusion
• Seamless Services across All-IP Networks introduce new
quality, reliability & availability challenges
• Leverage what we know from successes and solutions in
Motorola’s existing capabilities
Motorola General Business Use
2007 IEEE Communications
Quality & Reliability
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners. © Motorola, Inc. 20XX.