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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

Challenges in Reliability & Availability for Seamless Mobility •Michael Ketcham•Motorola Networks Advanced Technology•[email protected]•May, 2007




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-to-end problem and solution space so Seamless Mobility will succeed




Seamless Mobility, AIPN and IMS




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 subscriber-

specific preferences, all held in databases




Seamless Services will have New Behaviors• 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




Problem Space – User Devices

• Complex logic at the edge

• Device interoperability

• Subscriber customization




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 networks




Problem Space – Leverage IP Core







• Maximize capabilities for service resilience and differentiated svc resilience provided by the IP/MPLS core




Problem Space – Control Core








• Managing IMS / Signaling / data query complexity

• Complex interworking with CSF, Policy and Application Services

• Network element and Functional Element R&A




Problem Space – Server Core







• Dynamic, distributed databases

• Potential inconsistency & delay in view of network state and databases holding dynamic sub and session state








Problem Space – Operations







• Dynamic, distributed databases

• Potential inconsistency & delay in view of network state and databases holding dynamic sub and session state





• Service 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

Documents

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