Transcript No Slide Title

Next generation networks - next generation feature
interaction
Dr Evan Magill
today ...
Contents :
• feature interaction: a quick review
• next generation networks
• changed paradigm
• new approaches to interaction
[email protected]
FORCES : IEE Colloquium : London’99
Slide 2
a traditional view of the problem
• interference between the actions of independently
written telecommunications features
• as a simple example is CFB and CW on a single user
CW
CFB
feature interaction: a quick review
[email protected]
FORCES : IEE Colloquium : London’99
Slide 3
traditional approaches
• off-line
• full knowledge required
• commercial sensitivity
• scalability
• runtime
• partial view
• limited knowledge
• performance
• hybrid
• SEBPC
• limited work
• architectural
• TINA
• limited work
[email protected]
feature interaction: a quick review
FORCES : IEE Colloquium : London’99
Slide 4
impact
• the problem has been constrained
• regulated market
• vendor testing
• caught by network provider testing
• relatively few features
• tolerance
• market values
• only private networks with large feature counts
• low feature uptake per user
• multimedia
• isolated working
feature interaction: a quick review
[email protected]
FORCES : IEE Colloquium : London’99
Slide 5
next generation networks
• increased use of IP
• traffic mix
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video
image
voice
data
• enabling standards
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H323 VoIP
TINA
CORBA
TAPI TSAPI JAIN
ADSL ISDN
WAP =====> UMTS
SIP Internet Telephony
Parlay
next generation networks
[email protected]
FORCES : IEE Colloquium : London’99
Slide 6
Impact volume
• more services
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larger margins in service provisioning
de-regulated market
new markets
open service provisioning
migration of services to periphery of network
mobile data services
improved service creation
• increased interworking between networks
• increased inter-service working across public & private networks
• pan-European services
next generation networks
[email protected]
FORCES : IEE Colloquium : London’99
Slide 7
Impact nature
• Increased multimedia applications
• increased number of application outside the network
• increased interworking between applications
• in different (types) networks
• inside and outside the network
• provided by different service providers
• increased competition
• time-to-market
• validation
• compatibility
next generation networks
[email protected]
FORCES : IEE Colloquium : London’99
Slide 8
Impact interactions
• increased number
• different nature on interaction
• more complicated services
• different service locations & owners
• even between identical services
• video conference and roles
• between near identical services
• video conference cardinality
• the basic tenet that services can added rapidly, easily
and safely by (third) parties is jeopardised by feature
interaction
next generation networks
[email protected]
FORCES : IEE Colloquium : London’99
Slide 9
changed paradigm
• Services and features unaware of each other
• POTS
• IN
Call processing
• H323
F1
Fn
• H245 allows for “service negotiation”
• services aware of each other
• services can communicate directly
• TINA
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federation
composition
services aware of each other
services can communicate directly
changed paradigm
[email protected]
FORCES : IEE Colloquium : London’99
Slide 10
changed paradigm
• CORBA
• removal of signalling limitations
• services can communicate directly
• services aware of each other
Service 1
Service n
• Parlay
• interworking - at least directly
• services aware of each other
• services can communicate directly
• peer to peer communication
• services aware of each other
• services can communicate directly
new approaches to interaction
[email protected]
FORCES : IEE Colloquium : London’99
Slide 11
new approaches to interaction
• peer to peer communication
• negotiation
• detection
• resolution
• avoidance
• mediation
• 3rd party e.g. H323 gatekeeper
• work to date
• Griffeth
• issues
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languages
notations
rules/algorithms
rules per service
upward compatibility
[email protected]
new approaches to interaction
FORCES : IEE Colloquium : London’99
Slide 12
some initial work
• TINA federation
• simple notation to describe service capabilities
• cardinality
• connections
• rules
• in general identical for federation
• cardinality can be negotiated
new approaches to interaction
[email protected]
FORCES : IEE Colloquium : London’99
Slide 13
in short
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changing nature of regulations, services and networks
increased volume of services
increased volume and complexity of service interactions
new opportunities for interaction avoidance
• peer to peer communication
• negotiation and mediation
To conclude
[email protected]
FORCES : IEE Colloquium : London’99
Slide 14