1. Next generation networks - next generation feature interaction
Dr Evan Magill

2. today ... Contents : feature interaction: a quick review
next generation networks
changed paradigm
new approaches to interaction

3. a traditional view of the problem feature interaction: a quick review
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

4. traditional approaches feature interaction: a quick review
off-line
full knowledge required
commercial sensitivity
scalability
runtime
partial view
limited knowledge
performance
hybrid
SEBPC
limited work
architectural
TINA
feature interaction: a quick review

5. feature interaction: a quick review
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

6. next generation networks next generation networks
increased use of IP
traffic mix
video
image
voice
data
enabling standards
H323 VoIP SIP Internet Telephony
TINA
CORBA
TAPI TSAPI JAIN Parlay
ADSL ISDN
WAP =====> UMTS
next generation networks

7. next generation networks
Impact volume
more services
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

8. next generation networks
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

9. next generation networks
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

10. changed paradigm Services and features unaware of each other H323 Fn
POTS IN
H323
H245 allows for “service negotiation”
services aware of each other
services can communicate directly
TINA
federation
composition
Call processing Fn F1
changed paradigm

11. new approaches to interaction
changed paradigm
CORBA
removal of signalling limitations
services can communicate directly
services aware of each other
Parlay
interworking - at least directly
peer to peer communication
Service 1
Service n
new approaches to interaction

12. new approaches to interaction new approaches to interaction
peer to peer communication
negotiation
detection
resolution
avoidance
mediation
3rd party e.g. H323 gatekeeper
work to date
Griffeth
issues
languages notations
rules/algorithms
rules per service
upward compatibility
new approaches to interaction

13. new approaches to interaction
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

14. in short 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