PCS in Telephony Intelligent Network versus ICEBERG Bhaskaran
PCS in Telephony & Intelligent Network versus ICEBERG Bhaskaran Raman Network Reading Group Friday, Feb 5 1999 10/29/2020 1
Outline • Personal Communication Services (PCS) in telephony • IN architecture (very high level) • Relation to ICEBERG 10/29/2020 2
Personal Communication Services 10/29/2020 3
What is PCS? • Vague term - not well defined • Personalised voice, data, image, video • Three types of mobility: – Terminal mobility (network level) – Personal mobility (across access devices and networks) – Service mobility (see the same personal service profile) 10/29/2020 4
What is PCS? • PCS also talks about customization & security • From telephone network background – service providers and subscribers – trusted network – dumb end-points • Interworking is required between service providers 10/29/2020 5
The Networks • • • Fixed Networks (POTS) Cellular (e. g. GSM) Digital Cordless (e. g. DECT) Wireless data (e. g. GPRS) Satellite 10/29/2020 6
PCS in Fixed Networks • • • Call Screening Personal Numbering (Hotline) Profile Management Call Forwarding Automatic Callback 10/29/2020 7
UPT • Subscriber has personal number • Billing and service profiles based on the personal number • Service availability across different (fixed) networks 10/29/2020 8
GSM • • Does not provide full PCS Handles terminal mobility well No complete integration with cordless SIM: provides another kind of mobility 10/29/2020 9
UMTS, IMT 2000, FPLMTS • Networks to provide PCS • UMTS - ETSI effort • IMT 2000 (previously FPLMTS) - ITU effort • To provide global mobility & digital data services 10/29/2020 10
IN Architecture 10/29/2020 11
What is IN? • Separation of spec, creation & control of services from physical switching networks – Evolved from a world where the only service available was switching – Present from day 1 in IP 10/29/2020 12
AIN History • Idea of Stored Program Control – for ease of deploying services • • • IN/1 - 800 calling, call waiting IN/2 - additional services IN/1+ - simplification of IN/2 MVI (Multi-Vendor Interactions) AIN 10/29/2020 13
What does it define? • Technical capabilities for SS 7 components – SCP (Service Control Point) – SSP (Service Switching Point) – IP (Intelligent Peripheral) • Planes of abstraction 10/29/2020 14
TCP/IP • IN defines Points-In-Call (PICs) at SSPs – off-hook – digit-called – did not answer. . . • TCP (Trigger Check Point) for each PIC • FE (Functional Entity) at SCP/IP 10/29/2020 15
An Example AIN Service • Portable Speed Calling List • Dial *55, PIN, Speed Calling Number – How is it speedy ? • AIN switch causes a trigger • Sends message to SCP 10/29/2020 16
Example Service Continued. . . • SCP invokes SLP (Stored Logic Program) • SCP verified PIN • Completes call 10/29/2020 17
Feature Interaction • How do complicated features have unforeseen interactions? • Examples: – Universal Call Forwarding: paying toll – Voice mail ‘#’ sign? ? ? – OCP, TCP, CFU 10/29/2020 18
ICEBERG • In addition to PCS: – Network transparency across voice/data/paging networks – Service transformations (e. g. E 911) – Service handoff – User preference management (Universal Inbox) – Any-to-Any data transformations 10/29/2020 19
ICEBERG • Anyone can deploy services (flexible service infrastructure) • Motivation for IN: – “…rapidly engineer new revenue producing services, in response to market opportunities…. Ultimately, service creation, or at least service customization can be extended to subscribers” 10/29/2020 20
Discussion • Why did they hack away? • SS 7, UPT, IN -- are they still hacks? • “Billing and security aspects are studied in standardization bodies (ETSI and ITU), but work on these subjects is not very advanced because of the complexity involved for network operators to protect their interests” 10/29/2020 21
- Slides: 21