16-Jun-151 PCS in Telephony & Intelligent Network versus ICEBERG Bhaskaran Raman Network Reading Group Friday, Feb

16-Jun-152 Outline Personal Communication Services (PCS) in telephony IN architecture (very high level) Relation to ICEBERG

16-Jun-153 Personal Communication Services

16-Jun-154 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)

16-Jun-155 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

16-Jun-156 The Networks Fixed Networks (POTS) Cellular (e.g. GSM) Digital Cordless (e.g. DECT) Wireless data (e.g. GPRS) Satellite

16-Jun-157 PCS in Fixed Networks Call Screening Personal Numbering (Hotline) Profile Management Call Forwarding Automatic Callback

16-Jun-158 UPT Subscriber has personal number Billing and service profiles based on the personal number Service availability across different (fixed) networks

16-Jun-159 GSM Does not provide full PCS Handles terminal mobility well No complete integration with cordless SIM: provides another kind of mobility

16-Jun-1510 UMTS, IMT2000, FPLMTS Networks to provide PCS UMTS - ETSI effort IMT2000 (previously FPLMTS) - ITU effort To provide global mobility & digital data services

16-Jun-1511 IN Architecture

16-Jun-1512 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

16-Jun-1513 AIN History Idea of Stored Program Control –for ease of deploying services IN/ calling, call waiting IN/2 - additional services IN/1+ - simplification of IN/2 MVI (Multi-Vendor Interactions) AIN

16-Jun-1514 What does it define? Technical capabilities for SS7 components –SCP (Service Control Point) –SSP (Service Switching Point) –IP (Intelligent Peripheral) Planes of abstraction

16-Jun-1515 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

16-Jun-1516 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

16-Jun-1517 Example Service Continued... SCP invokes SLP (Stored Logic Program) SCP verified PIN Completes call

16-Jun-1518 Feature Interaction How do complicated features have unforeseen interactions? Examples: –Universal Call Forwarding: paying toll –Voice mail ‘#’ sign??? –OCP, TCP, CFU

16-Jun-1519 ICEBERG In addition to PCS: –Network transparency across voice/data/paging networks –Service transformations (e.g. E911) –Service handoff –User preference management (Universal Inbox) –Any-to-Any data transformations

16-Jun-1520 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”

16-Jun-1521 Discussion Why did they hack away? SS7, 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”