The Telephone,
Internet,
and the
New Telecommunication Infrastructure

Michael J. Ferguson
Professor Emeritus
INRS-Télécommunications
Université de Québec
mjf_ferguson@yahoo.ca

April 9, 2003
Universidad de Chile

Contents

1  A Network Revolution?
    1.1  Some Driving Forces
    1.2  The Triggers
    1.3  Why is there such a mess in Telecommunications?
2  Some History - It always takes longer than you expect!
    2.1  Telephony
    2.2  Critical innovations for Telecommunication Networks
3  Computer Network Design (1970s)
4  Internet History and Architecture
    4.1  An Internet Historical Timeline
    4.2  Current InterNetwork Architecture
5  Access Network Technologies - connecting to the customer
    5.1  Ethernet: The Ubiquitous LAN
6  Basic IP Network Design Assumptions
7  Real Time Traffic
    7.1  What is Real Time Traffic?
    7.2  An evolving? Internet Architecture for Real Time Traffic
    7.3  IETF Working Groups Directly Concerned With Real Time Traffic
    7.4  IP Routing and Real Time Traffic
    7.5  Requirements for Real Time Flows On The Internet
    7.6  Real Time traffic on the Internet
    7.7  RTP - Real Time Protocol
    7.8  RSVP - Resource ReSerVation Protocol
    7.9  Differentiated Service (Diffserv)
8  Voice over IP - VoIP
    8.1  VoIP Standards
    8.2  Voice On The Current "Commodity" Internet
    8.3  Voice On A Corporate Intranet
    8.4  Voice On A Packet Switched Infrastructure (Packet Voice)
9  A Bottom Line - Internet Architecture for the New Infrastructure?
10  A Potential Architecture for the New Telecommunication Infrastructure
    10.1  IP based packet network communications infrastructure
    10.2  An Alternative?

1  A Network Revolution?

1.1  Some Driving Forces

1.2  The Triggers

1.3  Why is there such a mess in Telecommunications?

2  Some History - It always takes longer than you expect!

2.1  Telephony

2.2  Critical innovations for Telecommunication Networks

3  Computer Network Design (1970s)

4  Internet History and Architecture

4.1  An Internet Historical Timeline

4.2  Current InterNetwork Architecture

5  Access Network Technologies - connecting to the customer

5.1  Ethernet: The Ubiquitous LAN

6  Basic IP Network Design Assumptions

7  Real Time Traffic

7.1  What is Real Time Traffic?

7.2  An evolving? Internet Architecture for Real Time Traffic

7.3  IETF Working Groups Directly Concerned With Real Time Traffic

7.4  IP Routing and Real Time Traffic

7.5  Requirements for Real Time Flows On The Internet

7.6  Real Time traffic on the Internet

7.7  RTP - Real Time Protocol

7.8  RSVP - Resource ReSerVation Protocol

RSVP was supposed to be the protocol of choice to handle QoS, but it is now viewed as being unnecessarily complex, which has made it unappealing for the community at large and even its working group has disbanded.

7.9  Differentiated Service (Diffserv)

The key idea is to annotate IP packets with a small, easily read field, and have the Internet router/switches handle them differently. This appears to be a proposal that could, eventually and radically, change the basic communication infrastructure of the Internet. The diffserv working group is developing the rules that compliant IP routers/switches should/must follow:

8  Voice over IP - VoIP

8.1  VoIP Standards

"Define and promote implementation agreements for voice and voiceband data traffic over an IP network that ensures seamless product interoperability and a high quality of service" (Objective of the Voice over IP Forum of the International Multimedia Teleconferencing Consortium (IMTC) http://www.imtc.org)
Key Issues

8.2  Voice On The Current "Commodity" Internet

8.3  Voice On A Corporate Intranet

8.4  Voice On A Packet Switched Infrastructure (Packet Voice)

9  A Bottom Line - Internet Architecture for the New Infrastructure?

10  A Potential Architecture for the New Telecommunication Infrastructure

10.1  IP based packet network communications infrastructure

10.2  An Alternative?

Do we know how to do it ... not really!