Paper review: < Integrated Services in the Internet Architecture: an Overview [BCS94] >

Reviewer: <Ryan Gehl>

  1. State the problem the paper is trying to solve.
  2. The purpose of this paper (memo) is to discuss the proposed extension of the Internet architecture and protocols to provide integrated services (support for real-time and non-real-time services of IP).

  3. State the main contribution of the paper: solving a new problem, proposing a new algorithm, or presenting a new evaluation (analysis). If a new problem, why was the problem important? Is the problem still important today? Will the problem be important tomorrow?  If a new algorithm or new evaluation (analysis), what are the improvements over previous algorithms or evaluations? How do they come up with the new algorithm or evaluation? 
  4. The main contribution of this memo is to present an overview of the elements necessary to extend the Internet architecture to support integrated services.

  5. Summarize the (at most) 3 key main ideas (each in 1 sentence.) 
  6. (1) Real-time applications often do not work well across the Internet because of variable queueing delays and congestion losses.
    (2) The real-time QoS infrastructure required for real-time applications must be designed from the beginning for multicastinging; simply generalizing from the unicast (point-to-point) case does not work.
    (3) The proposed architectural extension is comprised of two elements: (1) an extended service model (IS model), which defines the externally visible behavior, and (2) a reference implementation framework.

  7. Critique the main contribution
  8. What lessons should researchers and builders take away from this work. What (if any) questions does this work leave open?

One lesson researchers should take away from this work is that one doesn't need to start entirely from scratch when building additional functionality into a system.