1-800-CALL-H.E.P. -- Experiences on a voice-over-IP test bed

Technical Report · Thu Feb 17 04:00:00 EST 2000

DOI:https://doi.org/10.2172/753303· OSTI ID:753303

Matthews, W ^[1]

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1. SLAC

Highly interactive Internet applications such as Voice-over-IP are extremely sensitive to network performance. Even on high performance research networks, many cases will require the use of differentiated services to achieve high (toll) quality conversations. In this talk the authors will describe a test bed over the Energy Sciences network (ESnet) between Lawrence Berkeley National Laboratory (LBNL), Stanford Linear Accelerator Center (SLAC), Argonne National Laboratory (ANL) and Sandia National Laboratory (Sandia). In particular the characteristics of Voice-over-IP calls between LBNL and SLAC will be reviewed and the effect of low, moderate and high congestion on the link will be quantified. The use of Per Hop Behavior (PHB) in IP headers with Weighted Fair Queuing (WFQ) in routers and the benefit they provide will be explained. A model of flows and performance will be presented and new techniques to predict the quality of calls are under development and will be reviewed. Comparisons with telephone reliability will be discussed and the feasibility of wide spread deployment of VoIP in HEP will be considered.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 753303
• Report Number(s): SLAC-PUB-8384
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
99 GENERAL AND MISCELLANEOUS
ANL
COMMUNICATIONS
HIGH ENERGY PHYSICS
INTERNET
LAWRENCE BERKELEY LABORATORY
PERFORMANCE
SANDIA NATIONAL LABORATORIES
STANFORD LINEAR ACCELERATOR CENTER