Definition and evaluation of the data-link layer of PACnet

Yasser H. Alsafadi, Ralph Martinez, William H Sanders

Research output: Chapter in Book/Report/Conference proceedingConference contribution


PACnet is a 200-500 Mbps dual-ring fiber optic network designed to implement a Picture Archiving and Communication System (PACS), in a hospital environment. The network consists of three channels: an image transfer channel, a command and control channel and a real-time data channel. An initial network interface unit (NIU) design for PACnet consisted of a functional description of the protocols and NIU major components. In order to develop a demonstration prototype, additional definition of protocol algorithms of each channel is necessary. Using the International Organization for standards/Open Systems Interconnection (ISO/OSI) reference model as a guide, we extend the definition of the data link layer. This definition covers interface service specifications for the two constitutent sublayers: logical link control (LLC) and medium access control (MAC). Furthermore, it describes procedures for data transfer, mechanisms of error detection and fault recovery.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Number of pages12
ISBN (Print)0819405418
StatePublished - 1991
Externally publishedYes
EventMedical Imaging V: PACS Design and Evaluation - San Jose, CA, USA
Duration: Feb 26 1991Mar 1 1991


OtherMedical Imaging V: PACS Design and Evaluation
CitySan Jose, CA, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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