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Tapping the television cable

M Clarke1, A Findlay, J F Canac

  • 1Brunel University, Uxbridge, UK. malcolm.clarke@brunel.ac.uk

Journal of Telemedicine and Telecare
|January 1, 1996
PubMed
Summary

Doctors can now access patient data remotely using cable TV networks, creating a metropolitan-scale local area network (LAN). This novel solution offers speeds over 500 kbaud, improving clinical decision-making and remote access capabilities.

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Area of Science:

  • Medical Informatics
  • Computer Networking
  • Telecommunications

Background:

  • Immediate patient data access is crucial for clinical decision-making.
  • Current remote access solutions (modems, radio networks) are slow (2-10 kbaud).
  • Doctors lack remote access to clinical databases.

Purpose of the Study:

  • To propose and evaluate a novel solution for remote access to clinical databases.
  • To leverage existing cable television infrastructure for high-speed data networking.
  • To establish a metropolitan-scale local area network (LAN) for healthcare professionals.

Main Methods:

  • Utilized RF modems to transmit data on reverse (16 MHz) and forward (178 MHz) channels over cable TV networks.
  • Implemented a modified CSMA/CD protocol for network access, treating the cable as a multiple access network.
  • Developed a standard PC card modem with NDIS driver supporting Novell and TCP/IP.

Main Results:

  • Achieved data transmission speeds exceeding 500 kbaud, significantly faster than traditional methods.
  • Successfully piloted the HomeWorker network, demonstrating feasibility and performance.
  • Identified and addressed security and access control issues for sensitive patient data.

Conclusions:

  • Cable TV networks can be effectively repurposed as high-speed metropolitan-scale LANs.
  • The proposed system enhances remote access to patient data, supporting clinical practice.
  • Further research is needed on network security and impact on working practices.

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