ServiceListBoundary LoST Extension

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ServiceListBoundary(LoST Extension)

• draft-wolf-ecrit-lost-servicelistboundary-00
• ECRIT Interim Meeting
• Feb. 26, 2009
• Karl Heinz Wolf ltkarlheinz.wolf _at_ nic.atgt

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Problem Statement

• ltlistServicesByLocationgt provides a list of all
  services for a location
• Problem The area for which that service list is
  valid is unknown
• When to perform a new ltlistServicesByLocationgt?
  Every time client moves?
• Similar problem with ltfindServicegt, solved by
  serviceBoundary area, for which a mapping of a
  particular service is valid for
• Proposed Solution serviceListBoundary

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Use Case
ServiceList urnservicesos.ambulance
Mountain Rescue Service Boundary
moves
Location A
Ambulance Service Boundary
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Use Case
ServiceList urnservicesos.ambulance urnservice
sos.mountainrescue
Mountain Rescue Service Boundary
Location B
Location A
Ambulance Service Boundary
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Proposal serviceListBoundary

• Indicates a region within which all
  ltlistServicesByLocationgt queries result in the
  same service list
• Ensures that a client never misses a change of
  available services
• ServiceListBoundary is independent of the
  serviceBoundary
• Server can apply GIS set theory to calculate it
  based on serviceBoundaries
• Integration into LoST similar to serviceBoundary

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Example
The Service List Boundary
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Example

• ltlistServicesByLocationResponsegt
• ltServiceListgt urnservicesos.ambulance
  lt/ServiceListgt
• ltserviceListBoundarygt
• ltcivicAddressgt
• ltcountrygtATlt/countrygt
• ltA1gtViennalt/A1gt
• lt/civicAddressgt
• lt/serviceListBoundarygt

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Next Steps

• Questions?
• This is closing a gap in LoST does the group
  want to adopt this document?
• karlheinz.wolf _at_ nic.at