3GPP Presence Requirements Requirements for Presence Service based on 3GPP specifications and wirele

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3GPP Presence RequirementsRequirements for
Presence Service based on 3GPP specifications and
wireless environment characteristicsdraft-kiss-s
imple-presence-wireless-reqs-01Krisztián Kiss
Gábor Bajkó
IETF55, Atlanta, USA
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Changes on publishing reqs (compared to 00)

• Standardized publication mechanism
• adding elements to the presence information as
  well as remove or modify existing elements of the
  presence information
• Publishing from multiple PUAs
• merge the information and resolve conflicts
• discover and manipulate already existing elements
  of the presence information published by another
  PUAs
• Feedback
• feedback about the result of a publishing
  transaction for the principal to know that the
  published doument was successfully composed
• Efficient publishing of multimedia content (large
  size content)
• update only the information that has changed

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Changes on Subs and Not reqs

• Filtering
• watcher indicates rules for the information to be
  received (or not to be received)
• presence information is constructed based on
  filtering request and authorization rules
• PLS to construct and store appropriate filtering
  rules for URIs in the presencelist based on the
  watcher's filtering preferences
• Efficiency
• watcher to determine what presence information is
  available before fetching or subscribing to the
  presence information with values
• receiving multimedia content
• notification contains only the information that
  has changed status

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Further changes on reqs

• Presence Document
• Semantics to the content of communication mean
• voice, video, instant messaging, application
• Multivalue concept
• multiple instances of the semantically same
  presence information
• different instances contain different values to
  be shown for different watchers
• Authorization
• Multiple sources manage the rules from multiple
  sources. One source must be able to learn changes
  from other sources
• Presencelist
• creating presencelist, adding new URIs to an
  existing presencelist, modifying or removing
  existing URIs from an existing presencelist, or
  deleting a presencelist

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Background

• 3GPP specifications
• 3GPP Presence Stage 1 specification TS 22.141
• 3GPP Presence Stage 2 specification TS 23.141
• 3GPP Presence Stage 3 specification TR 24.841
• 3GPP Presence Work Item
• Stage 3 work is expected to be finished by June
  2003
• The document reflects opinions and comments from
  several delegates in the 3GPP CN1 WG