RSVP Admission Priority Policy Element for Emergency Services - - PowerPoint PPT Presentation

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RSVP Admission Priority Policy Element for Emergency Services - - PowerPoint PPT Presentation

Dec 25, 2023 495 likes •564 views

<draft-lefaucheur-emergency-rsvp-00.txt> RSVP Admission Priority Policy Element for Emergency Services Francois Le Faucheur - flefauch@cisco.com Francois Le Faucheur, James Polk C isco Systems (with impetus & input from An Nguyen,

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IETF 64 draft-lefaucheur-emergency-rsvp-00.txt

<draft-lefaucheur-emergency-rsvp-00.txt>

RSVP Admission Priority Policy Element for Emergency Services

Francois Le Faucheur - flefauch@cisco.com

Francois Le Faucheur, James Polk Cisco Systems (with impetus & input from An Nguyen, NCS)

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IETF 64 draft-lefaucheur-emergency-rsvp-00.txt

Background (1/2)

  • Emergency Telecommunications Service (GETS,

MLPP,…) key requirement:

– Guarantee superior probability of Call Completion from an authorized user in times of crisis

  • For some services this means network needs to

support a preemptive model

  • For some services this means network needs to

support an “admission priority” whereby some resources are set aside for emergency services

  • nly
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SLIDE 3

IETF 64 draft-lefaucheur-emergency-rsvp-00.txt

Background (2/2)

  • draft-ietf-tsvwg-mlpp-that-works “Implementing an

Emergency Telecommunications Service for Real Time Services in the Internet Protocol Suite” describes:

– call admission procedures allowing support of Emergency Telecommunications Service – how to use RSVP protocol suite for that purpose (and link with SIP) – How to use RSVP Preemption Priority Policy Element to support the preemptive model

  • draft-lefaucheur-emergency-rsvp specifies a “Admission

Priority Policy Element” to support admission priority

  • Similar concept to “<Admission Priority> Parameter

(ID=12)” of NSIS QSPEC

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SLIDE 4

IETF 64 draft-lefaucheur-emergency-rsvp-00.txt

Admission Priority Operations Example

Total Avail Bw Bw Avail for non-priority use Bw Avail for priority use Non-priority call Priority call New non-priority call REJECTED New priority call ACCEPTED

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IETF 64 draft-lefaucheur-emergency-rsvp-00.txt

Proposed Extension: New Policy Element (inside Policy Data object)

+-------------+-------------+-------------+-------------+ | Length (12) | P-Type = ADMISSION_PRI | +-------------+-------------+-------------+-------------+ | Flags | M. Strategy | Error Code | Reserved(0) | +-------------+-------------+-------------+-------------+ | Admission Priority | Reserved (0) | +---------------------------+---------------------------+

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IETF 64 draft-lefaucheur-emergency-rsvp-00.txt

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