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ECRIT - Getting Certain URIs, and Alternatives to Getting Emergency Dialstring(s)

ECRIT - Getting Certain URIs, and Alternatives to Getting Emergency Dialstring(s). draft-polk-ecrit-lost-server-uri-00 draft-polk-dhc-ecrit-uri-psap-esrp-00 draft-polk-dhc-ecrit-uri-lost-00 draft-polk-ecrit-dhc-emergency-dialstring-option-00 draft-polk-ecrit-mapping-during-registration-00

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ECRIT - Getting Certain URIs, and Alternatives to Getting Emergency Dialstring(s)

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  1. ECRIT - Getting Certain URIs, and Alternatives to Getting Emergency Dialstring(s) draft-polk-ecrit-lost-server-uri-00 draft-polk-dhc-ecrit-uri-psap-esrp-00 draft-polk-dhc-ecrit-uri-lost-00 draft-polk-ecrit-dhc-emergency-dialstring-option-00 draft-polk-ecrit-mapping-during-registration-00 draft-polk-ecrit-emergency-dialstring-00 James Polk July 11, 2006

  2. OK, let’s get this over with, eh?

  3. What are these 6 IDs discussing? • How to get a (sometimes preferred) LoST Server, and/or PSAP/ESRP, URI(s) into an endsystem • How to get a (sometimes preferred) emergency dialstring(s) into an endsystem • No one ID discusses both

  4. Where are these mechanisms used? • Access Providers and Enterprises (of all sizes) *can* use DHCP for users to request and/or deliver URIs and Emergency Dialstrings • VSPs (which could be from a local network or Call processing on the other side of planet) will have SIP communications with endpoints, thus SIP UAs *can* request and/or deliver URIs and Emergency Dialstrings

  5. How are these Mechanisms used? • During Network Attachment time and/or periodic refresh, specific info *can* be requested for download, or just downloaded to endsystem • Instead of new protocols, all 6 IDs propose extensions to either DHCP or SIP, which are already a given in most, if not all endsystems

  6. LIS Server DHCP Server Attachment Time configuration • Alice sends DISCOVER message Alice • DHCP Server may interact with LIS Domain E Domain B • Alice receives (URI(s), and/or Dialstring(s) Domain A Domain D Domain F Domain C DHCP Server also Domain A draft-polk-dhc-ecrit-uri-lost-00 draft-polk-dhc-ecrit-uri-psap-esrp-00 draft-polk-ecrit-dhc-emergency-dialstring-option-00

  7. LIS Server Contacting a specific Server • Alice may attach here... Alice Domain E Domain B Domain A Domain D Registrar Server Domain F Domain C also Domain A

  8. LIS Server These may be access/core providers only, and not trusted by Alice or her org Contacting a specific Server Alice • ...or here • Either way, she may want – or need – to communicate here Domain E Domain B Domain A Domain D Registrar Server Domain F Domain C LIS Server also Domain A

  9. LIS Server Contacting a specific Server • Alice sends SIP REGISTER with Location Alice • Registrar Server may interact with LIS Domain E Domain B • Alice receives 200 OK w/ URI(s), and/or Dialstring(s) Domain A Domain D Registrar Server Domain F Domain C also Domain A draft-polk-ecrit-lost-server-uri-00 draft-polk-ecrit-mapping-during-registration-00 draft-polk-ecrit-emergency-dialstring-00

  10. LIS Server Contacting a specific Server Alice • Alice sends SIP REGISTER with Location • Registrar Server may interact with LIS Domain E Domain B • Alice receives 200 OK w/ URI(s), and/or Dialstring(s) Domain A Domain D Registrar Server Domain F Domain C LIS Server also Domain A draft-polk-ecrit-lost-server-uri-00 draft-polk-ecrit-mapping-during-registration-00 draft-polk-ecrit-emergency-dialstring-00

  11. DHCPOFFER (Options answered) DHCPACK (Options answered) DHCPDISCOVER (Options listed) DHCPREQUEST (Options listed) DHCP Messaging 101 Alice DHCP Server LIS Server • DHCP Clients query for configuration information • DHCP Clients update configuration information

  12. DHCPOFFER (Options answered) DHCPACK (Options answered) LoST transaction LoST Query DHCPDISCOVER (Options listed) DHCPREQUEST (Options listed) LoST Response DHCP Messaging including LIS Alice DHCP Server LIS Server • DHCP Clients query for configuration information • Could include Location or Location specific information • DHCP Clients update configuration information

  13. DHCPOFFER (Options answered) DHCPACK (Options answered) LoST transaction LoST Query DHCPDISCOVER (Options listed) DHCPREQUEST (Options listed) LoST Response DHCP Messaging including LIS Alice DHCP Server LIS Server • DHCP Clients query for configuration information • Could include Location or Location specific information • DHCP Clients update configuration information

  14. draft-polk-dhc-ecrit-uri-lost-00 • Specifies how an Access Network (SP, Enterprise, SMB, home) provides a LoST Server URI • By creating a new DHCP Option for the LoST server • May or may not involve a location resolution to return URI • Motivation: This is the easiest means of getting a LoST URI into a client • Open Issues – change filename to -ecrit-

  15. draft-polk-ecrit-dhc-emergency-dialstring-option-00 • Specifies how an Access Network (SP, Enterprise, SMB, home) provides a local or visited emergency dialstring • By creating a new DHCP Option for what is important, or required to be understood, on that network • May or may not involve a location resolution to return URI • Motivation: This is the easiest means of getting a LoST URI into a client • Open Issues – keep ISO country code?

  16. draft-polk-dhc-ecrit-uri-psap-esrp-00 • Specifies how an Access Network (SP, Enterprise, SMB, home) provides a PSAP/ESRP URI • By creating a new DHCP Option for the appropriate PSAP/ESRP • Means DHCP Server will have to implement LoST • Unless there is only one answer ever • Motivation: Local network may be in best position to provide this easy to deliver URI • Open Issues – change filename to -ecrit-

  17. 200 OK 200 OK SIP REGISTER SIP REGISTER (refresh) SIP Registration 101 Alice SIP Registrar LIS Server • SIP UAs Register within a Domain for a certain amount of time • Generally advisable to use TLS, thus this is secure communications anyway • UAs refresh registration periodically

  18. 200 OK (refreshed parameters) LoST transaction LoST Query 200 OK (with unique Loc parameters) SIP REGISTER (w/ PIDF-LO) SIP REGISTER (refresh) LoST Response SIP Registration including LIS Alice SIP Registrar LIS Server • SIP UAs Register within a Domain for a certain amount of time • Can include Location by-value or by-reference for unique parameters • Can include an option-tag requesting additional info sent back • UAs refresh registration periodically

  19. 200 OK (refreshed parameters) LoST transaction LoST Query 200 OK (with unique Loc parameters) SIP REGISTER (w/ PIDF-LO) SIP REGISTER (refresh) LoST Response SIP Registration including LIS Alice SIP Registrar LIS Server • SIP UAs Register within a Domain for a certain amount of time • Can include Location by-value or by-reference for unique parameters • Can include an option-tag requesting additional info sent back • UAs refresh registration periodically

  20. draft-polk-ecrit-lost-server-uri-00 • Specifies how an Application Provider (SP, Enterprise, SMB, home) provides a LoST Server URI • By creating a new SIP option-tag and header for the LoST server • Motivation: Application provider is the one often responsible for emergency calling results, but can’t be if it doesn’t give this answer • Open Issues – none

  21. draft-polk-ecrit-emergency-dialstring-00 • Specifies how an Application Provider (SP, Enterprise, SMB, home) provides a local or visited emergency dialstring • By creating a new SIP option-tag and header for what is important, or required to be understood, on that network when a user enters a locally significant dialstring • Motivation: SIP solution within existing TLS secure registration from a trusted server • Open Issues – change filename to -ecrit- • BNF needs to be corrected

  22. draft-polk-ecrit-mapping-during-registration-00 • Specifies how an Application Provider (SP, Enterprise, SMB, home) provides a PSAP/ESRP URI • By creating a new SIP option-tag and header for the appropriate PSAP/ESRP • Means SIP Registrar will have to implement LoST • Unless there is only one answer ever • Motivation: Application Provider has trusted servers (by contract), and may be bound to provide this URI • Open Issues – change filename to -ecrit-

  23. Open issues here • Listed under each ID’s slide • Asked by DHC chairs to move all related IDs over to ECRIT, resulting in two of these IDs getting new filenames very soon

  24. What’s Next? • Take comments how to improve each ID • Want several to become WG items • draft-polk-ecrit-lost-server-uri-00 • draft-polk-dhc-ecrit-uri-lost-00 • draft-polk-ecrit-dhc-emergency-dialstring-option-00 • draft-polk-ecrit-emergency-dialstring-00 • Willing to keep PSAP URI IDs individual for now, unless WG thinks otherwise is best

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