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VoIP Emergency Calling Support

An SAIC Company. VoIP Emergency Calling Support. Provided to support discussions in the NENA VoIP Migratory WG March 23, 2004. Telcordia Contacts: Nadine Abbott (732) 758-5257 nabbott@telcordia.com Theresa Reese (732) 758-5244 treese@telcordia.com Anand Akundi (732) 758-4304

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VoIP Emergency Calling Support

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  1. An SAIC Company VoIP Emergency Calling Support Provided to support discussions in the NENA VoIP Migratory WG March 23, 2004 Telcordia Contacts:Nadine Abbott (732) 758-5257 nabbott@telcordia.com Theresa Reese (732) 758-5244 treese@telcordia.com Anand Akundi (732) 758-4304 Aakundi@telcordia.com

  2. DHCP LGS LIS SRDB MSAG ALI DB Population of Routing Location Databases for VoIP MSAG is populated with routing addresses (e.g., sos@us.st.ESRN) for each ESZ/ESN. Location Gateway Server (LGS) is configured with ESRN to ESQK mappings for each ESN it serves. SRDB is populated with ESQK to ESN/PSAP mappings. ALI DB is populated with ESQK to LGS mappings. Emergency Services Provider Network VoIP domain Call server PSAP E9-1-1 Selective Router User Agent/ IP device ESGW ESQK  ESN ESQK<=>LGS ESZESRN{ESQKs} ESNESRN DBMS ESQK = Emergency Services Query Key (associated with LGS & PSAP) ESRN = Emergency Services Routing Number/Information (non-dialable), e.g., npa911xxxx or npa511xxxx.

  3. DHCP LGS LIS SRDB MSAG ALI DB VoIP Location Validation VoIP Location Information Server (LIS) requests validation of location objects against MSAG and obtains routing information for the associated Emergency Services Gateway (ESGW)/PSAP. Emergency Services Provider Network VoIP domain Call server E9-1-1 Selective Router PSAP ESGW User Agent/ IP device 1. Location validation request (LO) 2. LO1 4. Location validation response (us.st.ESRN) 3. us.st.ESRN DBMS LO = geographic or civil location object ESRN = Emergency Services Routing Number/Information (non-dialable), e.g., npa911xxxx, for routing to ESGW (and to identify PSAP) ESGW = Emergency Services Gateway

  4. DHCP LGS LIS SRDB MSAG ALI DB User Agent populated with VoIP Location One example of DHCP assisted download of Location Object to User Agent/IP device. Includes routing information to get to ESGW for appropriate Selective Router/PSAP. Emergency Services Provider Network VoIP domain 2. Stores LO & sos@us.st.ESRN Call server E9-1-1 Selective Router PSAP ESGW User Agent/ IP device 1. LO and sos@us.st.ESRN DBMS DHCP = Dynamic Host Configuration Protocol server LIS = Location Information Server LO = geographic or civil location object

  5. LGS LIS SRDB ALI DB VoIP Emergency Call See notes page. VoIP domain(s) Emergency Services Provider Network Call server 2. VoIP Call Setup (sos@us.st.ESRN, tel.url*, LO) E9-1-1 Selective Router 1. VoIP Call Setup (sos@us.st.ESRN, client ID, LO) 5. Call Setup (Cd=ESRN, Cg=ESQK) PSAP ESGW 6. ESQK UA or IP device 3. CBN*, LO, ESRN, VoIP Provider ID(s) or History 7. ESQK 4. ESQK 10. CBN, LO, VoIP Provider ID(s) or History? 8. ESQK 9. CBN, LO, VoIP Provider ID(s) or History? * Call server & ESGW must map “client ID” to a valid Call Back Number ESGW = Emergency Services Gateway (signaling and media) LGS = Location Gateway Server ESQK = Emergency Services Query Key

  6. LGS LIS SRDB ALI DB Alternative Scenario: VoIP Emergency Calls with LIS Assist to Obtain LO & Routing Includes query to LIS for LO and routing information. See notes page. VoIP domain(s) Emergency Services Provider Network Call server 4. VoIP Call Setup (sos@us.st.ESRN, tel.url*, LO) E9-1-1 Selective Router 1. VoIP Call Setup (sos@domain, client ID, LIS ID) 7. Call Setup (Cd=ESRN, Cg=ESQK) PSAP ESGW 8. ESQK UA or IP device 5. CBN*, LO, ESRN, , VoIP Provider ID(s) or History 9. ESQK 6. ESQK 3. Response (LO, sos@us.st. ESRN) 2. Query (client ID) 12. CBN, LO, VoIP Provider ID(s) or History? 10. ESQK 11. CBN, LO, VoIP Provider ID(s) or History? * Call server & ESGW must map “client ID” to a valid Call Back Number ESGW = Emergency Services Gateway (signaling and media) LGS = Location Gateway Server ESQK = Emergency Services Query Key

  7. DHCP LIS SRDB MSAG ALI DB VoIP Location Validation & CBN Updates VoIP Location Information Server (LIS) requests validation of location objects against MSAG and obtains routing information for the associated Emergency Services Gateway (ESGW)/PSAP. LIS sends location updates for local CBNs. Emergency Services Provider Network VoIP domain Call server E9-1-1 Selective Router PSAP ESGW User Agent/ IP device 8.CBN, ESN 7.CBN, ESN 1. Loc. Valid. request (LO) 2.LO1 4. Loc. valid. resp. (us.st.ESRN) 5. Location updates (CBN, LO) 3. us.st.ESRN 6. Loc. update. resp. (success) DBMS CBN = Call Back Number LO = geographic or civil location object ESRN = Emergency Services Routing Number/Information (non-dialable), e.g., npa911xxxx, for routing to ESGW (and to identify PSAP)

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