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TR-45 Standards Work on Enhanced 911. GSC10/GRSC_027. Prepared by: David Crowe, Consultant to Qualcomm, David.Crowe@cnp-wireless.com Presented by: Cheryl Blum, Chair TIA TR-45. E911 History. The US FCC released a ‘Report and Order’ in 1996 (94–102) to provide:

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tr 45 standards work on enhanced 911
TR-45 Standards Work on Enhanced 911

GSC10/GRSC_027

Prepared by: David Crowe, Consultant to Qualcomm, David.Crowe@cnp-wireless.com

Presented by: Cheryl Blum, Chair TIA TR-45

e911 history
E911 History
  • The US FCC released a ‘Report and Order’ in 1996 (94–102) to provide:
    • a callback number and cell/sector identification (‘Phase I’).
    • more accurate location (‘Phase II’).
  • This was revised in 1999 and allowed handset-based location technologies.
  • The TIA developed J-STD-034 with ATIS to address Phase I in 1997.
  • J-STD-036 was first published in 2000 to address Phase II. Revision B is now in press.
callback
Callback
  • Providing the telephone number of the emergency caller allows calls to be made back after the emergency call (e.g., to obtain more information).
  • A pseudo-callback number is provided for non-subscribers, based on the ESN, IMEI or MEID. It allows identification of the caller, but not callback.
  • Callback uses standard inter-system call delivery (e.g., based on TIA-41).
cell sector identification
Cell/Sector Identification
  • Identifies the cell from which an emergency call was made.
  • Provides crude location.
  • Helps route to the correct PSAP.
  • May be transmitted directly as an ESRD, or indirectly via an ESRK (followed by a database lookup).
accurate location
Accurate Location
  • Network based solutions must provide 100 meter accuracy 67% of the time, 300 meters 95% of the time.
  • Handset based solutions must provide 50 meter accuracy 67% of the time, 150 meters 95% of the time.
  • Location (as lat/long) is usually provided after initial call setup.
j std 036 revision b
J-STD-036 Revision B
  • Joint effort between TIA TR-45.2 and ATIS WTSC (formerly T1P1).
  • Extends ‘interim location’ to GSM/UMTS. Also supports CDMA.
  • Interim location is used to provide more accurate PSAP selection, reducing misrouted calls.
  • Supports ‘uninitialized’ mobiles with MEID (CDMA replacement for ESN, based on IMEI).
summary
Summary
  • TIA/ATIS J-STD-034 supports the US FCC Phase I Enhanced Wireless 911 mandate.
  • TIA/ATIS J-STD-036 supports the US FCC Phase II mandate, along with emerging wireless carrier/emergency call taker requirements.
  • All major public wireless technologies used in the USA are supported.
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