Tr 45 standards work on enhanced 911
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TR-45 Standards Work on Enhanced 911. GSC10/GRSC_027. Prepared by: David Crowe, Consultant to Qualcomm, [email protected] 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

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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, [email protected]

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.


J std 036 reference model

J-STD-036 Reference Model


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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