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TR-45 Standards Work on Enhanced 911

TR-45 Standards Work on Enhanced 911. GSC9/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

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  1. TR-45 Standards Work on Enhanced 911 GSC9/GRSC_027 Prepared by: David Crowe, Consultant to Qualcomm, David.Crowe@cnp-wireless.com Presented by: Cheryl Blum, Chair TIA TR-45

  2. 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 under development.

  3. J-STD-036 Reference Model

  4. 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).

  5. 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).

  6. 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. • Interim location may be provided during call setup to allow more accurate PSAP routing.

  7. 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.

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