E911 Implementation for Automotive Application

Jeffrey Liu, Koji Hasegawa, Mikio Wakamori, Kousuke Ogawara, Matt Ronning, Luke Fay, Nobu Hayashi, Bill Osborn and David Duguid

Abstract:	A new class of wireless aided GPS requirements for CDMA and IDEN handsets has resulted from the FCC’s E911 mandate. This mandate requires wireless carriers such as Verizon, Sprint, and Nextel to support E911 calling from all mobile devices. Location of the caller needs to be known to the emergency service with 50 meters 2DRMS accuracy at least 67% of the time. Sony has modified the baseband signal processing of two generations of GPS IC’s to comply with this mandate. Software solutions for this mandate were developed for the CXD2932 and CXD2951 GPS devices that communicate with Sony Ericsson’s CM42 CDMA cellular phone module. This paper describes Sony’s solution as implemented in the CXD2932/51. Verification and test procedures are also presented, with descriptions of in-house test equipment and the Sony Ericsson phone modules. In addition to lab testing, performance results from field tests using the Verizon network are also presented and show a consistently high level of accuracy and availability, demonstrating the superior performance achieved.
Published in:	Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005) September 13 - 16, 2005 Long Beach Convention Center Long Beach, CA
Pages:	2944 - 2950
Cite this article:	Liu, Jeffrey, Hasegawa, Koji, Wakamori, Mikio, Ogawara, Kousuke, Ronning, Matt, Fay, Luke, Hayashi, Nobu, Osborn, Bill, Duguid, David, "E911 Implementation for Automotive Application," Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005), Long Beach, CA, September 2005, pp. 2944-2950.
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