| US 7,463,880 B2 | ||
| E911 behavior with GSRM in a wireless communication device | ||
| Murali Krishna Bandaru, San Diego, Calif. (US) | ||
| Assigned to Kyocera Wireless Corp., San Diego, Calif. (US) | ||
| Filed on Jan. 13, 2006, as Appl. No. 11/332,543. | ||
| Prior Publication US 2007/0167146 A1, Jul. 19, 2007 | ||
| Int. Cl. H04Q 7/22 (2006.01); H04Q 7/38 (2006.01) | ||
| U.S. Cl. 455—414.1 [455/422.1; 455/435.2; 455/439; 455/458; 455/461; 370/329; 370/338; 370/341] | 14 Claims |
| 1. A method for originating an emergency call on a wireless communication device, comprising the steps of:
(a) attempting to originate an emergency call on a first system;
(b) receiving a global service redirection message (GSRM) from the first system, the GSRM comprising a return if failure (RIF)
flag and a redirect list of alternate systems;
(c) scanning the redirect list for available alternate systems;
(d) if the alternate systems of the redirect list are not available, then attempting to originate the emergency call on the
first system;
(e) if the first system is not available, then attempting to originate the emergency call on an E911 list systems;
(f) if the E911 list systems are not available, then attempting to originate the emergency call on the first system;
(g) if the first system is not available, then entering an emergency silent redial scan mode to continue attempting origination
on the first system if RIF is set to true; and
(h) if the first system is not available, then repeating steps (b) through (g) if RIF is set to false.
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