| US 7,574,227 B1 | ||
| System and method for dispatch calling using personal telephone numbers | ||
| Steven Wesley Barrow, South Riding, Va. (US) | ||
| Assigned to Nextel Communcations Inc., Reston, Va. (US) | ||
| Filed on Jul. 29, 2005, as Appl. No. 11/192,076. | ||
| Claims priority of provisional application 60/611751, filed on Sep. 22, 2004. | ||
| Int. Cl. H04B 7/00 (2006.01) | ||
| U.S. Cl. 455—518 [455/519; 370/312; 370/432] | 6 Claims |
| 1. In an iDEN network, a method for dispatch calling using a personal telephone number (PTN), the method comprising the acts
of:
receiving a dispatch call request with the PTN;
determining which home location registers serve subscribers associated with a portion of the PTN;
querying the determined home location registers for an Urban, Fleet Member ID (UFMI);
completing the dispatch call using a UFMI received from one of the determined home location registers,
wherein the act of determining which home location registers serve subscribers associated with the portion of the PTN comprises
the acts of:
querying a recent call record cache and a visitor location record; and
performing a global title translation (GTT) lookup, based on the portion of the PTN, if the querying of the recent call record
cache and the visitor location record do not indicate which home location registers serve subscribers associated with the
portion of the PTN.
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