METHOD FOR MINIMIZING SUBSCRIBER ROAMING DURING MASTER SITE FAILURE
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-17
Today's multi-site, multi-zone ASTRO systems use a number of techniques to ensure that subscribers remain in wide area coverage whenever possible. When a site enters site trunking mode, the subscribers registered to that site try to find another site that is in wide area mode. If the site enters site trunking mode because of a Zone Controller failure, all of the sites will be in site trunking mode, but the subscribers will still roam. After the system returns to wide area mode, the subscriber registration information has to be reconciled, which delays the return of full system service availability.