BEAM LIST DETERMINATION FOR RING ALERT IN A MOBILE SATELLITE SYSTEM
Original Publication Date: 1998-Sep-01
Included in the Prior Art Database: 2002-Jul-22
For a Mobile Satellite System (MSS) to operate, portable and mobile radio users must be notified of an incoming call. This is done using a ring alert sig- nal which is broadcast on various beams on various satellites that each of the radio users are listening to. This paper describes an approach for the calculation of the beams and satellites which should be used to ensure that the user will hear the ring alert message. This calculation is based upon the stored location area that the user is known to be operating in called a "Location Area Code" (LAC).