Method and apparatus for call establishment in a satellite communication system
First Claim
1. In a subscriber unit that communicates within a communication system that includes at least one communication node, a method of accessing said communication system comprising the steps of:
- checking a validity of location data stored within said subscriber unit, said location data being valid for a validity period based on a mobility factor associated with said subscriber unit, said mobility factor including a maximum velocity said subscriber unit is capable of traveling;
when said location data is valid, sending an access request that includes said location data to said communication system; and
cooperating with said one communication node to establish a communication link between said subscriber unit and said one communication node after said location data is verified by said communication system.
4 Assignments
0 Petitions
Accused Products
Abstract
A subscriber unit (26) contains location data that expires after predetermined time periods that are based on the subscriber'"'"'s mobility. When the location data has not expired, the subscriber unit requests access (108) to a satellite communication system (10) by providing location data within an access request message. The communication system performs a quick check (214) to validate the location data. Accordingly, time-consuming geo-location procedures are avoided when a call is initiated or being received. When the location data has expired, the subscriber unit requests access (110) without providing location data within the access request message. The communication system performs a complete geolocation procedure (210) to determine valid location data for the subscriber unit. The location data is sent (211) to the subscriber unit and time stamped (113).
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Citations
22 Claims
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1. In a subscriber unit that communicates within a communication system that includes at least one communication node, a method of accessing said communication system comprising the steps of:
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checking a validity of location data stored within said subscriber unit, said location data being valid for a validity period based on a mobility factor associated with said subscriber unit, said mobility factor including a maximum velocity said subscriber unit is capable of traveling; when said location data is valid, sending an access request that includes said location data to said communication system; and cooperating with said one communication node to establish a communication link between said subscriber unit and said one communication node after said location data is verified by said communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a gateway for use in a communication system that has at least one communication node in communication with said gateway, a method of operating said gateway comprising the steps of:
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receiving an access request from a subscriber unit, said request including location data for subscriber unit, said subscriber unit having a mobility factor associated therewith, said mobility, factor based on a maximum velocity said subscriber unit is capable of traveling; validating said location data, said location data being valid for a validity period based on said mobility factor; when said location data is valid, allowing said subscriber unit access to said communication system; and when said location data is not valid, performing a location determining procedure to acquire valid location data for said subscriber unit. - View Dependent Claims (11, 12, 13)
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14. A subscriber unit for operating in a communication system having at least one communication node comprising:
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a memory for storing location data; a processor for checking validity of said location data, said location data being valid for a validity period based on a mobility factor associated with said subscriber unit, said mobility factor including a maximum velocity said subscriber unit is capable of traveling; and a transceiver for sending an access request to said communication system, said access request including said location data when said location data is valid, said transceiver for cooperating with said one communication node to establish a communication link between said subscriber unit and said one communication node. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification