Motorola Corporation

James Morris Tooker

Michael Addison Miller

Dean Paul Vanden Heuvel

Brent M McKay

David Jesus Garcia

David Stephen Saewert

Jerry Shihkuo Tang

A method ( ) for parameterizing a predetermined geographic area ( ) serviced by a satellite communication system ( ) into a number of equally shaped sub-partitions ( ) is discloseed. The satellite communication system ( ) has a processor ( )for generating data elements and a memory ( ) for storing the data elements in data structure. The method ( ) includes the step ( ) of determining a total latitude side length dimension and a total longitude side length dimension of the predetermined geographic area ( ) from latitude and longitude values representative of the geographic area. The steps ( ) also include determining the area of a sub-partition based upon the total latitude side length, the total longitude side length, and the number of equally shaped sub-partitions. Each of the sub-partitions ( ) are substantially square and have the same area. The steps also include determining ( ) an actual side latitude dimension ( ) of the sub-partition ( ) and storing the side latitude dimension ( ) in the data structure, and determining ( ) an actual side longitude dimension ( ) of the sub-partition ( ) and storing the side longitude dimension ( ) in the data structure. The satellite communication system ( ) generates a grid from the actual side latitude dimension ( ) and the actual side longitude dimension ( ) and superimposes the grid over the predetermined geographic area ( ).

Method for rectangular parameterization of a geographic area using a geolocation algorithm

A subscriber unit (101) includes a SIM card reader (107) for receiving a SIM card (105). The subscriber unit (101) is serialized and has stored therein an alphanumeric signature value which is associated with the specific serialized subscriber unit (101). The subscriber unit (101) is fully operable only with a SIM card (105) having stored therein the specific signature value corresponding to the serialized subscriber unit (101). A user having a SIM card (105) containing the specific signature value for that subscriber unit can select a mode of user operation which will permit multiple selected SIM card holding users to use the subscriber unit.

SIM card secured subscriber unit

Multiple user SIM card secured subscriber unit

In a packet network, message packets (130) are comprised of vacant or unused bits for future system enhancements or for remedying unknown design oversights or utilizing vacant portions of fixed length data packets. Furthermore, message packets (130) comprise a message type identifier distinguishing message architecture. A transmit and receive packet network node (100) maintains an unused bit catalog (125) listing vacant or unused bits of particular message packet types. When a message packet type having vacant or unused bits is detected propagating through the packet network, background data is retrieved from a transmit background data queue (115) and interleaved into such message packets to form enriched message packets (130') for transportation through the packet network. Receiving packet network nodes (100) detect enriched message packets (130') and extract and buffer the background data. A lower data-rate background data transfer mechanism is maintained without impacting the performance of the existing packet network.

Method and system for overhead bandwidth recovery in a packetized network

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Phoenix, AZ, United States of America

James Morris Tooker