Motorola Corporation

William Robert Worger

Bradley Robert Schaefer

Peter J Armbruster

Gerald V Piosenka

Craig Allen Long

Mark L Shaughnessy

Nandakishore A Albal

Thomas G Hallin

George Xenakis

Steven D Upp

Ernest Earl Woodward

James P Redden

David Michael Harrison

Brent M McKay

Steven Peter Allen

William N Shores

Derek Alan Oxley

Ronald V Chandos

Gerald James Hogg

Michael A Savage

James Edward Greenwood, Jr

Carl A Grube

Roman Casimir Lopatynski

The voice signaling gateway () converts signaling and bearer traffic information between iDEN network () and various other networks (). The voice signaling gateway includes a signaling portion () and a bearer traffic portion (). The voice signaling gateway interfaces with any networks which support session initiation protocol (SIP). Further, the voice signaling gateway is capable of. interworking with both 3G and 2G type networks.

Method and apparatus for interworking dispatch services network

An arrangement for compressing () and uncompressing () system set up messages between a client and a server employing Session Initiation Protocol transmits a template () between client () and server (). A template is pre-placed () by clients or servers with other clients or servers. During execution time when a client requests services by connecting to a server only a minimal template () is transmitted from client to server. The server then reconstructs () the original uncompressed message.

Session initiation protocol compression

The voice signaling gateway () provides group call and call back services among iDEN network () users () and a number of other various networks () users (). The voice signaling gateway has packet data interface () and web interface () In an alternate embodiment of the invention, an integrated applications server () is added to the voice signaling gateway () to provide group call services. The integrated applications server has the functions for supporting group calls which were within the voice signaling gateway () and forms a stand-alone special feature system.

Method and apparatus for group call services

A plurality of orbiting satellites ( ), each comprised of an onboard computer ( ). Each of the orbiting satellites and a plurality of ground-based computers ( ) are utilized to perform delay-insensitive functions associated with the orbiting satellites. An ubiquitous data link ( ) is maintained between each satellite and one or more of the ground-based computers. The integrated system is configured to allow a satellite to generate a remote procedure call (RPC), transmit the RPC to a ground-based computer, whereupon the ground-based computer processes the RPC and transmits a response back to the satellite. Delay-sensitive tasks and functions are performed by the computer onboard the satellite; delay-insensitive tasks are advantageously performed by the ground-based computer assets.

Methods and apparatus for using ground based processing resources to support orbiting satellites

A method (,, FIG.,) controls CU (,, FIGS.,) hand-off in a non-geostationary orbit (NSGO) satellite system (,, FIG.,) without consuming large amounts of bandwidth or satellite processing power. Using method (,), a network control facility (NCF) (,, FIGS.,) divides the earth (,, FIG.,) into suitable regions,(FIG.,), or geographical areas of the earth sized so that all of the CUs (,, FIG.,) within a region (,) can be handed-off as a group rather than handling each station individually. When it is determined through the method (,) that it is time to hand-off communications in a particular region, all CUs within that region are directed to effectuate a hand-off at substantially the same time.

Method and apparatus for region based hand-offs in a satellite communication system

A secure communication hub (,) relays local communications between low probability of intercept (LPI) user radio equipment (,) and provides a secure interface with a command center (,) through a non-geostationary commercial satellite communication system. The secure communication hub (,) includes different radio interface units (,) for communicating different data formats with the (LPI) user radio equipment (,). Encryption and decryption circuitry (,) provides for different security levels and different keys for the (LPI) user radio equipment. Links with the satellite system are secured using encryption.

Secure communication hub and method of secure data communication

A message processing center (,) is used in a global message delivery system. Message processing center (,) uses at least one GEO satellite (,) and at least one Non-GEO satellite (,) to delivers messages (pages) to a number of ground stations (,) located at various locations on the surface of the earth. Message processing center (,) determines loading for at least one GEO satellite (,) and at least one Non-GEO satellite (,). Message processing center (,) determines available capacity for at least one GEO satellite (,) and at least one Non-GEO satellite (,). Message processing center (,) uses a number of criteria to optimize the delivery of the message data.

Global message delivery system and method using GEO and Non-GEO satellites

A communication system (,) has multiple satellites (,) communicating with ground stations (,) and with base stations (,). The satellites (,) are in non-geosynchronous orbit around the earth (,). A first ground station (,) transmits a data packet to a satellite (,). The data packet includes a sector number which represents an area on the earth (,) where the destination ground station (,) is located. The satellite (,) transmits the data packet to another satellite (,) if the satellite (,) is not serving an area identified by the sector number. This step is repeated until the data packet reaches a most likely satellite (,) that is most likely to be serving the area identified by the sector number. The most likely satellite (,) transmits the data packet to the destination ground station (,) if it is still serving the area identified by the sector number.

Method for sector-based routing

Equipment (10, 20) for facilitating point-to-point cryptographic data communication systems is disclosed. The seamless rekey cryptosystem permits changing of the crypto key (70, 80) with no down time. The cryptosystem will facilitate seamless key installation to eliminate data loss or reduce storage required while updating the crypto key. The seamless key will allow changing the key more often, which will also provide a more robust, secure cryptosystem.

Method and apparatus for seamless crypto rekey system

Working assets (26) are equipped with ID tags (56) that respond to interrogations from interrogators (50). Each interrogated tag (56) sends response codes that identify the tag (56) and working asset (26), can describe an amount of use experienced by the working asset (26), and can describe unused capacity available for holding a consumable commodity, such as fuel. Interrogators (50) are positioned at normally closed portals (40, 42, 62, 64) of staging areas (22, 24). A database (94) contains information concerning working assets (26), users (28) to whom working assets (26) have been assigned, and caretakers (38) who may be authorized to transport various working assets (26). The caretakers (38) also have ID tags (58). A portal (40, 42, 62, 64) temporarily opens or remains closed in response to the interrogation that takes place at the portal (40, 42, 62, 64) and data stored in the database (94).

Working asset management system and method

A fast pattern correlator and method comprising received bitstream data blocks split into estimation blocks and correlation blocks. Correlation blocks are extracted and compared to an expected pattern using a correlation part starting location estimator and correlator. The number of bit errors resulting is compared to a predetermined maximum in a threshold comparator. Extracting the correlation blocks includes indexing consecutive estimation blocks using an estimation part correlation table and predicting consistent correlation block starting locations. The correlation blocks are correlated with the expected pattern to produce an exclusive-OR result, which, used with a bit-error table, can be used to find a number of bit errors in the correlation.

Fast pattern correlator and method

A data locking system which modifies data in accordance with a renewable key variable derived from the exclusive ORing of a pseudorandom combination number from an external source means with an altered key variable.

Electronic keying scheme for locking data

An operational function checking method and device for a microprocessor, which uses four circuits to verify that a microprocessor and processing system are operating properly.

Growing community of inventors

Gilbert, AZ, United States of America

William Robert Worger