Vt Idirect, Inc.

Idirect Incorporated

Venugopal Eyyunni

Conor Foley

Christopher Donald Gregory

Jason B Maiorana

Joseph Jude Boone

Hao Cheng

David B S Edsberg

David D Bettinger

Sang Ho Go

A communication system includes a hub, a repeater, and a remote. The hub is configured to adjust a transmission power of the remote depending on an external condition based on (i) a measured carrier-to-noise ratio CNof data transmitted from the hub to the repeater and back to the hub using a first signal, (ii) a measured carrier-to-noise ratio CNof data transmitted from the remote to the hub via the repeater using a second signal, (iii) a predetermined carrier-to-noise ratio CNof data transmitted from the hub to the repeater and back to the hub using the first signal under a clear sky condition, and (iv) a predetermined carrier-to-noise ratio CNof data transmitted from a reference remote to the repeater and back to the hub using the second signal under a clear sky condition.

Adjusting transmission power under changing conditions

A satellite communication system includes a hub, a repeater, a scheduling unit, and a remote. The scheduling unit is configured to synchronize a communication of the system based on an elapsed time between (i) an arrival at the remote of a downstream reference frame transmitted by the hub and retransmitted by the repeater, and (ii) an arrival at the remote of an upstream frame transmitted by the remote and retransmitted by the repeater.

Apparatus, system, and computer program for synchronizing communications

A remote, a communications system, and a method in which the remote communicates with another remote via a repeater and also communicates with a hub. The remote includes a transceiver configured to receive a signal from the another remote, a measuring unit configured to measure a first offset, and a calculation unit configured to calculate a frequency offset for the signal based on (i) the first offset measured at the measuring unit, and (ii) a second offset measured at the hub.

Method to eliminate frequency offset introduced in a network

A communication method for a communication network includes transmitting first control information for a first frame from a hub to a plurality of user nodes, and receiving first data bursts in the first frame from first and second user nodes according to the first control information. A start of the first frame from the first and second user nodes occurs simultaneously at the hub. The method also includes transmitting second control information, based on demand information received from the first and second nodes, for a second frame from the hub after transmitting the first control information, receiving second data bursts in the second frame according to the second control information, and receiving the second frame at the hub following the first frame.

Method, apparatus, and system for transmitting control information in a communication network

A demand assignment method for a communication network including a hub and a plurality of user nodes includes adding a demand field to each data burst from a user node. Further, the method includes transmitting a first and second frame with first and second burst time plans from the hub to each user node, and transmitting a first and second respective data burst and demand field from each of the user nodes to the hub according to the first and second control information. The first data burst from each user node arrives simultaneously at the hub, and the second data burst from each user node arrives simultaneously at the hub. Further, the second data burst from each user node arrives immediately following the arrival of the first data burst from each user node.

Method, apparatus, and system for demand assignment in a communication network

A communication network control method for a communication network including a hub and a plurality of user nodes includes adjusting system parameters to maximize communication data rate and minimize bit error rate given current conditions of the wireless channel, current loading of the network, and user constraints. In particular, the method includes transmitting a first and second frame with first and second control information from the hub to each user node, and transmitting a first and second respective data burst from each of the user nodes to the hub according to the first and second control information. The first data burst from each user node arrives simultaneously at the hub, and the second data burst from each user node arrives simultaneously at the hub. Further, the second data burst from each user node arrives immediately following the arrival of the first data burst from each user node.

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Centreville, VA, United States of America

Venugopal Eyyunni