Adaptive spotbeam broadcasting, systems, methods and devices for high bandwidth content distribution over satellite

• US 8,705,436 B2
• Filed: 01/31/2007
• Issued: 04/22/2014
• Est. Priority Date: 02/15/2006
• Status: Active Grant

• Current Assignee: ATC Technology Corporation (FedEx Corporation)
• Original Assignee: ATC Technology Corporation (FedEx Corporation)
• Inventors: Dutta, Santanu, Karabinis, Peter D.
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): VU, HOANG-CHUONG Q
• Application Number:
  US11/669,481
• Publication Number:
  US 20070192805A1
• Time in Patent Office: 2,638 Days
• Field of Search: 370/316, 370/326, 725/39, 725/56, 725/63, 725/64, 455/12.1, 455/427
• US Class Current: 370/326
• CPC Class Codes: H04B 7/18563 Arrangements for interconnecting multiple systems data switching networks H04L12/00
• CPC Class Codes: H04B 7/2041 Spot beam multiple access
• CPC Class Codes: H04H 20/22 Arrangements for broadcast of identical information via plural broadcast systems
• CPC Class Codes: H04H 20/74 of satellite networks
• CPC Class Codes: H04H 40/18 Arrangements characterised by circuits or components specially adapted for receiving

Abstract

Satellite broadcasting methods include providing a cellular satellite communications system configured to transmit information separately to a plurality of different geographic locations defined by a respective plurality of cellular satellite spotbeams, and concurrently transmitting a program signal on a plurality of different spotbeams. The plurality of different spotbeams may include less than a total number of spotbeams of the cellular satellite communications system. The plurality of different spotbeams may be selected adaptively from an available pool of spotbeams based on locations of users requesting the broadcast program signal. Corresponding satellite gateways, broadcast controllers and wireless user terminals are also provided.

Claims

1. A method of receiving information broadcast in a satellite spotbeam at a user terminal, comprising:

registering the user terminal in the satellite spotbeam;

receiving from a satellite associated with the satellite spotbeam intelligence about the information, wherein the intelligence identifies a start time, end time, time slot, frequency, spreading code or subchannel(s) associated with the information;

tuning a receiver in the user terminal to the time slot, frequency, spreading code or subchannel(s) identified in the intelligence;

receiving components of the information from an adjacent spotbeam and from an ancillary terrestrial component; and

combining at least one signal from the adjacent spotbeam with a signal from the ancillary terrestrial component.

2. A method of receiving information broadcast in a satellite spotbeam at a user terminal, comprising:

registering the user terminal in the satellite spotbeam;

receiving from a satellite associated with the satellite spotbeam intelligence about the information, wherein the intelligence identifies a start time, end time, time slot, frequency, spreading code or subchannel(s) associated with the information; and

tuning a receiver in the user terminal to the time slot, frequency, spreading code or subchannel(s) identified in the intelligence;

receiving components of the information from an adjacent spotbeam and from an ancillary terrestrial component; and

frequency translating the components, performing carrier, frame and/or symbol synchronization on the components, and combining the components.

3. The method of claim 2, further comprising determining a signal to noise power ratio of at least one of the components, wherein combining is performed in response to the at least one signal to noise power ratio.

4. A wireless user terminal for use in a cellular satellite communications system, the wireless user terminal comprising:

an antenna;

a transceiver coupled to the antenna and configured to communicate with the cellular satellite communications system via a satellite air interface over satellite communication frequencies, including satellite service link forward and reverse frequencies; and

a control circuit configured to;

register the user terminal in the satellite spotbeam;

receive from a satellite associated with the satellite spotbeam intelligence about the information, wherein the intelligence identifies a start time, end time, time slot, frequency, spreading code or subchannel(s) associated with the information;

tune the transceiver in the user terminal to the time slot, frequency, spreading code or subchannel(s) identified in the intelligence; and

receive components of the information from an adjacent spotbeam and from an ancillary terrestrial component;

combine at least one signal from the adjacent spotbeam with a signal from the ancillary terrestrial component.

5. A wireless user terminal for use in a cellular satellite communications system, the wireless user terminal comprising:

an antenna;

a transceiver coupled to the antenna and configured to communicate with the cellular satellite communications system via a satellite air interface over satellite communication frequencies, including satellite service link forward and reverse frequencies; and

a control circuit configured to;

register the user terminal in the satellite spotbeam;

receive from a satellite associated with the satellite spotbeam intelligence about the information, wherein the intelligence identifies a start time, end time, time slot, frequency, spreading code or subchannel(s) associated with the information;

tune the transceiver in the user terminal to the time slot, frequency, spreading code or subchannel(s) identified in the intelligence;

receive components of the information from an adjacent spotbeam and from an ancillary terrestrial component; and

frequency translate the components, to perform carrier, frame and/or symbol synchronization on the components, and to combine the components.

6. The wireless user terminal of claim 5, wherein the control circuit is further configured to determine a signal to noise power ratio of at least one of the components, wherein the control circuit is further configured to combine the components in response to the at least one signal to noise power ratio.