Method of maximizing use of bandwidth for communicating with mobile platforms

• US 7,187,690 B2
• Filed: 05/20/2002
• Issued: 03/06/2007
• Est. Priority Date: 05/20/2002
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Taylor, Scott A.
• Primary Examiner(s): Kizou; Hassan
• Assistant Examiner(s): Chou; Albert T.
• Application Number:
  US10/151,530
• Publication Number:
  US 20030214966A1
• Time in Patent Office: 1,751 Days
• Field of Search: 455/435, 455/188.1, 455/430, 455/431, 370/316, 725/75
• US Class Current: 370/432
• CPC Class Codes: H04B 7/18508 with satellite system used as relay, i.e. aeronautical mobile satellite service

Abstract

A system and method for switching between transmission modes provides more efficient use of available bandwidth. A content delivery system determines, based upon a predetermined limit, whether to broadcast content to a plurality of mobile platforms or unicast the data content via a point-to-point communication link. Acknowledgment signals from the mobile platforms are used to determine if the predetermined limit has been exceeded. A specific number or percentage defines the predetermined limit within a specified time period. The number of acknowledgment signals received is compared to the limit to determine if an exceedance condition has occurred.

Claims

1. A method of maximizing bandwidth use in communications between a base station and a plurality of mobile platforms, the method comprising:

using a broadcast transmission scheme to transmit data periodically to the plurality of mobile platforms;

determining the number of mobile platforms that have received the broadcast data in a predetermined time period and if available broadcast bandwidth is not being underutilized, then using a unicast transmission scheme to transmit the data to each of the mobile platforms that have not received the data after a predetermined number of the mobile platforms have been determined to have received the data in the predetermined time period; and

if broadcast bandwidth is being underutilized, then using said broadcast transmission scheme rather than said unicast transmission scheme to subsequently transmit said data.

2. The method according to claim 1 wherein the step of determining comprises receiving acknowledgment signals from the mobile platforms that have received the data.

3. The method according to claim 1 wherein the data is provided to systems on-board the mobile platforms and further comprising accessing the data from on-board the mobile platforms using a portable electronic device.

4. The method according to claim 1 wherein the mobile platforms are aircrafts and the steps of using a broadcast transmission scheme and a unicast transmission scheme are provided via at least one satellite.

5. The method according to claim 1 further comprising using a predefined formula to determine when to perform the step of using a unicast transmission scheme.

6. The method according to claim 1 wherein the step of using a unicast transmission scheme is provided via a point-to-point connection and further comprising waiting for mobile platform availability before using the point-to-point connection.

7. A method of transmitting data to a plurality of mobile platforms to maximize the use of available bandwidth using a communication system having a base station and at least one satellite for transmitting the data to plurality of mobile platforms, the method comprising the steps of:

broadcasting data to a plurality of mobile platforms;

receiving confirmation from the mobile platforms that have received the data;

determining the number of mobile platforms that have received the data in a predetermined time period based upon the confirmations;

transmitting the data using a point-to-point connection to the mobile platforms not providing confirmation after a predetermined number of mobile platforms have been determined to have received the data in the predetermined time period; and

switching between broadcast and point-to-point transmission schemes based upon the availability of broadcast bandwidth.

8. The method according to claim 7 wherein the confirmation comprises an acknowledgement signal identifying the specific mobile platforms that have received the data.

9. The method according to claim 7 wherein the data is real-time content for use on-board the mobile platforms and further comprising updating systems on-board the mobile platform based upon the real-time content.

10. The method according to claim 7 further comprising using a predefined formula to determine when to start performing the step of transmitting.

11. The method according to claim 7 wherein the mobile platforms are aircrafts and further comprising using at least one satellite to provide the steps of broadcasting and transmitting the data.

12. The method according to claim 7 wherein the step of broadcasting data is performed periodically.

13. The method according to claim 7 wherein the step of transmitting further comprises determining the availability of the mobile platforms to receive the data.

14. A system for maximizing bandwidth use when communicating with a plurality of mobile platforms, the system comprising:

communication means for communicating data to the plurality of mobile platforms;

receiving means on-board each of the mobile platforms for receiving the communicated data; and

a content delivery system for switching between a broadcast transmission mode and a unicast transmission mode based upon the number of mobile platforms that have received the data within a predetermined period of time, and based upon whether an available broadcast bandwidth is being underutilized.

15. The system according to claim 14 wherein the mobile platforms comprise aircrafts and further comprising at least one satellite for providing communication with the plurality of aircrafts.

16. The system according to claim 14 wherein the communication means comprises a ground-based transmitter.

17. The system according to claim 14 wherein the plurality of mobile platforms comprise aircrafts and further comprising components on-board the aircrafts for communicating the data within the aircrafts.

18. The system according to claim 17 wherein the data is Web-based and the aircrafts comprise a plurality of interfaces allowing users to access the Web-based data.