Channel selection method used in a communication system

• US 20030072252A1
• Filed: 10/17/2001
• Published: 04/17/2003
• Est. Priority Date: 10/17/2001
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Gurney, David P., Kuffner, Stephen L., Rachwalski, Richard Stanley, Collins, Timothy James, Eastmond, Bruce C.
• Granted Patent: US 6,754,190 B2
• Time in Patent Office: Days
• US Class Current: 370/206
• CPC Class Codes: H04N 21/4622 Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

A source device (110) stores predetermined data and establishes a channel selection profile comprising a plurality of channel selections. Each channel selection is derived from a subset of the predetermined data. The source device (110) transmits at least a portion of the predetermined data over at least a first channel selected from the channel selection profile.

Claims

1. A method comprising the steps of:

storing predetermined data;

establishing a channel selection profile comprising a plurality of channel selections, wherein each channel selection is derived from a subset of the predetermined data; and

transmitting at least a portion of the predetermined data over at least a first channel selected from the channel selection profile.

2. The method of claim 1 wherein each channel selection is derived from a unique subset of the predetermined data

3. The method of claim 1 wherein the step of transmitting commences after a predetermined condition is satisfied.

4. The method of claim 3 further comprising the step of receiving a power level, and wherein the predetermined condition is satisfied when the power level exceeds a predetermined threshold.

5. The method of claim 1 further comprising the step of ceasing the step of transmitting when a predetermined condition is satisfied.

6. The method of claim 5 further comprising the step of receiving a power level, and wherein the predetermined condition is satisfied when the power level exceeds a predetermined threshold.

7. The method of claim 5 further comprising the step of receiving a power level, and wherein the predetermined condition is satisfied when the power level falls below a predetermined threshold.

8. The method of claim 1 wherein a first channel selection in the channel selection profile is selected from a first set of channels, and a second channel selection in the channel selection profile is selected from a second set of channels, wherein a number of channels in the first set of channels is different from a number of channels in the second set of channels.

9. The method of claim 1 further comprising the step of randomizing the predetermined data prior to establishing the channel selection profile.

10. The method of claim 9 wherein the step of randomizing is based on at least one of the following algorithms:

a scrambling algorithm, an encryption algorithm

11. The method of claim 1 wherein the step of transmitting utilizes spread spectrum modulation.

12. The method of claim 1 wherein the plurality of channel selections are uniformly distributed.

13. A device comprising:

a storage medium for storing predetermined data;

a channel selector, coupled to the storage medium, for generating a channel selection profile comprising a plurality of channel selections, wherein each channel selection is derived from a subset of the predetermined data; and

a transmitter, coupled to the storage medium, for transmitting at least a portion of the predetermined data over at least a first channel selected from the channel selection profile.

14. The device of claim 13 wherein the first channel selected from the channel selection profile is orthogonal to a second channel selected from the channel selection profile.

15. The device of claim 13 wherein the first channel selected from the channel selection profile is quasi-orthogonal to a second channel selected from the channel selection profile.

16. The device of claim 13 wherein a channel selected from the channel selection profile utilizes a specially augmented pseudonoise sequence.

17. The device of claim 13 wherein the device is at least one of the following:

an active device, and a passive device.

18. A system comprising a plurality of first devices in communication with a second device, wherein each first device stores predetermined data, establishes a channel selection profile comprising a plurality of channel selections, and transmits at least a portion of the predetermined data over at least a first channel selected from the channel selection profile, and wherein each channel selection is derived from a subset of the predetermined data, and wherein at least two first devices transmit synchronously.

19. The system of claim 18 wherein at least two first devices transmit simultaneously.

20. The system of claim 18 wherein the second device performs a collision mitigation technique.

21. The system of claim 18 wherein at least one first device continues to transmit at least a portion of the predetermined data over a channel selected from the channel selection profile for a number of passes, wherein a new channel is selected during each pass.

22. The system of claim 21 wherein the second device controls the number of passes.

23. The system of claim 21 wherein the number of passes is known a priori to the second device.