Multi-radio coexistence system to select ISM communications frequency bands to avoid cellular communications interference

• US 9,374,829 B2
• Filed: 01/30/2013
• Issued: 06/21/2016
• Est. Priority Date: 02/08/2012
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wang, Jibing, Linsky, Joel Benjamin
• Primary Examiner(s): Gelin, Jean
• Application Number:
  US13/753,596
• Publication Number:
  US 20130203432A1
• Time in Patent Office: 1,238 Days
• Field of Search: 455/452.1, 455/452.2, 455/447, 455/448, 455/464
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Frequency bands for Industrial Scientific and Medical (ISM) communications are selected to avoid interference with the cellular communication. In one aspect of the disclosure, the frequency bands for Bluetooth/WLAN communication are selected to avoid channels that are within a predetermined distance of a harmonic of a cellular (e.g., wireless wide area network) receive frequency band. That is, a frequency band is selected that is at least a predetermined distance from the cellular receive frequency bands.

Claims

1. A method of wireless communication, comprising:

determining an operating cellular receive frequency band to be received at a user equipment and an operating cellular transmit frequency band;

determining at least one integer multiple of the operating cellular receive frequency band; and

selecting at least one Industrial Scientific and Medical (ISM) frequency band for ISM communications based on reducing interference between ISM communications and communications with the operating cellular receive frequency band and the operating cellular transmit frequency band, the interference caused by inter-modulation effects when a difference between the operating cellular transmit frequency band and an identified ISM transmit frequency band is substantially equal to the operating cellular receive frequency band.

2. The method of claim 1, in which the selecting comprises selecting the at least one ISM frequency band that is at least a predetermined distance from the at least one integer multiple of the operating cellular receive frequency band.

3. The method of claim 1, further comprising determining an active set of operating cellular frequency bands, and in which the selecting is further based on the active set.

4. The method of claim 1, in which the ISM communications include a wireless technology standard for exchanging data over short distancesor wireless local area network communications.

5. An apparatus for wireless communication, comprising:

means for determining an operating cellular receive frequency band to be received at a user equipment and an operating cellular transmit frequency band;

means for determining at least one integer multiple of the operating cellular receive frequency band; and

means for selecting at least one Industrial Scientific and Medical (ISM) frequency band for ISM communications based on reducing interference between ISM communications and communications with the operating cellular receive frequency band and the operating cellular transmit frequency band, the interference caused by inter-modulation effects when a difference between the operating cellular transmit frequency band and an identified ISM transmit frequency band is substantially equal to the operating cellular receive frequency band.

6. The apparatus of claim 5, in which the selecting means further comprises means for selecting the at least one ISM frequency band that is at least a predetermined distance from the at least one integer multiple of the operating cellular receive frequency band.

7. The apparatus of claim 5, further comprising means for determining an active set of operating cellular frequency bands, and in which the means for selecting further comprises means for selecting based on the active set.

8. The apparatus of claim 5, in which the ISM communications include a wireless technology standard for exchanging data over short distances or wireless local area network communications.

9. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured;

to determine an operating cellular receive frequency band to be received at a user equipment and an operating cellular transmit frequency band;

to determine at least one integer multiple of the operating cellular receive frequency band; and

to select at least one Industrial Scientific and Medical (ISM) frequency band for ISM communications based on reducing interference between ISM communications and communications with the operating cellular receive frequency band and the operating cellular transmit frequency band, the interference caused by inter-modulation effects when a difference between the operating cellular transmit frequency band and an identified ISM transmit frequency band is substantially equal to the operating cellular receive frequency band.

10. The apparatus of claim 9, in which the at least one processor is further configured to select by selecting the at least one ISM frequency band that is at least a predetermined distance from the at least one integer multiple of the operating cellular receive frequency band.

11. The apparatus of claim 9, in which the at least one processor is further configured to determine an active set of operating cellular frequency bands, and in which the at least one processor is further configured to select based on the active set.

12. The apparatus of claim 9, in which the ISM communications include a wireless technology standard for exchanging data over short distances or wireless local area network communications.

13. A non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising:

program code to determine an operating cellular receive frequency band to be received at a user equipment and an operating cellular transmit frequency band;

program code to determine at least one integer multiple of the operating cellular receive frequency band; and

program code to select at least one Industrial Scientific and Medical (ISM) frequency band for ISM communications based on reducing interference between ISM communications and communications with the operating cellular receive frequency band and the operating cellular transmit frequency band, the interference caused by inter-modulation effects when a difference between the operating cellular transmit frequency band and an identified ISM transmit frequency band is substantially equal to the operating cellular receive frequency band.

14. The computer-readable medium of claim 13, in which the program code further comprises code to select by selecting the at least one ISM frequency band that is at least a predetermined distance from the at least one integer multiple of the operating cellular receive frequency band.

15. The computer-readable medium of claim 13, in which the program code further comprises code to determine an active set of operating cellular frequency bands, and in which the program code further comprises code to select based on the active set.

16. The computer-readable medium of claim 13, in which the ISM communications include a wireless technology standard for exchanging data over short distances or wireless local area network communications.