System and method for channel selection to reduce impact to an existing network

Patent metadata

Field	Value
Publication number	US-9756611-B2
Application number	US-201314078362-A
Country	US
Kind code	B2
Filing date	Nov 12, 2013
Priority date	Nov 12, 2013
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Described herein are techniques for reducing interference to non-cellular communications on an unlicensed band by a network entity sending/receiving cellular communications on the unlicensed band. For example, the technique may involve accessing a list of channels for cellular communication on the unlicensed band, the list having the channels in an order of priority for reducing interference to non-cellular communication on the unlicensed band. The technique may involve determining an interference criteria for a received signal, the interference criteria being based at in part on at least one of a received signal strength indicator (RSSI) or a duty cycle of the received signal. The technique may involve going through, in the order of priority, each channel in the list to identify a first channel that satisfies the interference criteria.

First claim

What is claimed is:

1. A method operable by a network entity configured for wireless communication, comprising:
accessing a list of channels for cellular communication on an unlicensed band, the list having the channels in an order of priority for reducing interference to non-cellular communication on the unlicensed band;
determining an interference criteria for a received signal, the interference criteria corresponding to a metric that combines a received signal strength indicator (RSSI) and a duty cycle of the received signal;
selecting, based on the order of priority, a first channel from the list of channels that has not been previously selected and that has a highest priority for reducing interference to non-cellular communication on the unlicensed band; and
determining whether the first channel satisfies the interference criteria;
when the first channel satisfies the interference criteria, selecting the first channel for cellular communication in the unlicensed band to further reduce the interference to non-cellular communication in the unlicensed band;
when the first channel does not satisfy the interference criteria, selecting, based on the order of priority, a second channel from the list of channels that has not been previously selected and that has the highest priority for reducing interference to non-cellular communication on the unlicensed band, the second channel selected to determine whether the second channel satisfies the interference criteria;
in response to none of the channels in the list satisfying the interference criteria, identifying a best suited channel from the list on which the cellular communication results in a least amount of interference to non-cellular communication on the unlicensed band without going through, in the order of priority, each channel in the list again; and
selecting the best suited channel for cellular communication in the unlicensed band to further reduce the interference to non-cellular communication in the unlicensed band.

2. The method of claim 1 , wherein:
the cellular communication comprises Long Term Evolution (LTE) communication on the unlicensed band; and
the non-cellular communication comprises wireless local area network (WLAN) communication on the unlicensed band.

3. The method of claim 2 , wherein the WLAN communication comprises 802.11 (Wi-Fi) communication on the unlicensed band.

4. The method of claim 1 , wherein identifying the best suited channel further comprises:
for each channel in the list, determining the RSSI;
apportioning non-cellular contribution and cellular contribution to the RSSI; and
assigning higher weight to the non-cellular contribution to the RSSI.

5. The method of claim 1 , wherein the network entity comprises a mobile device or a small base station.

6. An apparatus, comprising:
means for accessing a list of channels for cellular communication on an unlicensed band, the list having the channels in an order of priority for reducing interference to non-cellular communication on the unlicensed band;
means for determining an interference criteria for a received signal, the interference criteria corresponding to a metric that combines a received signal strength indicator (RSSI) and a duty cycle of the received signal;
means for selecting, based on the order of priority, a first channel from the list of channels that has not been previously selected and has a highest priority for reducing interference to non-cellular communication on the unlicensed band;
mean for determining whether the first channel that satisfies the interference criteria;
means for selecting the first channel for cellular communication in the unlicensed band to further reduce the interference to non-cellular communication in the unlicensed band when the first channel satisfies the interference criteria;
means for selecting, based on the order of priority, a second channel from the list of channels that has not been previously selected and that has the highest priority for reducing interference to non-cellular communication on the unlicensed band, the second channel selected to determine whether the second channel satisfies the interference criteria when the first channel does not satisfy the interference criteria;
means for identifying a best suited channel from the list on which the cellular communication results in a least amount of interference to non-cellular communication on the unlicensed band, in response to none of the channels in the list satisfying the interference criteria without going through, in the order of priority, each channel in the list again; and
means for selecting the best suited channel for cellular communication in the unlicensed band to further reduce the interference to non-cellular communication in the unlicensed band.

7. The apparatus of claim 6 , wherein:
the cellular communication comprises Long Term Evolution (LTE) communication on the unlicensed band; and
the non-cellular communication comprises wireless local area network (WLAN) communication on the unlicensed band.

8. The apparatus of claim 6 , further comprising:
means for determining the RSSI for each channel in the list;
means for apportioning non-cellular contribution and cellular contribution to the RSSI; and
means for assigning higher weight to the non-cellular contribution to the RSSI.

9. An apparatus, comprising:
at least one radio frequency (RF) transceiver;
at least one processor coupled to the at least one RF transceiver and configured to:
access a list of channels for cellular communication on an unlicensed band, the list having the channels in an order of priority for reducing interference to non-cellular communication on the unlicensed band;
determine an interference criteria for a received signal, the interference criteria corresponding to a metric that combines a received signal strength indicator (RSSI) and a duty cycle of the received signal;
select, based on the order of priority, a first channel from the list of channels that has not been previously selected and that has a highest priority for reducing interference to non-cellular communication on the unlicensed band;
determine whether the first channel satisfies the interference criteria;
when the first channel satisfies the interference criteria, select the first channel for cellular communication in the unlicensed band to further reduce the interference to non-cellular communication in the unlicensed band;
when the first channel does not satisfy the interference criteria, select, based on the order of priority, a second channel from the list of channels that has not been previously selected and that has the highest priority for reducing interference to non-cellular communication on the unlicensed band, the second unselected channel selected to determine whether the second channel satisfies the interference criteria without going through, in the order of priority, each channel in the list again;
identify a best suited channel from the list on which the cellular communication results in a least amount of interference to non-cellular communication on the unlicensed band, in response to none of the channels in the list satisfying the interference criteria;
select the best suited channel for cellular communication in the unlicensed band to further reduce the interference to non-cellular communication in the unlicensed band; and

a memory coupled to the at least one processor for storing data.

10. The apparatus of claim 9 , wherein the at least one processor is further configured to:
determine the RSSI for each channel in the list;
apportion non-cellular contribution and cellular contribution to the RSSI; and
assign higher weight to the non-cellular contribution to the

Assignees

• Qualcomm Inc

Inventors

• Yavuz Mehmet
• Sadek Ahmed Kamel

Classifications

• H04W72/56

  based on priority criteria · CPC title

• H04W72/541 Primary

  using the level of interference · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W72/02 Primary

  Selection of wireless resources by user or terminal · CPC title

• H04W72/10

  Electricity · mapped topic