Beam selection in a multiple beam antenna in a fixed wireless CPE

• US 8,265,552 B2
• Filed: 08/31/2010
• Issued: 09/11/2012
• Est. Priority Date: 08/31/2010
• Status: Active Grant

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Inventors: Kamel, Raafat Edward, Kamdar, Kamlesh, Aguirre, Sergio
• Primary Examiner(s): Nguyen, Lee
• Application Number:
  US12/872,677
• Publication Number:
  US 20120052828A1
• Time in Patent Office: 742 Days
• Field of Search: 455/3.01, 455/25, 455/101, 4552261-2262, 4552771-2772, 455/562.1
• US Class Current: 455/25
• CPC Class Codes: H04B 17/104 of other parameters, e.g. DC offset, delay or propagation times
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity

Abstract

A method includes scanning beams of a multiple beam antenna to collect metrics associated with the beams; selecting a best beam based on the collected metrics or based on a manual selection received from an operator; retrieving thresholds associated with the metrics; comparing the collected metrics, associated with the selected best beam, to the retrieved thresholds; and determining whether the antenna unit is in an acceptable location based on the comparison. Another method includes scanning beams of the multiple beam antenna to collect metrics associated with the beams; selecting a best beam based on the collected metrics; determining a serving beam; comparing a set of metrics associated with the selected best beam with a corresponding set of metrics associated with the serving beam; and determining whether to switch from the serving beam to the selected best beam based on the comparison.

Claims

1. A method performed by an antenna unit, the method comprising:

scanning, by a processor of the antenna unit, beams of a multiple beam antenna, coupled to the antenna unit, to collect one or more metrics associated with the beams;

selecting, by the processor, a best beam based on the collected one or more metrics or based on a manual selection received from an operator;

retrieving, by the processor, one or more thresholds associated with the one or more metrics;

comparing, by the processor, the collected one or more metrics, associated with the selected best beam, to the retrieved one or more thresholds; and

determining, by the processor, whether the antenna unit is an acceptable location based on the comparison.

2. The method of claim 1, where the one or more metrics include one or more of:

a signal to interference plus noise ratio (SINR) associated with a particular beam of the multiple beam antenna;

a reference symbol received power (RSRP) associated with the particular beam;

a path loss associated with the particular beam;

a reference symbol received quality (RSRQ) associated with the particular beam;

a ratio of a serving cell RSRP to a sum of detected cells RSRP associated with the particular beam;

a throughput associated with the particular beam;

or

a transmit power associated with the particular beam.

3. The method of claim 1, where scanning the beams of the multiple beam antenna comprises:

controlling a beam switching circuit to select a particular beam of the multiple beam antenna;

receiving signals from a base station; and

calculating the one or more metrics, associated with the particular beam, based on the received signals.

4. The method of claim 1, where comparing the collected one or more metrics, associated with the selected best beam, to the retrieved one or more thresholds comprises:

comparing the collected one or more metrics to a first set of thresholds; and

comparing the collected one or more metrics to a second set of thresholds.

5. The method of claim 4, further comprising:

activating a first indicator when the collected one or more metrics satisfy the first set of thresholds;

activating a second indicator when the collected one or more metrics do not satisfy the first set of thresholds and satisfy the second set of thresholds; and

activating a third indicator when the collected one or more metrics do not satisfy the first set of thresholds and do not satisfy the second set of thresholds.

6. The method of claim 5, where the first indicator includes a green light emitting diode (LED), the second indicator includes a yellow LED, and the third indicator includes a red LED.

7. The method of claim 5, where the first indicator activates a first state of a display device, the second indicator activates a second state of the display device, and the third indicator activates a third state of the display device.

8. The method of claim 1, where the method is performed during installation of the antenna unit.

9. A method performed by an antenna unit, the method comprising:

monitoring, by a processor of the antenna unit, particular information associated with a serving beam;

determining, by the processor, if a value associated with the particular information is below a threshold;

scanning, by the processor and when the value associated with the particular information is below the threshold, beams of a multiple beam antenna, coupled to the antenna unit, to collect one or more metrics associated with the beams;

selecting, by the processor, a best beam based on the collected one or more metrics;

comparing, by the processor, a set of metrics associated with the selected best beam with a corresponding set of metrics associated with the serving beam; and

determining, by the processor, whether the antenna unit is an acceptable location based on the comparison.

10. The method of claim 9, where the one or more metrics include one or more of:

a signal to interference plus noise ratio (SINR) associated with a particular beam of the multiple beam antenna;

a reference symbol received power (RSRP) associated with the particular beam;

a path loss associated with the particular beam;

a reference symbol received quality (RSRQ) associated with the particular beam;

a ratio of a serving cell RSRP to a sum of detected cells RSRP associated with the particular beam;

a throughput associated with the particular beam;

or

a transmit power associated with the particular beam.

11. The method of claim 9, further comprising:

detecting a trigger event to scan the beams; and

scanning the beams based on detecting the trigger event.

12. The method of claim 11, where detecting the trigger event includes at least one of:

detecting that a particular interval has elapsed;

detecting that a particular metric associated with the serving beam is greater than a threshold;

detecting a change in services provided to the device coupled to the antenna unit;

or

receiving a request to scan the beams via a wireless signal.

13. The method of claim 9, further comprising:

scheduling the scanning such that scanning the beams will not interfere with operation of the device.

14. The method of claim 13, where scheduling the scanning comprises:

determining that the device is in an idle mode in relation to a radio control channel; and

scheduling the scanning for radio frames that do not coincide with paging frames associated with the idle mode.

15. The method of claim 13, where scheduling the scanning comprises:

determining that the device is in a connected mode in relation to a radio control channel; and

scheduling the scanning for radio frames that do not coincide with radio frames during which the device needs to monitor a paging channel.

16. The method of claim 9, further comprising:

determining whether to switch from the serving beam to the selected best beam based on the comparison, the determining whether to switch from the serving beam to the selected best beam including;

determining that switching from the serving beam to the selected best beam would result in a handover;

determining that one or more metrics, of the set of metrics associated with the selected best beam, are greater than a corresponding one or more metrics, of the set of metrics associated with the serving beam, plus a handover constant; and

switching from the serving beam to the selected best beam based on determining that one or more metrics, of the set of metrics associated with selected best beam, are greater than the corresponding one or more metrics, of the set of metrics associated with the serving beam, plus the handover constant.

17. The method of claim 9, further comprising:

determining whether to switch from the serving beam to the selected best beam based on the comparison, the determining whether to switch from the serving beam to the selected best beam including;

determining that switching from the serving beam to the selected best beam would not result in a handover;

determining that one or more metrics, of the set of metrics associated with the selected best beam, are greater than a corresponding one or more metrics, of the set of metrics associated with the serving beam, plus a no handover constant; and

switching from the serving beam to the selected best beam based on determining that one or more metrics, of the set of metrics associated with selected best beam, are greater than the corresponding one or more metrics, of the set of metrics associated with the serving beam, plus the no handover constant.

18. A device comprising:

a multiple beam antenna;

a switching circuit to select a particular beam of the multiple beam antenna; and

a beam switching controller to control the switching circuit to select the particular beam, the beam switching controller to;

monitor particular information associated with a serving beam;

determine if a value associated with the particular information is below a threshold;

scan, when the value associated with the particular information is below the threshold, beams of the multiple beam antenna to collect one or more metrics associated with the beams;

select a best beam based on the collected one or more metrics or based on a manual selection received from an operator;

compare a set of metrics associated with the selected best beam with a corresponding set of metrics associated with the serving beam; and

determine whether the antenna unit is an acceptable location based on the comparison.

19. The device of claim 18, where the beam switching controller further comprises:

an antenna table to store the collected one or more metrics, where the collected one or more metrics include one or more of;

a signal to interference plus noise ratio (SINR) associated with a particular beam of the multiple beam antenna;

a reference symbol received power (RSRP) associated with the particular beam;

a path loss associated with the particular beam;

a reference symbol received quality (RSRQ) associated with the particular beam;

a ratio of a serving cell RSRP to a sum of detected cells RSRP associated with the particular beam;

a throughput associated with the particular beam;

or

a transmit power associated with the particular beam.

20. The device of claim 18, where the beam switching controller is further to:

detect a trigger event to scan the beams; and

scan the beams based on detecting the trigger event.

21. The device of claim 20, where the beam switching controller is to detect the trigger event based on at least one of:

detecting that a particular interval has elapsed;

detecting that a particular metric associated with the serving beam is greater than a threshold;

detecting a change in services provided to the device;

or

receiving a request to scan the beams via a wireless signal.

22. The device of claim 18, where the beam switching controller is further to:

schedule the scanning such that scanning the beams will not interfere with operation of the device.

23. The device of claim 22, where the beam switching controller is further to:

determine that the device is in an idle mode in relation to a radio control channel; and

schedule the scanning for radio frames that do not coincide with paging frames associated with the idle mode.

24. The device of claim 22, where the beam switching controller is further to:

determine that the device is in a connected mode in relation to a radio control channel; and

schedule the scanning for radio frames that do not coincide with radio frames during which the device needs to monitor a paging channel.

25. The device of claim 18, where the beam switching controller is further to:

determine that switching from the serving beam to the selected best beam would result in a handover;

determine that one or more metrics, of the set of metrics associated with the selected best beam, are greater than a corresponding one or more metrics, of the set of metrics associated with the serving beam, plus a handover constant; and

switch from the serving beam to the selected best beam based on determining that one or more metrics, of the set of metrics associated with selected best beam, are greater than the corresponding one or more metrics, of the set of metrics associated with the serving beam, plus the handover constant.

26. The device of claim 18, where the beam switching controller is further to:

determine that switching from the serving beam to the selected best beam would not result in a handover;

determine that one or more metrics, of the set of metrics associated with selected best beam, are greater than a corresponding one or more metrics, of the set of metrics associated with the serving beam, plus a no handover constant; and

switch from the serving beam to the selected best beam based on determining that one or more metrics, of the set of metrics associated with selected best beam, are greater than the corresponding one or more metrics, of the set of metrics associated with the serving beam, plus the no handover constant.

27. The device of claim 18, further comprising:

an indicator, where the beam switching controller further comprises;

an indicator selection component to;

activate a first state of the indicator when the collected one or more metrics satisfy a first set of thresholds;

activate a second state of the indicator when the collected one or more metrics do not satisfy the first set of thresholds and satisfy the second set of thresholds; and

activate a third state of the indicator when the collected one or more metrics do not satisfy the first set of thresholds and do not satisfy the second set of thresholds.

28. One or more computer-readable memory devices storing instructions, the instructions comprising:

one or more instructions which, when executed by a processor, cause the processor to scan beams of a multiple beam antenna to collect one or more metrics associated with the beams;

one or more instructions which, when executed by the processor, cause the processor to select a best beam based on the collected one or more metrics;

one or more instructions which, when executed by the processor, cause the processor to retrieve one or more thresholds associated with the one or more metrics;

one or more instructions which, when executed by the processor, cause the processor to compare the collected one or more metrics, associated with the selected best beam, to the retrieved one or more thresholds; and

one or more instructions which, when executed by the processor, cause the processor to determine whether the antenna unit is in an acceptable location based on the comparison.

29. One or more computer-readable memory devices storing instructions, the devices instructions comprising:

one or more instructions which, when executed by a processor, cause the processor to monitor particular information associated with a serving beam;

one or more instructions which, when executed by a processor, cause the processor to determine if a value associated with the particular information is below a threshold;

one or more instructions which, when executed by the processor, cause the processor to scan, when the value associated with the particular information is below the threshold, beams of a multiple beam antenna, coupled to an antenna unit, to collect one or more metrics associated with the beams;

one or more instructions which, when executed by the processor, cause the processor to select a best beam based on the collected one or more metrics;

one or more instructions which, when executed by the processor, cause the processor to compare a set of metrics associated with the selected best beam with a corresponding set of metrics associated with the serving beam; and

one or more instructions which, when executed by the processor, cause the processor to determine whether the antenna unit is an acceptable location based on the comparison.