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1. (WO2019032410) METHOD AND/OR SYSTEM FOR SCHEDULING MULTIPLE RECEIVE CHAINS
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CLAIMS

What is claimed is:

1 . A method, at a mobile device, comprising:

initiating a first timer following a most recent activity event at a receiver device;

placing one or more receive chains of the receiver in a lower power state in response to an expiration of the first timer following a first duration;

initiating a second timer responsive to a request to measure an aspect of a downlink signal at the receiver device; and

transitioning at least a first receive chain of the one or more receive chains from the lower power state to a higher power state to measure the aspect of the downlink signal in response to an expiration of the second timer of a second duration.

2. The method of claim 1 , wherein the aspect of the downlink signal comprises an occasion of a positioning reference signal (PRS), and wherein the second duration terminates in response to a start of the occasion of the PRS.

3. The method of claim 1 , wherein the one or more receive chains comprise a plurality of receive chains connected to a multiple input, multiple output (MIMO) antenna system.

4. The method of claim 3, and further comprising maintaining at least one of the plurality of receive chains in the lower power state in response to the expiration of the second timer following the second duration.

5. The method of claim 1 , wherein the lower power state comprises a connected DRX mode.

6. The method of claim 1 , and further comprising placing the at least one of the one or more receive chains in the lower power state following measurement of the aspect of the downlink signal.

7. The method of claim 1 , and further comprising:

measuring the aspect of the downlink signal at two or more antenna elements of a multiple input, multiple output (MIMO) antenna system including the one or more receive chains;

determining time of arrival (TOA) measurements for acquisitions of the aspect of the downlink signal at the two or more antenna elements individually; and

determining a representative TOA measurement for positioning operations based on the TOA measurements.

8. The method of claim 7, wherein the representative TOA measurement further comprises selecting a TOA measurement from among the TOA measurements individually obtained at the two or more antenna elements having a shortest TOA.

9. The method of claim 1 , wherein the first timer comprises a C-DRX inactivity timer.

10. The method of claim 1 , wherein the one or more receive chains comprise a plurality of receive chains connected to a multiple input, multiple output (MIMO) antenna system, and further comprising:

transmitting a Rank Indicator Message on an uplink communication channel indicating reduction in a MIMO antenna system rank, wherein the reduction in the rank of the MIMO antenna system is to suspend message traffic in downlink signals to at least the first receive chain while the first receive chain is in the higher power state.

1 1 . The method of claim 10, and further comprising maintaining at least a second receive chain of the plurality of receive chains in the lower power state while transitioning the first receive chain to the higher power state in response to the expiration of the second timer following the second duration.

12. A mobile device, comprising:

a receiver device comprising two or more receive chains; and

one or more processors configured to:

initiate a first timer following a most recent activity event at the receiver device;

place one or more receive chains of the receiver device in a lower power state in response to an expiration of the first timer following a first duration;

initiate a second timer responsive to a request to measure an aspect of a downlink signal at the receiver device; and

transition at least a first receive chain of the one or more receive chains from the lower power state to a higher power state to measure the aspect of the downlink signal in response to an expiration of the second timer of a second duration.

13. The mobile device of claim 12, wherein the aspect of the downlink signal comprises an occasion of a positioning reference signal (PRS), and wherein the second duration terminates in response to a start of the occasion of the PRS.

14. The mobile device of claim 12, wherein the one or more receive chains comprise a plurality of receive chains connected to a multiple input, multiple output (MIMO) antenna system.

15. The mobile device of claim 14, wherein the one or more processors are further configured to maintain at least one of the plurality of receive chains in the lower power state in response to the expiration of the second timer following the second duration.

16. The mobile device of claim 12, wherein the lower power state comprises a connected DRX mode.

17. The mobile device of claim 12, wherein the one or more processors are further configured to place the at least one of the one or more receive chains in the lower power state following measurement of the aspect of the downlink signal.

18. The mobile device of claim 12, wherein the one or more processors are further configured to:

measure the aspect of the downlink signal at two or more antenna elements of a multiple input, multiple output (MIMO) antenna system including the one or more receive chains;

determine time of arrival (TOA) measurements for acquisitions of the aspect of the downlink signal at the two or more antenna elements individually; and

determine a representative TOA measurement for positioning operations based on the TOA measurements.

19. The mobile device of claim 18, wherein the one or more processors are further configured to determine the representative TOA measurement for positioning operations based, at least in part, on selection of a TOA measurement from among the TOA measurements individually obtained at the two or more antenna elements having a shortest TOA.

20. The mobile device of claim 12, wherein the first timer comprises a C-DRX inactivity timer.

21 . The mobile device of claim 12, wherein the one or more receive chains comprise a plurality of receive chains connected to a multiple input, multiple output (MIMO) antenna system, wherein the mobile device further comprises a transmitter device, and wherein the one or more processors are further configured to initiate transmission of a Rank Indicator Message on an uplink communication channel indicating reduction in a MIMO antenna system rank, wherein the reduction in the MIMO antenna system rank is to suspend message traffic in downlink signals to at least the first receive chain while the first receive chain is in the higher power state.

22. The mobile device of claim 21 , wherein the one or more processors are further configured to maintain at least a second receive chain of the plurality of receive chains in the lower power state while transitioning the first receive chain to the higher power state in response to the expiration of the second timer following the second duration.

23. A non-transitory storage medium comprising computer-readable instructions stored thereon which are executable by a processor of a mobile device to:

initiate a first timer following a most recent activity event at a receiver device of the mobile device;

place one or more receive chains of the receiver device in a lower power state in response to an expiration of the first timer following a first duration;

initiate a second timer responsive to a request to measure an aspect of a downlink signal at the receiver device; and

transition at least a first receive chain of the one or more receive chains from the lower power state to a higher power state to measure the aspect of the downlink signal in response to an expiration of the second timer of a second duration.

24. The non-transitory storage medium of claim 23, wherein the one or more receive chains comprise a plurality of receive chains connected to a multiple input, multiple output (MIMO) antenna system, and wherein the computer- readable instructions are further executable by the processor to maintain at least one of the plurality of receive chains in the lower power state at the expiration of the second timer of the second duration.

25. The non-transitory storage medium of claim 23, wherein the computer-readable instructions are further executable by the processor to place the at least one of the one or more receive chains in the lower power state following

measurement of the aspect of the downlink signal.

26. The non-transitory storage medium of claim 23, wherein the computer-readable instructions are further executable to:

measure the aspect of the downlink signal at two or more antenna elements of a multiple input, multiple output (MIMO) antenna system including the one or more receive chains;

determine time of arrival (TOA) measurements for acquisitions of the aspect of the downlink signal at the two or more antenna elements individually; and

determine a representative TOA measurement for positioning operations based on the TOA measurements.

27. A mobile device, comprising:

means for initiating a first timer following a most recent activity event at a receiver device;

means for placing one or more receive chains of the receiver in a lower power state in response to an expiration of the first timer following a first duration;

means for initiating a second timer responsive to a request to measure an aspect of a downlink signal at the receiver device; and

means for transitioning at least a first receive chain of the one or more receive changes from the lower power state to a higher power state to measure the aspect of the downlink signal in response to an expiration of the second timer of a second duration.

28. The mobile device of claim 27, and further comprising means for placing the at least one of the one or more receive chains in the lower power state following measurement of the aspect of the downlink signal.

29. The mobile device of claim 27, wherein the one or more receive chains comprise a plurality of receive chains connected to a multiple input, multiple output (MIMO) antenna system, the mobile device further comprising:

means for transmitting a Rank Indicator Message on an uplink communication channel indicating reduction in a MIMO antenna system rank, wherein the reduction in the MIMO antenna system rank is to suspend message traffic in downlink signals to at least the first receive chain while the first receive chain is in the higher power state.

30. The mobile device of claim 29, and further comprising means for maintaining at least a second receive chain of the plurality of receive chains in the lower power state while transitioning the first receive chain to the higher power state in response to the expiration of the second timer of the second duration.