Transitioning between different scheduling delay assumptions
Systems and methods are disclosed herein for transitioning between different scheduling delay assumptions. In some embodiments, a method performed by a wireless device comprises monitoring, during a first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with an assumption of a first scheduling delay that is equal to or exceeds a first value. The method further comprises determining that the wireless device is to switch from the assumption of the first scheduling delay to an assumption of a second scheduling delay that is equal to or exceeds a second value that is less than the first value. The method further comprises monitoring, during one or more later slots that occur after the first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay.
1. A method performed by a wireless device, the method comprising:
monitoring, during a first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with an assumption of a first scheduling delay, the first scheduling delay being equal to or exceeding a first value;
determining that the wireless device is to switch from the assumption of the first scheduling delay to an assumption of a second scheduling delay, the second scheduling delay being equal to or exceeding a second value, the second value being less than the first value; and
monitoring, during one or more later slots that occur after the first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay.
2. The method of claim 1 , wherein:
monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay comprises monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay in a particular search space; and
monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay comprises monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay in the particular search space.
3. The method of claim 1 , wherein:
monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay comprises monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay in a first search space; and
monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay comprises monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay in a second search space that is different than the first search space.
4. The method of claim 3 , wherein the first search space is associated with a first bandwidth and the second search space is associated with a second bandwidth, wherein the first bandwidth is smaller than the second bandwidth.
5. The method of claim 1 , wherein determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay comprises determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay in response to an explicit or implicit indication from a network node.
6. The method of claim 5 , wherein the explicit or implicit indication is an explicit indication comprised in downlink control information from the network node.
7. The method of claim 1 , wherein:
monitoring, during the first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay comprises monitoring, during the first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay while the wireless device operates in a first power mode that is associated with the first scheduling delay; and
determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay comprises transitioning from the first power mode to a second power mode associated with the second scheduling delay.
8. The method of claim 7 , wherein transitioning from the first power mode to the second power mode associated with the second scheduling delay comprises transitioning from the first power mode to a second power mode associated with the second scheduling delay in response to an indication comprised in downlink control information from a network node.
9. A method performed by a wireless device, the method comprising:
monitoring, during a first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with an assumption of a first scheduling delay, the first scheduling delay being equal to or exceeding a first value;
determining that the wireless device is to switch from the assumption of the first scheduling delay to an assumption of a second scheduling delay, the second scheduling delay being equal to or exceeding a second value, the second value being less than the first value, wherein determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay comprises transitioning from the first power mode to a second power mode associated with the second scheduling delay,
wherein transitioning from the first power mode to the second power mode associated with the second scheduling delay comprises transitioning from the first power mode to a second power mode associated with the second scheduling delay upon sending a Hybrid Automatic Repeat Request, HARQ, Acknowledgement, ACK, for a transmission scheduled by downlink control information comprised in a downlink control channel detected in the first slot; and
monitoring, during one or more later slots that occur after the first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay.
10. The method of claim 7 , wherein transitioning from the first power mode to the second power mode associated with the second scheduling delay comprises transitioning from the first power mode to a second power mode associated with the second scheduling delay upon expiration of a timer.
11. The method of claim 10 , wherein expiration of the timer is dependent on lack of receiving a downlink control channel.
12. The method of claim 10 , wherein expiration of the timer is dependent on lack of receiving a downlink control channel in a configured number of monitoring occasions.
13. The method of claim 7 , wherein:
the first power mode is a Power Savings Mode, PSM, and the second power mode is a non-PSM; or
the first power mode is a non-PSM and the second power mode is a PSM.
14. The method of claim 13 , wherein the PSM is a mode in which only cross-slot scheduling is used, and the non-PSM is a mode in which same-slot scheduling can be used.
15. The method of claim 1 , wherein determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay comprises determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption with the second scheduling delay upon sending a Hybrid Automatic Repeat Request, HARQ, Acknowledgement, ACK, for a transmission scheduled by downlink control information comprised in a downlink control channel detected in the first slot.
16. The method of claim 1 , wherein determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay comprises determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay upon expiration of a timer.
17. The method of claim 16 , wherein expiration of the timer is dependent on lack of receiving a downlink control channel in a configured number of monitoring occasions.
18. The method of claim 1 , wherein the first value is a value that corresponds to a value that is greater than or equal to one slot.
19. The method of claim 18 , wherein the first value is a value determined based on a wireless device indication dependent on only physical downlink shared channel numerology, or physical downlink control channel and physical downlink shared channel numerologies.
20. The method of claim 18 , further comprising, based on an assumption that downlink scheduling detected on the downlink control channel in the first slot schedules a downlink transmission to the wireless device with the first scheduling delay that exceeds the first value, operating in a low power mode during the first slot when not monitoring the downlink control channel.
21. The method of claim 18 , wherein monitoring the downlink control channel during the first slot comprises monitoring the downlink control channel at a beginning portion of the first slot, and the method further comprises:
based on the assumption of the first scheduling delay, operating in a low power mode during the first slot starting at an end of the beginning portion of the first slot during which the downlink control channel is monitored.
22. The method of claim 1 , wherein determining that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay comprises determining that a downlink control channel comprising downlink control information that schedules a transmission for the wireless device is detected during the first slot.
23. The method of claim 22 , wherein the one or more later slots comprise a second slot that immediately follows the first slot.
24. The method of claim 22 , wherein the one or more later slots occur after a slot in which the wireless device sends a Hybrid Automatic Repeat Request, HARQ, response for the transmission scheduled by the downlink control information comprised in the downlink control channel detected in the first slot.
25. The method of claim 22 , wherein the one or more later slots occur after a slot in which the wireless device sends a Hybrid Automatic Repeat Request, HARQ, Acknowledgement, ACK, for the transmission scheduled by the downlink control information comprised in the downlink control channel detected in the first slot.
26. The method of claim 22 , wherein the one or more later slots occur after a slot in which the wireless device detects another downlink control channel that comprises downlink control information that schedules a transmission for the wireless device in accordance with the second scheduling delay.
27. The method of claim 24 , further comprising:
in one or more subsequent slots that follow the first slot and precede the one or more later slots, monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay.
28. The method of claim 22 , wherein the first slot is during a Discontinuous Reception, DRX, On Duration, and the one or more later slots are all slots that occur later than the first slot in the DRX On Duration.
29. The method of claim 22 , further comprising:
switching to monitoring for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay or with both the assumption of the first scheduling delay and the assumption of the second scheduling delay.
30. A wireless device comprising:
radio front end circuitry; and
processing circuitry associated with the radio front end circuitry, the processing circuitry configured to cause the wireless device to:
monitor, during a first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with an assumption of a first scheduling delay, the first scheduling delay being equal to or exceeding a first value;
determine that the wireless device is to switch from the assumption of the first scheduling delay to an assumption of a second scheduling delay, the second scheduling delay being equal to or exceeding a second value, the second value being less than the first value; and
monitor, during one or more later slots that occur after the first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the second scheduling delay.
31. The wireless device of claim 30 , wherein, in order to cause the wireless device to determine that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay, the processing circuitry is further configured to cause the wireless device to determine that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay in response to an explicit or implicit indication from a network node.
32. The wireless device of claim 31 , wherein the explicit or implicit indication is an explicit indication comprised in downlink control information from the network node.
33. The wireless device of claim 30 , wherein:
the processing circuitry is further configured to cause the wireless device to monitor, during the first slot, for a downlink control channel comprising downlink control information that schedules a transmission for the wireless device with the assumption of the first scheduling delay while the wireless device operates in a first power mode that is associated with the first scheduling delay; and
in order to cause the wireless device to determine that the wireless device is to switch from the assumption of the first scheduling delay to the assumption of the second scheduling delay, the processing circuitry is further configured to cause the wireless device to transition from the first power mode to a second power mode associated with the second scheduling delay.
34. The wireless device of claim 33 , wherein the processing circuitry is further configured to cause the wireless device to transition from the first power mode to the second power mode in response to an indication comprised in downlink control information from a network node.