Action time signalling for semi-persistent scheduling (sps) or configured grant (cg) reactivation

Patent metadata

Field	Value
Publication number	US-2021007088-A1
Application number	US-202016918502-A
Country	US
Kind code	A1
Filing date	Jul 1, 2020
Priority date	Jul 3, 2019
Publication date	Jan 7, 2021
Grant date	—

Abstract

Apparatuses and methods for wireless communication are provided. In an aspect, a user equipment (UE) receives a DCI from a base station, the DCI including an update to a periodically-occurring scheduling, where an absolute time for the update to take effect is specified in an RRC configuration of the DCI. The UE applies the update to the periodically-occurring scheduling for communications of the UE beginning at and following the absolute time. In another aspect, the UE receives at least one downlink communication that updates a plurality of SPS or CG parameters. The UE determines an action time for the update to take effect for each parameter, where the action time is a function of a type of each parameter. The UE applies the update to each parameter for communications of the UE beginning at and following a respective action time.

First claim

What is claimed is:

1 . A method of wireless communication for a user equipment (UE), comprising:
receiving, by the UE, an activation/reactivation downlink control information (DCI) from a base station, the activation/reactivation DCI including an update to a periodically-occurring scheduling, wherein an absolute time for the update to take effect is specified in a radio resource control (RRC) configuration of the activation/reactivation DCI; and applying the update to the periodically-occurring scheduling for communications of the UE beginning at and following the absolute time.

2 . The method of claim 1 , wherein the periodically-occurring scheduling comprises a semi-persistent scheduling (SPS) or configured grant (CG) parameter, wherein the absolute time is common to a group of UEs including the UE, wherein updates to one or more SPS or CG parameters of the group of UEs take effect simultaneously at the absolute time.

3 . The method of claim 1 , wherein the absolute time is after an end of the activation/reactivation DCI.

4 . The method of claim 1 , wherein the absolute time is a next boundary within a set of periodic time boundaries.

5 . The method of claim 1 , wherein the absolute time is expressed in a frame index, a subframe index, a slot index, or a symbol index.

6 . A method of wireless communication for a user equipment (UE), comprising:
receiving, by the UE, at least one downlink communication from a base station, the at least one downlink communication including an update to a plurality of semi-persistent scheduling (SPS) or configured grant (CG) parameters; determining an action time for the update to take effect for each of the plurality of SPS or CG parameters, wherein the action time is a function of a type of each of the plurality of SPS or CG parameters, wherein the action time is selected from a group including at least a first action time associated with a first type of parameter and a second action time associated with a second type of parameter, the second action time being different than the first action time; and applying the update to respective ones of the plurality of SPS or CG parameters for communications of the UE beginning at and following each respective action time for the respective ones of the plurality SPS or CG parameters.

7 . The method of claim 6 , wherein the first action time is a first periodic time boundary after the downlink communication and the second action time is a second periodic time boundary after the downlink communication, the first periodic time boundary being different than the second periodic time boundary.

8 . The method of claim 6 , wherein each action time is specified in the downlink communication.

9 . The method of claim 6 , wherein receiving the at least one downlink communication comprises receiving at least one of an activation/reactivation downlink control information (DCI) or a medium access control (MAC) control element (CE) or a radio resource control (RRC) signaling that includes each action time that updates the plurality of SPS or CG parameters.

10 . The method of claim 6 , wherein the at least one downlink communication comprises an activation/reactivation downlink control information (DCI) indicating an updated scheduling offset, the method further comprising:
applying the updated scheduling offset for the communications of the UE beginning at and following the first action time, wherein the first action time coincides with an end of a transmission of the activation/reactivation DCI.

11 . The method of claim 10 , wherein the activation/reactivation DCI further indicates an updated non-scheduling parameter, the method further comprising:
applying the updated non-scheduling parameter for the communications of the UE beginning at and following the second action time, wherein the second action time coincides with an amount of time after the end of the transmission of the activation/reactivation DCI.

12 . The method of claim 11 , wherein the communications of the UE comprise a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), wherein the updated scheduling offset comprises a K0 or a K2.

13 . The method of claim 11 , wherein the second action time is specified as a K0 or a K2 plus a time delay.

14 . The method of claim 10 , further comprising:
identifying a transient period that starts with the activation/reactivation DCI and ends with a first updated scheduled transmission according to the updated scheduling parameter indicated in the activation/reactivation DCI.

15 . The method of claim 14 , further comprising:
skipping communication of scheduled transmissions that are according to a previous SPS or CG configuration in the transient period.

16 . The method of claim 14 , further comprising:
determining whether to allow communication of a scheduled transmission that is according to a previous SPS or CG configuration in the transient period.

17 . The method of claim 16 , wherein the determining whether to allow the communication of the scheduled transmission comprises:
skipping the communication of the scheduled communication in response to the scheduled communication comprising a physical downlink shared channel (PDSCH) with an uplink feedback resource that is after the first updated scheduled transmission; and allowing the communication of the scheduled communication otherwise.

18 . The method of claim 16 , wherein the determining whether to allow the communication of the scheduled transmission comprises:
skipping the communication of the scheduled communication in response to the scheduled communication comprising a physical downlink shared channel (PDSCH) with a same hybrid automatic repeat request (HARQ) identifier (ID) as the first updated scheduled transmission and an uplink feedback resource that is after the first updated scheduled transmission; and allowing communication of the scheduled communication otherwise.

19 . The method of claim 16 , wherein the determining whether to allow the communication of the scheduled transmission comprises:
skipping the communication of the scheduled communication in response to the scheduled communication overlapping with the first updated scheduled transmission; and allowing the communication of the scheduled communication otherwise.

20 . A user equipment (UE) for wireless communication, comprising:
a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:
receive, by the UE, an activation/reactivation downlink control information (DCI) from a base station, the activation/reactivation DCI including an update to a periodically-occurring scheduling, wherein an absolute time for the update to take effect is specified in a radio resource control (RRC) configuration of the activation/reactivation DCI; and
apply the update to the periodically-occurring scheduling for communications of the UE beginning at and following the absolute time.

21 . The UE of claim 20 , wherein the periodically-occurring scheduling comprises a semi-persistent scheduling (SPS) or configured grant (CG) parameter, wherein the absolute time is common to a group of UEs including the UE, wherein updates to one or more SPS or CG parameters of the group of UEs take effect simultaneously at the absolute time.

22 . The UE of claim 20 , wherein the absolute time is

Assignees

• Qualcomm Inc

Inventors

• Zhou Yan
• Luo Tao
• Pezeshki Hamed
• Dimou Konstantinos
• Zhang Xiaoxia
• Fakoorian Seyed Ali Akbar
• Akkarakaran Sony
• Khoshnevisan Mostafa
• Takeda Kazuki

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W28/18

  Negotiating wireless communication parameters · CPC title

• H04W72/044

  based on the type of the allocated resource · CPC title

• H04W72/042 Primary

  Electricity · mapped topic