Techniques for dynamic cell activation and deactivation in wireless communications
Methods, systems, and devices for wireless communications are described that provide for dynamic cell activation and deactivation. A network entity may configure one or more cells for dynamic activation and deactivation, and a UE may provide information to the network entity to allow efficient scheduling and cell activation and deactivation. A UE may provide a capability indication of support for dynamic cell activation and deactivation, along with information such as supported switching times, supported rates of activation and deactivation, a number of cells that can be activated and deactivated, or any combinations thereof. In some cases, a UE may provide UE assistance information to the network, such as in configured periodic reporting, in aperiodic reporting that is activated based on a trigger from the network, in response to a network request, or any combinations thereof.
1 . A method for wireless communication at a user equipment (UE), comprising:
receiving configuration information for communications via a set of multiple cells, wherein at least a first cell of the set of multiple cells is configured for dynamic cell activation or deactivation for communications with the UE based at least in part on control information received at the UE;
transmitting, via a UE assistance information message, an indication of a UE capability associated with the dynamic cell activation or deactivation of at least the first cell and an indication of one or more cell IDs for one or more cells that are requested for dynamic cell activation or deactivation;
receiving a downlink control information communication that indicates for the UE to perform an activation or a deactivation of the first cell in accordance with the UE capability and in accordance with the one or more cell IDs requested for dynamic cell activation or deactivation indicated via the UE assistance information message including an ID of the first cell; and
communicating with a network entity via the set of multiple cells based at least in part on the dynamic cell activation or deactivation indicated by the downlink control information communication.
2 . The method of claim 1 , wherein the transmitting the indication of the UE capability comprises:
transmitting a capability indication communication that indicates the dynamic cell activation or deactivation is supported at the UE.
3 . The method of claim 2 , wherein the transmitting the indication of the UE capability further comprises:
transmitting, with the capability indication communication, one or more of a cell activation timing that is supported at the UE, a cell deactivation timing that is supported at the UE, a minimum time duration for which one or more cells should be active or inactive, a quantity of cells on which dynamic cell activation or deactivation is supported, or any combinations thereof.
4 . The method of claim 1 , wherein the indication of the UE capability is provided for one or more secondary cells that are configured for communication at the UE, a primary cell that is configured for communication at the UE, or any combinations thereof.
5 . The method of claim 1 , wherein the transmitting the indication of the UE capability via the UE assistance information message comprises:
transmitting the UE assistance information message associated with dynamic cell activation or deactivation via uplink control information via a medium access control (MAC) control element, via a physical uplink shared channel (PUSCH) payload, or via both.
6 . The method of claim 1 , wherein the UE assistance information message is transmitted based at least in part on a reporting configuration that provides for periodic or aperiodic UE capability reports, a request received from a network entity, or any combinations thereof.
7 . The method of claim 1 , wherein the UE assistance information message indicates a rate at which cell activation or deactivation is supported by the UE.
8 . The method of claim 1 , wherein the UE assistance information message indicates one or more of a first time duration for which one or more cells are requested to stay active after activation, a second time duration for which one or more cells are requested to stay inactive after deactivation, or any combinations thereof.
9 . The method of claim 1 , wherein the UE assistance information message indicates one or more of a minimum or maximum quantity of cells on which dynamic cell activation or deactivation is requested.
10 . The method of claim 1 , wherein the downlink control information communication indicates for the UE to perform an activation or a deactivation of one or more transmission-reception points (TRPs).
11 . The method of claim 10 , wherein the one or more TRPs are identified based at least in part on a cell ID, a control resource set (CORESET) pool index, a TRP index, or any combinations thereof.
12 . A method for wireless communication at a network entity, comprising:
transmitting, to a user equipment (UE), configuration information for communications via a set of multiple cells, wherein at least a first cell of the set of multiple cells is configured for dynamic cell activation or deactivation for communications with the UE based at least in part on control information received at the UE;
receiving, from the UE via a UE assistance information message, an indication of a UE capability associated with the dynamic cell activation or deactivation of at least the first cell and an indication of one or more cell IDs for one or more cells that are requested for dynamic cell activation or deactivation;
transmitting a downlink control information communication that indicates for the UE to perform an activation or a deactivation of the first cell in accordance with the UE capability and in accordance with the one or more cell IDs requested for dynamic cell activation or deactivation indicated via the UE assistance information message including an ID of the first cell; and
communicating with the UE via the set of multiple cells based at least in part on the dynamic cell activation or deactivation indicated by the downlink control information communication.
13 . The method of claim 12 , wherein the receiving the indication of the UE capability comprises:
receiving a capability indication communication that indicates the dynamic cell activation or deactivation is supported at the UE.
14 . The method of claim 13 , wherein the receiving the indication of the UE capability further comprises:
receiving, with the capability indication communication, one or more of a cell activation timing that is supported at the UE, a cell deactivation timing that is supported at the UE, a minimum time duration for which one or more cells should be active or inactive, a quantity of cells on which dynamic cell activation or deactivation is supported, or any combinations thereof.
15 . The method of claim 12 , wherein the indication of the UE capability is provided for one or more secondary cells that are configured for the UE, a primary cell that is configured for the UE, or any combinations thereof.
16 . The method of claim 12 , wherein the receiving the indication of the UE capability via the UE assistance information message comprises:
receiving the UE assistance information message associated with dynamic cell activation or deactivation via uplink control information via a medium access control (MAC) control element, via a physical uplink shared channel (PUSCH) payload, or via both.
17 . The method of claim 12 , wherein the UE assistance information message is received based at least in part on a reporting configuration that provides for periodic or aperiodic UE capability reports, a request transmitted from the network entity, or any combinations thereof.
18 . The method of claim 12 , wherein the UE assistance information message indicates a rate at which cell activation or deactivation is supported by the UE.
19 . The method of claim 12 , wherein the UE assistance information message indicates one or more of a first time duration for which one or more cells are requested to stay active after activation, a second time duration for which one or more cells are requested to stay inactive after deactivation, or any combinations thereof.
20 . The method of claim 12 , wherein the UE assistance information message indicates one or more of a minimum or maximum quantity of cells on which dynamic cell activation or deactivation is requested.
21 . The method of claim 12 , wherein the downlink control information communication indicates for the UE to perform an activation or a deactivation of one or more transmission-reception points (TRPs).
22 . The method of claim 21 , wherein the one or more TRPs are identified based at least in part on a cell ID, a control resource set (CORESET) pool index, a TRP index, or any combinations thereof.
23 . An apparatus for wireless communication at a user equipment (UE), comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive configuration information for communications via a set of multiple cells, wherein at least a first cell of the set of multiple cells is configured for dynamic cell activation or deactivation for communications with the UE based at least in part on control information received at the UE;
transmit, via a UE assistance information message, an indication of a UE capability associated with the dynamic cell activation or deactivation of at least the first cell and an indication of one or more cell IDs for one or more cells that are requested for dynamic cell activation or deactivation;
receive a downlink control information communication that indicates for the UE to perform an activation or a deactivation of the first cell in accordance with the UE capability and in accordance with the one or more cell IDs requested for dynamic cell activation or deactivation indicated via the UE assistance information message including an ID of the first cell; and
communicate with a network entity via the set of multiple cells based at least in part on the dynamic cell activation or deactivation indicated by the downlink control information communication.
24 . The apparatus of claim 23 , wherein the instructions to transmit the indication of the UE capability are executable by the processor to cause the apparatus to:
transmit a capability indication communication that indicates the dynamic cell activation or deactivation is supported at the UE; and
transmit, with the capability indication communication, one or more of a cell activation timing that is supported at the UE, a cell deactivation timing that is supported at the UE, a minimum time duration for which one or more cells should be active or inactive, a quantity of cells on which dynamic cell activation or deactivation is supported, or any combinations thereof.
25 . The apparatus of claim 23 , wherein the instructions to transmit the indication of the UE capability via the UE assistance information message are executable by the processor to cause the apparatus to:
transmit the UE assistance information message associated with dynamic cell activation or deactivation via uplink control information via a medium access control (MAC) control element, via a physical uplink shared channel (PUSCH) payload, or via both.
26 . An apparatus for wireless communication at a network entity, comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
transmit, to a user equipment (UE), configuration information for communications via a set of multiple cells, wherein at least a first cell of the set of multiple cells is configured for dynamic cell activation or deactivation for communications with the UE based at least in part on control information received at the UE;
receive, from the UE via a UE assistance information message, an indication of a UE capability associated with the dynamic cell activation or deactivation of at least the first cell and an indication of one or more cell IDs for one or more cells that are requested for dynamic cell activation or deactivation;
transmit a downlink control information communication that indicates for the UE to perform an activation or a deactivation of the first cell in accordance with the UE capability and in accordance with the one or more cell IDs requested for dynamic cell activation or deactivation indicated via the UE assistance information message including an ID of the first cell; and
communicate with the UE via the set of multiple cells based at least in part on the dynamic cell activation or deactivation indicated by the downlink control information communication.
27 . The apparatus of claim 26 , wherein the instructions to receive the indication of the UE capability are executable by the processor to cause the apparatus to:
receive a capability indication communication that indicates the dynamic cell activation or deactivation is supported at the UE; and
receive, with the capability indication communication, one or more of a cell activation timing that is supported at the UE, a cell deactivation timing that is supported at the UE, a minimum time duration for which one or more cells should be active or inactive, a quantity of cells on which dynamic cell activation or deactivation is supported, or any combinations thereof.
28 . The apparatus of claim 26 , wherein the instructions to receive the indication of the UE capability via the UE assistance information message are executable by the processor to cause the apparatus to:
receive the UE assistance information message associated with dynamic cell activation or deactivation via uplink control information via a medium access control (MAC) control element, via a physical uplink shared channel (PUSCH) payload, or via both.