Configuration for uplink transmit switching and sounding reference signal carrier switching
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information that indicates an uplink transmit switching configuration for performing uplink transmit switching between a first component carrier and a second component carrier and a sounding reference signal (SRS) carrier switching configuration for performing SRS carrier switching between the second component carrier and a third component carrier, wherein the configuration information is associated with a maximum number of allowable switches over an amount of time. The UE may transmit, based at least in part on the configuration information, one or more signals associated with performing at least one of uplink transmit switching or SRS carrier switching. Numerous other aspects are described.
1 . A user equipment (UE), comprising:
a transceiver;
one or more memories comprising instructions; and
one or more processors configured to execute the instructions to cause the UE to:
receive, via the transceiver, configuration information that indicates an uplink transmit switching configuration associated with performing uplink transmit switching between a first component carrier and a second component carrier and a sounding reference signal (SRS) carrier switching configuration associated with performing SRS carrier switching between the second component carrier and a third component carrier, wherein the configuration information is associated with a maximum number of allowable switches over an amount of time; and
transmit, via the transceiver, one or more signals associated with performing at least one of the uplink transmit switching or the SRS carrier switching.
2 . The UE of claim 1 , wherein the maximum number of allowable switches over
the amount of time is associated with a number of at least one of:
uplink transmit switches between the first component carrier and the second component carrier, or
SRS carrier switches between the second component carrier and the third component carrier, wherein an SRS carrier switch includes a radio frequency (RF) tuning time and an RF retuning time.
3 . The UE of claim 1 , wherein the maximum number of allowable switches over the amount of time is three switches.
4 . The UE of claim 3 , wherein the three switches include one uplink transmit switch and two radio frequency (RF) tunings associated with SRS carrier switching.
5 . The UE of claim 1 , wherein the amount of time is associated with a number of symbols.
6 . The UE of claim 1 , wherein the amount of time is associated with fourteen consecutive symbols.
7 . The UE of claim 1 , wherein the amount of time is associated with one slot.
8 . The UE of claim 1 , wherein the amount of time is based at least in part on a symbol duration of a component carrier, among the first component carrier, the second component carrier, or the third component carrier, with a lowest subcarrier spacing.
9 . The UE of claim 1 , wherein the maximum number of allowable switches over the amount of time is associated with a maximum number of uplink transmit switches between the first component carrier and the second component carrier over the amount of time.
10 . The UE of claim 9 , wherein the maximum number of uplink transmit switches is one.
11 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:
transmit, via the transceiver, a capability message indicating a number of switches that the UE is capable of performing over the amount of time.
12 . The UE of claim 11 , wherein the one or more processors are further configured to cause the UE to:
transmit, via the transceiver, an indication of at least one of:
a capability to support more than three switches over the amount of time, or
a capability to support two uplink transmit switches and one SRS switch over the amount of time.
13 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:
receive, via the transceiver, an indication that the third component carrier is associated with two ports for SRS carrier switching.
14 . The UE of claim 1 , wherein the configuration does not schedule
the UE to perform the uplink transmit switching while performing the SRS carrier switching within the amount of time.
15 . The UE of claim 14 , wherein the one or more processors are further configured to cause the UE to:
receive, via the transceiver, an indication that the uplink transmit switching is scheduled to occur at a same time as the SRS carrier switching; and
detect an error event based at least in part on receiving the indication that the uplink transmit switching is scheduled to occur at the same time as the SRS carrier switching.
16 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:
transmit a capability message indicating that the UE is capable of performing the uplink transmit switching while performing the SRS carrier switching.
17 . A network node, comprising:
a transceiver;
one or more memories comprising instructions; and
one or more processors configured to execute the instructions to cause the network node to:
transmit, for the UE via the transceiver, an indication of a configuration that includes an uplink transmit switching configuration associated with performing uplink transmit switching between a first component carrier of the UE and a second component carrier of the UE and a sounding reference signal (SRS) carrier switching configuration associated with performing SRS carrier switching between the second component carrier of the UE and a third component carrier of the UE, wherein the configuration is associated with a maximum number of allowable switches over an amount of time; and
receive, from the UE via the transceiver, one or more signals associated with at least one of the uplink transmit switching or the SRS carrier switching.
18 . The network node of claim 17 , wherein the configuration indicates a number of switches that the UE is to perform over the amount of time, such that the number of switches does not exceed the maximum number of allowable switches over the amount of time, wherein the switches that the UE is to perform include at least one of the uplink transmit switching or the SRS carrier switching.
19 . The network node of claim 17 , wherein the maximum number of allowable switches over the amount of time is associated with a number of at least one of:
uplink transmit switches between the first component carrier and the second component carrier, or
SRS carrier switches between the second component carrier and the third component carrier, wherein an SRS carrier switch includes a radio frequency (RF) tuning time and an RF retuning time.
20 . The network node of claim 17 , wherein the maximum number of allowable switches over the amount of time is three switches.
21 . The network node of claim 20 , wherein the three switches include one uplink transmit switch and two radio frequency (RF) tunings associated with SRS carrier switching.
22 . The network node of claim 17 , wherein the amount of time is associated with a number of symbols.
23 . The network node of claim 17 , wherein the amount of time is associated with fourteen consecutive symbols.
24 . The network node of claim 17 , wherein the amount of time is associated with one slot.
25 . The network node of claim 17 , wherein the amount of time is based at least in part on a symbol duration of a component carrier, among the first component carrier, the second component carrier, or the third component carrier, with a lowest subcarrier spacing.
26 . The network node of claim 17 , wherein the maximum number of allowable switches over the amount of time is associated with a maximum number of uplink transmit switches between the first component carrier and the second component carrier over the amount of time.
27 . The network node of claim 26 , wherein the maximum number of uplink transmit switches is one.
28 . The network node of claim 17 , wherein the one or more processors are further configured to cause the network node to:
receive, via the transceiver and from the UE, a capability message indicating a number of switches that the UE is capable of performing over the amount of time.
29 . The network node of claim 28 , wherein the configuration indicates a number of switches for the UE based at least in part on the number of switches that the UE is capable of performing over the amount of time.
30 . The network node of claim 17 , wherein the one or more processors are configured to cause the network node to:
receive, via the transceiver, an indication of at least one of:
a capability of the UE to support more than three switches over the amount of time, or
a capability of the UE to support two uplink transmit switches and one SRS switch over the amount of time.
31 . The network node of claim 17 , wherein the one or more processors are further configured to cause the network node to:
transmit, via the transceiver, an indication that the third component carrier is associated with two ports for SRS carrier switching.
32 . The network node of claim 17 , wherein the configuration does not schedule the UE to perform the uplink transmit switching while the UE is scheduled to perform the SRS carrier switching within the amount of time.
33 . The network node of claim 17 , wherein the one or more processors are further configured to cause the network node to:
receive, via the transceiver, a capability message indicating that the UE is capable of performing the uplink transmit switching while performing the SRS carrier switching.
34 . The network node of claim 17 , wherein the one or more processors are further configured to cause the network node to:
transmit, via the transceiver, an indication to schedule the UE to perform the uplink transmit switching at a same time that the UE is scheduled to perform the SRS carrier switching.
35 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving configuration information that indicates an uplink transmit switching configuration associated with performing uplink transmit switching between a first component carrier and a second component carrier and a sounding reference signal (SRS) carrier switching configuration associated with performing SRS carrier switching between the second component carrier and a third component carrier, wherein the configuration information is associated with a maximum number of allowable switches over an amount of time; and
transmitting, based at least in part on the configuration information, one or more signals associated with performing at least one of the uplink transmit switching or the SRS carrier switching.