Antenna panel switching in uplink transmissions
An uplink grant may be configured for wireless communications between a wireless device and a base station. Sounding reference signal (SRS) resource sets may be associated with one or more respective antenna panels, of a plurality of antenna panels, of the wireless device. One of a plurality of SRS resource indicators (SRI) associated with the configured uplink grant may indicate an SRS resource of an SRS resource set for transmitting a transport block. Based on deactivation of an antenna panel associated with the SRS resource set, a second transport block may be transmitted based on a second SRI of the plurality of SRIs, thus ensuring continuous uplink transmission associated with the configured uplink grant without having to indicate via configuration parameters a new SRI field associated with the configured uplink grant.
1 . A method comprising:
receiving, by a wireless device comprising a plurality of antenna panels, one or more configuration parameters indicating:
a first sounding reference signal (SRS) resource set associated with one or more first antenna panels of the plurality of antenna panels;
a second SRS resource set associated with one or more second antenna panels of the plurality of antenna panels; and
two or more SRS resource indicator (SRI) fields associated with a configured uplink grant;
based on a first SRI field, of the two or more SRI fields, indicating a first SRS resource in the first SRS resource set, transmitting a first transport block associated with the configured uplink grant;
deactivating the one or more first antenna panels associated with the first SRS resource set; and
based on a second SRI field, of the two or more SRI fields, indicating a second SRS resource in the second SRS resource set, transmitting a second transport block associated with the configured uplink grant.
2 . The method of claim 1 , wherein the transmitting the second transport block is after the deactivating of the one or more first antenna panels.
3 . The method of claim 1 , wherein the transmitting the first transport block comprises using a first antenna panel of the one or more first antenna panels.
4 . The method of claim 1 , wherein the transmitting the second transport block comprises using a second antenna panel of the one or more second antenna panels.
5 . The method of claim 1 , wherein:
the transmitting the first transport block comprises using a first spatial domain transmission filter associated with a spatial relation activated for the first SRS resource; and
the transmitting the second transport block comprises using a second spatial domain transmission filter associated with a spatial relation activated for the second SRS resource.
6 . The method of claim 1 , wherein the one or more configuration parameters indicate:
a first quantity of SRS antenna ports for one or more first SRS resources in the first SRS resource set; and
a second quantity of SRS antenna ports for one or more second SRS resources in the second SRS resource set.
7 . The method of claim 6 , wherein the first quantity of SRS antenna ports and the second quantity of SRS antenna ports are different.
8 . The method of claim 1 , wherein the one or more configuration parameters indicate a first transmit precoding field and a second transmit precoding field associated with the configured uplink grant.
9 . The method of claim 8 , wherein:
the transmitting the first transport block comprises using a first transmission precoder; and
the transmitting the second transport block comprises using a second transmission precoder.
10 . The method of claim 9 , further comprising:
determining, based on the first transmit precoding field, the first transmission precoder; and
determining, based on the second transmit precoding field, the second transmission precoder.
11 . A method comprising:
receiving, by a wireless device comprising a plurality of antenna panels, one or more configuration parameters indicating:
a first sounding reference signal (SRS) resource set associated with one or more first antenna panels of the plurality of antenna panels;
a second SRS resource set associated with one or more second antenna panels of the plurality of antenna panels; and
a SRS resource indicator (SRI) field associated with a configured uplink grant; and
transmitting a first transport block associated with the configured uplink grant using an SRS resource, indicated by the SRI field, in an SRS resource set among the first SRS resource set and the second SRS resource set, wherein the SRS resource set is:
the second SRS resource set if the one or more first antenna panels associated with the first SRS resource set are deactivated; and
the first SRS resource set if the one or more second antenna panels associated with the second SRS resource set are deactivated.
12 . The method of claim 11 , wherein the transmitting the first transport block comprises using a first antenna panel of the one or more first antenna panels.
13 . The method of claim 11 , wherein:
the transmitting the first transport block comprises using a first spatial domain transmission filter associated with a spatial relation activated for the SRS resource.
14 . A method comprising:
receiving, by a wireless device comprising a plurality of antenna panels, one or more configuration parameters indicating:
two or more sounding reference signal (SRS) resource sets, wherein each SRS resource set, of the two or more SRS resource sets, is associated with one or more respective antenna panels of the plurality of antenna panels; and
an SRS resource set field, associated with a configured uplink grant, comprising a value indicating an SRS resource set of the two or more SRS resource sets;
transmitting, based on an SRS resource in the SRS resource set, one or more transport blocks associated with the configured uplink grant;
deactivating one or more antenna panels, of the plurality of antenna panels, associated with the SRS resource set; and
based on the deactivating the one or more antenna panels, stopping transmission of transport blocks associated with the configured uplink grant.
15 . The method of claim 14 , wherein the transmitting the one or more transport blocks comprises using an antenna panel of the one or more antenna panels.
16 . The method of claim 14 , wherein the stopping transmission of transport blocks further comprises suspending transmission of transport blocks.
17 . The method of claim 16 , wherein the transmission of transport blocks are suspended until activation of at least one antenna panel of the one or more antenna panels.
18 . The method of claim 14 , wherein:
the transmitting the one or more transport blocks comprises using a spatial domain transmission filter associated with a spatial relation activated for the SRS resource.
19 . The method of claim 14 , wherein the one or more configuration parameters indicate:
a quantity of SRS antenna ports for the SRS resource in the SRS resource set.
20 . The method of claim 14 , wherein the one or more configuration parameters indicate at least a first transmit precoding field associated with the configured uplink grant.