Beam management procedures in radio systems
A wireless device receives, from a base station, one or more messages comprising configuration parameters indicating a sounding reference signal (SRS) resource set. A downlink control information is received. The downlink control information comprising an SRS resource indicator (SRI) and an uplink transmission configuration indicator (UL-TCI). The SRI indicates one or more SRS resources of the SRS resource set. In response to the UL-TCI being equal to a predefined value, a determination is made of an uplink spatial domain transmission filter based on the one or more SRS resources of the SRS resource set. A transport block with the uplink spatial domain transmission filter is transmitted via a physical uplink shared channel.
1. A method comprising:
receiving, by a wireless device from a base station, one or more messages comprising configuration parameters indicating:
a sounding reference signal (SRS) resource set;
a plurality of reference signals (RSs); and
an uplink transmission configuration indication (TCI) state comprising a configuration of one or more RSs of the plurality of RSs;
receiving a downlink control information comprising an SRS resource indicator (SRI) and an uplink TCI indicator (UL-TCI), wherein:
the SRI indicates one or more SRS resources of the SRS resource set; and
the UL-TCI indicates the uplink transmission configuration indication state;
in response to the UL-TCI being equal to a predefined value, determining an uplink spatial domain transmission filter based on the one or more SRS resources of the SRS resource set; and
transmitting, via a physical uplink shared channel, a transport block with the uplink spatial domain transmission filter.
2. The method of claim 1 , further comprising:
receiving a second downlink control information comprising a second SRI and a second UL-TCI, wherein the second SRI indicates one or more second SRS resources of the SRS resource set;
in response to the second UL-TCI not being equal to the predefined value, determining a second uplink spatial domain transmission filter based on the second UL-TCI; and
transmitting, via the physical uplink shared channel, a second transport block with the second uplink spatial domain transmission filter.
3. The method of claim 1 , further comprising determining, based on the one or more RSs of the plurality of RSs and in response to the UL-TCI not being equal to the predefined value, a second uplink spatial domain transmission filter.
4. The method of claim 3 , further comprising transmitting, via the physical uplink shared channel and with the second uplink spatial domain transmission filter, the transport block.
5. The method of claim 1 , wherein each SRS resource of the SRS resource set is configured with a spatial relation reference signal (RS).
6. The method of claim 5 , wherein the spatial relation RS comprises at least one of:
a channel station information reference signal (CSI-RS);
a synchronization block (SSB); or
a sounding reference signal (SRS).
7. The method of claim 1 , wherein the determining the uplink spatial domain transmission filter based on the one or more SRS resources comprises determining the uplink spatial domain transmission filter based on a latest transmission of the one or more SRS resources.
8. The method of claim 1 , wherein the SRI comprises a different bit field from the UL-TCI in the downlink control information.
9. The method of claim 1 , wherein the determining the uplink spatial domain transmission filter based on the one or more SRS resources comprises determining the uplink spatial domain transmission filter that is the same as an uplink spatial domain transmission filter used for a transmission of the one or more SRS resources.
10. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from a base station, one or more messages comprising configuration parameters indicating:
a sounding reference signal (SRS) resource set;
a plurality of reference signals (RSs); and
an uplink transmission configuration indication (TCI) state comprising a configuration of one or more RSs of the plurality of RSs;
receive a downlink control information comprising an SRS resource indicator (SRI) and an uplink TCI indicator (UL-TCI), wherein:
the SRI indicates one or more SRS resources of the SRS resource set; and
the UL-TCI indicates the uplink transmission configuration indication state;
in response to the UL-TCI being equal to a predefined value, determine an uplink spatial domain transmission filter based on the one or more SRS resources of the SRS resource set; and
transmit, via a physical uplink shared channel, a transport block with the uplink spatial domain transmission filter.
11. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
receive a second downlink control information comprising a second SRI and a second UL-TCI, wherein the second SRI indicates one or more second SRS resources of the SRS resource set;
in response to the second UL-TCI not being equal to the predefined value, determine a second uplink spatial domain transmission filter based on the second UL-TCI; and
transmit, via the physical uplink shared channel, a second transport block with the second uplink spatial domain transmission filter.
12. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine, based on the one or more RSs of the plurality of RSs and in response to the UL-TCI not being equal to the predefined value, a second uplink spatial domain transmission filter.
13. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit, via the physical uplink shared channel and with the second uplink spatial domain transmission filter, the transport block.
14. The wireless device of claim 10 , wherein each SRS resource of the SRS resource set is configured with a spatial relation reference signal (RS).
15. The wireless device of claim 14 , wherein the spatial relation RS comprises at least one of:
a channel station information reference signal (CSI-RS);
a synchronization block (SSB); or
a sounding reference signal (SRS).
16. The wireless device of claim 10 , wherein the determination of the uplink spatial domain transmission filter based on the one or more SRS resources comprises determining the uplink spatial domain transmission filter based on a latest transmission of the one or more SRS resources.
17. The wireless device of claim 10 , wherein the SRI comprises a different bit field from the UL-TCI in the downlink control information.
18. A system comprising:
a base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit one or more messages comprising configuration parameters indicating:
a sounding reference signal (SRS) resource set;
a plurality of reference signals (RSs); and
an uplink transmission configuration indication (TCI) state comprising a configuration of one or more RSs of the plurality of RSs; and
transmit a downlink control information comprising an SRS resource indicator (SRI) and an uplink TCI indicator (UL-TCI), wherein:
the SRI indicates one or more SRS resources of the SRS resource set; and
the UL-TCI indicates the uplink transmission configuration indication state; and
a wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive the one or more messages;
receive the downlink control information;
in response to the UL-TCI being equal to a predefined value, determine an uplink spatial domain transmission filter based on the one or more SRS resources of the SRS resource set; and
transmit, via a physical uplink shared channel, a transport block with the uplink spatial domain transmission filter.