Multiple panel transmissions in wireless communication systems
Methods and systems related to using multiple panels for transmission in wireless communication systems are disclosed. The described embodiments advantageously enable wireless communication systems to efficiently operate in high-frequency bands. An example method of wireless communication includes determining, by a wireless device, at least one Sounding Reference Signal (SRS) resource set configured by a network node, one of the at least one SRS resource set comprising at least one SRS resource, and transmitting, by the wireless device to the network node, a transmission based on the at least one SRS resource set.
1. A method of wireless communication, comprising:
determining, by a wireless device, at least one Sounding Reference Signal (SRS) resource set configured by a network node, wherein an SRS resource set of the at least one SRS resource set comprises at least one SRS resource; and
transmitting, by the wireless device to the network node, a transmission based on the SRS resource set,
wherein an SRS resource indicator (SRI) corresponding to the SRS resource set is determined based on a phase tracking reference signal (PTRS) port index associated with the at least one SRS resource.
2. The method of claim 1 , further comprising:
reporting, by the wireless device to the network node, at least one capability value set, at least one first parameter, or at least one second parameter,
wherein one of the at least one first parameter is comprised in or corresponds to one of the at least one capability value set, and
wherein one of the at least one second parameter corresponds to an uplink (UL) transmission or a scheduling of one or more UL transmissions.
3. The method of claim 1 , further comprising:
receiving, by the wireless device from the network node, at least one capability value set, at least one first parameter, or at least one second parameter,
wherein one of the at least one first parameter is comprised in or corresponds to one of the at least one capability value set, and
wherein one of the at least one second parameter corresponds to an uplink (UL) transmission or a scheduling of one or more UL transmissions.
4. The method of claim 2 , wherein the at least one SRS resource or the at least one SRS resource set is based on the at least one capability value set.
5. The method of claim 2 , wherein one of the at least one capability value set corresponds to one or more SRS resource sets or one or more SRS resources.
6. The method of claim 1 , further comprising at least one of:
reporting, by the wireless device to the network node, (a) at least one indication of the at least one SRS resource set or the at least one SRS resource or (b) at least one indication of a capability value set.
7. The method of claim 6 , wherein a maximum number of layers of a Physical Uplink Shared Channel (PUSCH) transmission is determined based on at least one of:
the at least one indication of the at least one SRS resource set or the at least one SRS resource,
the at least one indication of a capability value set,
a number or a maximum number of SRS ports corresponding to the at least one indication of the at least one SRS resource set or the at least one SRS resource,
a number or a maximum number of SRS ports corresponding to the at least one indication of a capability value set,
a number or a maximum number of layers corresponding to the at least one indication of the at least one SRS resource set or the at least one SRS resource,
a number or a maximum number of layers corresponding to the at least one indication of a capability value set,
a number or a maximum number of layers corresponding to a PUSCH transmission corresponding to (a) the at least one indication of a capability value set or (b) all reported or configured capability value sets.
8. The method of claim 6 , wherein one of the at least one indication of the at least one capability value set corresponds to one or a group of reported channel state information-reference signal (CSI-RS) resource indicators (CRI) or SS/PBCH block resource indicators (SSBRI) in one beam reporting.
9. The method of claim 6 , wherein one of the at least one indication of the at least one SRS resource set or the at least one SRS resource corresponds to one or a group of reported channel state information-reference signal (CSI-RS) resource indicators (CRI) or SS/PBCH block resource indicators (SSBRI) in one beam reporting.
10. The method of claim 2 , wherein the at least one first parameter comprises a parameter corresponding to a capability value set related to the at least one first parameter, and wherein the parameter is at least one of:
a number of SRS resource sets,
a number of SRS resources,
a maximum number of layers of a Physical Uplink Shared Channel (PUSCH) transmission,
a maximum number of one or more SRS resource sets configured or scheduled for a PUSCH transmission,
a maximum number of one or more SRS resources configured or scheduled for a PUSCH transmission,
a number of PTRS ports,
a full power mode indication, or
a coherent type indication.
11. The method of claim 2 , wherein the at least one second parameter comprises at least one of:
a number or a maximum number of SRS resource sets,
a number or a maximum number of SRS resources,
a number or a maximum number of layers,
a total number of ports of one or more SRS resources corresponding to a PUSCH transmission,
a maximum number of spatial relations related to one or more SRS resources corresponding to a PUSCH transmission,
a maximum number of transmission configuration indicator (TCI) states related to one or more SRS resources corresponding to a PUSCH transmission, or
a coherent type for an SRS resource or an SRS resource set corresponding to a PUSCH transmission.
12. The method of claim 1 , wherein up to a maximum of M0 of the at least one SRS resource set are configured via Radio Resource Control (RRC) signaling, and wherein M0 is an integer.
13. The method of claim 12 , wherein up to a maximum of M2 of M0 configured SRS resource sets are indicated via Downlink Control Indication (DCI) signaling, and wherein M2 is an integer less than or equal to M0.
14. The method of claim 12 , wherein up to a maximum of M1 of M0 configured SRS resource sets are activated via a Medium Access Control (MAC) Control Element (CE), wherein M1 is an integer less than or equal to M0, and wherein up to a maximum of M2 of M1 activated SRS resource sets are indicated via Downlink Control Indication (DCI) signaling, and wherein M2 is an integer less than or equal to M1.
15. The method of claim 1 , wherein:
the at least one SRS resource indicated by the SRI is associated with a same PTRS port index, or
a first PTRS port associated with a first SRS resource indicated by a first SRI is different from a second PTRS port associated with a second SRS resource indicated by a second SRI in response to the first SRI and the second SRI being configured for simultaneous transmission.
16. The method of claim 2 , further comprising:
receiving, from the network node, a control information comprising at least one field, wherein a bit size of the at least one field is based on one or more of the at least one first parameter, the at least one second parameter, or the at least one capability value set.
17. The method of claim 16 , wherein the control information comprises downlink control information (DCI) signaling, and wherein:
the at least one field comprises an SRS resource set indicator field, and wherein the bit size of the SRS resource set indicator field is set to 1 in response to panel switching being enabled, or
the at least one field comprises an SRI field, wherein the bit size of the SRI field is based on a maximum value across numbers of SRS ports for a first group of SRS resource sets with codebook or non-codebook usage in response to panel switching being enabled, and wherein the first group of SRS resource sets is determined based on (a) the at least one SRS resource set configured by the network node or (b) an indication of the at least one SRS resource set or the at least one SRS resource, or
the DCI signaling excludes more than one SRI field, more than one precoding information, more than one PTRS-demodulation reference signal (DMRS) association, or more than one transmit power control (TPC) command for a scheduled Physical Uplink Shared Channel (PUSCH) in response to panel switching being enabled, or
wherein the bit size of a second SRI field of the more than one SRI field, a second precoding information of the more than one precoding information, a second PTRS-DMRS association of the more than one PTRS-DMRS association, or a second TPC command of the more than one TPC command is zero in response to only panel switching being enabled, or
wherein the DCI signaling comprises another SRI for a codebook-based PUSCH transmission that indicates more than one SRS resource, or
wherein the DCI signaling comprises an SRS resource set indicator for a codebook-based or a non-codebook-based PUSCH transmission, and wherein the SRS resource set indicator indicates more than one SRS resource set.
18. A device for wireless communication, comprising:
a processor in a wireless device configured to:
determine at least one Sounding Reference Signal (SRS) resource set configured by a network node, wherein an SRS resource set of the at least one SRS resource set comprises at least one SRS resource; and
transmit, to the network node, a transmission based on the SRS resource set,
wherein an SRS resource indicator (SRI) corresponding to the SRS resource set is determined based on a phase tracking reference signal (PTRS) port index associated with the at least one SRS resource.