CPU, resource, and port occupation for multi-TRP CSI
Certain aspects of the present disclosure provide techniques for channel state information (CSI) processing occupation determination that can be used even in multiple transmission reception point (mTRP) scenarios. A method that may be performed by a user equipment (UE) includes receiving a channel state information (CSI) reporting configuration configuring the UE with a plurality of CSI reference signal (CSI-RS) resources for channel measurement (CMRs). The method includes determining a number of occupied CSI processing units, a number of occupied active CSI resources, and/or a number of occupied active CSI-RS ports based on an actual number of CSI measurements. The method includes performing CSI measurement based on the determination.
1. A method for wireless communication by a user equipment (UE), comprising:
receiving a channel state information (CSI) reporting configuration configuring the UE with a plurality of CSI reference signal (CSI-RS) resources for channel measurement (CMRs);
determining the actual number of CSI measurements based on an indicator, wherein a codepoint of the indicator is associated with one or more CMRs of the plurality of CMRs, and each CMR of the one or more CMRs is associated with one or more codepoints of the indicator;
determining at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports based on an actual number of CSI measurements; and
performing CSI measurement based on the determination.
2. The method of claim 1 , wherein determining the at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports comprises:
determining a first at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a first frequency range; and
determining a second at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a second frequency range.
3. The method of claim 2 , wherein the first frequency range comprises a sub-6 GHz frequency range (FRI) and the second frequency range comprises a millimeter wave (mmW) frequency range (FR2).
4. The method of claim 1 , wherein the indicator comprises a CSI resource indicator (CRI) or a rank indicator (RI) pair.
5. The method of claim 1 , wherein determining the actual number of CSI measurements based on the indicator comprises:
determining, for a CMR of the plurality of CMRs, at least one of: a number of occupied CSI processing units, a number of occupied active CSI-RS resources, or a number of occupied active CSI-RS ports that the CMR is associated with based, at least in part, on a number of the one or more codepoints that the CMR is associated with.
6. The method of claim 1 , further comprising determining the actual number of CSI measurements based on a number of CSI-RS port groups and a number of transmission configuration indicator (TCI) states associated with each of the CMRs of the plurality of CMRs, wherein each CMR is associated with a number of occupied CSI processing units, a number of occupied active CSI-RS resources, and a number of occupied active CSI-RS ports.
7. The method of claim 6 , wherein determining the actual number of CSI measurements based on the number of CSI-RS port groups and the number of TCI states associated with each of the CMRs comprises determining, for each CMR of the plurality of the CMRs:
the number of occupied CSI processing units that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port-group-pairs that the CMR is associated with;
the number of occupied active CSI-RS resources that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port-group-pairs that the CMR is associated with; and
for each port within the CMR of the plurality of the CMRs, the number of occupied active CSI-RS ports that the CMR is associated with is equal to the number of CSI-RS port groups that the CMR is associated with.
8. An apparatus for wireless
communication, comprising: a memory; and
at least one processor coupled with the memory and configured to:
receive a channel state information (CSI) reporting configuration configuring the apparatus with a plurality of CSI reference signal (CSI-RS) resources for channel measurement (CMRs);
determine the actual number of CSI measurements based on an indicator, wherein a codepoint of the indicator is associated with one or more CMRs of the plurality of CMRs, and each of the one or more CMRs is associated with one or more codepoints of the indicator;
determine at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports based on an actual number of CSI measurements; and
perform CSI measurement based on the determination.
9. The apparatus of claim 8 , wherein the at least one processor being configured to determine the at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports comprises the at least one processor being configured to:
determine a first at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the apparatus operates in a first frequency range; and determine a second at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the apparatus operates in a second frequency range.
10. The apparatus of claim 9 , wherein the first frequency range comprises a sub-6 GHz frequency range (FRI) and the second frequency range comprises a millimeter wave (mmW) frequency range (FR2).
11. The apparatus of claim 8 , wherein the at least one processor is configured to determine the actual number of CSI measurements based on a number of CSI-RS port groups and a number of transmission configuration indicator (TCI) states associated with each of the CMRs of the plurality of CMRs, wherein each CMR is associated with a number of occupied CSI processing units, a number of occupied active CSI-RS resources, and a number of occupied active CSI-RS ports.
12. The apparatus of claim 11 , wherein the at least one processor being configured to determine the actual number of CSI measurements based on the number of CSI-RS port groups and the number of TCI states associated with each of the CMRs comprises the at least one processor being configured to determine, for each CMR of the plurality of the CMRs:
the number of occupied CSI processing units that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port-group-pairs that the CMR is associated with;
the number of occupied active CSI-RS resources that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port-group-pairs that the CMR is associated with; and
for each port within the CMR, the number of occupied active CSI-RS ports that the CMR is associated with is equal to the number of CSI-RS port groups that the CMR is associated with.
13. The apparatus of claim 12 , wherein the indicator comprises a CSI resource indicator (CRI) or a rank indicator (RI) pair.
14. The apparatus of claim 12 , wherein determining the actual number of CSI measurements based on the indicator comprises:
determining, for a CMR of the plurality of CMRs, at least one of: a number of occupied CSI processing units, a number of occupied active CSI-RS resources, or a number of occupied active CSI-RS ports that the CMR is associated with based, at least in part, on a number of the one or more codepoints that the CMR is associated with.
15. A method for wireless communication by a network entity, comprising:
outputting channel state information (CSI) reporting configuration configuring a user equipment (UE) with a plurality of CSI reference signal (CSI-RS) resources for channel measurement (CMRs);
determining the actual number of CSI measurements based on an indicator, wherein a codepoint of the indicator is associated with one or more CMRs of the plurality of CMRs, and each of the one or more CMRs is associated with one or more codepoints of the indicator;
determining at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports based on an actual number of CSI measurements; and
obtaining a CSI report based on the determination.
16. The method of claim 15 , wherein determining the at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports comprises:
determining a first at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a first frequency range; and
determining a second at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a second frequency range.
17. The method of claim 16 , wherein the first frequency range comprises a sub-6 GHZ frequency range (FRI) and the second frequency range comprises a millimeter wave (mmW) frequency range (FR2).
18. The method of claim 15 , wherein the indicator comprises a CSI resource indicator (CRI) or a rank indicator (RI) pair.
19. The method of claim 15 , wherein determining the actual number of CSI measurements based on the indicator comprises:
determining, for a CMR of the plurality of CMRs, at least one of: a number of occupied CSI processing units, a number of occupied active CSI-RS resources, or a number of occupied active CSI-RS ports that the CMR is associated with based, at least in part, on a number of the one or more codepoints that the CMR is associated with.
20. The method of claim 15 , further comprising determining the actual number of CSI measurements based on the number of CSI-RS port groups and a number of transmission configuration indicator (TCI) states associated with each of the CMRs of the plurality of CMRs, wherein each CMR is associated with a number of occupied CSI processing units, a number of occupied active CSI-RS resources, and a number of occupied active CSI-RS ports.
21. The method of claim 20 , wherein determining the actual number of CSI measurements based on the number of CSI-RS port groups and the number of TCI states associated with each of the CMRs comprises determining, for a CMR of the plurality of the CMRs:
the number of occupied CSI processing units that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port-group-pairs that the CMR is associated with;
the number of occupied active CSI-RS resources that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port-group-pairs that the CMR is associated with; and
for each port within the CMR of the plurality of the CMRs, the number of occupied active CSI-RS ports that the CMR is associated with is equal to the number of CSI-RS port groups that the CMR is associated with.
22. An apparatus for wireless communication,
comprising: a memory; and
at least one processor coupled with the memory and configured to:
output a user equipment (UE) a channel state information (CSI) reporting configuration configuring the UE a user equipment (UE) with a plurality of CSI reference signal (CSI-RS) resources for channel measurement (CMRs);
determine the actual number of CSI measurements based on an indicator, wherein a codepoint of the indicator is associated with one or more CMRs of the plurality of CMRs, and each CMR of the one or more CMRs is associated with one or more codepoints of the indicator;
determine at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports based on an actual number of CSI measurements; and
obtain a CSI report based on the determination.
23. The apparatus of claim 22 , wherein the indicator comprises a CSI resource indicator (CRI) or a rank indicator (RI) pair.
24. The apparatus of claim 22 , wherein the at least one processor being configured to determine the actual number of CSI measurements based on the indicator comprises the at least one processor being configured to:
determine, for a CMR of the plurality of CMRs, at least one of: a number of occupied CSI processing units, a number of occupied active CSI-RS resources, or a number of occupied active CSI-RS ports based, at least in part, on a number of the one or more codepoints that the CMR is associated with.
25. The apparatus of claim 22 , wherein the at least one processor being configured to determine the at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports comprises the at least one processor being configured to:
determine a first at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a first frequency range; and
determine a second at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a second frequency range.
26. The apparatus of claim 25 , wherein the first frequency range comprises a sub-6 GHz frequency range (FRI) and the second frequency range comprises a millimeter wave (mmW) frequency range (FR2).