Content for  TS 38.321  Word version:  18.3.0

The Multiple Entry PHR with assumed PUSCH MAC CE is identified by a MAC subheader with eLCID as specified in Table 6.2.1-2. It has a variable size, and includes the bitmap, a Type 2 PH field , an octet containing the associated P_CMAX,f,c field (if reported) and an octet containing the associated P_CMAX,f,c field for assumed PUSCH (if reported) for SpCell of the other MAC entity; a Type 1 PH field, an octet containing the associated P_CMAX,f,c field (if reported) and an octet containing the associated P_CMAX,f,c field for assumed PUSCH (if reported) for the PCell. It further includes, in ascending order based on the ServCellIndex, one or multiple of Type X PH fields, octets containing the associated P_CMAX,f,c fields (if reported) and octets containing the associated P_CMAX,f,c fields for assumed PUSCH (if reported) for Serving Cells other than PCell indicated in the bitmap. X is either 1 or 3 according to TS 38.213 and TS 36.213. The presence of Type 2 PH field for SpCell of the other MAC entity is configured by phr-Type2OtherCell with value true. A single octet C_i bitmap is used for indicating the presence of PH per Serving Cell when the highest ServCellIndex of Serving Cell with configured uplink is less than 8, otherwise four octets are used. The length of the E_k bitmap is based on the total number of Serving Cells, i.e. Serving Cells for which C_i field set to 1 and PCell. A single octet E_k bitmap is included if the total number of Serving Cells is greater than 0 and less than 9; a two octets E_k bitmap is included if the total number of Serving Cells is greater than 8 and less than 17; a three octets E_k bitmap is included if the total number of Serving Cells is greater than 16 and less than 25; a four octets E_k bitmap is included if the total number of Serving Cells is greater than 24; E_k bitmap is not included if the total number of Serving Cells is zero. The MAC entity determines whether PH value for an activated Serving Cell is based on real transmission or a reference format by considering the configured grant(s) and downlink control information which has been received until and including the PDCCH occasion in which the first UL grant for a new transmission that can accommodate the MAC CE for PHR as a result of LCP as defined in clause 5.4.3.1 is received since a PHR has been triggered if the PHR MAC CE is reported on an uplink grant received on the PDCCH or until the first uplink symbol of PUSCH transmission minus PUSCH preparation time as defined in clause 7.7 of TS 38.213 if the PHR MAC CE is reported on a configured grant. For a band combination in which the UE does not support dynamic power sharing, the UE may omit the octets containing Power Headroom field and P_CMAX,f,c field for Serving Cells in the other MAC entity except for the PCell in the other MAC entity and the reported values of Power Headroom and P_CMAX,f,c for the PCell are up to UE implementation. The PHR MAC CEs are defined as follows:

• C_i: This field indicates the presence of a PH field for the Serving Cell with ServCellIndex i as specified in TS 38.331. The C_i field set to 1 indicates that a PH field for the Serving Cell with ServCellIndex i is reported. The C_i field set to 0 indicates that a PH field for the Serving Cell with ServCellIndex i is not reported;
• E_k: This field indicates the presence of a P_CMAX,f,c for assumed PUSCH field of the k^th Serving Cell. The Serving Cells for which C_i field is set to 1 and PCell are indexed sequentially starting with PCell and followed by other Serving cells in ascending order of ServCellIndex i as specified in TS 38.331. The Ek field set to 1 indicates that a PCMAX,f,c for assumed PUSCH field for the k^th Serving Cell is reported. The E_k field set to 0 indicates that a P_CMAX,f,c for assumed PUSCH field for the k^th Serving Cell is not reported. For the E-UTRA Serving Cell, the corresponding E_k field is set to 0;
• R: Reserved bit, set to 0;
• V: This field indicates if the PH value is based on a real transmission or a reference format. For Type 1 PH, the V field set to 0 indicates real transmission on PUSCH and the V field set to 1 indicates that a PUSCH reference format is used. For Type 2 PH, the V field set to 0 indicates real transmission on PUCCH and the V field set to 1 indicates that a PUCCH reference format is used. For Type 3 PH, the V field set to 0 indicates real transmission on SRS and the V field set to 1 indicates that an SRS reference format is used. Furthermore, for Type 1, Type 2, and Type 3 PH, the V field set to 0 indicates the presence of the octet containing the associated P_CMAX,f,c field and the MPE field, and the V field set to 1 indicates that the octet containing the associated P_CMAX,f,c field and the MPE field is omitted;
• Power Headroom (PH): This field indicates the power headroom level. The length of the field is 6 bits. The reported PH and the corresponding power headroom levels are shown in Table 6.1.3.8-1 (the corresponding measured values in dB for the NR Serving Cell are specified in TS 38.133 while the corresponding measured values in dB for the E-UTRA Serving Cell are specified in TS 36.133);
• P: If mpe-Reporting-FR2 is configured and the Serving Cell operates on FR2, the MAC entity shall set this field to 0 if the applied P-MPR value, to meet MPE requirements, as specified in TS 38.101-2, is less than P-MPR_00 as specified in TS 38.133 and to 1 otherwise. If mpe-Reporting-FR2 is not configured or the Serving Cell operates on FR1, this field indicates whether power backoff is applied due to power management (as allowed by P-MPRc as specified in TS 38.101-1, TS 38.101-2, and TS 38.101-3). The MAC entity shall set the P field to 1 if the corresponding P_CMAX,f,c field would have had a different value if no power backoff due to power management had been applied;
• P_CMAX,f,c: If present, this field indicates the P_CMAX,f,c (as specified in TS 38.213) for the NR Serving Cell and the P_CMAX,c or P̃_CMAX,c (as specified in TS 36.213) for the E-UTRA Serving Cell used for calculation of the preceding PH field. The reported P_CMAX,f,c and the corresponding nominal UE transmit power levels are shown in Table 6.1.3.8-2 (the corresponding measured values in dBm for the NR Serving Cell are specified in TS 38.133 while the corresponding measured values in dBm for the E-UTRA Serving Cell are specified in TS 36.133);
• P_CMAX,f,c for assumed PUSCH: If present, this field indicates the P_CMAX,f,c for assumed PUSCH(as specified in TS 38.213) for the NR Serving Cell. The reported P_CMAX,f,c and the corresponding nominal UE transmit power levels are shown in [Table 6.1.3.8-2] (the corresponding measured values in dBm for the NR Serving Cell are specified in TS 38.133;
• MPE: If mpe-Reporting-FR2 is configured, and the Serving Cell operates on FR2, and if the P field is set to 1, this field indicates the applied power backoff to meet MPE requirements, as specified in TS 38.101-2. This field indicates an index to Table 6.1.3.8-3 and the corresponding measured values of P-MPR levels in dB are specified in TS 38.133. The length of the field is 2 bits. If mpe-Reporting-FR2 is not configured, or if the Serving Cell operates on FR1, or if the P field is set to 0, R bits are present instead.

The enhanced SP CSI reporting on PUCCH Activation/Deactivation MAC CE is identified by a MAC subheader with eLCID as specified in Table 6.2.1-1b. It has a variable size and consists of the following fields:

• Serving Cell ID: This field indicates the identity of the Serving Cell for which the MAC CE applies. The length of the field is 5 bits;
• BWP ID: This field indicates a UL BWP for which the MAC CE applies as the codepoint of the DCI bandwidth part indicator field as specified in TS 38.212. The length of the BWP ID field is 2 bits;
• S_i: This field indicates the activation/deactivation status of the Semi-Persistent CSI report configuration within csi-ReportConfigToAddModList, as specified in TS 38.331. S0 refers to the report configuration which includes PUCCH resources for SP CSI reporting in the indicated BWP and has the lowest CSI-ReportConfigId within the list with type set to semiPersistentOnPUCCH, S1 to the report configuration which includes PUCCH resources for SP CSI reporting in the indicated BWP and has the second lowest CSI-ReportConfigId and so on. If the number of report configurations within the list with type set to semiPersistentOnPUCCH in the indicated BWP is less than i + 1, MAC entity shall ignore the S_i field. The S_i field is set to 1 to indicate that the corresponding Semi-Persistent CSI report configuration shall be activated. The S_i field is set to 0 to indicate that the corresponding Semi-Persistent CSI report configuration i shall be deactivated;
• N_i,x: this field indicates the activation/deactivation status of the Semi-Persistent CSI report sub-configuration x within csi-ReportSubConfigToAddModList of CSI-ReportConfigId i, as specified in TS 38.331. If S_i set to 1, the octet corresponding to N_i,0 to N_i,7 is present. If S_i set to 0, the octet corresponding to N_i,0 to N_i,7 is not present. N_0,0 refers to the report sub-configuration which has the lowest csi-ReportSubConfigID within the list, N_0,1 to the report sub-configuration which has the second lowest csi-ReportSubConfigID and so on. If the number of report sub-configurations within the list with type set to csi-ReportSubConfigToAddModList in the indicated BWP is less than x + 1, the MAC entity shall ignore the N_i,x field. The N_i,x field is set to 1 to indicate that the corresponding Semi-Persistent CSI report sub-configuration x shall be activated. The N_i,x field is set to 0 to indicate that the corresponding Semi-Persistent CSI report sub-configuration x shall be deactivated;
• R: Reserved bit, set to 0.

The Enhanced Single Entry PHR for multiple TRP STx2P MAC CE is identified by a MAC subheader with eLCID as specified in Table 6.2.1-2b. The two PHs together with two P_CMAX,f,c,k for the Serving Cell are reported if UE is configured with twoPHRMode and multipanelSchemeSDM or multipanelSchemeSFN, as specified in clause 5.4.6. It has a fixed size and consists of four octets defined as follows (Figure 6.1.3.81-1):

• R: Reserved bit, set to 0;
• Power Headroom k (PH k): This field indicates the power headroom level for k = 1, 2, where PH 1 is associated with the first TCI-State or TCI-UL-State for a real or reference PUSCH transmission and PH 2 is associated with the second TCI-State or TCI-UL-State for a real or reference PUSCH transmission, as specified in clause 7.7.1 of TS 38.213. PH fields for a Serving Cell are included in ascending order based on k. The length of the field is 6 bits. The reported PH and the corresponding power headroom levels are shown in Table 6.1.3.8-1 (the corresponding measured values in dB are specified in TS 38.133);
• P_k: If mpe-Reporting-FR2 is configured and the Serving Cell operates on FR2, the MAC entity shall set this field to 0 if the applied P-MPR value associated with P_CMAX,f,c,k, to meet MPE requirements, as specified in TS 38.101-2, is less than P-MPR_00 as specified in TS 38.133 and to 1 otherwise. If mpe-Reporting-FR2 is not configured or the Serving Cell operates on FR1, this field indicates whether power backoff is applied due to power management (as allowed by P-MPRc as specified in TS 38.101-1, TS 38.101-2, and TS 38.101-3). The MAC entity shall set the P_k field to 1 if the corresponding P_CMAX,f,c,k field would have had a different value if no power backoff due to power management had been applied;
• V_k: This field indicates if the PH value for the corresponding TRP is based on a real transmission or a reference format for PH k. For Type 1 PH, the V_k field set to 0 indicates real transmission on PUSCH and the V_k field set to 1 indicates that a PUSCH reference format is used;
• P_CMAX,f,c,k: This field indicates the configured transmitted power P_CMAX,f,c,k (as specified in TS 38.213) used for calculation of the preceding PH k field. The reported P_CMAX,f,c,k and the corresponding nominal UE transmit power levels are shown in Table 6.1.3.8-2 (the corresponding measured values in dBm are specified in TS 38.133);
• MPE_k: If mpe-Reporting-FR2 is configured, and the Serving Cell operates on FR2, and if the P_k field is set to 1, this field indicates the applied power backoff to meet MPE requirements, as specified in TS 38.101-2. This field indicates an index to Table 6.1.3.8-3 and the corresponding measured values of P-MPR levels in dB are specified in TS 38.133. The length of the field is 2 bits. If mpe-Reporting-FR2 is not configured, or if the Serving Cell operates on FR1, or if the P_k field is set to 0, R bits are present instead.

The Enhanced Multiple Entry PHR for multiple TRP STx2P MAC CE is identified by a MAC subheader with eLCID as specified in Table 6.2.1-2b. It has a variable size, and includes the bitmaps, a Type 2 PH field and an octet containing the associated P_CMAX,f,c field (if reported) for SpCell of the other MAC entity, one or multiple Type 1 PH fields and one or multiple octets containing the associated P_CMAX,f,c,k fields (if reported) for the PCell. It further includes, in ascending order based on the ServCellIndex, one or multiple of Type 1 PH fields and one or multiple octets containing the associated P_CMAX,f,c,k fields (if reported) or one Type 3 PH field with one octet containing the associated P_CMAX,f,c field (if reported) for Serving Cells other than PCell indicated in the bitmap for indicating the presence of PH(s). The presence of Type 2 PH field for SpCell of the other MAC entity is configured by phr-Type2OtherCell with value true. A single octet bitmap is used for indicating the presence of PH(s) per Serving Cell when the highest ServCellIndex of Serving Cell with configured uplink is less than 8, otherwise four octets are used. The MAC entity determines whether PH value for an activated Serving Cell is based on real transmission or a reference format by considering the configured grant(s) and downlink control information which has been received until and including the PDCCH occasion in which the first UL grant for a new transmission that can accommodate the MAC CE for PHR as a result of LCP as defined in clause 5.4.3.1 is received since a PHR has been triggered if the PHR MAC CE is reported on an uplink grant received on the PDCCH or until the first uplink symbol of PUSCH transmission minus PUSCH preparation time as defined in clause 7.7 of TS 38.213 if the PHR MAC CE is reported on a configured grant. For a band combination in which the UE does not support dynamic power sharing, the UE may omit the octets containing Power Headroom field and P_CMAX,f,c,k field for Serving Cells in the other MAC entity except for the PCell in the other MAC entity and the reported values of Power Headroom and P_CMAX,f,c,k for the PCell are up to UE implementation. The two PHs together with two P_CMAX,f,c,k for the Serving Cell configured with multipanelSchemeSDM or multipanelSchemeSFN are reported if the MAC entity is configured with twoPHRMode, as specified in clause 5.4.6. The Enhanced Multiple Entry PHR for multiple TRP STx2P MAC CEs are defined as follows:

• Ci: This field indicates the presence of PH field(s) for the Serving Cell with ServCellIndex i as specified in TS 38.331. The Ci field set to 1 indicates that PH field(s) for the Serving Cell with ServCellIndex i is reported. The Ci field set to 0 indicates that a PH field for the Serving Cell with ServCellIndex i is not reported;
• R: Reserved bit, set to 0;
• V_k: This field indicates if the PH k value is based on a real transmission or a reference format for k = 1, 2. For Type 1 PH, the V_k field set to 0 indicates real transmission on PUSCH and the V_k field set to 1 indicates that a PUSCH reference format is used. For Type 2 PH, the V_k field set to 0 indicates real transmission on PUCCH and the V_k field set to 1 indicates that a PUCCH reference format is used; For Type 3 PH, the V_k field set to 0 indicates real transmission on SRS and the V_k field set to 1 indicates that an SRS reference format is used. Furthermore, for type 1 PH of a reported Serving Cell not configured with multipanelSchemeSDM or multipanelSchemeSFN, the V_k field set to 0 indicates the presence of the octet containing the associated P_CMAX,f,c,k field and the MPE_k field, and the V_k field set to 1 indicates that the octet containing the associated P_CMAX,f,c,k field and MPE_k field is omitted; for Type 2, and Type 3 PH, the V_k field set to 0 indicates the presence of the octet containing the associated P_CMAX,f,c,k field and the MPE_k field, and the V_k field for the Serving Cell set to 1 indicates that the octet containing the associated P_CMAX,f,c,k field and the MPE_k field is omitted;
• Power Headroom k (PH k): This field indicates the power headroom level. For PHR with twoPHRmode, if the Serving cell is configured with multipanelSchemeSFN or multipanelSchemeSDM, PH 1 is associated with the first TCI-State or TCI-UL-State for a real or reference PUSCH transmission and PH 2 is associated with the second TCI-State or TCI-UL-State for a real or reference PUSCH transmission, as specified in clause 7.7.1 of TS 38.213; if the Serving cell is configured with multiple TRP PUSCH repetition, PH 1 is associated with the SRS-ResourceSet with a lower srs-ResourceSetId and PH 2 is associated with the SRS-ResourceSet with a higher srs-ResourceSetId. PH fields for a Serving Cell are included in ascending order based on k. The length of the field is 6 bits. The reported PH and the corresponding power headroom levels are shown in Table 6.1.3.8-1 (the corresponding measured values in dB for the NR Serving Cell are specified in TS 38.133 while the corresponding measured values in dB for the E-UTRA Serving Cell are specified in TS 36.133);
• P_k: If mpe-Reporting-FR2 is configured and the Serving Cell operates on FR2, the MAC entity shall set this field to 0 if the applied P-MPR value associated with P_CMAX,f,c,k, to meet MPE requirements, as specified in TS 38.101-2, is less than P-MPR_00 as specified in TS 38.133 and to 1 otherwise. If mpe-Reporting-FR2 is not configured or the Serving Cell operates on FR1, this field indicates whether power backoff is applied due to power management (as allowed by P-MPRc as specified in TS 38.101-1, TS 38.101-2, and TS 38.101-3). The MAC entity shall set the P_k field to 1 if the corresponding P_CMAX,f,c,k field would have had a different value if no power backoff due to power management had been applied;
• P_CMAX,f,c, P_CMAX,f,c,k: If present, this field indicates the configured transmitted power P_CMAX,f,c,k (as specified in TS 38.213) for the NR Serving Cell and the P_CMAX,c or P̃_CMAX,c (as specified in TS 36.213) for the E-UTRA Serving Cell used for calculation of the preceding PH k field. For the SpCell of the other MAC entity and a reported Serving Cell not configured with multipanelSchemeSDM or multipanelSchemeSFN, P_CMAX,f,c is presented (i.e., the index k is omitted). The reported P_CMAX,f,c,k and the corresponding nominal UE transmit power levels are shown in Table 6.1.3.8-2 (the corresponding measured values in dBm for the NR Serving Cell are specified in TS 38.133 while the corresponding measured values in dBm for the E-UTRA Serving Cell are specified in TS 36.133);
• MPE_k: If mpe-Reporting-FR2 is configured, and the Serving Cell operates on FR2, and if the P_k field is set to 1, this field indicates the applied power backoff to meet MPE requirements, as specified in TS 38.101-2. This field indicates an index to Table 6.1.3.8-3 and the corresponding measured values of P-MPR levels in dB are specified in TS 38.133. The length of the field is 2 bits. If mpe-Reporting-FR2 is not configured, or if the Serving Cell operates on FR1, or if the P_k field is set to 0, R bits are present instead.

The Aggregated SP Positioning SRS Activation/Deactivation MAC CE is identified by a MAC subheader with eLCID as specified in Table 6.2.1-1b. It has a variable size with following fields:

• Positioning SRS Aggregation ID: This field indicates one of the combinations of linked Positioning SRS Resource Sets corresponding to SRS-PosResourceSetAggBW-CombinationList or SRS-PosRRC-AggBW-InactiveConfigList specified in TS 38.331. Value 0 corresponds to the first entry within the list SRS-PosResourceSetAggBW-CombinationList or SRS-PosRRC-AggBW-InactiveConfigList; value 1 corresponds to the second entry within the list SRS-PosResourceSetAggBW-CombinationList or SRS-PosRRC-AggBW-InactiveConfigList and so on;
• C₁, C₂, C₃: These fields indicate the activation/deactivation status of each Positioning SRS Resource Set that is linked for SRS for positioning bandwidth aggregation configured in PosResourceSetLinkedForAggBW-List or SRS-InactivePosResourceSetLinkedForAggBW-List specified in TS 38.331. C₁ corresponds to the first entry in PosResourceSetLinkedForAggBW-List or SRS-InactivePosResourceSetLinkedForAggBW-List, C₂ corresponds to the second one and so on. The C_i field is set to 1 to indicate that the Positioning SRS Resource Set corresponding to C_i shall be activated. The C_i field is set to 0 to indicate that the Positioning SRS Resource Set corresponding to C_i shall be de-activated;
• S: This field indicates whether the fields Spatial Relation for Resource ID_i are present. If the field is set to 1, the fields Spatial Relation for Resource ID_i are present; otherwise, they are absent;
• Spatial Relation for Resource ID_i: The field Spatial Relation for Resource ID_i is only present if MAC CE is used for activation, i.e. at least one of the C₁, C₂, and C₃ is set to 1. There can be as many as 16 entries of Spatial Relation for Resource ID_i depending on the RRC configuration. There are 4 types of Spatial Relation for Resource ID_i, which is indicated by the F (F0 and F1) field within, defined as in Figure 6.1.3.36-2 to Figure 6.1.3.36-5 in clause 6.1.3.36. Spatial Relation for Resource ID_i corresponds to the spatial relation of the ith SRS resource of the SRS resources within the first activated carrier indicated by the fields C1, C2 and C3, that is aggregated with SRS resources from the other aggregated carriers according to TS 38.214;
• C: This field indicates whether the octets containing Resource Serving Cell ID field(s) and Resource BWP ID field(s) within the field Spatial Relation for Resource ID_i are present, except for Spatial Relation Resource ID_i with DL-PRS or SSB. If the combination of the linked SRS resource sets is configured by the field SRS-PosResourceSetAggBW-CombinationList and this field is set to 1, the octets containing Resource Serving Cell ID field(s) and Resource BWP ID field(s) in the field Spatial Relation for Resource ID_i are present, otherwise if this field is set to 0, they are not present; if the combination of the linked SRS resource sets is configured by the field SRS-PosRRC-AggBW-InactiveConfigList, this field shall be set to 0 and the octets containing Resource Serving Cell ID field(s) and Resource BWP ID field(s) in the field Spatial Relation for Resource ID_i are not present;
• R: Reserved bit, set to 0.