Method and apparatus for generating power headroom report in a wireless communication system
A method and apparatus are disclosed. In an example, a User Equipment (UE) triggers a first Power Headroom Report (PHR). The UE receives one or more uplink grants indicative of a first Physical Uplink Shared Channel (PUSCH) and a second PUSCH on a second serving cell, wherein the first PUSCH at least partially overlaps with the second PUSCH in time domain. The UE selects the first PUSCH, from among the first PUSCH and the second PUSCH, based on one or more first characteristics of the first PUSCH and/or one or more second characteristics of the second PUSCH. The UE determines the first PHR for the second serving cell based on the first PUSCH. The UE transmits a PHR Medium Access Control (MAC) Control Element (CE), include the first PHR, to a network node that configured the UE to report one PHR for one serving cell.
1 . A method for a User Equipment (UE), the method comprising:
triggering a first Power Headroom Report (PHR);
receiving one or more uplink grants indicative of a first Physical Uplink Shared Channel (PUSCH) and a second PUSCH on a first serving cell, wherein the first PUSCH at least partially overlaps with the second PUSCH in time domain with the same starting symbol;
selecting the first PUSCH for determining the first PHR for the first serving cell, from among the first PUSCH and the second PUSCH, based on at least one of one or more first characteristics of the first PUSCH or one or more second characteristics of the second PUSCH; and
transmitting a PHR Medium Access Control (MAC) Control Element (CE) comprising the first PHR.
2 . The method of claim 1 , wherein:
the UE does not support reporting two PHRs for one serving cell.
3 . The method of claim 1 , wherein:
the first PUSCH is scheduled via at least one of a first beam or a first Transmission Configuration Indicator (TCI) state;
the second PUSCH is scheduled via at least one of a second beam or a second TCI state; and
at least one of the first beam is different than the second beam or the first TCI state is different than the second TCI state.
4 . The method of claim 1 , wherein:
the first PUSCH is associated with a first UE panel; and
the second PUSCH is associated with a second UE panel different than the first UE panel.
5 . The method of claim 1 , wherein:
transmitting the PHR MAC CE is performed on a second first serving cell.
6 . The method of claim 1 , wherein:
transmitting the PHR MAC CE is performed in a first slot;
the first PUSCH at least partially overlaps with the first slot; and
the second PUSCH at least partially overlaps with the first slot.
7 . The method of claim 6 , comprising:
receiving one or more second uplink grants indicative of a third PUSCH and a fourth PUSCH on a third serving cell, wherein the third PUSCH and the fourth PUSCH are separated in time domain;
selecting the third PUSCH from among the third PUSCH and the fourth PUSCH; and
determining a second PHR for the third serving cell based on the third PUSCH,
wherein at least one of:
the third PUSCH at least partially overlaps with the first slot, the fourth PUSCH at least partially overlaps with the first slot, and the third PUSCH is selected from among the third PUSCH and the fourth PUSCH based on the third PUSCH being earlier than the fourth PUSCH; or
the third PUSCH is selected from among the third PUSCH and the fourth PUSCH based on the third PUSCH at least partially overlapping with the first slot.
8 . The method of claim 1 , wherein at least one of:
the one or more first characteristics comprise a first Control Resource Set (CORESET) pool index of a first CORESET for a first Downlink Control Information (DCI) scheduling the first PUSCH;
the one or more second characteristics comprise a second CORESET pool index of a second CORESET for a second DCI scheduling the second PUSCH;
the one or more first characteristics comprise a first Transmission/Reception Point (TRP)-related index associated with the first PUSCH;
the one or more second characteristics comprise a second TRP-related index associated with the second PUSCH;
the first PUSCH is selected from among the first PUSCH and the second PUSCH based on the first TRP-related index being lower than the second TRP-related index;
the one or more first characteristics comprise a first Sounding Reference Signal (SRS) resource set index associated with the first PUSCH;
the one or more second characteristics comprise a second SRS resource set index associated with the second PUSCH;
the first PUSCH is selected from among the first PUSCH and the second PUSCH based on the first SRS resource set index being lower than the second SRS resource set index;
the one or more first characteristics comprise a first serving cell Physical Cell Identity (PCI) associated with a first Transmission Configuration Indicator (TCI) state associated with the first PUSCH;
the one or more second characteristics comprise a second serving cell PCI associated with a second TCI state associated with the second PUSCH;
the first PUSCH is selected from among the first PUSCH and the second PUSCH based on the first TCI state corresponding to a defined TCI state; or
the method comprises receiving a beam indication DCI associated with activating at least one of the first TCI state associated with the first PUSCH or the second TCI state associated with the second PUSCH.
9 . The method of claim 8 , wherein:
a second MAC CE is indicative of the first TCI state and the second TCI state; and
at least one of:
the second MAC CE is used to associate a TCI state field in the beam indication DCI to one or more TCI states;
the first TCI state associated with the first PUSCH is indicated via one first octet of the second MAC CE;
the second TCI state associated with the second PUSCH is indicated via one second octet of the second MAC CE; or
an identifier of the one first octet is lower than an identifier of the one second octet.
10 . A method for a network node, the method comprising:
receiving a capability information from a User Equipment (UE), wherein the capability information indicates the UE supports concurrent uplink (UL) transmission; and
configuring the UE with a first concurrent UL transmission on a first serving cell, wherein:
the first serving cell is configured in a second cell group;
the second cell group has a configuration for reporting multiple Power Headroom Reports (PHRs) for one serving cell; and
the network node is not allowed to configure the UE with the first serving cell in a cell group that does not have a configuration for reporting multiple PHRs for one serving cell.
11 . The method of claim 10 , comprising:
based on the UE being configured with the first concurrent UL transmission on the first serving cell, not configuring the UE with the first serving cell in a cell group that does not have a configuration for reporting multiple PHRs for one serving cell.
12 . The method of claim 10 , wherein:
based on the UE being configured with the first concurrent UL transmission on the first serving cell, the network node is not allowed to configure the UE with the first serving cell in a cell group that does not have a configuration for reporting multiple PHRs for one serving cell.
13 . The method of claim 10 , wherein at least one of:
the first serving cell is configured in the second cell group that has the configuration for reporting multiple PHRs for one serving cell based on the UE supporting concurrent UL transmission; or
regardless of whether or not the UE supports reporting multiple PHRs for one serving cell, the network node is not allowed to configure the UE with the first serving cell in a cell group that does not have a configuration for reporting multiple PHRs for one serving cell.
14 . A method for a User Equipment (UE), the method comprising:
triggering a first Power Headroom Report (PHR);
receiving a Medium Access Control (MAC) Control Element (CE) indicating association between a code-point of a TCI state field in a Downlink Control Information (DCI) to one or more Transmission Configuration Indicator (TCI) states comprising a first TCI state and a second TCI state, wherein:
the first TCI state is indicated via one first octet of the MAC CE;
the second TCI state is indicated via one second octet of the MAC CE; and
an identifier of the one first octet is lower than an identifier of the one second octet;
receiving a beam indication DCI scheduling downlink assignment and indicating the code-point;
receiving one or more uplink grants indicative of a first Physical Uplink Shared Channel (PUSCH) and a second PUSCH on a first serving cell, wherein the first PUSCH at least partially overlaps with the second PUSCH in time domain with the same starting symbol, and the first PUSCH is associated with the first TCI state and the second PUSCH is associated with the second TCI state;
based upon the UE not being configured to report two PHRs, selecting the first PUSCH for determining the first PHR for the first serving cell, from among the first PUSCH and the second PUSCH, based on the first TCI state corresponding to a TCI state, associated with the code-point, that is in octet with lower identifier; and
transmitting a PHR Medium Access Control (MAC) Control Element (CE) comprising the first PHR.
15 . The method of claim 14 , wherein:
the UE does not support reporting two PHRs for one serving cell.
16 . The method of claim 14 , wherein:
the first PUSCH is associated with a first UE panel; and
the second PUSCH is associated with a second UE panel different than the first UE panel.
17 . The method of claim 14 , wherein:
transmitting the PHR MAC CE is performed on a second serving cell.
18 . The method of claim 14 , wherein:
transmitting the PHR MAC CE is performed in a first slot;
the first PUSCH at least partially overlaps with the first slot; and
the second PUSCH at least partially overlaps with the first slot.
19 . The method of claim 18 , comprising:
receiving one or more second uplink grants indicative of a third PUSCH and a fourth PUSCH on a third serving cell, wherein the third PUSCH and the fourth PUSCH are separated in time domain; and
selecting the third PUSCH from among the third PUSCH and the fourth PUSCH.
20 . The method of claim 19 , comprising:
determining a second PHR for the third serving cell based on the third PUSCH,
wherein at least one of:
the third PUSCH at least partially overlaps with the first slot, the fourth PUSCH at least partially overlaps with the first slot, and the third PUSCH is selected from among the third PUSCH and the fourth PUSCH based on the third PUSCH being earlier than the fourth PUSCH; or
the third PUSCH is selected from among the third PUSCH and the fourth PUSCH based on the third PUSCH at least partially overlapping with the first slot.