Method and apparatus for receiving downlink data in a wireless communication system

Abstract

In an example, a User Equipment (UE) monitors a first Physical Downlink Control Channel (PDCCH), via a first spatial Quasi-Colocation (QCL) assumption associated with a first Transmission Configuration Indicator (TCI) state, on a first monitoring occasion of a first Control Resource Set (CORESET). The UE monitors a second PDCCH, via a second spatial QCL assumption associated with a second TCI state, on a second monitoring occasion of a second CORESET. The UE determines an interval between a reference monitoring occasion and a scheduled Physical Downlink Shared Channel (PDSCH), wherein the reference monitoring occasion is a last monitoring occasion of the first monitoring occasion and the second monitoring occasion. Based on the interval being larger than or equal to a threshold, the UE receives the scheduled PDSCH via a third spatial QCL assumption associated with a third TCI state, wherein the third TCI state is determined based on a lowest CORESET identity of a first CORESET identity of the first CORESET and a second CORESET identity of the second CORESET.

1 . A method of a User Equipment (UE), the method comprising:
 determining an interval between a last orthogonal frequency-division multiplexing (OFDM) symbol of a reference monitoring occasion and a starting OFDM symbol of a scheduled Physical Downlink Shared Channel (PDSCH), wherein the reference monitoring occasion is a last monitoring occasion of (i) a first monitoring occasion of a first Control Resource Set (CORESET) and (ii) a second monitoring occasion of a second CORESET; and   based on the interval being larger than or equal to a threshold, receiving the scheduled PDSCH via a first spatial Quasi-Colocation (QCL) assumption associated with a first Transmission Configuration Indicator (TCI) state, wherein the first TCI state is determined based on a lowest CORESET identity of a first CORESET identity of the first CORESET and a second CORESET identity of the second CORESET.   
     
     
         2 . The method of  claim 1 , wherein at least one of:
 the threshold is associated with determining whether or not to use a default beam of a default TCI state for reception of a PDSCH; or   the threshold is timeDurationForQCL.   
     
     
         3 . The method of  claim 1 , wherein at least one of:
 a second TCI state is activated for receiving the first CORESET;   the first CORESET is not configured with tci-PresentInDCI;   tci-PresentInDCI is not enabled for the first CORESET;   a third TCI state is activated for receiving the second CORESET;   the second CORESET is not configured with tci-PresentInDCI; or   tci-PresentInDCI is not enabled for the second CORESET.   
     
     
         4 . The method of  claim 1 , wherein the scheduled PDSCH is scheduled by a first Physical Downlink Control Channel (PDCCH) and a second PDCCH. 
     
     
         5 . The method of  claim 1 , wherein at least one of:
 the method comprises receiving a signal indicative of a first search space, comprising a first Physical Downlink Control Channel (PDCCH), and a second search space comprising a second PDCCH; or   based on an association of the first search space and the second search space, the first PDCCH and the second PDCCH are associated with scheduling the scheduled PDSCH.   
     
     
         6 . The method of  claim 1 , wherein:
 the first monitoring occasion and the second monitoring occasion are in a first slot.   
     
     
         7 . The method of  claim 6 , comprising:
 monitoring one or more Physical Downlink Control Channels (PDCCHs), associated with one or more CORESETs, in a second slot, wherein the second slot is different than the first slot and the second slot is a most recent slot in which the UE monitors PDCCH before receiving the scheduled PDSCH.   
     
     
         8 . The method of  claim 7 , wherein:
 the one or more CORESETs comprise a third CORESET with a lowest CORESET identity among one or more CORESET identities of the one or more CORESETs.   
     
     
         9 . The method of  claim 8 , wherein:
 the one or more CORESETs comprise one or more second CORESETs other than the first CORESET and the second CORESET.   
     
     
         10 . The method of  claim 1 , wherein:
 the first monitoring occasion of the first CORESET is in a downlink Bandwidth Part (BWP) on a serving cell; and   the second monitoring occasion of the second CORESET is in the downlink BWP on the serving cell.   
     
     
         11 . The method of  claim 10 , wherein at least one of:
 the UE is configured with a first search space and a second search space in the downlink BWP;   the first monitoring occasion of the first CORESET is associated with the first search space; or   the second monitoring occasion of the second CORESET is associated with the second search space.   
     
     
         12 . A method of a User Equipment (UE), the method comprising:
 determining an interval between a last orthogonal frequency-division multiplexing (OFDM) symbol of a reference monitoring occasion and a starting OFDM symbol of a Physical Downlink Shared Channel (PDSCH), wherein the PDSCH is scheduled by a first Physical Downlink Control Channel (PDCCH) and a second PDCCH; and   based on the interval being larger than or equal to a threshold, receiving the PDSCH via a first spatial Quasi-Colocation (QCL) assumption associated with a first Transmission Configuration Indicator (TCI) state, wherein the first TCI state is determined based on a lowest Control Resource Set (CORESET) identity of a first CORESET identity and a second CORESET identity.   
     
     
         13 . The method of  claim 12 , wherein:
 the first PDCCH is associated with at least one of a first monitoring occasion or a first Control Resource Set (CORESET); and   the second PDCCH is associated with at least one of a second monitoring occasion or a second CORESET.   
     
     
         14 . The method of  claim 12 , wherein the reference monitoring occasion is a last monitoring occasion of (i) a first monitoring occasion of a first Control Resource Set (CORESET) and (ii) a second monitoring occasion of a second CORESET. 
     
     
         15 . The method of  claim 14 , wherein:
 the first monitoring occasion and the second monitoring occasion are in a first slot.   
     
     
         16 . The method of  claim 15 , comprising:
 monitoring one or more PDCCHs, associated with one or more CORESETs, in a second slot, wherein the second slot is different than the first slot and the second slot is a most recent slot in which the UE monitors PDCCH before receiving the PDSCH.   
     
     
         17 . The method of  claim 16 , wherein:
 the one or more CORESETs comprise a third CORESET with a lowest CORESET identity among one or more CORESET identities of the one or more CORESETs.   
     
     
         18 . The method of  claim 17 , wherein:
 the one or more CORESETs comprise one or more second CORESETs other than the first CORESET and the second CORESET.   
     
     
         19 . The method of  claim 14 , wherein:
 the first monitoring occasion is in a downlink Bandwidth Part (BWP) on a serving cell; and   the second monitoring occasion is in the downlink BWP on the serving cell.   
     
     
         20 . A User Equipment (UE), comprising:
 a control circuit;   a processor installed in the control circuit; and   a memory installed in the control circuit and operatively coupled to the processor, wherein the processor is configured to execute a program code stored in the memory to perform operations, the operations comprising:
 determining an interval between a last orthogonal frequency-division multiplexing (OFDM) symbol of a reference monitoring occasion and a starting OFDM symbol of a scheduled Physical Downlink Shared Channel (PDSCH), wherein the reference monitoring occasion is a last monitoring occasion of (i) a first monitoring occasion of a first Control Resource Set (CORESET) and (ii) a second monitoring occasion of a second CORESET; and 
 based on the interval being larger than or equal to a threshold, receiving the scheduled PDSCH via a first spatial Quasi-Colocation (QCL) assumption associated with a first Transmission Configuration Indicator (TCI) state, wherein the first TCI state is determined based on a lowest CORESET identity of a first CORESET identity of the first CORESET and a second CORESET identity of the second CORESET.