Method and apparatus for coverage enhancement of msg3

Abstract

Methods and apparatuses for coverage enhancement of Msg3. A method for operating a user equipment includes receiving a system information block (SIB) that provides information mapping physical random access channel (PRACH) resources to enable or disable repetitions for a physical uplink shared channel (PUSCH) transmission in a random access procedure and a first time domain resource allocation (TDRA) table. An entry of the first TDRA table indicates a number of repetitions of a PUSCH transmission. The method further includes determining a PRACH resource for transmission of a PRACH, determining, based on the PRACH resource, a TDRA table from between the first TDRA table or a predetermined second TDRA table. No entry of the second TDRA table indicates a number of repetitions for a PUSCH transmission. The method further includes receiving a first grant scheduling transmission of a first PUSCH and transmitting the first PUSCH.

What is claimed is: 
     
         1 . A user equipment (UE) comprising:
 a transceiver configured to receive a system information block (SIB) that provides:
 information mapping physical random access channel (PRACH) resources to enable or disable repetitions for a physical uplink shared channel (PUSCH) transmission in a random access procedure, and 
 a first time domain resource allocation (TDRA) table, wherein an entry of the first TDRA table indicates a number of repetitions of a PUSCH transmission; and 
   a processor operably connected to a transceiver, the processor configured to:
 determine a PRACH resource for transmission of a PRACH, and 
 determine, based on the PRACH resource, a TDRA table from between first TDRA table or a predetermined second TDRA table, wherein no entry of the second TDRA table indicates a number of repetitions for a PUSCH transmission, 
   wherein the transceiver is further configured to:
 receive a first grant scheduling transmission of a first PUSCH, wherein the first grant indicates an entry of the TDRA table, and 
 transmit the first PUSCH. 
   
     
     
         2 . The UE of  claim 1 , wherein the SIB further provides an indication for a type of repetitions for a PUSCH transmission. 
     
     
         3 . The UE of  claim 1 , wherein the SIB further provides an indication for counting a number of repetitions for the first PUSCH transmission based on one of:
 a number of consecutive slots, and   a number of slots with a repetition for the first PUSCH transmission.   
     
     
         4 . The UE of  claim 1 , wherein:
 the SIB further provides an indication for:
 a first uplink (UL) bandwidth part (BWP) for a PUSCH transmission without repetitions, and 
 a second UL BWP for a PUSCH transmission with repetitions; 
   the processor is further configured to determine, based on the PRACH resource, an UL BWP from between the first UL BWP or the second UL BWP; and   the transceiver is further configured to transmit the first PUSCH in the UL BWP.   
     
     
         5 . The UE of  claim 1 , wherein:
 the SIB further provides a first reference signal received power (RSRP) value;   the transceiver is further configured to receive a reference signal (RS); and   the processor is further configured to determine:
 a second RSRP value based on the received RS, 
 the PRACH resource to be a first PRACH resource associated with enabling repetitions of the first PUSCH transmission when the second RSRP value is not larger than the first RSRP value, and 
 the PRACH resource to be a second PRACH resource associated with disabling repetitions of the first PUSCH transmission when the second RSRP value is larger than the first RSRP value. 
   
     
     
         6 . The UE of  claim 1 , wherein:
 the TDRA is the first TDRA table; and   the transceiver is further configured to transmit:
 the PRACH without repetitions, and 
 the first PUSCH with repetitions. 
   
     
     
         7 . The UE of  claim 1 , wherein the transceiver is further configured to:
 receive a second grant scheduling a retransmission of the first PUSCH, and   transmit the retransmission of the first PUSCH, wherein:
 the first grant indicates an entry of the first TDRA table, and 
 the second grant indicates an entry of the second TDRA table. 
   
     
     
         8 . A base station (BS) comprising:
 a transceiver configured to transmit a system information block (SIB) that provides:
 information mapping physical random access channel (PRACH) resources to enable or disable repetitions for a physical uplink shared channel (PUSCH) transmission in a random access procedure, and 
 a first time domain resource allocation (TDRA) table, wherein an entry of the first TDRA table indicates a number of repetitions of a PUSCH transmission; and 
   a processor operably connected to a transceiver, the processor configured to:
 determine a PRACH resource for reception of a PRACH, and 
 determine, based on the PRACH resource, a TDRA table from between the first TDRA table or a predetermined second TDRA table, wherein no entry of the second TDRA table indicates a number of repetitions for a PUSCH transmission, 
   wherein the transceiver is further configured to:
 transmit a first grant scheduling transmission of a first PUSCH, wherein the first grant indicates an entry of the TDRA table, and 
 receive the first PUSCH. 
   
     
     
         9 . The BS of  claim 8 , wherein the SIB further provides an indication for a type of repetitions for a PUSCH transmission. 
     
     
         10 . The BS of  claim 8 , wherein the SIB further provides an indication for counting a number of repetitions for the first PUSCH transmission based on one of:
 a number of consecutive slots, and   a number of slots with a repetition for the first PUSCH transmission.   
     
     
         11 . The BS of  claim 8 , wherein:
 the SIB further provides an indication for:
 a first uplink (UL) bandwidth part (BWP) for a PUSCH transmission without repetitions, and 
 a second UL BWP for a PUSCH transmission with repetitions; 
   the processor is further configured to determine, based on the PRACH resource, an UL BWP from between the first UL BWP or the second UL BWP based on the PRACH resource; and   the transceiver is further configured to receive the first PUSCH in the UL BWP.   
     
     
         12 . The BS of  claim 8 , wherein:
 the SIB further provides a first reference signal received power (RSRP) value,   the transceiver is further configured to transmit a reference signal (RS),   a second RSRP value is based on the RS,   the PRACH resource is a first PRACH resource associated with enabling repetitions of the first PUSCH transmission when the second RSRP value is not larger than the first RSRP value, and   the PRACH resource is a second PRACH resource associated with disabling repetitions of the first PUSCH transmission when the second RSRP value is larger than the first RSRP value.   
     
     
         13 . The BS of  claim 8 , wherein:
 the TDRA is the first TDRA table; and   the transceiver is further configured to receive:
 the PRACH without repetitions, and 
 the first PUSCH with repetitions. 
   
     
     
         14 . The BS of  claim 8 , wherein the transceiver is further configured to:
 transmit a second grant scheduling a retransmission of the first PUSCH, and   receive the retransmission of the first PUSCH, wherein:
 the first grant indicates an entry of the first TDRA table, and 
 the second grant indicates an entry of the second TDRA table. 
   
     
     
         15 . A method comprising:
 receiving a system information block (SIB) that provides:
 information mapping physical random access channel (PRACH) resources to enable or disable repetitions for a physical uplink shared channel (PUSCH) transmission in a random access procedure, and 
 a first time domain resource allocation (TDRA) table, wherein an entry of the first TDRA table indicates a number of repetitions of a PUSCH transmission; 
   determining a PRACH resource for transmission of a PRACH;   determining, based on the PRACH resource, a TDRA table from between the first TDRA table or a predetermined second TDRA table, wherein no entry of the second TDRA table indicates a number of repetitions for a PUSCH transmission;   receiving a first grant scheduling transmission of a first PUSCH, wherein the first grant indicates an entry of the TDRA table; and   transmitting the first PUSCH.   
     
     
         16 . The method of  claim 15 , wherein the SIB further provides an indication for a type of repetitions for a PUSCH transmission. 
     
     
         17 . The method of  claim 15 , wherein the SIB further provides an indication for counting a number of repetitions for the first PUSCH transmission based on one of:
 a number of consecutive slots, and   a number of slots with a repetition for the first PUSCH transmission.   
     
     
         18 . The method of  claim 15 , wherein:
 the SIB further provides an indication for:
 a first uplink (UL) bandwidth part (BWP) for a PUSCH transmission without repetitions, and 
 a second UL BWP for a PUSCH transmission with repetitions; 
   the method further includes determining, based on the PRACH resource, an UL BWP from between the first UL BWP or the second UL BWP; and   transmitting the first PUSCH comprises transmitting the first PUSCH in the UL BWP.   
     
     
         19 . The method of  claim 15 , wherein the SIB further provides a first reference signal received power (RSRP) value, the method further comprising:
 receiving a reference signal (RS);   determining a second RSRP value based on the received RS;   determining the PRACH resource to be a first PRACH resource associated with enabling repetitions of the first PUSCH transmission when the second RSRP value is not larger than the first RSRP value; and   determining the PRACH resource to be a second PRACH resource associated with disabling repetitions of the first PUSCH transmission when the second RSRP value is larger than the first RSRP value.   
     
     
         20 . The method of  claim 15 , wherein the TDRA is the first TDRA table, the method further comprising:
 transmitting the PRACH without repetitions, and   transmitting the first PUSCH with repetitions.