PUSCH and PRACH enhancements
A method for PUSCH repetition or PRACH aggregation. In some embodiments, the method includes transmitting, by a User Equipment (UE), in a first slot, a first Physical Uplink Shared Channel (PUSCH) transmission including a set of coded bits selected from a circular buffer of the UE based on a first redundancy version (RV); determining, by the UE, that a second slot is available for an earliest repetition of the first PUSCH transmission, the second slot being later than the slot immediately following the first slot; determining, by the UE, based on the second slot, a second redundancy version; and transmitting, by the UE, in the second slot, a second PUSCH transmission including a set of coded bits selected from the circular buffer of the UE based on the second redundancy version, the second PUSCH transmission being a repetition of the first PUSCH transmission.
1. A method, comprising:
transmitting, by a User Equipment (UE), in a first slot, a first Physical Uplink Shared Channel (PUSCH) transmission comprising a first set of coded bits selected based on a first redundancy version (RV), the first set of coded bits encoding first data;
determining, by the UE, that a second slot is available for a repetition of the first PUSCH transmission;
determining, by the UE, a second redundancy version based on the first redundancy version and based on a number of actual PUSCH transmissions corresponding to the first PUSCH transmission, the second redundancy version being different from the first redundancy version; and
transmitting, by the UE, in the second slot, the repetition of the first PUSCH transmission as a second PUSCH transmission based on the second redundancy version, such that the second PUSCH transmission comprises a second set of coded bits encoding all of the first data, the first slot and the second slot being separated by at least one downlink slot.
2. The method of claim 1 , wherein the second set of coded bits is selected based on the second redundancy version.
3. The method of claim 1 , wherein the number of PUSCH transmissions corresponding to the first PUSCH transmission is k, k being an integer greater than zero.
4. The method of claim 1 , wherein:
the repetition of the first PUSCH transmission is an earliest repetition; and
the second slot is later than the slot immediately following the first slot.
5. The method of claim 1 , wherein the second PUSCH transmission is a Type A repetition of the first PUSCH transmission.
6. The method of claim 1 , wherein the determining that the second slot is available for a repetition of the first PUSCH transmission comprises:
receiving a slot format indicator (SFI); and
determining that the second slot is a slot identified, by the SFI, as an uplink slot.
7. The method of claim 1 , wherein the determining that the second slot is available for a repetition of the first PUSCH transmission comprises:
missing a slot format indicator (SFI) having a region of applicability having a beginning and an end and comprising a plurality of slots; and
determining that the second slot occurs later than the end of the region of applicability.
8. The method of claim 1 , further comprising:
determining that no slots are available after a last scheduled PUSCH repetition and before an end of a maximum PUSCH transmission duration interval, and
not transmitting a PUSCH repetition after the last scheduled PUSCH repetition.
9. The method of claim 1 , further comprising:
receiving an indication from a network node (gNB) that a third slot is available for a PUSCH repetition;
receiving an indication from the gNB that the third slot is not available for a PUSCH repetition; and
determining that the third slot is not available for a PUSCH repetition.
10. The method of claim 1 , wherein:
the transmitting, by the UE, of the first PUSCH transmission comprises transmitting the first PUSCH transmission as a non-codebook based transmission using a first precoding matrix; and
the transmitting, by the UE, of the second PUSCH transmission comprises transmitting the second PUSCH transmission as a non-codebook based transmission using a second precoding matrix, different from the first precoding matrix.
11. The method of claim 10 , further comprising:
indicating, by the UE, using a first non-codebook based Sounding Reference Signal (SRS) instance, the first precoding matrix; and
indicating, by the UE, using a second non-codebook based Sounding Reference Signal instance, the second precoding matrix.
12. The method of claim 1 , further comprising:
sending a Physical Random Access Channel (PRACH) preamble in a first Random Access Channel (RACH) Occasion (RO); and
sending the PRACH preamble in a second RO.
13. The method of claim 12 , wherein the UE does not initiate a Random Access Response (RAR) monitoring window after sending the PRACH preamble in the first RO and before sending the PRACH preamble in the second RO.
14. A User Equipment (UE), comprising:
a processing circuit; and
a radio,
the processing circuit being configured to:
transmit, in a first slot, a first Physical Uplink Shared Channel (PUSCH) transmission comprising a first set of coded bits selected based on a first redundancy version (RV), the first set of coded bits encoding first data;
determine that a second slot is available for a repetition of the first PUSCH transmission;
determine, a second redundancy version based on the first redundancy version and based on a number of actual PUSCH transmissions corresponding to the first PUSCH transmission, the second redundancy version being different from the first redundancy version; and
transmit, in the second slot, the repetition of the first PUSCH transmission as a second PUSCH transmission based on the second redundancy version, such that the second PUSCH transmission comprises a second set of coded bits encoding all of the first data, the first slot and the second slot being separated by at least one downlink slot.
15. The UE of claim 14 , wherein the second PUSCH transmission is a Type A repetition of the first PUSCH transmission.
16. The UE of claim 14 , wherein the determining that the second slot is available for a repetition of the first PUSCH transmission comprises:
receiving a slot format indicator (SFI); and
determining that the second slot is a slot identified, by the SFI, as an uplink slot.
17. The UE of claim 14 , wherein the determining that the second slot is available for a repetition of the first PUSCH transmission comprises:
missing a slot format indicator (SFI) having a region of applicability having a beginning and an end and comprising a plurality of slots; and
determining that the second slot occurs later than the end of the region of applicability.
18. The UE of claim 14 , wherein the processing circuit is further configured to:
determine that no slots are available after a last scheduled PUSCH repetition and before an end of a maximum PUSCH transmission duration interval, and
not transmit a PUSCH repetition after the last scheduled PUSCH repetition.
19. The UE of claim 14 , wherein the processing circuit is further configured to:
receive an indication from a network node (gNB) that a third slot is available for a PUSCH repetition;
receive an indication from the gNB that the third slot is not available for a PUSCH repetition; and
determine that the third slot is not available for a PUSCH repetition.
20. A User Equipment (UE), comprising:
means for processing; and
a radio,
the means for processing being configured to:
transmit, in a first slot, a first Physical Uplink Shared Channel (PUSCH) transmission comprising a first set of coded bits selected based on a first redundancy version (RV), the first set of coded bits encoding first data;
determine that a second slot is available for a repetition of the first PUSCH transmission;
determine, a second redundancy version based on the first redundancy version and based on a number of actual PUSCH transmissions corresponding to the first PUSCH transmission, the second redundancy version being different from the first redundancy version; and
transmit, in the second slot, the repetition of the first PUSCH transmission as a second PUSCH transmission based on the second redundancy version, such that the second PUSCH transmission comprises a second set of coded bits encoding all of the first data, the first slot and the second slot being separated by at least one downlink slot.