Collision mitigation procedures for grant-less uplink multiple access
A wireless transmit/receive unit (WTRU) may receive configuration information for a first set of resources and a second set of resources for a grantless physical uplink shared channel (PUSCH) transmission. The WTRU may determine data for transmission using the grantless PUSCH transmission. Based on the data, the WTRU may select resources from the first set or the second set for the grantless PUSCH transmission. Further, the WTRU may send the grantless PUSCH transmission including the data using the selected resources. In an example, the sending of the grantless PUSCH transmission may be part of a random access procedure. The random access procedure may be a two-step random access procedure. The random access procedure may be a random access channel (RACH) procedure. The random access procedure may depend upon a double contention pool setting, and the setting may address at least one of a data pool or a control pool.
1. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
receiving first configuration information for a first set of resources for a grantless physical uplink shared channel (PUSCH) transmission and second configuration information for a second set of resources for the grantless PUSCH transmission;
determining data for transmission using the grantless PUSCH transmission;
based on the data, selecting resources from either only the first set of resources for the grantless PUSCH transmission or only the second set of resources for the grantless PUSCH transmission, wherein the data is associated with at least the first set of resources; and
sending the grantless PUSCH transmission including the data using the selected resources.
2. The method of claim 1 , wherein the sending of the grantless PUSCH transmission is part of a random access procedure.
3. The method of claim 2 , wherein the random access procedure is a two-step random access procedure.
4. The method of claim 2 , wherein the random access procedure is a random access channel (RACH) procedure.
5. The method of claim 2 , wherein the random access procedure depends upon collision conditions.
6. The method of claim 1 , wherein the first configuration information and the second configuration information are received in one or more broadcast messages.
7. The method of claim 1 , wherein the first configuration information and the second configuration information are received in one or more radio resource control messages.
8. The method of claim 1 , wherein the first set of resources and the second set of resources each have contiguous resources.
9. The method of claim 1 , wherein the first set of resources and the second set of resources are separated in at least one of time or frequency.
10. The method of claim 1 , wherein a preamble is transmitted prior to the grantless PUSCH, wherein the transmitted preamble is based on the selected resources from the first set of resources or from the second set of resources.
11. A wireless transmit/receive unit (WTRU) comprising:
a transceiver; and
a processor operatively coupled to the transceiver; wherein:
the transceiver is configured to receive first configuration information for a first set of resources for a grantless physical uplink shared channel (PUSCH) transmission and second configuration information for a second set of resources for the grantless PUSCH transmission;
the processor is configured to determine data for transmission using the grantless PUSCH transmission;
the processor is configured to select, based on the data, resources from either only the first set of resources for the grantless PUSCH transmission or only the second set of resources for the grantless PUSCH transmission, wherein the data is associated with at least the first set of resources; and
the transceiver is configured to send the grantless PUSCH transmission including the data using the selected resources.
12. The WTRU of claim 11 , wherein the sending of the grantless PUSCH transmission is part of a random access procedure.
13. The WTRU of claim 12 , wherein the random access procedure is a two-step random access procedure.
14. The WTRU of claim 12 , wherein the random access procedure is a random access channel (RACH) procedure.
15. The WTRU of claim 12 , wherein the random access procedure depends upon collision conditions.
16. The WTRU of claim 11 , wherein the first configuration information and the second configuration information are received in one or more broadcast messages.
17. The WTRU of claim 11 , wherein the first configuration information and the second configuration information are received in one or more radio resource control messages.
18. The WTRU of claim 11 , wherein the first set of resources and the second set of resources each have contiguous resources.
19. The WTRU of claim 11 , wherein the first set of resources and the second set of resources are separated in at least one of time or frequency.
20. The WTRU of claim 11 , wherein a preamble is transmitted prior to the grantless PUSCH, wherein the transmitted preamble is based on the selected resources from the first set of resources or from the second set of resources.