Shared data channel design
Systems, methods and instrumentalities are disclosed for decoding data. For example, it may be determined, in a current slot, whether data received in a previous slot is decoded successfully. The data received in the previous slot may be included in a Physical Downlink Shared Channel (PDSCH). If the data received in the previous slot is not decoded successfully, preemptive multiplexing information may be detected in a first search space. The data received in the previous slot may be decoded, for example, using detected preemptive multiplexing information. The preemptive multiplexing information may be of a current slot. The preemptive multiplexing information may be comprised in a first DCI. A second search space of the current slot may be searched. For example, the second search space may be searched for a second DCI. The first DCI and the second DCI may be different.
1. A wireless transmit/receive unit (WTRU), comprising:
a processor configured to:
monitor for a first downlink control information (DCI) in a first search space of a first slot, wherein the first DCI has a first format and is associated with a first radio network temporary identifier (RNTI);
monitor for a second DCI in a second search space of a second slot, wherein the second DCI has a second format and is associated with a second RNTI;
if the second DCI is detected in the second search space of the second slot, determine, based on the second DCI, that a region in a previous allocation to the WTRU does not carry data for the WTRU, wherein the previous allocation is associated with a previous transmission to the WTRU; and
decode data associated with the previous transmission using information associated with the first DCI.
2. The WTRU of claim 1 , wherein the previous transmission to the WTRU is in a previous slot.
3. The WTRU of claim 1 , wherein the processor is further configured to monitor for a third DCI in a third search space of the second slot, wherein the third DCI includes scheduling information for a transmission intended for the WTRU in a current slot, and wherein the third DCI is associated with the first RNTI.
4. The WTRU of claim 3 , wherein the second search space and the third search space do not overlap.
5. The WTRU of claim 3 , wherein the second search space and the third search space overlap.
6. The WTRU of claim 3 , wherein the second search space is a common search space and the third search space is in a WTRU-specific search space.
7. The WTRU of claim 3 , wherein the second DCI has a first size and the third DCI has a second size, and wherein the second size is greater than the first size.
8. The WTRU of claim 3 , wherein the first RNTI and the second RNTI are different.
9. The WTRU of claim 1 , wherein the region in the previous allocation comprises at least one of resource blocks or symbols.
10. A method implemented in a wireless transmit/receive unit (WTRU) associated with decoding data, the method comprising:
monitoring for a first downlink control information (DCI) in a first search space of a first slot, wherein the first DCI has a first format and is associated with a first radio network temporary identifier (RNTI);
monitoring for a second DCI in a second search space of a second slot, wherein the second DCI has a second format and is associated with a second RNTI;
if the second DCI is detected in the second search space of the second slot, determining, based on the second DCI, that a region in a previous allocation to the WTRU does not carry data for the WTRU, wherein the previous allocation is associated with a previous transmission to the WTRU; and
decoding data associated with the previous transmission using information associated with the first DCI.
11. The method of claim 10 , further comprising monitoring for a third DCI in a third search space of the second slot, wherein the third DCI includes scheduling information for a transmission intended for the WTRU in a current slot, wherein the third DCI is associated with the first RNTI, and wherein the first RNTI and the second RNTI are different.
12. The method of claim 11 , wherein the second search space and the third search space do not overlap or the second search space and the third search space overlap.
13. The method of claim 11 , wherein the second search space is a common search space and the third search space is in a WTRU-specific search space.
14. The method of claim 11 , wherein the second DCI has a first size and the third DCI has a second size, and wherein the second size is greater than the first size.
15. The method of claim 11 , wherein the previous transmission to the WTRU is in a previous slot.