Wireless communications and control information transmission/reception
Wireless communications for control information are described. A base station may send control information to a wireless device for data scheduling and/or other operations. A portion of the control information may not be received/decoded by the wireless device and/or may not be sent by the base station. A wireless device may be configured to use a first portion of the control information for various operations such as for receiving data, for example, even if a second portion of the control information is not successfully received/decoded.
1. A method comprising:
receiving, by a wireless device, one or more radio resource control messages indicating configuration parameters for multi-stage downlink control information (DCI);
receiving first-stage DCI of the multi-stage DCI, wherein the first-stage DCI comprises:
an indication of allocated resources; and
information associated with second-stage DCI of the multi-stage DCI;
receiving, by the wireless device and via the allocated resources, data; and
determining to skip a scheduled transmission, of the wireless device, that is associated with the multi-stage DCI, wherein the skip is based on at least one of:
the information associated with the second-stage DCI indicating an absence of the second-stage DCI; or
an unsuccessful decoding of the second-stage DCI.
2. The method of claim 1 , wherein the skip is based on the information associated with the second-stage DCI indicating the absence of the second-stage DCI.
3. The method of claim 1 , further comprising:
performing, based on the information associated with the second-stage DCI, a decoding operation for the second-stage DCI, wherein the decoding operation comprises the unsuccessful decoding of the second-stage DCI, and wherein the skip is based on the unsuccessful decoding of the second-stage DCI.
4. The method of claim 1 , wherein the scheduled transmission comprises at least one of:
hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback associated with the data;
a sounding reference signal; or
channel state information (CSI) feedback associated with the multi-stage DCI.
5. The method of claim 1 , wherein the one or more radio resource control messages further indicate:
a default behavior associated with skipping the scheduled transmission; and
a search space associated with the multi-stage DCI.
6. The method of claim 1 , wherein the allocated resources comprise at least one of:
a downlink resource for a physical downlink shared channel (PDSCH); or
a resource for a sidelink.
7. The method of claim 1 , further comprising:
after the unsuccessful decoding of the second-stage DCI, successfully decoding the second-stage DCI; and
transmitting, based on the second-stage DCI, a message.
8. The method of claim 1 , further comprising:
determining to skip decoding the second-stage DCI, based on the information associated with the second-stage DCI indicating the absence of the second-stage DCI.
9. The method of claim 1 , wherein the first-stage DCI indicates at least one resource for the second-stage DCI.
10. A method comprising:
receiving, by a wireless device, one or more radio resource control messages indicating configuration parameters for multi-stage downlink control information (DCI);
receiving first-stage DCI of the multi-stage DCI, wherein the first-stage DCI comprises:
an indication of allocated resources; and
information associated with second-stage DCI of the multi-stage DCI;
receiving, by the wireless device and via the allocated resources, data;
performing, based on the information associated with the second-stage DCI, a decoding operation for the second-stage DCI; and
determining, based on the decoding operation for the second-stage DCI being unsuccessful, to skip a scheduled transmission of the wireless device.
11. The method of claim 10 , wherein the scheduled transmission comprises at least one of:
hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback associated with the data;
a sounding reference signal; or
channel state information (CSI) feedback associated with the multi-stage DCI.
12. The method of claim 10 , wherein the one or more radio resource control messages further indicate:
a default behavior associated with skipping the scheduled transmission; and
a search space associated with the multi-stage DCI.
13. The method of claim 10 , wherein the allocated resources comprise at least one of:
a downlink resource for a physical downlink shared channel (PDSCH); or
a resource for a sidelink.
14. The method of claim 10 , wherein the information associated with the second-stage DCI indicates a presence of the second-stage DCI.
15. A method comprising:
receiving, by a wireless device, one or more radio resource control messages indicating configuration parameters for multi-stage downlink control information (DCI);
receiving first-stage DCI of the multi-stage DCI, wherein the first-stage DCI comprises:
an indication of allocated resources; and
information associated with second-stage DCI of the multi-stage DCI;
receiving, by the wireless device and via the allocated resources, data;
determining, based on the information associated with the second-stage DCI, an absence of the second-stage DCI; and
determining, based on the absence of the second-stage DCI, to skip a scheduled transmission of the wireless device.
16. The method of claim 15 , wherein the scheduled transmission comprises at least one of:
hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback associated with the data;
a sounding reference signal; or
channel state information (CSI) feedback associated with the multi-stage DCI.
17. The method of claim 15 , wherein the one or more radio resource control messages further indicate:
a default behavior associated with skipping the scheduled transmission; and
a search space associated with the multi-stage DCI.
18. The method of claim 15 , wherein the allocated resources comprise at least one of:
a downlink resource for a physical downlink shared channel (PDSCH); or
a resource for a sidelink.
19. The method of claim 15 , wherein the first-stage DCI indicates at least one resource for the second-stage DCI.
20. The method of claim 15 , wherein the information associated with the second-stage DCI indicates the absence of the second-stage DCI.