Techniques and apparatuses for control information determination for payloads with leading zeroes
Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a communication that includes downlink control information (DCI), wherein a size of the DCI affects a cyclic redundancy check (CRC) value associated with the communication; and determine the DCI or the size of the DCI based at least in part on the CRC value. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a communication that includes downlink control information (DCI),
wherein a size of the DCI affects a cyclic redundancy check (CRC) value associated with the communication, and
wherein the size of the DCI is based on a payload, including any leading zeros of the payload of the DCI; and
determining the DCI or the size of the DCI based at least in part on the CRC value.
2. The method of claim 1 , wherein the communication is coded using polar coding.
3. The method of claim 1 , wherein a register for the CRC is initialized using at least one non-zero value.
4. The method of claim 1 , wherein a value is prepended or appended to a payload of the DCI for calculation of the CRC value.
5. The method of claim 4 , wherein the value is based at least in part on the size of the DCI.
6. The method of claim 1 , wherein a CRC mask for determining the CRC value is generated based at least in part on the size of the DCI.
7. The method of claim 1 , wherein the size of the DCI includes at least one bit of the CRC value.
8. The method of claim 1 , wherein the size of the DCI does not include the CRC value.
9. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receive a communication that includes downlink control information (DCI),
wherein a size of the DCI affects a cyclic redundancy check (CRC) value associated with the communication, and
wherein the size of the DCI is based on a payload, including any leading zeros of the payload of the DCI; and
determine the DCI or the size of the DCI based at least in part on the CRC value.
10. The UE of claim 9 , wherein the communication is encoded using polar coding.
11. The UE of claim 9 , wherein a register for the CRC is initialized using at least one non-zero value.
12. The UE of claim 9 , wherein a value is prepended or appended to a payload of the DCI for calculation of the CRC value.
13. The UE of claim 12 , wherein the value is based at least in part on the size of the DCI.
14. The UE of claim 9 , wherein a CRC mask for determining the CRC value is generated based at least in part on the size of the DCI.
15. The UE of claim 9 , wherein the size of the DCI includes at least one bit of the CRC value.
16. The UE of claim 9 , wherein the size of the DCI does not include the CRC value.
17. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to:
receive a communication that includes downlink control information (DCI),
wherein a size of the DCI affects a cyclic redundancy check (CRC) value associated with the communication, and
wherein the size of the DCI is based on a payload, including any leading zeros of the payload of the DCI; and
determine the DCI or the size of the DCI based at least in part on the CRC value.
18. The non-transitory computer-readable medium of claim 17 , wherein the communication is encoded using polar coding.
19. The non-transitory computer-readable medium of claim 17 , wherein a register for the CRC is initialized using at least one non-zero value.
20. The non-transitory computer-readable medium of claim 17 , wherein a value is prepended or appended to a payload of the DCI for calculation of the CRC value.
21. The non-transitory computer-readable medium of claim 20 , wherein the value is based at least in part on the size of the DCI.
22. The non-transitory computer-readable medium of claim 17 , wherein a CRC mask for determining the CRC value is generated based at least in part on the size of the DCI.
23. The non-transitory computer-readable medium of claim 17 , wherein the size of the DCI includes at least one bit of the CRC value.
24. The non-transitory computer-readable medium of claim 17 , wherein the size of the DCI does not include the CRC value.
25. An apparatus for wireless communication, comprising:
means for receiving a communication that includes downlink control information (DCI),
wherein a size of the DCI affects a cyclic redundancy check (CRC) value associated with the communication, and
wherein the size of the DCI is based on a payload, including any leading zeros of the payload of the DCI; and
means for determining the DCI or the size of the DCI based at least in part on the CRC value.
26. The apparatus of claim 25 , wherein the communication is encoded using polar coding.
27. The apparatus of claim 25 , wherein a register for the CRC is initialized using at least one non-zero value.
28. The apparatus of claim 25 , wherein a value is prepended or appended to a payload of the DCI for calculation of the CRC value.
29. The apparatus of claim 28 , wherein the value is based at least in part on the size of the DCI.
30. The apparatus of claim 25 , wherein a CRC mask for determining the CRC value is generated based at least in part on the size of the DCI.