Radio code block transmission based on DCI extension
A method in a wireless device is provided. The method includes: receiving a downlink signal, wherein the downlink signal includes a Physical Downlink Control Channel (PDCCH) and a Physical downlink Shared Channel (PDSCH), the PDCCH having first downlink Control Information (DCI) indicating at least second downlink control information (DCI) in the PDSCH; and performing one of encoding and decoding user data in the PDSCH based on the first DCI and second DCI. A wireless device implementing this method is provided as well.
1. A method in a wireless device comprising:
receiving a downlink signal, the downlink signal comprising a Physical Downlink Control Channel (PDCCH) and a Physical downlink Shared Channel (PDSCH), the PDCCH having first downlink Control Information (DCI) indicating at least second downlink control information (DCI) in the PDSCH;
performing one of encoding and decoding user data in the PDSCH based on the first DCI and second DCI the first DCI comprising a Modulation and Coding Scheme, MCS, field which has 5 bits, and the 3 bits of the MCS field being used to indicate a ratio of resource elements, RE, used for the second DCI over an effective RE number in allocated Physical Resource blocks, PRBs; and
determining a number of REs occupied by the second DCI based on the 3 bits of the MCS field of the first DCI by calculating the following:
N RE exDCI =┌N PRB DL ×R exDCIrate RE ┐×N symbol RE
where N RE exDCI refers to the number of REs of the second DCI, N PRB DL refers to an allocated Physical Resource Block, PRB, number indicated by the first DCI, N symbol RE refers to an effective RE number per Orthogonal Frequency Division Multiplexing, OFDM, symbol within the allocated PRBs and R exDCIrate RE refers to the 3-bit of the MCS field of the first DCI, and ┌ ┐ refers to a ceiling function.
2. The method of claim 1 , further comprising decoding the second DCI based on the first DCI.
3. The method of claim 1 , wherein 2 bits of the MCS field are used to indicate a modulation of the second DCI.
4. The method of claim 1 , wherein the second DCI spans a number of REs in the PDSCH from a first RE in a frequency direction first and then in a time direction until the number of REs is reached.
5. The method of claim 1 , wherein determining the number of REs comprises calculating the following:
N RE exDCI =N RE PRB ×R exDCIrate RE
Where N RE exDCI refers to the number of REs of the second DCI, N RE PRB is a number of RE per nominal PRBs, and R exDCIrate RE refers to the 3-bit of the MCS field of the first DCI.
6. The method of claim 2 , wherein decoding the second DCI comprises determining a coding rate for the second DCI.
7. The method of claim 1 , wherein performing one of encoding and decoding the user data further comprises determining a coding rate.
8. A wireless device comprising:
a communication interface; and
a processing circuit communicatively connected to the communication interface, and configured to:
receive a downlink signal, wherein the downlink signal comprises a Physical Downlink Control Channel (PDCCH) and a Physical downlink Shared Channel (PDSCH), the PDCCH having first downlink Control Information (DCI) indicating second downlink control information (DCI) in the PDSCH;
perform one of encoding and decoding user data in the PDSCH based on the first DCI and second DCI the first DCI comprising a Modulation and Coding Scheme, MCS, field which has 5 bits, and 3 bits of the MCS field being used to indicate a ratio of resource elements, RE, used for the second DCI over an effective RE number in allocated Physical Resource blocks, PRBs; and
determine a number of REs occupied by the second DCI based on the 3 bits of the MCS field of the first DCI by calculating the following:
N RE exDCI =┌N PRB DL ×R exDCIrate RE ┐×N symbol RE
where N RE exDCI refers to the number of REs of the second DCI, N PRB DL refers to an allocated Physical Resource Block, PRB, number indicated by the first DCI, N symbol RE refers to an effective RE number per Orthogonal Frequency Division Multiplexing, OFDM, symbol within the allocated PRBs and R exDCIrate RE refers to the 3-bit of the MCS field of the first DCI, and ┐ ┌ refers to a ceiling function.
9. The wireless device of claim 8 , wherein the processing circuit is configured to decode the second DCI based on the first DCI.
10. The wireless device of claim 8 , wherein 2 bits of the MCS field are used to indicate a modulation of the second DCI.
11. The wireless device of claim 8 , wherein the second DCI spans a number of REs in the PDSCH from a first RE in a frequency direction first and then in a time direction until the number of REs is reached.
12. The wireless device of claim 8 , wherein the processing circuit is configured to determine the number of REs by calculating the following:
N RE exDCI =N RE PRB ×R exDCIrate RE
where N RE exDCI refers to the number of REs of the second DCI, N RE PRB is a number of RE per nominal PRBs, and R exDCIrate RE refers to the 3-bit of the MCS field of the first DCI.
13. The wireless device of claim 9 , wherein the processing circuit is configured to decode the second DCI by determining a coding rate for the second DCI.
14. The wireless device of claim 8 , wherein the processing circuit is configured to perform one of encoding and decoding the user data by determining a coding rate.