Methods and systems for performance enhancement of downlink shared channels
A method performed by a wireless device (WD) comprises receiving a control message. The control message indicating at least a Modulation and Coding Scheme (MCS) and a scaling factor for a downlink shared channel. The scaling factor indicates a value less than 1. The method further comprises determining a transport block size (TBS) based on the MCS and the scaling factor indicated in the control message. A method performed by a network node comprises indicating in a control message at least a Modulation and Coding Scheme (MCS) and a scaling factor for a downlink shared channel. The scaling factor indicating a value less than 1. The method further comprises sending the control message to a User Equipment (UE), the control message enabling determination of a Transport Block Size (TBS) for a shared downlink channel.
1. A method performed by a network node, the method comprising:
indicating in a control message at least a Modulation and Coding Scheme (MCS) and a scaling factor for a shared downlink channel, the scaling factor indicating a value less than 1; and
sending the control message to a User Equipment (UE), the control message enabling the UE to determine an intermediate number of information bits based at least on the MCS, the control message further enabling the UE to determine a Transport Block Size (TBS) for the shared downlink channel based at least on applying the scaling factor to the intermediate number of information bits.
2. The method of claim 1 , wherein the control message comprising at least one bit indicating to use a first scaling factor when a first bit of the at least one bit is set to a first value and to use a second scaling factor when the first bit is set to a second value.
3. The method of claim 1 , wherein the control message further indicates a time or frequency domain repetition.
4. The method of claim 1 , wherein the MCS indicated in the control message comprises a lower spectral efficiency than an MCS according to a third generation partnership project (3GPP) technical specification (TS) 38.214 version 15.2.0 or earlier.
5. The method of claim 1 , further comprising determining the MCS to indicate in the control message based on a table that is defined for an enhanced Mobile Broadband (eMBB) PDSCH.
6. The method of claim 1 , further comprising determining the MCS to indicate in the control message based on a table or table entries that are defined specifically for the PDSCH.
7. A method performed by a wireless device, the method comprising:
receiving a control message, the control message indicating at least a Modulation and Coding Scheme (MCS) and a scaling factor for a shared downlink channel, wherein the scaling factor indicates a value less than 1;
determining a transport block size (TBS) based at least on applying the scaling factor to an intermediate number of information bits, the intermediate number of information bits determined based at least on the MCS.
8. The method of claim 7 , wherein the control message comprises at least one bit indicating to use a first scaling factor when a first bit of the at least one bit is set to a first value and to use a second scaling factor when the first bit is set to a second value.
9. The method of claim 7 , wherein the control message further indicates a time or frequency domain repetition.
10. The method of claim 7 , wherein the MCS indicated in the control message comprises a lower spectral efficiency than an MCS according to a third generation partnership project (3GPP) technical specification (TS) 38.214 version 15.2.0 or earlier.
11. The method of claim 7 , wherein the control message indicates the MCS based on a table that is defined for an enhanced Mobile Broadband (eMBB) PDSCH.
12. The method of claim 7 , wherein the control message indicates the MCS based on a table or table entries that are defined specifically for the PDSCH.
13. A network node comprising memory operable to store instructions and processing circuitry operable to execute the instructions, wherein the processing circuitry executes the instructions to:
indicate in a control message at least a Modulation and Coding Scheme (MCS) and a scaling factor for a shared downlink channel, the scaling factor indicating a value less than 1; and
send the control message to a User Equipment (UE), the control message enabling the UE to determine an intermediate number of information bits based at least on the MCS, the control message further enabling the UE to determine a Transport Block Size (TBS) for the shared downlink channel based at least on applying the scaling factor to the intermediate number of information bits.
14. The network node of claim 13 , wherein the control message comprises at least one bit indicating to use a first scaling factor when a first bit of the at least one bit is set to a first value and to use a second scaling factor when the first bit is set to a second value.
15. The network node of claim 13 , wherein the control message further indicates a time or frequency domain repetition.
16. The network node of claim 13 , wherein the MCS indicated in the control message comprises a lower spectral efficiency an MCS according to a third generation partnership project (3GPP) technical specification (TS) 38.214 version 15.2.0 or earlier.
17. The network node of claim 13 , wherein the processing circuitry executes the instructions to determine the MCS to indicate in the control message based on a table that is defined for an enhanced Mobile Broadband (eMBB) PDSCH.
18. The network node of claim 13 , wherein the processing circuitry executes the instructions to determine the MCS to indicate in the control message based on a table or table entries that are defined specifically for the PDSCH.
19. A wireless device comprising memory operable to store instructions and processing circuitry operable to execute the instructions, wherein the processing circuitry executes the instructions to:
receive a control message, the control message indicating at least a Modulation and Coding Scheme (MCS) and a scaling factor for a shared downlink channel, wherein the scaling factor indicates a value less than 1;
determine a transport block size (TBS) based at least on applying the scaling factor to an intermediate number of information bits, the intermediate number of information bits determined based at least on the MCS.
20. The wireless device of claim 19 wherein the control message comprises at least one bit indicating to use a first scaling factor when a first bit of the at least one bit is set to a first value and to use a second scaling factor when the first bit is set to a second value.
21. The wireless device claim 19 wherein the control message further indicates a time or frequency domain repetition.
22. The wireless device of claim 19 wherein the MCS indicated in the control message comprises a lower spectral efficiency than an MCS according to a third generation partnership project (3GPP) technical specification (TS) 38.214 version 15.2.0 or earlier.
23. The wireless device of claim 19 wherein the control message indicates the MCS based on a table that is defined for an enhanced Mobile Broadband (eMBB) PDSCH.
24. The wireless device of claim 19 , wherein the control message indicates the MCS based on a table or table entries that are defined specifically for the PDSCH.