Client device, network node, and methods thereof for predicting user-experienced signal-to-interference-plus-noise ratio

1. A client device for a wireless communication system, the client device comprising:

a non-transitory memory, configured to store a program code; and

a processor, wherein when the program code runs in the processor, the processor is caused to:

receive an indication of a first network signal-to-interference-plus-noise ratio (SINR) for a first data transmission (DT 1 ) from a network node;

derive the first network SINR based on the indication of the first network SINR;

estimate an adjusted SINR for a second data transmission (DT 2 ) from the network node;

compute a SINR difference value between the first network SINR and the estimated adjusted SINR; and

output at least one first control message (CM 1 ), the CM 1 comprising an indication of an SINR adjustment for the estimated adjusted SINR to the network node in a case where the SINR difference value is larger than a threshold value, wherein the threshold value is a predetermined minimum allowed difference between the first network SINR and the estimated adjusted SINR.

2. The client device according to claim 1 , wherein when the program code runs in the processor, the processor is caused to:

receive the DT 1 from the network node;

determine a decoding process outcome for the DT 1 based on the indication of the first network SINR; and

output the CM 1 based upon the SINR difference value being larger than the threshold value and based upon the decoding process outcome being a decoding error or a decoding success.

3. The client device according to claim 1 , wherein when the program code runs in the processor, the processor is caused to:

output the CM 1 in a contention based access channel (CBAC).

4. The client device according to claim 3 , wherein when the program code runs in the processor, the processor is caused to:

receive a second control message (CM 2 ) from the network node, wherein the CM 2 comprises a channel access configuration for the CBAC; and

output the CM 1 in the CBAC according to the channel access configuration.

5. The client device according to claim 4 ,

wherein the CM 2 further comprises a valid access time period for the CBAC, and

wherein, when the program code runs in the processor, the processor is caused to: access the CBAC during the valid access time period.

6. The client device according to claim 4 ,

wherein the CM 2 further comprises a priority level, and

wherein, when the program code runs in the processor, the processor is caused to: use the priority level in a back-off collision scheme when accessing the CBAC.

7. The client device according to claim 4 , wherein the CM 2 further comprises the threshold value.

8. The client device according to claim 3 , wherein when the program code runs in the processor, the processor is caused to: output payload data to the network node in the CBAC.

9. The client device according to claim 1 , the client device being configured to determine a transmission buffer status report (BSR) of the client device, wherein the CM 1 further comprises the transmission BSR.

10. The client device according to claim 1 , the client device being configured to determine a scheduling request (SR) for the client device, wherein the CM 1 further comprises the SR.

11. A method for operating a client device for a wireless communication system, the method comprising:

receiving an indication of a first network signal-to-interference-plus-noise ratio (SINR) for a first data transmission (DT 1 ) from a network node;

deriving the first network SINR based on the indication of the first network SINR;

estimating an adjusted SINR for a second data transmission (DT 2 ) from the network node;

computing a SINR difference value between the first network SINR and the estimated adjusted SINR; and

outputting at least one first control message (CM 1 ), the CM 1 comprising an indication of an SINR adjustment for the estimated adjusted SINR to the network node in a case where the SINR difference value is larger than a threshold value, wherein the threshold value is a predetermined minimum allowed difference between the first network SINR and the estimated adjusted SINR.

12. The method according to claim 11 , the method further comprising:

receiving the DT 1 from the network node;

determining a decoding process outcome for the DT 1 based on the indication of the first network SINR;

outputting the CM 1 based upon the SINR difference value being larger than the threshold value and based upon the decoding process outcome being a decoding error or a decoding success.

13. The method according to claim 11 , wherein the transmitting of the first control message comprises:

outputting the CM 1 in a contention based access channel (CBAC).

14. The method according to claim 13 , the method further comprising:

receiving a second control message (CM 2 ) from the network node, wherein the CM 2 comprises a channel access configuration for the CBAC; and

outputting the CM 1 in the CBAC according to the channel access configuration.

15. The method according to claim 14 ,

wherein the CM 2 further comprises a valid access time period for the CBAC, and

wherein the method further comprises accessing the CBAC during the valid access time period.

16. The method according to claim 14 ,

wherein the CM 2 further comprises a priority level, and

wherein the method further comprises using the priority level in a back-off collision scheme when accessing the CBAC.

17. The method according to claim 14 , wherein the CM 2 further comprises the threshold value.

18. The method according to claim 13 , the method further comprising:

outputting payload data to the network node in the CBAC.

19. The method according to claim 11 , the method further comprising determining a transmission buffer status report (BSR) of the client device, wherein the CM 1 further comprises the transmission BSR.

20. The method according to claim 11 , the method further comprising: determining a scheduling request (SR) for the client device, wherein the CM 1 further comprises the SR.