System and method for multi-antenna communications

1. A computer-implemented method for operating an access node, comprising:

receiving, by the access node from a user equipment (UE), information on a maximum number of multiple input multiple output (MIMO) layers supported by the UE for an operation bandwidth within a system bandwidth operated by the access node, the operation bandwidth being less than the system bandwidth;

scheduling, by the access node for the UE, a bandwidth for data communications in accordance with the maximum number of MIMO layers supported by the UE;

sending, by the access node to the UE, allocation information related to the bandwidth; and

communicating, by the access node with the UE, a data frame on the bandwidth.

2. The computer-implemented method of claim 1 , further comprising:

negotiating, by the access node with the UE, to determine the maximum number of MIMO layers supported by the UE for the operation bandwidth.

3. The computer-implemented method of claim 1 , wherein the operation bandwidth comprises one of a bandwidth part (BWP) or a component carrier.

4. The computer-implemented method of claim 1 , further comprising:

configuring, by the access node, a first maximum number of MIMO layers for the operation bandwidth in accordance with the maximum number of MIMO layers supported by the UE for the operation bandwidth.

5. The computer-implemented method of claim 4 , wherein the first maximum number of MIMO layers for the operation bandwidth is less than or equal to the maximum number of MIMO layers supported by the UE for the operation bandwidth.

6. A computer-implemented method for operating a user equipment (UE), comprising:

receiving, by the UE from an access node, an allocation information for a first bandwidth;

configuring, by the UE, radio frequency (RF) chains of the UE in accordance with the first bandwidth, a second bandwidth supported by each RF chain, a maximum number of multiple input multiple output (MIMO) layers supported by the UE for a first operation bandwidth within a system bandwidth where the access node operates, and the first operation bandwidth; and

communicating, by the UE with the access node, a data frame on the first bandwidth using the configured RF chains.

7. The computer-implemented method of claim 6 , further comprising:

indicating, by the UE, first information on the maximum number of MIMO layers supported by the UE for the first operation bandwidth.

8. The computer-implemented method of claim 7 , wherein the indicating the first information comprises:

negotiating, by the UE, with the access node to determine the maximum number of MIMO layers.

9. The computer-implemented method of claim 6 , wherein the configuring the RF chains comprises:

determining, by the UE, that the first bandwidth is less than or equal to the second bandwidth, and based thereon,

configuring at least two RF chains with a single center frequency, with each RF chain spanning the first bandwidth.

10. The computer-implemented method of claim 6 , wherein the configuring the RF chains comprises:

determining, by the UE, that the first bandwidth is greater than the second bandwidth, and based thereon,

configuring at least two RF chains with different center frequencies, wherein a combined bandwidth of the at least two RF chains spans the first bandwidth.

11. The computer-implemented method of claim 6 , wherein the configuring the RF chains comprises:

determining, by the UE, that the second bandwidth is less than the first operation bandwidth, and based thereon,

configuring at least two RF chains with different center frequencies, wherein a combined bandwidth of the at least two RF chains spans the first operation bandwidth.

12. The computer-implemented method of claim 6 , further comprising:

indicating, by the UE, that a second maximum number of MIMO layers for a second operation bandwidth is equal to one.

13. The computer-implemented method of claim 12 , wherein the configuring the RF chains comprises:

determining, by the UE, that the first operation bandwidth and the second operation bandwidth are the same, and based thereon,

configuring, by the UE, one RF chain.

14. The computer-implemented method of claim 13 , further comprising:

monitoring, by the UE, for a control channel in the second operation bandwidth using the one RF chain.

15. The computer-implemented method of claim 12 , wherein the configuring the RF chains comprises:

determining, by the UE, that the first operation bandwidth and the second operation bandwidth are different operation bandwidths, and based thereon,

configuring the RF chains in accordance with the first bandwidth, the second bandwidth, the second operation bandwidth, and the maximum number of MIMO layers.

16. The computer-implemented method of claim 12 , wherein the indicating the second maximum number of MIMO layers for the second operation bandwidth comprises:

negotiating, by the UE, with the access node to schedule only single MIMO layer communications in the first operation bandwidth.

17. An access node comprising:

a non-transitory memory storage comprising instructions; and

one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to cause the access node to perform operations including:

receiving, from a user equipment (UE), information on a maximum number of multiple input multiple output (MIMO) layers supported by the UE for an operation bandwidth within a system bandwidth operated by the access node, the operation bandwidth being less than the system bandwidth,

scheduling, for the UE, a bandwidth for data communications in accordance with the maximum number of MIMO layers supported by the UE,

sending, to the UE, allocation information related to the bandwidth, and

communicating, with the UE, a data frame on the bandwidth.

18. The access node of claim 17 , the operations further comprising:

negotiating with the UE to determine the maximum number of MIMO layers supported by the UE for the operation bandwidth.

19. The access node of claim 17 , wherein the operation bandwidth comprises one of a bandwidth part (BWP) or a component carrier.

20. The access node of claim 17 , the operations further comprising:

configuring a first maximum number of MIMO layers for the operation bandwidth in accordance with the maximum number of MIMO layers supported by the UE for the operation bandwidth.

21. The access node of claim 20 , wherein the first maximum number of MIMO layers for the operation bandwidth is less than or equal to the maximum number of MIMO layers supported by the UE for the operation bandwidth.

22. A user equipment (UE) comprising:

a non-transitory memory storage comprising instructions; and

one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to cause the UE to perform operations including:

receiving, from an access node, an allocation information for a first bandwidth,

configuring radio frequency (RF) chains of the UE in accordance with the first bandwidth, a second bandwidth supported by each RF chain, a maximum number of multiple input multiple output (MIMO) layers supported by the UE for a first operation bandwidth within a system bandwidth where the access node operates, and the first operation bandwidth, and

communicating, with the access node, a data frame on the first bandwidth using the configured RF chains.

23. The UE of claim 22 , the operations further comprising:

indicating first information on the maximum number of MIMO layers supported by the UE for the first operation bandwidth.

24. The UE of claim 23 , wherein the indicating the first information comprises:

negotiating with the access node to determine the maximum number of MIMO layers.

25. The UE of claim 22 , wherein the configuring the RF chains comprises:

determining that the first bandwidth is less than or equal to the second bandwidth, and based thereon,

configuring at least two RF chains with a single center frequency, with each RF chain spanning the first bandwidth.

26. The UE of claim 22 , wherein the configuring the RF chains comprises:

determining that the first bandwidth is greater than the second bandwidth, and based thereon,

configuring at least two RF chains with different center frequencies, wherein a combined bandwidth of the at least two RF chains spans the first bandwidth.

27. The UE of claim 22 , wherein the configuring the RF chains comprises:

determining that the second bandwidth is less than the first operation bandwidth, and based thereon,

configuring at least two RF chains with different center frequencies, wherein a combined bandwidth of the at least two RF chains spans the first operation bandwidth.

28. The UE of claim 22 , the operations further comprising:

indicating that a second maximum number of MIMO layers for a second operation bandwidth is equal to one.

29. The UE of claim 22 , wherein the configuring the RF chains comprises:

determining that the first operation bandwidth and the second operation bandwidth are the same, and based thereon,

configuring one RF chain.

30. The UE of claim 29 , the operations further comprising:

monitoring for a control channel in the second operation bandwidth using the one RF chain.

31. The UE of claim 28 , wherein the configuring the RF chains comprises:

determining that the first operation bandwidth and the second operation bandwidth are different operation bandwidths, and based thereon,

configuring the RF chains in accordance with the first bandwidth, the second bandwidth, the second operation bandwidth, and the maximum number of MIMO layers.

32. The UE of claim 28 , wherein the indicating the second maximum number of MIMO layers for the second operation bandwidth comprises:

negotiating with the access node to schedule only single MIMO layer communications in the first operation bandwidth.