Apparatus, method, and computer program

1. An apparatus comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive a resource configuration for a first cell group link;

receive a resource configuration for a second cell group link;

determine a mode of operation, wherein the mode of operation is one of time division duplexing, spatial division duplexing or frequency division duplexing between the first cell group link and the second cell group link;

determine a resource type for the first cell group link or the second cell group link based on the resource configuration for the first cell group link, the resource configuration for the second cell group link and the mode of operation;

determine that the resource configuration for the first cell group link and the resource configuration for the second cell group link form a predefined combination, wherein the predefined combination is one of:

the resource configuration for the first cell group link is ‘downlink’ and the resource configuration for the second cell group link is ‘flexible’; or

the resource configuration for the first cell group link is ‘uplink’ and the resource configuration for the second cell group link is ‘flexible’; and

determine that the resource type for the first cell group link is ‘downlink’, ‘uplink’ or ‘flexible’ and the resource type for the second cell group link is ‘not available’.

2. The apparatus of claim 1 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

determine a resource type for the first cell group link and a resource type for the second cell group link based on the resource configuration for the first cell group link, the resource configuration for the second cell group link and the mode of operation.

3. The apparatus of claim 1 , wherein the resource is a time domain resource.

4. The apparatus of claim 1 , wherein the resource configuration for the first cell group link indicates a resource type.

5. The apparatus of claim 1 , wherein the resource configuration for the second cell group link indicates a resource type.

6. The apparatus of claim 1 , wherein the resource type for the first cell group link or the second cell group link is one of: ‘downlink’, ‘uplink’, ‘flexible’ or ‘not available’.

7. The apparatus of claim 1 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

determine that the resource configuration for the first cell group link and the resource configuration for the second cell group link form a predefined combination; and

determine that the resource type for the first cell group link is ‘not available’ and the resource type for the second cell group link is ‘downlink’, ‘uplink’ or ‘flexible’.

8. The apparatus of claim 7 , wherein the predefined combination is one of:

the resource configuration for the first cell group link is ‘flexible’ and the resource configuration for the second cell group link is ‘downlink; or

the resource configuration for the first cell group link is ‘flexible’ and the resource configuration for the second cell group link is ‘uplink’.

9. The apparatus of claim 7 , wherein the resource type for the second cell group link is ‘downlink’ or ‘uplink’ based on the resource configuration of the second cell group link.

10. The apparatus of claim 1 , wherein the mode of operation is spatial division duplexing or frequency division duplexing between the first cell group link and the second cell group link.

11. The apparatus of claim 10 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

determine that the resource configuration for the first cell group link and the resource configuration for the second cell group link form a predefined combination; and

determine that the resource type for the first cell group link is ‘downlink’, ‘uplink’ or ‘flexible’ and the resource type for the second cell group link is ‘available’.

12. The apparatus of claim 1 , wherein at least one of the resource configuration for the first cell group link and the resource configuration for the second cell group link is a semi-static configuration.

13. The apparatus of claim 1 , wherein one of the resource configuration for the first cell group link and the resource configuration for the second cell group link is a semi-static configuration and the other one of the resource configuration for the first cell group link and the resource configuration for the second cell group link is a dynamic configuration.

14. The apparatus of claim 1 , wherein the apparatus is an integrated access and backhaul node.

15. The apparatus of claim 14 , wherein the mode of operation is determined based on an indication received from an integrated access and backhaul parent node or a centralized unit.

16. A method comprising:

receive a resource configuration for a first cell group link;

receive a resource configuration for a second cell group link;

determine a mode of operation, wherein the mode of operation is one of time division duplexing, spatial division duplexing or frequency division duplexing between the first cell group link and the second cell group link;

determine a resource type for the first cell group link or the second cell group link based on the resource configuration for the first cell group link, the resource configuration for the second cell group link and the mode of operation;

determine that the resource configuration for the first cell group link and the resource configuration for the second cell group link form a predefined combination, wherein the predefined combination is one of:

the resource configuration for the first cell group link is ‘downlink’ and the resource configuration for the second cell group link is ‘flexible’: or

the resource configuration for the first cell group link is ‘uplink’ and the resource configuration for the second cell group link is ‘flexible’; and

determine that the resource type for the first cell group link is ‘downlink’, ‘uplink’ or ‘flexible’ and the resource type for the second cell group link is ‘not available’.

17. A non-transitory, computer readable medium comprising program instructions stored thereon, for performing at least the steps to:

receive a resource configuration for a first cell group link;

receive a resource configuration for a second cell group link;

determine a mode of operation, wherein the mode of operation is one of time division duplexing, spatial division duplexing or frequency division duplexing between the first cell group link and the second cell group link;

determine a resource type for the first cell group link or the second cell group link based on the resource configuration for the first cell group link, the resource configuration for the second cell group link and the mode of operation;

determine that the resource configuration for the first cell group link and the resource configuration for the second cell group link form a predefined combination, wherein the predefined combination is one of:

the resource configuration for the first cell group link is ‘downlink’ and the resource configuration for the second cell group link is ‘flexible’: or

the resource configuration for the first cell group link is ‘uplink’ and the resource configuration for the second cell group link is ‘flexible’; and

determine that the resource type for the first cell group link is ‘downlink’, ‘uplink’ or ‘flexible’ and the resource type for the second cell group link is ‘not available’.