Resource configuration method and apparatus for IAB nodes
This application provides a resource configuration method and a communication apparatus. In the technical solutions of this application, a donor node may configure different DU resource configurations for an IAB node and two parent nodes of the IAB, so that the IAB node can determine MT resources for different parent nodes based on the different DU resource configurations, to implement resource configuration of the IAB node in a dual connectivity scenario.
1. A communication apparatus, wherein the apparatus comprises:
a transceiver, configured to receive fourth configuration information, first indication information, and second indication information, wherein
the fourth configuration information indicates a resource type of a distributed unit (DU) of a first node,
the first indication information indicates a first unavailable resource of a first link between a first parent node of the first node and the first node, and
the second indication information indicates a second unavailable resource of a second link between a second parent node of the first node and the first node; and
a processor, configured to:
determine a third resource based on the fourth configuration information and the first indication information, wherein the third resource is a resource for communication between a mobile termination (MT) of the first node and the first parent node, and
determine a fourth resource based on the fourth configuration information and the second indication information, wherein the fourth resource is a resource for communication between the MT of the first node and the second parent node.
2. The apparatus according to claim 1 , wherein
the transceiver is configured to receive a first dynamic resource indication from the first parent node and a second dynamic resource indication from the second parent node, and
in response to both the first dynamic resource indication and the second dynamic resource indication indicating that a fifth time domain resource is an available resource, the processor is configured to determine the fifth time domain resource is an available resource of the DU of the first node.
3. The apparatus according to claim 2 , wherein the apparatus is the first node and comprises the transceiver and the processor.
4. The apparatus according to claim 1 , wherein the apparatus is the first node and comprises the transceiver and the processor.
5. The apparatus according to claim 4 , wherein the transceiver of the first node is configured to receive the fourth configuration information, the first indication information and the second indication information from a donor node with which the first node is communicated through the first parent node and the second parent node in parallel.
6. The apparatus according to claim 5 , wherein at least one of
the first indication information received by the first node from the donor node indicates a first link-level unavailable resource configured for the first parent node, the first link-level unavailable resource applicable only to the first link between the first parent node and the first node, or
the second indication information received by the first node from the donor node indicates a second link-level unavailable resource configured for the second parent node, the second link-level unavailable resource applicable only to the second link between the second parent node and the first node.
7. The apparatus according to claim 5 , wherein at least one of
the first indication information received by the first node from the donor node indicates a first link-level unavailable resource configured for the first parent node, wherein the first link-level unavailable resource is unavailable only to the first link between the first parent node and the first node and is available for another link, or
the second indication information received by the first node from the donor node indicates a second link-level unavailable resource configured for the second parent node, wherein the second link-level unavailable resource is unavailable only to the second link between the second parent node and the first node and is available for another link.
8. The apparatus according to claim 5 , wherein
the transceiver is configured to receive from the first parent node a first dynamic resource indication which indicates whether a fifth time domain resource is an available resource for the DU of the first node,
the first indication information received by the first node from the donor node indicates a first link-level unavailable resource configured for the first parent node, wherein the first link-level unavailable resource is unavailable only to the first link between the first parent node and the first node and is available for another link, and
in response to the first indication information indicating the first link-level unavailable resource, the processor is configured to ignore the first dynamic resource indication received from the first parent node.
9. The apparatus according to claim 8 , wherein
the transceiver is configured to receive from the second parent node a second dynamic resource indication which indicates whether a fifth time domain resource is an available resource for the DU of the first node,
the second indication information received by the first node from the donor node indicates a second link-level unavailable resource configured for the second parent node, wherein the second link-level unavailable resource is unavailable only to the second link between the second parent node and the first node and is available for another link, and
in response to the second indication information indicating the second link-level unavailable resource, the processor is configured to ignore the second dynamic resource indication received from the second parent node.
10. The apparatus according to claim 1 , wherein:
the first indication information indicates a first time domain position of an unavailable resource for a DU of the first parent node; and
the second indication information indicates a second time domain position of an unavailable resource for a DU of the second parent node.
11. The apparatus according to claim 10 , wherein the first time domain position of the unavailable resource for the DU of the first parent node as indicated by the first indication information is different from the second time domain position of the unavailable resource for the DU of the second parent node as indicated by the second indication information.
12. The apparatus according to claim 1 , wherein the first node receives a notification of at least one of:
a first correspondence between a DU cell of one of the first parent node or the second parent node, and an MT component carrier of the first node,
a second correspondence between the DU cell of the one of the first parent node or the second parent node, and an MT serving cell of an IAB node, wherein the IAB node is the first node, or
a third correspondence between the DU cell of the one of the first parent node or the second parent node, and the DU cell of the IAB node, wherein the IAB node is the first node.
13. A communication apparatus, wherein the apparatus comprises:
a processor, configured to determine fourth configuration information, first indication information, and second indication information, wherein
the fourth configuration information indicates a resource type of a distributed unit (DU) of a first node,
the first indication information indicates a first unavailable resource of a first link between a first parent node of the first node and the first node, and
the second indication information indicates a second unavailable resource of a second link between a second parent node of the first node and the first node; and
a transceiver, configured to:
send the fourth configuration information, the first indication information, and the second indication information to the first node,
send the fourth configuration information and the first indication information to the first parent node, and
send the fourth configuration information and the second indication information to the second parent node.
14. The apparatus according to claim 13 , wherein:
the first indication information indicates a first time domain position of an unavailable resource for a DU of the first parent node; and
the second indication information indicates a second time domain position of an unavailable resource for a DU of the second parent node.
15. The apparatus according to claim 14 , wherein the first time domain position of the unavailable resource for the DU of the first parent node as indicated by the first indication information is different from the second time domain position of the unavailable resource for the DU of the second parent node as indicated by the second indication information.
16. The apparatus according to claim 13 , wherein the first node receives a notification of at least one of:
a first correspondence between a DU cell of one of the first parent node or the second parent node, and an MT component carrier of the first node,
a second correspondence between the DU cell of the one of the first parent node or the second parent node, and an MT serving cell of an IAB node, wherein the IAB node is the first node, or
a third correspondence between the DU cell of the one of the first parent node or the second parent node, and the DU cell of the IAB node, wherein the IAB node is the first node.
17. The apparatus according to claim 13 , wherein the apparatus is a donor node which comprises the transceiver and the processor, and with which the first node is communicated through the first parent node and the second parent node in parallel.
18. The apparatus according to claim 17 , wherein at least one of
the first indication information sent to the first node from the donor node indicates a first link-level unavailable resource configured for the first parent node, the first link-level unavailable resource applicable only to the first link between the first parent node and the first node, or
the second indication information sent to the first node from the donor node indicates a second link-level unavailable resource configured for the second parent node, the second link-level unavailable resource applicable only to the second link between the second parent node and the first node.
19. A system, comprising:
a first node;
a first parent node;
a second parent node; and
a donor node with which the first node is communicated through the first parent node and the second parent node in parallel, wherein
the donor node is configured to
determine fourth configuration information, first indication information, and second indication information, wherein
the fourth configuration information indicates a resource type of a distributed unit (DU) of the first node,
the first indication information indicates a first unavailable resource of a first link between the first parent node and the first node, and
the second indication information indicates a second unavailable resource of a second link between the second parent node and the first node,
send the fourth configuration information, the first indication information, and the second indication information to the first node,
send the fourth configuration information and the first indication information to the first parent node, and
send the fourth configuration information and the second indication information to the second parent node, and
the first node is configured to
receive the fourth configuration information, the first indication information and the second indication information from the donor node,
determine a third resource based on the fourth configuration information and the first indication information, wherein the third resource is a resource for communication between a mobile termination (MT) of the first node and the first parent node, and
determine a fourth resource based on the fourth configuration information and the second indication information, wherein the fourth resource is a resource for communication between the MT of the first node and the second parent node.
20. The system according to claim 19 , wherein
the first node is configured to
receive a first dynamic resource indication from the first parent node,
receive a second dynamic resource indication from the second parent node, and
in response to both the first dynamic resource indication and the second dynamic resource indication indicating that a fifth time domain resource is an available resource, determine the fifth time domain resource is an available resource of the DU of the first node.