System and method for exchanging configuration information between two nodes in a wireless network

1. A method implemented on a distributed unit (DU), the method comprising:

generating a first message that comprises first configuration information associated with the DU; and

transmitting the first message to a centralized unit (CU) for exchanging configuration information with the CU, wherein the DU and the CU cooperate to serve at least one cell in a wireless network as a same base station, wherein the first configuration information comprises:

identification information of the DU for the CU to identify the DU; and

a list of public land mobile networks or tracking area identities supported by the DU; and

receiving a second message or a third message from the CU, wherein:

the second message comprises second configuration information associated with the CU;

the second configuration information comprises a list of public land mobile networks supported by the CU; and

the third message indicates a failure of the exchanging of configuration information.

2. The method of claim 1 , further comprising:

generating an update request message that comprises updated configuration information associated with the DU;

transmitting the update request message to the CU for updating the first configuration information associated with the DU; and

receiving a fourth message or a fifth message from the CU, wherein:

the fourth message indicates a confirmation of the updating, and

the fifth message indicates a failure of the updating.

3. The method of claim 1 , further comprising receiving a fourth message or a fifth message from the CU, wherein:

the fourth message comprises second configuration information associated with the CU; and

the fifth message indicates a failure of the exchanging of configuration information.

4. The method of claim 1 , further comprising:

receiving a status request message from the CU, wherein the status request message is sent by the CU for requesting resource status information related to the at least one cell associated with the DU;

generating a status update message that comprises at least some of the resource status information requested by the CU; and

transmitting the status update message to the CU.

5. The method of claim 4 , wherein the resource status information comprises at least one of following information for the at least one cell:

a global cell identity of each cell related to the resource status information;

load information of hardware per cell;

radio resource usage per cell;

overall available resource level in the at least one cell in downlink and uplink.

6. The method of claim 4 , further comprising transmitting a fourth message to the CU, wherein:

the fourth message indicates a measurement failure of resource status information in all of the at least one cell.

7. A method implemented on a centralized unit (CU), the method comprising:

receiving a first message from a distributed unit (DU) for exchanging configuration information with the DU, wherein the first message comprises first configuration information associated with the DU, and wherein the CU and the DU cooperate to serve at least one cell in a wireless network as a same base station, and wherein the first configuration information comprises:

identification information of the DU for the CU to identify the DU; and

a list of public land mobile networks or tracking area identities supported by the DU;

transmitting a second message or a third message to the DU, wherein:

the second message comprises second configuration information associated with the CU;

the second configuration information comprises a list of public land mobile networks supported by the CU; and

the third message indicates a failure of the exchanging of configuration information.

8. The method of claim 7 , further comprising:

receiving an update request message from the DU for updating the first configuration information associated with the DU, wherein the update request message comprises updated configuration information associated with the DU; and

transmitting a fourth message or a fifth message to the DU, wherein:

the fourth message indicates a confirmation of the updating, and

the fifth message indicates a failure of the updating.

9. The method of claim 7 , further comprising transmitting a fourth message or a fifth message to the DU, wherein:

the fourth message comprises second configuration information associated with the CU;

the fifth message indicates a failure of the exchanging of configuration information.

10. The method of claim 7 , further comprising:

transmitting a status request message to the DU, wherein the status request message is sent by the CU for requesting resource status information related to the at least one cell associated with the DU; and

receiving a status update message from the DU, wherein the status update message comprises at least some of the resource status information requested by the CU.

11. The method of claim 10 , wherein the resource status information comprises at least one of following information for the at least one cell:

a global cell identity of each cell related to the resource status information;

load information of hardware per cell;

radio resource usage per cell;

overall available resource level in the at least one cell in downlink and uplink.

12. The method of claim 10 , further comprising receiving a fourth message from the DU, wherein:

the fourth message indicates a measurement failure of resource status information in all of the at least one cell.

13. A distributed unit (DU), comprising:

a transceiver configured to transmit a first message comprising first configuration information associated with the DU to a centralized unit (CU) for exchanging configuration information with the CU, wherein the DU and the CU cooperate to serve at least one cell in a wireless network as a same base station, wherein the first configuration information comprises:

identification information of the DU for the CU to identify the DU; and

a list of public land mobile networks or tracking area identities supported by the DU,

wherein the transceiver is further configured to receive a second message or a third message from the CU, wherein:

the second message comprises second configuration information associated with the CU;

the second configuration information comprises a list of public land mobile networks supported by the CU; and

the third message indicates a failure of the exchanging of configuration information.

14. The DU of claim 13 , further comprising:

at least one processor configured to generate an update request message that comprises updated configuration information associated with the DU, and wherein the transceiver is further configured to:

transmit the update request message to the CU for updating the first configuration information associated with the DU; and

receive a fourth message or a fifth message from the CU, wherein:

the fourth message indicates a confirmation of the updating, and

the fifth message indicates a failure of the updating.

15. The DU of claim 13 , wherein the transceiver is further configured to receive a fourth message or a fifth message from the CU, wherein:

the fourth message comprises second configuration information associated with the CU; and

the fifth message indicates a failure of the exchanging of configuration information.

16. A centralized unit (CU), comprising:

a transceiver configured to receive a first message from a distributed unit (DU) for exchanging configuration information with the DU, wherein the first message comprises first configuration information associated with the DU, and wherein the CU and the DU cooperate to serve at least one cell in a wireless network as a same base station, and wherein the first configuration information comprises:

identification information of the DU for the CU to identify the DU; and

a list of public land mobile networks or tracking area identities supported by the DU,

wherein the transceiver is further configured to transmit a second message or a third message to the DU, wherein:

the second message comprises second configuration information associated with the CU;

the second configuration information comprises a list of public land mobile networks supported by the CU; and

the third message indicates a failure of the exchanging of configuration information.

17. The CU of claim 16 , wherein the transceiver is further configured to:

receive an update request message from the DU for updating the first configuration information associated with the DU, wherein the update request message comprises updated configuration information associated with the DU; and

transmit a fourth message or a fifth message to the DU, wherein:

the fourth message indicates a confirmation of the updating, and

the fifth message indicates a failure of the updating.

18. The CU of claim 16 , wherein the transceiver is further configured to transmit a fourth message or a fifth message to the DU, wherein:

the fourth message comprises second configuration information associated with the CU; and

the fifth message indicates a failure of the exchanging of configuration information.