Transport network layer associations on the FI interface
Apparatuses, systems, methods, and computer-readable media associated with F1 interface arrangement configuration within a network that implements virtualized NodeBs are disclosed herein. In embodiments, one or more non-transitory computer-readable media having instructions stored thereon, wherein the instructions, in response to execution by one or more processors, cause a centralized unit (CU) of an access node to generate a CU configuration update message, the CU configuration update message to include an indication of a transport network layer (TNL) address of the CU for which a TNL association between the CU and a distributed unit (DU) of the access node is to be added or removed, and cause the CU configuration update message to be transmitted to the DU. Other embodiments may be described and/or claimed.
1. One or more non-transitory computer-readable media having instructions stored thereon, wherein the instructions, in response to execution by one or more processors, cause a centralized unit (CU) of an access node to:
after an F1 setup procedure and in response to a change in one or more computational resources of the CU, generate a CU configuration update message, wherein the CU configuration update message comprises:
a first list of one or more transport network layer (TNL) addresses of the CU for which one or more TNL associations between the CU and a distributed unit (DU) is to be added, and
a second list of one or more TNL addresses of the CU for which one or more TNL associations between the CU and the DU is to be removed;
cause the CU configuration update message to be transmitted to the DU; and
receive, from the DU, a CU configuration update acknowledgment message indicating whether the one or more TNL associations was added or removed.
2. The one or more non-transitory computer-readable media of claim 1 , wherein the CU configuration update message further comprises a first information element (IE) comprising the first list of one or more TNL addresses and a second IE comprising the second list of one or more TNL addresses.
3. The one or more non-transitory computer-readable media of claim 1 , wherein the CU configuration update message indicates to the DU that the one or more TNL associations is to be established with the CU via the first list of one or more TNL addresses.
4. The one or more non-transitory computer-readable media of claim 1 , wherein the CU configuration update message indicates to the DU that the one or more TNL associations associated with the second list of one or more TNL addresses is to be removed.
5. The one or more non-transitory computer-readable media of claim 1 , wherein at least one of the one or more TNL associations to be added or the one or more TNL associations to be removed comprises a stream control transmission protocol (SCTP) association.
6. The one or more non-transitory computer-readable media of claim 1 , wherein the access node is a next generation NodeB (gNB), the CU is a CU of the gNB (gNB-CU), the DU is a DU of the gNB (gNB-DU), and the CU configuration update message is a gNB-CU configuration update message.
7. The one or more non-transitory computer-readable media of claim 1 , wherein the change in the one or more computational resources of the CU comprises an instantiation of an additional computational resource of the CU and the CU configuration update message is generated in response to the instantiation of the additional computational resource of the CU.
8. An apparatus for a centralized unit (CU) of an access node, comprising:
circuitry configured to generate, after an F1 setup procedure and in response to a change in one or more computational resources of the CU, a CU configuration update message, wherein the CU configuration update message comprises:
a first list of one or more transport network layer (TNL) addresses of the CU for which one or more TNL associations between the CU and a distributed unit (DU) is to be added, and
a second list of one or more TNL addresses of the CU for which one or more TNL associations between the CU and the DU is to be removed; and
memory coupled to the circuitry, the memory configured to store the CU configuration update message for transmission to the DU.
9. The one or more non-transitory computer-readable media of claim 1 , wherein the change in the one or more computational resources of the CU comprises a shutdown of a computational resource of the CU and the CU configuration update message is generated in response to the shutdown of the computational resource of the CU.
10. The one or more non-transitory computer-readable media of claim 1 , wherein the CU configuration update message comprises an information element (IE) including a list of the one or more TNL associations between the CU and the DU that are to be established by the DU.
11. The one or more non-transitory computer-readable media of claim 10 , wherein the CU configuration update message further comprises a second IE including a second list of the one or more TNL associations between the CU and the DU that are to be removed by the DU.
12. The one or more non-transitory computer-readable media of claim 1 , wherein the CU configuration update message comprises:
a first information element (IE) including a first value that indicates that the one or more TNL associations between the CU and the DU is to be added, and
a second IE including a second value that indicates that the one or more TNL associations between the CU and the DU is to be removed.
13. The apparatus of claim 8 , wherein the change in the one or more computational resources of the CU comprises an instantiation of an additional computational resource of the CU, wherein the circuitry is further configured to detect the instantiation of the additional computational resource of the CU, and wherein the CU configuration update message is generated in response to the detection of the instantiation of the additional computational resource.
14. The apparatus of claim 8 , wherein the circuitry is further configured to transmit the CU configuration update message to the DU and configured to receive, from the DU, a CU configuration update acknowledgment message indicating whether the TNL associations was added or removed.
15. An apparatus for a centralized unit (CU) of an access node, comprising:
circuitry configured to:
generate, after an F1 setup procedure and in response to a change in one or more computational resources of the CU, a CU configuration update message, wherein the CU configuration update message comprises a first list of one or more transport network layer (TNL) addresses of the CU for which one or more TNL associations between the CU and a distributed unit (DU) is to be removed; and
receive, from the DU, a CU configuration update acknowledgment message indicating that the TNL association was removed; and
memory coupled to the circuitry, the memory configured to store the CU configuration update message for transmission to the DU.
16. The apparatus of claim 15 , wherein the CU configuration update message further comprises an information element comprising the one or more TNL associations that the DU is to remove.
17. The apparatus of claim 15 , wherein the circuitry is further configured to transmit the CU configuration update message to the DU.
18. The apparatus of claim 15 , wherein the change in the one or more computational resources of the CU comprises a shutdown of a computational resource of the CU, wherein the circuitry is further configured to detect the shutdown of the computational resource of the CU, and wherein the CU configuration update message is generated in response to the detection of the shutdown of the computational resource of the CU.
19. The apparatus of claim 15 , wherein the CU configuration update message further comprises an indication of another TNL association to be used for load balancing.
20. One or more non-transitory computer-readable media having instructions stored thereon, wherein the instructions, in response to execution by one or more processors, cause a distributed unit (DU) of an access node to:
detect reception, from a centralized unit (CU) of the access node, of a CU configuration update message, the CU configuration update message comprising a first list of one or more transport network layer (TNL) addresses of the CU, the first list comprising a first TNL address of the CU for which a first TNL association between the CU and the DU is to be added and a second TNL address of the CU for which a second TNL association between the CU and the DU is to be removed,
wherein the CU configuration update message is received after an F1 setup procedure and in response to a change in one or more computational resources of the CU;
initiate establishment of the first TNL association between the CU and the DU via the first TNL address in response to the detection of the reception of the CU configuration update message; and
initiate removal of the second TNL association between the CU and the DU via the second TNL address in response to the detection of the reception of the CU configuration update message.