Section: 6.3.13.3 Authorization of C2 communication
Content: The network supports C2 communication authorization for pairing of UAV and UAV-C. The pairing of UAV and UAV-C needs to be authorized by USS successfully before the user plane connectivity for C2 communication (over Uu or over NR-PC5) is enabled. The UE supporting UAS services may provide the network with an identification information of UAV-C to pair with, if available, via the protocol configuration options as follows: - If the UE uses a common PDN connectivity for both USS communication and C2 communication with a UAV-C, the C2 communication with the UAV-C can be authorized using UUAA-SM procedure during the PDN connectivity procedure or during the bearer resource modification procedure. If the pairing of UAV and UAV-C is revoked, the network shall disable C2 communication for the PDN connection. NOTE 1: The network can disable C2 communication for the PDN connection e.g., by removing the packet filter(s) allocated for C2 communication during EPS bearer context modification procedure as specified in clause 6.4.3 or by deactivating the EPS bearer context for C2 communication during EPS bearer context deactivation procedure as specified in clause 6.4.4. - If the UE uses separate PDN connectivity for, respectively, USS communication and C2 communication with a UAV-C, the C2 communication with the UAV-C is authorized using UUAA-SM during the PDN connectivity procedure. If the pairing of UAV and UAV-C is revoked, the PDN connectivity or C2 communication shall be released by the network. The authorization of direct C2 communication can be performed during the C2 communication authorization procedure. NOTE 2: The C2 authorization payload in the service-level-AA payload, sent to the network via the protocol configuration options, can include an indication of the request for direct C2 communication and pairing information for direct C2 communication (see subclauses 6.4.3.3 and 6.5.1.2). The authorization of UAV flight can also be performed during the C2 communication authorization procedure. The UE supporting UAS services provides flight authorization information to the network via the protocol configuration options if the flight authorization information is already available in the UE.