Section: 6.21.1 Description
Content: The increased density of access nodes needed to meet future performance objectives poses considerable challenges in deployment and acquiring spectrum and antenna locations. RAN sharing is seen as a technical solution to these issues. In RAN Sharing operations, NG-RAN resources can be used by multiple network operators. Indirect Network Sharingis one of the possible sharing methods. During NG-RAN sharing, the security and privacy of shared networks, non-shared networks, and subscribers need to be maintained without negative effects. Especially in the case of Indirect Network Sharing, where the involvement of the core network of the hosting operator e.g. for signalling exchange between the users and the core network of the participating operator could cause exposure of the subscriber’s information to the hosting network, an extra scrutiny of the security mechanism is expected to avoid sharing the information that is not needed for the Indirect Network Sharing operation (e.g. network topology) and protect the information that is needed for the Indirect Network Sharing operation between the hosting operator and the participating operator.