Abstract: Various examples pertaining to improvement for incorrect key set identifier (KSI) handling in mobile communications are described. An apparatus (e.g., user equipment) receives from a wireless network an authentication challenge after the processor having completed an authentication and key agreement (AKA) procedure with the wireless network. The apparatus detects an error in the authentication challenge and handles the error in the authentication challenge. For example, the apparatus can reject the authentication challenge responsive to detecting the error. Alternatively, the apparatus can accept the authentication challenge.

Abstract: Various examples pertaining to improvement for incorrect key set identifier (KSI) handling in mobile communications are described. An apparatus (e.g., user equipment) receives from a wireless network an authentication challenge after the processor having completed an authentication and key agreement (AKA) procedure with the wireless network. The apparatus detects an error in the authentication challenge and handles the error in the authentication challenge. For example, the apparatus can reject the authentication challenge responsive to detecting the error. Alternatively, the apparatus can accept the authentication challenge.

Abstract: Systems, methods, and apparatuses are provided for handling a legacy circuit switched communication. A method may include receiving a service request message at a network node on a packet switched network that does not support circuit switched fallback. The method may additionally include determining that the service request message includes a request for establishment of a communication requiring a circuit switched connection and having a user equipment connected to the packet switched network as an end point of the communication. The method may further include releasing the connection between the user equipment and the packet switched network in response to the determination. Corresponding systems and apparatuses are also provided.

Abstract: Embodiments provide a method, apparatus and computer program for operating a user equipment (UE). The method beings by determining that a valid authentication for the UE, generated with a radio network operating with a first radio access technology (RAT), is not a mutual authentication between the UE and the network operating with the first RAT. In response, the UE unilaterally takes action to prevent the valid authentication that is not a mutual authentication from being used to authenticate with a radio network operating with a second RAT that utilizes mutual authentication.

Abstract: Embodiments provide a method, apparatus and computer program for operating a user equipment (UE). The method begins by determining that a valid authentication for the UE, generated with a radio network operating with a first radio access technology (RAT), is not a mutual authentication between the UE and the network operating with the first RAT. In response, the UE unilaterally takes action to prevent the valid authentication that is not a mutual authentication from being used to authenticate with a radio network operating with a second RAT that utilizes mutual authentication.

Abstract: Embodiments provide a method, apparatus and computer program for operating a user equipment (UE). The method begins by determining that a valid authentication for the UE, generated with a radio network operating with a first radio access technology (RAT), is not a mutual authentication between the UE and the network operating with the first RAT. In response, the UE unilaterally takes action to prevent the valid authentication that is not a mutual authentication from being used to authenticate with a radio network operating with a second RAT that utilizes mutual authentication.

Abstract: Systems, methods, and apparatuses are provided for handling a legacy circuit switched communication. A method may include receiving a service request message at a network node on a packet switched network that does not support circuit switched fallback. The method may additionally include determining that the service request message includes a request for establishment of a communication requiring a circuit switched connection and having a user equipment connected to the packet switched network as an end point of the communication. The method may further include releasing the connection between the user equipment and the packet switched network in response to the determination. Corresponding systems and apparatuses are also provided.

Abstract: A system includes a local mobile network and user equipment, where the user equipment is configured to detect a local network identity of a local mobile network, determine whether a selected condition involving the local network identity is satisfied, and indicate whether a breakout connection is appropriate based on whether the selected condition is satisfied. The breakout connection is appropriate when the selected condition is unsatisfied. A non-breakout connection is appropriate regardless of whether the selected condition is satisfied or unsatisfied In some embodiments, the selected condition is satisfied when the local network identity corresponds to a network identity of a home public land mobile network or an equivalent home public land mobile network.