A method, apparatus and communication system for registering address information of a network anchor point to a network server, the method including receiving, by a packet data network gateway, a request message from a mobility management entity, determining, by the packet data network gateway in response to the request message, to register identity information of the packet data network gateway to a home subscriber server, and registering, to the home subscriber server, by the packet data network gateway in response to the determining to register the identity information, the identity information of the packet data network gateway and an access point name corresponding to the packet data network gateway.

A method, apparatus and communication system for registering address information of a network anchor point to a network server, the method including receiving, by a packet data network gateway, a request message from a mobility management entity, determining, by the packet data network gateway in response to the request message, to register identity information of the packet data network gateway to a home subscriber server, and registering, to the home subscriber server, by the packet data network gateway in response to the determining to register the identity information, the identity information of the packet data network gateway and an access point name corresponding to the packet data network gateway.

A device estimating apparatus acquires one or more DNS queries transmitted from each device connected to a network and generates comparison source data in which each content of the acquired DNS queries is associated with one or more pieces of attribute information of each of the one or more devices that have transmitted the DNS queries having the content. Thereafter, when one or more DNS queries are acquired from an estimation target device, the device estimating apparatus reads, for each DNS query, attribute information of one or more devices associated with a content of the DNS query from the comparison source data and estimates an attribute of the estimation target device using the read attribute information.

The present disclosure describes methods and systems for establishing a Session Initiation Protocol Session. One method includes transmitting a first message requesting authentication configuration information; in response to the first message, receiving a second message that includes the authentication configuration information; transmitting a third message that includes authentication information based upon the received authentication configuration information; receiving an authentication challenge request that is formatted according to the second protocol; and in response to receiving the authentication challenge request, transmitting an authentication response to the second network node.

A system and method are provided for a network device for use with a client device having a hostname and a MAC address. The network device contains a memory that has a second hostname and a second MAC address stored within the memory. The second MAC address corresponds to the second hostname. The memory also contains a processor configured to execute instructions stored on the memory to cause the network device to: receive, from the client device, the hostname and the MAC address; determine whether the MAC address is randomized; provide an instruction to the client device to inform a user of the client device that the client device hostname is registered when the hostname matches the second hostname and the MAC address is randomized.

A system and method are provided for a network device for use with a client device having a hostname and a MAC address. The network device contains a memory that has a second hostname and a second MAC address stored within the memory. The second MAC address corresponds to the second hostname. The memory also contains a processor configured to execute instructions stored on the memory to cause the network device to: receive, from the client device, the hostname and the MAC address; determine whether the MAC address is randomized; provide an instruction to the client device to inform a user of the client device that the client device hostname is registered when the hostname matches the second hostname and the MAC address is randomized.

A communication technology for converging a 5th-generation (5G) communication system for supporting a higher data rate after a 4th-generation (4G) system to an Internet of things (IoT) technology and a system thereof are provided. A method for connecting to a network by a terminal in a mobile communication system wherein a first communication network and a second communication network are operable, and an apparatus thereof are provided. The method includes transmitting, to a mobility management function, information on supportable communication network for the terminal and an attach request message including a packet data unit (PDU) session request, receiving an internet protocol (IP) address allocated based on the information on supportable communication network and an attach accept message including a PDU session response, and connecting to a network based on the IP address.

A communication technology for converging a 5th-generation (5G) communication system for supporting a higher data rate after a 4th-generation (4G) system to an Internet of things (IoT) technology and a system thereof are provided. A method for connecting to a network by a terminal in a mobile communication system wherein a first communication network and a second communication network are operable, and an apparatus thereof are provided. The method includes transmitting, to a mobility management function, information on supportable communication network for the terminal and an attach request message including a packet data unit (PDU) session request, receiving an internet protocol (IP) address allocated based on the information on supportable communication network and an attach accept message including a PDU session response, and connecting to a network based on the IP address.

An example method of operation may include one or more of identifying an inbound call intended for a mobile device subscribed to a protected carrier network, determining the inbound call is assigned an origination telephone number that is subscribed to the protected carrier network, determining whether an inbound call origination source location indicates the protected carrier network or an out-of-network carrier network based on one or more call parameters received with the inbound call, and determining whether to transmit an indication to the mobile device that the inbound call has an elevated likelihood of being a scam call based on the inbound call origination source location.

A communication session for a UE can be restored in the event of serving call session control function (S-CSCF) node unavailability and/or application server (AS) unavailability by storing, prior to IMS unavailability, attribute-value pairs (AVPs) at a home subscriber server (HSS). These AVPs can be used independently by individual IMS nodes to restore a communication session for a UE due to an unavailable IMS node. When a first S-CSCF node becomes unavailable, a proxy CSCF (P-CSCF) node can send a SIP request originating from the UE to a second S-CSCF node. The second S-CSCF node can then send a request to the HSS for an identifier of an AS associated with the UE. Upon receipt of the AS identifier (e.g., an active AS name AVP) from the HSS, the second S-CSCF node can send the SIP request to the AS in order to restore the communication session for the UE.