Disclosed are a method and device for realizing WIFI talkback of a terminal, related to the field of mobile communications technologies, wherein the method includes the following steps: a calling terminal initiating a request for obtaining a dynamic IP address via a WIFI wireless local area network (LAN); after receiving the request, a called terminal judging whether the calling terminal has successfully obtained the dynamic IP address; if the called terminal determines that the calling terminal has successfully obtained the dynamic IP address, it determining whether the calling terminal has enabled a talkback function; if the called terminal determines that the calling terminal has initiated the talkback function, the called terminal sending a message to the calling terminal for indicating that the called terminal is online, thereby enabling the calling terminal and the called terminal to perform the WIFI talkback.

Disclosed are various embodiments for dynamically adjusting the amount of media content to be cached by a client device streaming media from a streaming device. An initial amount of media content is transmitted for caching to the client device from the streaming device. The location of a client device can be used to determine a connectivity interruption probability between the client device and the streaming device. The amount of media content for caching on the client device is adjusted based on the connectivity interruption probability, and the adjusted amount of media content is transmitted to the client device.

Systems, methods, and instrumentalities are disclosed to provide privacy for inter-user equipment transfer (IUT) subscribers and remote parties involved in sessions with IUT subscribers. A first UE may establish a session with a remote party. The first UE may seek to perform an IUT to a second UE. The first UE may send a first request for the IUT to a service centralization and continuity application server (SCC AS). The SCC AS may receive the first request and perform an authorization. The SCC AS may determine that the requested IUT is allowed for the session. The SCC AS may send a second request to the remote party indicating the requested IUT. The remote party may evaluate the second request and may accept or reject the second request.

A system and method for selecting a data delivery network. A determination is made of user information associated with a communication from a user. A determination is made of performance information for multiple data delivery networks. The data delivery network is selected for the communication from the multiple data delivery networks.

Provided are a method and device for an IMS terminal to access a network. The method includes that: a home location IMS terminal management system of the IMS terminal acquires IMS network access point information of a visit location from a visit location IMS terminal management system of the IMS terminal, wherein the IMS terminal management systems synchronize their respective data via an interface; and the home location IMS terminal management system sends configuration information to the IMS terminal, wherein the configuration information includes the acquired IMS network access point information. In the disclosure, the home location IMS terminal management system of the IMS terminal acquires the access point information of the visit location, and sends to the IMS terminal configuration information including the access point information, thus enabling the access point acquired by the IMS terminal to be more accurate, and improving the security of an IMS network.

A receiving terminal in a hybrid network receives a video stream through a broadcasting network. The receiving terminal receives a high speed video stream streamed at a high speed for a defined first period from a first time when switching from the broadcasting network to a communication network depending on a receiving state of the broadcasting network is determined, receives a live video stream streamed in a live form from any one time of the first period, and generates a continuous video stream using the video stream received through the broadcasting network, the high speed video stream, and the live video stream.

A selective call blocking function (SCBF) device, included in an internet protocol (IP) multimedia subsystem (IMS), processes a request to establish an IP call on an LTE network, such as a voice over long term evolution (VoLTE) call. The SCBF device identifies a user equipment (UE) associated with the IP call and an associated eNode B (eNB). For example, the SCBF may access a subscriber location memory to determine a location of the UE and an eNB associated with the location. The SCBF determines whether the eNB supports the IP call, and permits the IP call to be established via the IMS when the eNB supports the IP call. When the eNB does not support the IP call, the SCBF blocks the IP call and initiates a non-IP call, such as a 1× call, to the UE to prevent communications interruptions.

According to an aspect of the present disclosure, a method is disclosed for a SIPIMR node to withdraw from a SIP session set-up loop by replying a redirect message to the SIP Invite sending node. The redirect message contains information for setting up alternative SIP session, said information being available in the SIP Invite receiving node. This information is usable by the SIPIMS node for establishing an alternative SIP session as well as information needed by other nodes and applications further on in the SIP session set-up loop. The SIPIMS node is specially adapted to retrieve the information from the redirect message for establishing a new SIP session based on and containing the information from the redirect message. Several implementations are given for use in an IP Multimedia Subsystem of a telecommunication network.

A hardened VoIP system is presented that includes secure push-to-talk voice functionality. Through the addition of encryption, authentication, user filtering, and integration with new and existing LMR systems, a secure voice platform ensures malicious software, unauthorized access and brute force security attacks will not compromise the voice communications of the system. The VoIP system is engineered to ensure graceful system degradation in the event of maintenance activities, natural disasters and failure modes. The hardened VoIP system offers the functions a LMR trunking system while utilizing broadband connections. Private calls, group calls, Emergency Alarms with covert monitoring capability, scanning and priority scanning may be incorporated into the system. The system includes a VoIP controller that serves as a trunking controller, manages available VoIP based conference bridges, and assigns them as needed to the parties involved in each voice call. The system includes multiple fallback methods that may be prioritized based on pre-failure analytics.

The disclosure provides to a method and an apparatus for supervised learning approach for reducing latency during a context switchover in a 5G Multi-access Edge Computing (MEC). An example method for performing a context switchover in a wireless network includes identifying a plurality of first parameters associated with a user equipment (UE) and a plurality of second parameters associated with an edge network entity; receiving a data path change notification from a session management entity; determining a ranking for each of a plurality of edge application servers (EASs) based on the plurality of first parameters and the plurality of second parameters, in response to reception of the data path change notification; selecting at least one target EAS of the plurality of EASs based on the ranking for each of the plurality of EASs; and performing the context switchover to the at least one target EAS.