A communication system includes: a service control apparatus that is provided in a first network in which user terminals communicate via a wireless base station and that distributes messages to the user terminals; a server that is provided in a second network for allowing user terminals to communicate without the mediation of a wireless base station and that communicates with the user terminals via the second network; and a relaying apparatus that is connected to the service control apparatus and that relays messages transmitted and received between user terminals in the first network and messages transmitted and received between user terminals in the first network and user terminals in the second network.

A call processing method, including receiving a first call request of a calling terminal for a called terminal, triggering a mobility management entity to control a base station to page the called terminal, performing call waiting according to a paging response message when receiving the paging response message from the mobility management entity indicating that the called terminal is a power saving state and cannot be paged by the base station, and establishing a session coupling between the calling terminal and the called terminal according to addressing information of the called terminal when receiving, in a call waiting process, the addressing information of the called terminal from the mobility management entity.

A method, a device, and a non-transitory storage medium provide receiving a plurality of voice call quality values and values for a plurality key performance indicators (KPIs) related to voice over Wi-Fi voice call quality; selecting a subset of the plurality of KPIs based on a correlation between each KPI and the voice call quality value; performing a plurality of discrete regression analyses based on the subsets of the plurality of KPIs and the voice call quality values to generate a plurality of regression results; determining an accuracy for each of the plurality of regression results; assigning weights to each of the plurality of regression results based on the determined accuracies; and combining the plurality of regression results using the assigned weights to generate a final combined estimated VoWiFi voice call quality algorithm that accurately predicts the voice call quality value based on values for the selected subset of the plurality of KPIs.

An electronic device is disclosed. The electronic device may comprise: a communication circuit for supporting a call function; a memory for storing a database including contacts of a plurality of users, wherein the database contains a plurality of contact groups and a first user of the plurality of users belongs to a first contact group; and a processor configured to cause the communication circuit to transmit, to a user terminal of the first user, a request for a profile call, which comprises a contact of the first user and information on images corresponding to the first contact group, when a user input to send a call to the first user is received.

The present disclosure relates to technologies for a sensor network, machine-to-machine (M2M) communications, or machine type communications (MTC), and Internet of things (IoT), and may be utilized in intelligent services, based on the above technologies, such as a smart home, a smart building, smart cities, smart cars or connected cars, smart grids, healthcare, smart electronics, advanced medical services, public safety network communications through fusion and convergence with conventional IT technologies and various industries. Data transmission control between a group of uncoordinated electronic devices in a computer network including the use of transmission authorization request messages and transmission authorization grant messages.

Systems and methods for adapting traditional landline telephones to make and receive Voice over Internet Protocol (VoIP) calls and other communications are described. In some embodiments, an adapter, adaptor, or other device or apparatus connects an IP router, such as a WiFi router or other access point, to a traditional landline telephone (e.g., a phone using dual-tone multi-frequency, or DTMF, signaling), enabling the traditional landline phone to make and/or receive VoIP calls.

A method, a device, and a non-transitory storage medium provide receiving a plurality of voice call quality values and values for a plurality key performance indicators (KPIs) related to voice over Wi-Fi voice call quality; selecting a subset of the plurality of KPIs based on a correlation between each KPI and the voice call quality value; performing a plurality of discrete regression analyses based on the subsets of the plurality of KPIs and the voice call quality values to generate a plurality of regression results; determining an accuracy for each of the plurality of regression results; assigning weights to each of the plurality of regression results based on the determined accuracies; and combining the plurality of regression results using the assigned weights to generate a final combined estimated VoWiFi voice call quality algorithm that accurately predicts the voice call quality value based on values for the selected subset of the plurality of KPIs.

The following disclosure relates a method and mediation device (100) in a Lawful Interception (LI) system for detecting and correlating copies of SIP and RTP flows, from different domains EPS or IMS, said method comprising to determine a unique IMS Communication Identity Number, IMS CIN, and a corresponding correlation set of identifiers, storing each unique IMS CIN together with its correlation set for an intercepted communication session, correlating a SIP or RTP flow received from one domain to the same SIP or RTP flows of the same communication session received from the other domain by comparing the flow identity information of the received flow to the stored correlation sets for identifying a matching correlation set and its unique IMS CIN and sending to a LEA requesting for LI of the target said received SIP or RTP flow comprising said identified unique IMS CIN for a matching correlation set.

Techniques for call handling between a cellular network and a communication service are described. In at least some embodiments, a call refers to a real-time exchange of communication media between different communication endpoints. According to one or more embodiments, techniques described herein determine whether to route a call over a cellular network or to transfer (e.g., hand over) the call from the cellular network to a communication service. This determination can be made based on various policies that consider different call-related criteria.

Integrated voice and data services are provided that utilize wired cordless access with unlicensed/unregulated connectivity sources. A digital cordless telephone operates over unlicensed/unregulated spectrum in conjunction with one or more wireless access points (WAPs) that are installed in homes, businesses, entertainment venues, and the like. The WAPs are connected to a communications service provider's broadband packet data network. A user may use the device when they are in range of another wireless access point in a public or private building that also is connected to their communications service provider's broadband packet data network.