A method is described for processing a request by server of a multimedia IP network core, the request issued by a first device registered with a first multimedia IP network core and destined for a public identity allocated to at least one second device. The method includes replication of the request as a first request and at least one second request; triggering a routing of the first request within the first multimedia IP network core; and triggering a routing of the at least one second request according to at least one predetermined route destined for at least one entity for interconnection of the first multimedia IP network core with a second network core distinct from the first multimedia IP network core.

A system, server, and method of DTMF detection in a VoIP network.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Embodiments herein provide a method for HPLMN-based traffic control in a wireless communication network when a UE 300 is registered on different PLMNs.

Systems and methods are disclosed for service request triggered fallback for an emergency service in a cellular communications system. Embodiments of a method performed by a wireless device for redirecting from a first wireless communication system to a second wireless communication system after having performed a service request in the first wireless communication system for an emergency call are also disclosed. In some embodiments, the method comprises transmitting a connection request message to a base station in the second wireless communication system as part of a connection establishment procedure whereby the wireless device establishes a connection to the second wireless communication system, the connection request message comprising an indication that a cause of connection establishment is an emergency. In this manner, the base station can provide emergency treatment for the connection request. Corresponding embodiments of a wireless device are also disclosed.

The present disclosure refers to methods and systems to reduce delays in VoWI-FI handover and packet switching registration. The method includes triggering a Router Solicitation Router Advertisement (RSRA) procedure to establish a Transmission Control Protocol/Internet Protocol (TCP/IP) interface based on a determination that the VoWi-Fi handover of a user equipment (UE) is to be performed, determining if a router advertisement (RA) is received within a first time interval, and obtaining a full Internet Protocol version 6 (IPv6) address previously used by the UE in response to determining that the RA is not received within the first time interval, the full IPv6 address being for establishing the TCP/IP interface with a network.

The present disclosure describes systems and methods for a user equipment wirelessly communicating with another user equipment using dual connectivity (DC) with a terrestrial base station and a satellite or high-altitude platform. The described methods and systems include a principal routing manager assessing that different subsets of data, to be transmitted from the user equipment to the other user equipment, can use different, respective qualities of service (QoS) offered through different wireless-communication networks associated with the terrestrial base station and the satellite or high-altitude platform. The principal routing manager causes a routing command message to be sent to the user equipment, directing the user equipment to enter a state of dual connectivity with the terrestrial base station and the satellite or high-altitude platform and transmit the different of the data in accordance with the QoS offered by the different wireless-communication networks that are associated with the terrestrial base station and satellite or high-altitude platform.

Techniques for buffering data over high bandwidth networks are provided. A first portion of data is downloaded into a buffer at a first download speed. The first portion of data is outputted from the buffer. Upon determining that data is being downloaded at a second download speed greater than the first download speed, it is determined to use a cache for one or more subsequent portions of data, and a second portion of data is downloaded into the cache. Upon determining that the buffer is empty, the second portion of data is outputted from the cache.

A vehicle remote support system includes a communication system that operates over a plurality of parallel wireless network connections to provide low-latency video from vehicle to a remote support server that provides remote support to the vehicle dependent on real-time video. The vehicle includes a source that encodes multiple versions of the original video segments (e.g., one per wireless network connection) and transmits the multiple versions of the segments to a sink at the remote support server over the respective wireless connections. This redundant multi-path communication system rationally allocates network resources to the managed video streams and balances bandwidth against latency in order to avoid network congestion and safety issues associated with single-path transmissions. In other embodiments, a similar communication system that transmits video or other real-time messages between a source and a sink may be utilized in cloud robotics applications.

Methods for transporting a media call between an IMS server and a User Equipment (UE) and of handing over the media call between a cellular network and a WLAN are provided. In an embodiment, the media call data and signaling are split such that the data is transported over the WLAN and the signaling is transported over the cellular network. In another embodiment, handover latency is reduced by using a dual registration process that registers the UE with an IMS server using both a WLAN-based contact and a cellular network-based contact. The media call can then be carried over the WLAN and/or the cellular network and can be handed over seamlessly from one to the other within minimal signaling.

The present disclosure enables a UE (100) to discover a P-CSCF (85) in the IMS network based on the services offered by the P-CSCF or the area served by the P-CSCF (85) when it establishes a data session. The P-CSCF (85) registers with a discovery node (70) in the wireless communication network (10) and provides relevant information about the P-CSCF (85) to the discovery node (70), such as the type of services provided, its network address and/or FQDN, a list of cells supported, and a list of tracking areas supported. When a request is received to establish a session with the IMS for a UE, the SMF (45) in the wireless communication network (10) queries the discovery node (70) to fetch the P-CSCF (85) information and forwards the P-CSCF information to the requesting UE. The UE (100) selects a P-CSCF (85) to use when it initiates IMS registration.