One or more timers can be used by an originating UE during setup of a communication session. The timer(s) can be triggered by an originating UE sending a request or receiving a response that uses a first signaling protocol. The timer(s) can further be terminated by the originating UE sending a request or receiving a response that uses a second signaling protocol different from the first signaling protocol, so long as the request/response using the second signaling protocol occurs before timeout of the timer(s).

Aspects of the present disclosure provide techniques and apparatus for wireless communication, and more particularly, increasing network coverage using rate adaption. The techniques include adjusting a cell transition threshold based on, for example, maximum packet loss rates (PLRs) for a VOIP terminal, for example, taking into consideration application layer redundancy employed at the terminal. Numerous other aspects are provided.

Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety related services, and the like) on the basis of 5G communication technology and IoT related technologies. The present disclosure relates to a method by which a terminal receives a circuit switching (CS) service, and according to the present disclosure, the method by which a terminal receives a CS service, comprises the steps of: transmitting a CS fallback (CSFB) request to a mobility management entity (MME) through a first base station in order to use the CS service; detecting the failure of a radio resource connection to the first base station; and transmitting, to a second base station, a radio resource re-establishment related message including a CSFB indicator for identifying the CSFB request.

A mobile device capable of connecting to a voice service using Voice over LTE (VoLTE) via a cellular network and Voice over Wi-Fi (VoWiFi) via a wireless local area network is connected to VoWiFi and arranged to receive notifications from a wireless access point when the voice service via VoWiFi is disrupted and to disconnect from VoWiFi and connect to VoLTE to maintain the voice service. The mobile device is operable to test the connection to the cellular network and if the cellular network connection is insufficient to support VoLTE, the mobile device ignored the notification and remains connected to VoWiFi.

A method comprises detecting (402) QUIC packets transmitted (401, 406) between network elements (UE, content server) of a communication system. Based on a detected QUIC packet, the method comprises obtaining (403), at a first measurement point and at a second measurement point, user plane customer experience measurement information and optionally context information. The method comprises providing (404), to the first measurement point, user plane customer experience measurement information and optionally context information, obtained at the second measurement point. The method comprises correlating (405) user plane customer experience measurement information obtained at the first measurement point, with user plane customer experience measurement information received from the second measurement point, by using context information obtained at the first measurement point and context information received at the first measurement point.

A traffic hub used in mobile communications for data offloading, diversion and security. The traffic hub includes an Evolved Packet Data Gateway (ePDG) module configured to transmit and receive data packets for a mobile device in Roaming Untrusted Wi-Fi network for secured access to an Evolved Packet Core (EPC) network, a Trusted WLAN Access Gateway (TWAG) module configured to transmit and receive the data packets for a mobile device in Roaming Trusted Wi-Fi network for secured access to the EPC network and a General Packet Radio Service (GPRS) Tunneling Protocol (GTP) Proxy (GProxy) module, the GProxy module being the core module of the traffic hub configured to enforce policy rules on the data packets prior to exchanging the data packets with logically selected Peer Gateway General Packet Radio Service (GPRS) Serving Node (GGSN)/Packet Data Network (PDN) Gateway (PGW) and ePDG/TWAG nodes. The GProxy also operates as a GTP-aware firewall to protect Home GGSN/PGW nodes from malicious traffic.

Technology for transcoding avoidance is disclosed. A mobile switching center (MSC) server can decode a single radio voice call continuity (SRVCC) packet switch (PS) to circuit switched (CS) request message received from a mobility management entity (MME) that includes selected CODEC information for a selected CODEC used for a user equipment (UE) in an internet protocol (IP) Multimedia Subsystem (IMS) over long term evolution (LTE) system. The MSC server can encode the selected CODEC information for transmission to a target MSC to enable the target MSC to identify the selected CODEC for the UE to allow the selected CODEC to be used in the CS domain.

A UE determines a set of RATs available in accordance with a first subscriber identity associated with a first network and a second subscriber identity associated with a second network. When the set includes a first RAT accessing a base station in the first network, a second RAT accessing a base station in the second network, and a third RAT accessing an access point of a WLAN, the UE selects, in a first performance configuration, the first RAT to establish a first call under the first subscriber identity. The UE further communicates, under the first subscriber identity, with a first IMS server of the first network through the first RAT to establish the first call. The UE maintains, under the second subscriber identity, a connection with a second IMS server of the second network through the first RAT or the third RAT when the first call is active.

This disclosure relates to a mobile device, comprising: a receiver configured to receive a radio signal comprising transmissions from a plurality of radio cells; and a processor configured to derive second information from the received radio signal, the second information indicating at least one neighboring radio cell, wherein the processor is configured to initiate a radio cell selection based on the second information if the second information indicates at least one neighboring radio cell configured for the first RAT.

The present disclosure generally relates to aspects of applying policy and charging rules to bearers in a communication network. The policy and charging rules are provided for application to at least a dedicated bearer. The technique presented herein may be implemented in connection with a mobile terminal moving between an access point of a first type supporting default and dedicated bearers and an access point of a second type supporting default and not supporting dedicated bearers. A method embodiment of the present disclosure removes an established dedicated bearer and temporarily suspends application of the rules to the dedicated bearer upon a move from an access point of the first type to an access point of the second type. A network endpoint of an ongoing session kept agnostic of the removal of the dedicated bearer. Upon a move from the access point of the second type to an access point of the first type, the dedicated bearer is re-established and the rules are re-applied to the re-established dedicated bearer.