This disclosure describes a communication system associated with a radio access technology (RAT). The communication system includes an Internet protocol (IP) multimedia subsystem (IMS) server, and one or more processors configured to perform operations. The operations include receiving, from a user equipment device (UE) camped on the RAT, a request for IMS Packet Data Unit (PDU) establishment or IMS session initiation protocol (SIP) registration; sending to the UE a rejection message associated with the SIP registration or the IMS PDU establishment; receiving, from the UE, an IMS failure message that comprises an IMS failure cause; determining, based on the IMS failure message, whether the IMS failure cause is temporary or permanent; and responsive to determining that the IMS failure is temporary, temporarily disabling the RAT for the UE.

This disclosure describes techniques implemented partly by a communications service for identifying and altering undesirable portions of communication data, such as audio data and video data, from a communication session between computing devices. For example, the communications service may monitor the communications session to alter or remove undesirable audio data, such as a dog barking, a doorbell ringing, etc., and/or video data, such as rude gestures, inappropriate facial expressions, etc. The communications service may stream the communication data for the communication session partly through managed servers and analyze the communication data to detect undesirable portions. The communications service may alter or remove the portions of communication data received from a first user device, such as by filtering, refraining from transmitting, or modifying the undesirable portions. The communications service may send the modified communication data to a second user device engaged in the communication session after removing the undesirable portions.

Method, server, network node and multimedia User Equipment, UE, for controlling communication session establishment (10) in a multimedia over Internet Protocol, IP, based communications network with a plurality of multimedia UEs registered in the communications network with a same subscriber. In a communications handling server of the network, in reply to the receipt (12) of a request (11) for establishing a communication session with at least one UE of the plurality of UEs, an adapted request (13) is provided, based on which provisional response(s) and which final response(s) the UE of the plurality of UEs may provide, in response to the request (11) for establishing the communication session. The adapted request is forwarded (14) in the communications network, and a receiving UE processes the adapted request for establishing or not establishing the communication session (15).

Method, server, network node and multimedia User Equipment, UE, for controlling communication session establishment (10) in a multimedia over Internet Protocol, IP, based communications network with a plurality of multimedia UEs registered in the communications network with a same subscriber. In a communications handling server of the network, in reply to the receipt (12) of a request (11) for establishing a communication session with at least one UE of the plurality of UEs, an adapted request (13) is provided, based on which provisional response(s) and which final response(s) the UE of the plurality of UEs may provide, in response to the request (11) for establishing the communication session. The adapted request is forwarded (14) in the communications network, and a receiving UE processes the adapted request for establishing or not establishing the communication session (15).

The present disclosure provides a voice signaling transmission method and device. The voice signaling transmission method includes: sending, by a second device, a request signaling to a first device; receiving, by the second device, a signaling for requesting the second device to try a call sent by the first device, and sending a signaling for trying a call to the first device; receiving, by the second device, a ringing signaling sent by the first device and sending a temporary response signaling to the first device; and receiving, by the second device, a signaling for confirming the response and a signaling for confirming the request which are sent by the first device and sending a response signaling to the first device.

The present disclosure provides a voice signaling transmission method and device. The voice signaling transmission method includes: sending, by a second device, a request signaling to a first device; receiving, by the second device, a signaling for requesting the second device to try a call sent by the first device, and sending a signaling for trying a call to the first device; receiving, by the second device, a ringing signaling sent by the first device and sending a temporary response signaling to the first device; and receiving, by the second device, a signaling for confirming the response and a signaling for confirming the request which are sent by the first device and sending a response signaling to the first device.

In various aspects, a system that receives a first message, wherein the first message comprises a communication device identification and a feature tag having a language indication that indicates a language configuration of a user equipment. In response to the receiving the first message, storing the language indication and associating the language indication with the communication device identification. The system determines whether an incoming call is not authenticated and in response to the determining that the incoming call is not authenticated, transmitting a textual message to the communication device using the language configuration to indicate the incoming call is not authenticated.

In various aspects, a system that receives a first message, wherein the first message comprises a communication device identification and a feature tag having a language indication that indicates a language configuration of a user equipment. In response to the receiving the first message, storing the language indication and associating the language indication with the communication device identification. The system determines whether an incoming call is not authenticated and in response to the determining that the incoming call is not authenticated, transmitting a textual message to the communication device using the language configuration to indicate the incoming call is not authenticated.

Described herein are techniques, devices, and systems for handling Session Initiation Protocol (SIP) messages with malformed header fields. A communication device that receives a SIP message from an additional communication device may identify one or more identified header fields of a plurality of first header fields in a message header of the SIP message that correspond to (e.g., match) one or more second header fields in a list of second header fields accessible to the communication device. If the communication device determines that the one or more identified header fields are not malformed, the communication device may process the SIP message without regard to remaining header fields in the message header. If, however, the communication device determines that at least one identified header field of the one or more identified header fields is malformed, the communication device may reject the SIP message.

Described herein are techniques, devices, and systems for handling Session Initiation Protocol (SIP) messages with malformed header fields. A communication device that receives a SIP message from an additional communication device may identify one or more identified header fields of a plurality of first header fields in a message header of the SIP message that correspond to (e.g., match) one or more second header fields in a list of second header fields accessible to the communication device. If the communication device determines that the one or more identified header fields are not malformed, the communication device may process the SIP message without regard to remaining header fields in the message header. If, however, the communication device determines that at least one identified header field of the one or more identified header fields is malformed, the communication device may reject the SIP message.