A method and apparatus for synchronizing group video is provided herein. Upon a triggering event, users viewing a video over an LTE network will transmit synchronization information (e.g., a frame number, or a time stamp of the video frame, . . . , etc.) over an LMR and/or LTE network. In response, user devices will synchronize to the same spot in the video.

An information processing apparatus that receives image data from a server apparatus, comprising: a generation unit configured to generate a push instruction that includes identification information regarding one or more projection methods of a plurality of projection methods that are applicable to a projection target image; a transmitting unit configured to transmit a push instruction generated by the generation unit to the server apparatus; and a receiving unit configured to receive image data pushed from the server apparatus in response to a push instruction transmitted by the transmitting unit, the image data being generated by projecting a projection target image, using a projection method that is decided based on identification information that is included in the push instruction.

A media file pushing method, a media file server, and a media file pushing system relate to the field of communications technologies and are configured to resolve a problem that a user cannot quickly obtain a media file satisfying a pushing requirement of the user. The method includes obtaining search information from a user, where the search information includes time information, and the time information indicates a requirement of the user on playback duration of a media file, determining playback content of the media file based on a preset content determining rule, obtaining at least one target media file satisfying the time information and the playback content from a media file resource library based on the time information and the playback content of the media file, and presenting the at least one target media file in a pushing interface.

The present invention relates generally to data and signal routing. More particularly, the present invention relates to certain new and useful advances in invitation routing for conference sessions, of which the following is a specification, reference being had to the drawings accompanying and forming a part of the same. Conferencing through various forms of media has rapidly evolved in the last few decades, particularly due to the introduction of low-cost, high-capacity communications networks. Videoconferencing and videophone calling, in particular, have made significant strides due in part to the development of tablet computers and smart phones, but also globalization of the market.

A method and apparatus for synchronizing group video is provided herein. Upon a triggering event, users viewing a video over an LTE network will transmit synchronization information (e.g., a frame number, or a time stamp of the video frame, . . . , etc.) over an LMR and/or LTE network. In response, user devices will synchronize to the same spot in the video.

Embodiments herein provide a method for managing a floor request in a mission critical communication system. The method includes receiving a floor request message from a first floor participant and determining that a call type of the first floor participant is identical to a call type of a second floor participant, wherein a floor is currently occupied by the second floor participant. Further, the method includes managing the floor request of the first floor participant based on an effective priority of the floor request.

Method and management server for revoking group server identifiers of compromised group servers. One method includes determining, with a management server, an identity-based cryptographic signing key based on a group server identifier. The method also includes distributing, via the management server, the identity-based cryptographic signing key to a group server. The method further includes receiving, at the management server, a security status indicating that the security of the group server is compromised. The method also includes, responsive to receiving the security status, distributing, via the management server, a revocation of the group server identifier to a plurality of communication devices.

Embodiments include a system, method, and computer program product for providing seamless PTT services to a user. In an embodiment, a push-to-talk (PTT) component provides, to the user, PTT services with a talk group through connectivity to a data channel in a mobile network. A voice monitoring component monitors attributes of data connectivity on the data channel to determine when a voice quality falls below a threshold. When the voice quality is determined to fall below the threshold, a connectivity component requests the user to switch the connectivity to a voice channel. Then, the connectivity component dials a telephone number through the voice channel to access a voice conference bridge that provides the PTT services. To provide the PTT services, the voice conference bridge sets up a routing path to a session initiation protocol (SIP) session for the talk group, and routes voice communication through the SIP session.

In some examples, a first push-to-talk (PTT) client that has access to a wide area network (WAN) performs distributed control for a PTT session in conjunction with distributed control for the PTT session performed by another PTT client in the PTT session, the distributed control by the first PTT client performed without use of any PTT server.

Input/output (I/O) operation requests from pageable storage mode guests are interpreted without host intervention. In a pageable mode virtual environment, requests issued by pageable storage mode guests are processed by one or more processors of the environment absent intervention from one or more hosts of the environment. Processing of the requests includes manipulating, by at least one processor on behalf of the guests, buffer state information stored in host storage. The manipulating is performed via instructions initiated by the guests and processed by one or more of the processors.