Methods, apparatus, computer program products for exchange data among air-gapped devices are provided. The method comprises: identifying, by a device in a cluster of devices, a plurality of accessible devices in the cluster via corresponding respective quick response (QR) codes; generating, by the device, logical routing information based on the identified plurality of accessible devices, the logical routing information comprising at least identifiers of the identified plurality of accessible devices; and transmitting, by the device, data encoded in a plurality of QR codes to a destination device in the cluster based on a shortest routing path identified in the logical routing information.

A method for generating a shared secret is disclosed. In an example embodiment, a sequence of data packets is transmitted from a first node to a second node. A packet error bitmap corresponding to packets in the sequence of packets that are received correctly in a first transmission attempt is generated at the second node. Further, the packet error bitmap is transmitted from the second node to the first node. Then, the first node and the second node separately mixes the packets received correctly in the first transmission attempt to generate the shared secret.

A method and an apparatus for improving reliability of multicast broadcast service (MBS) service, a terminal device, and a network device are provided. The method includes the following. A terminal device determines a transmission mode of an MBS service. The terminal device determines, based on the transmission mode of the MBS service, whether a first transmission is new transmission or is retransmission.

The present invention relates generally to the field of virtual private networks. More specifically, the present invention relates to a broadcast system for a virtual private network that broadcasts via a mesh network. Further, the system makes use of a broadcast source server which allocates data from data packets to specific nodes within a location-based regiment database. The database then uses an AI optimization system which further minimizes latency versus standard IP UDP broadcast systems.

Systems, apparatuses, and methods are described for monitoring data transmitted and/or received via multicast transmission and, based on latency, segment loss, and/or other occurrence, modifying sources and/or other characteristics of additional data transmission. The data may be video segments of media content items. Sources of video segments can be changed based on comparisons of rates of arrival of video segments, failure to receive segments, etc. Selection of an encoded version of content for multicast and/or unicast transmission may be based on indications of delay and/or non-receipt, and/or based on predictions of increased load on a network.

A system and method for broadcast response generally employing RDS, DARC, or similar technology is provided, including a method for responding to a broadcast comprising extracting an event identifier from a broadcast signal; detecting a response by a user to the broadcast signal; polling a communications device to determine a user identifier; and communicating the event identifier and the user identifier when the user response is detected.

Methods, apparatus, systems and procedures to manage a multicast communication to a multicast group implemented by a respective wireless transmit/receive unit (WTRU) of WTRUs in the multicast group are disclosed. One representative method includes receiving, by the respective WTRU of the multicast group, a configuration, the configuration indicating a Random Access Channel (RACH) preamble to use for a negative acknowledgement (NACK) response to a multicast transmission to the respective WTRU, monitoring, by the respective WTRU, for data of the multicast transmission, determining, by the respective WTRU, whether the monitored for data was successfully received; and on condition that the monitored for data was not successfully received, sending, by the respective WTRU, the RACH preamble indicated by the received configuration.

Methods, devices, and systems for operating a fire system network are described herein. One method includes receiving a plurality of time-slotted maintenance messages over a period of time from each of a plurality of fire system devices located in a facility via a first spreading factor, receiving an event message from a fire system device of the plurality of fire system devices responsive to the fire system device determining a fire event, the event message sent via a second spreading factor, and sending a block actuate message to the plurality of fire system devices responsive to receiving the event message, wherein the block actuate message is configured to activate a fire alarm.

A virtual meeting server and method to provide automatic status notifications of screensharing status between a presenter device sharing a screen with at least one participant device during a screensharing session, including a channel module to establish and maintain communication channels between the presenter and participant devices for transmitting signals to set up the screensharing session and data, including content frames, used in the screensharing session, a detection module to detect an acknowledgement response that the participant device has received the content, an analysis engine to analyze and determine a status of the screensharing session based on analyzing the acknowledgement response, and a notification module to send a status notification to the presenter device and the participant device, wherein the status notification indicates whether connection for the screensharing session has been established and is being maintained between the presenter device and the participant device.

Software defined network orchestration to manage media flows for broadcast with public cloud networks is provided by identifying a media flow at a media production facility for multicast transmission; registering the media flow to a registration database; migrating the media flow from multicast transmission to unicast transmission; transmitting the media flow to a public cloud network facility; and updating the registration database with a location of the media flow in the public cloud network facility. Once registered, a media flow management system allows any authorized device to request for a media flow; and in response locates the media flow based on a registration database indicating a location of the media flow (whether in the public cloud network facility, on a common carrier, or in a production facility); receives access to the media flow at the location; and allows the authorized device to consume the media flow.