In an audio apparatus including a first device and a second device that each receive the same audio data transmitted from a source device, a device having the worse reception environment of the audio data out of the first device and the second device, operates as a primary device that performs a retransmission request for the audio data to the source device, and a device having the better reception environment operates as a secondary device that performs the retransmission request for the audio data to the primary device.

A modular mobility base for a modular autonomous bot apparatus transporting an item being shipped including a mobile base platform, a component alignment interface, a mobility controller, a propulsion and steering system, and sensors. The component alignment interface provides an alignment channel into which another modular component can be placed and secured on the platform. The mobility controller generates propulsion control signals for controlling speed of the modular mobility base and steering control signals for navigation of the modular mobility base. The propulsion system is connected to the platform and responsive to the propulsion control signal. The steering system is connected to the mobile base platform and is responsive to the steering control signal to cause changes to directional movement of the modular mobility base. The sensors are disposed on the platform provide feedback sensor data to the mobility controller about a condition of the modular mobility base.

A method for reactivating a wireless communication network in accordance with one of the IEEE 802.11 standards is described. The communication network includes a plurality of gathering nodes, each gathering node includes at least one access-point and/or user radio-frequency interface and/or a user of a so-called backhaul wireless network associated with the communication network, which are deactivated in sending mode, A beacon frame sent by a master node of the reactivation method is propagated gradually in order to reactivate all the nodes in the network.

Disclosed is a lighting control system for directing a show. The system includes at least: a master device; and a plurality of slave devices that receive lighting control signals from the master device. The light control signals correspond to seats of a plurality of audiences in an auditorium. The plurality of slave devices receive position information indicating specific positions at which the plurality of slave devices emit a light, light-emitting status information including preset information to classify the plurality of slave devices into a plurality of groups, and group identification number information. The plurality of slave devices are grouped in accordance with received information. The master device controls the grouped plurality of slave devices to emit a light per group basis by broadcasting the lighting control signals including group light-emitting pattern information for each of the plurality of groups of the plurality of slave devices.

A system and method dynamically schedule wireless transmissions without collision. A master transmitter periodically transmits a time mark during a first predefined time slot of a plurality of consecutive time slots that form a transmission block. Multiple consecutive transmission blocks form a frame. An announcement transmission from a wireless transmitting device is received via at least one receiver during a second predefined time slot of the plurality of time slots. An allocator allocates, at least partly based upon the received announcement transmission, a third time slot of the plurality of time slots to the wireless transmitting device. A time slot reservation area of at least one subsequently transmitted time mark includes indication of the allocation of the third time slot to the wireless transmitting device. The wireless transmitting device receives the subsequently transmitted time mark and transmits only during the third time slot of subsequent frames.

A system and method dynamically schedule wireless transmissions without collision. A master transmitter periodically transmits a time mark during a first predefined time slot of a plurality of consecutive time slots that form a transmission block. Multiple consecutive transmission blocks form a frame. An announcement transmission from a wireless transmitting device is received via at least one receiver during a second predefined time slot of the plurality of time slots. An allocator allocates, at least partly based upon the received announcement transmission, a third time slot of the plurality of time slots to the wireless transmitting device. A time slot reservation area of at least one subsequently transmitted time mark includes indication of the allocation of the third time slot to the wireless transmitting device. The wireless transmitting device receives the subsequently transmitted time mark and transmits only during the third time slot of subsequent frames.

The present disclosure relates to a method for transferring data, in which a peripheral device and a central device are wirelessly connected in accordance with the Bluetooth Low Energy (BLE) standard and a data packet is transferred within a transfer window of a Bluetooth Low Energy data channel between the peripheral device and the central device.

The present disclosure relates to a method for transferring data, in which a peripheral device and a central device are wirelessly connected in accordance with the Bluetooth Low Energy (BLE) standard and a data packet is transferred within a transfer window of a Bluetooth Low Energy data channel between the peripheral device and the central device.

A system supports communications of video and data to hand held devices located within a public venue (e.g., sports stadium). A pod includes at least one of a synchronized server and wireless communications electronics. The pod includes an antennae integrated therein. The pod can be deployed as a communications node within the public venue and provides data including video through a data network from at least one server to hand held wireless devices located in the public venue. The pod can include a rechargeable power source sustaining self-contained operation of the wireless communication electronics. An optional solar cell can provide electrical power to charge the rechargeable power source. A pod can be embedded in the wall or floor surface of said public venue and can be provided in the form of a core hole plug.

The invention relates to a method for establishing and maintaining a network having two or more subscribers, based on radio connections between the subscribers in accordance with a Bluetooth Low Energy (BLE) standard, each subscriber being uniquely characterized by way of a subscriber identifier (node ID). Provision is made in that context that clusters having one subscriber, or several subscribers connected by means of BLE network connections, are formed; that a unique cluster identifier (cluster ID) is allocated to each cluster; that a first subscriber of a first cluster selects a second subscriber, located within range of a BLE connection, from a second cluster that is smaller or of the same size, and causes it to be detached from the second cluster and integrated into the first cluster by way of a BLE network connection to the first subscriber. The invention further relates to a beacon for carrying out the method.