An electronic control unit includes a relay device that is connected via a first network with a different relay device included in a different electronic control unit to relay a frame via the first network. It is determined whether a reception interruption has occurred. The reception interruption signifies that at least one predetermined frame scheduled to be transmitted from the different relay device is not received within a predetermined time via the first network. In response to the reception interruption being determined to have occurred, it is determined whether an abnormality has occurred in the first network based on at least one of (i) a presence or absence of reception of a state data representing a state of the different electronic control unit from the different electronic control unit via a second network within a fixed time, and (ii) a content of the state data.

A control device (100) comprises a processor (101) and a transmitter (103) is provided; wherein the processor (101) is configured to generate a composite beam control signal S which comprises antenna beam control information for communication nodes of a communication path; wherein the transmitter (103) is configured to transmit the composite beam control signal S to at least one communication node. A communication node (300) comprises a processor (301), a transceiver (303), reception antenna elements (305) and transmission antenna elements (307) is provided; the transceiver (303) is configured to receive a composite beam control signal S; the processor (301) is configured to derive antenna beam control information associated with the communication node (300) from the composite beam control signal S; and control the beam of the reception antenna elements (305) or the beam of the transmission antenna elements (307) according to the antenna beam control information.

A method and apparatus for transmitting reference signals in a relay communication system are provided. The method transmits reference signals via a type 2 relay node in a relay communication system and includes a base station (BS) allocating a plurality of antenna ports in a mutually exclusive manner so that the antenna port of the BS and the antenna port of a peripheral relay node do not overlap each other, the BS and relay node transmitting reference signals to a user equipment (UE) via the corresponding antenna ports that are mutually exclusively allocated and the BS receiving channel state information from the UE to obtain channel state information between the BS and the UE and channel state information between the relay node and the UE.

Various systems and methods disclosed herein describe improvements for beam management that leverage virtualization across a vertical polarization (V-Pol) and horizontal polarization (H-Pol). One or more of a user equipment (UE) and a base station may include an antenna array comprising V-Pol antenna elements and H-Pol antenna elements. The UE may determine a number of receive (Rx) beam of an Rx beam sweep are needed, signal this number to the base station, and perform the beam sweep according to one or both of the V-Pol and H-Pol. A UE may use group based beam reporting to indicate to the base station a transmit (Tx) beam upon which downlink MIMO using V-Pol and H-Pol may be supported by reporting a same transmission configuration indication (TCI) corresponding to the Tx beam for both a first Rx beam and a second Rx beam in a group based beam reporting message.

This disclosure provides systems, apparatus, methods, and computer-readable media for beam switching by a repeater node that forwards communications from one of a first node or a second node to the other of the first node or the second node. For example, after a change of position by the second node, the first node may provide the repeater node an instruction to perform a beam change operation to communicate with the second node. In some aspects, performing the beam change operation by the repeater node may improve reliability of wireless communications, such as by focusing signal energy in a particular direction. Further, a beam change delay time interval or a scheduling of the beam change delay time interval may be selected based on scheduling associated with other nodes, which may reduce a number of messages sent to the repeater node (such as by reducing instructions to change beam directions).

A wireless communication system, an apparatus and a method for integrating communication and sensing functions in the wireless communication system are provided. The communication device includes a communication unit for bi-directional communication, and a radar unit for sensing. The communication unit and the radar unit may commonly include a common transmit chain which generates a transmit signal. The transmit signal may have a first polarization. The communication unit may include a communication receive chain, and if a receive signal has the first polarization in response to the transmit signal, the communication receive chain may receive the receive signal having the first polarization via the hybrid coupler and perform communication and if the receive signal corresponding to the transmit signal has second polarization different from the first polarization, a sensing receive chain of the radar unit may receive the receive signal having the second polarization perform sensing by the radar unit.

A multi-sector antenna system is disclosed that includes two or more flat panel antennas facing different directions and configured to communicate with two separate sites using millimeter wave RF signals. A processing module is communicatively coupled to each of the flat panel antennas. In some embodiments, the processing module may be configured to receive incoming RF signals from a first site via a first flat panel antenna, convert the incoming RF signals to outgoing RF signals, and transmit the outgoing RF signals to a second site via the second flat panel antenna. The flat panel antennas may be configured to transmit and receive RF signals at frequencies in the range of about 57 GHz to 86 GHz. The multi-sector antenna system may be utilized in a mesh network system.

Methods and systems are provided for relocatable repeaters for wireless communication links to locations that may present accessibility problems using, for example, small unmanned aerial systems (sUAS). An sUAS implemented as an easy-to-operate, small vertical take-off and landing (VTOL) aircraft with hovering capability for holding station position may provide an extended range, highly secure, high data rate, repeater system for extending the range of point-to-point wireless communication links (also referred to as “crosslinks”) in which repeater locations are easily relocatable with very fast set-up and relocating times. A repeater system using beam forming and power combining techniques enables a very high gain antenna array with very narrow beam width and superb pointing accuracy. The aircraft includes a control system enabling three-dimensional pointing and sustaining directivity of the beam independently of flight path of the aircraft.

A radio-relay communication system having a radio-frequency transceiver units and a beam-scanning antenna is provided. It is configured for electronic scanning by switching between primary antenna elements. The system provides electronic scanning without losses or with low losses with each radio-frequency transceiver unit being electrically connected to at least one primary antenna element of the beam-scanning antenna. The antenna beam scanning is accomplished through the signal distribution units selecting at least one of radio-frequency transceiver units for processing of the received and generation of the transmitted signals in a given spatial direction.

A mobile vehicle repeater antenna system, comprising: a scanning antenna system comprising one or more scanning antennas, wherein the one or more scanning antennas are configured to receive, for at least a first azimuth heading value and a second azimuth heading value, data comprising mobile communication signal and network parameters, a donor antenna system comprising one or more antennas, wherein the one or more antennas are configured to receive and transmit mobile communication signals, a controller connected to the scanning antenna system and the donor antenna system, wherein the controller is configured to compare the received data for the at least first azimuth heading value and the second azimuth heading value; determine whether the first azimuth heading value or the second azimuth heading value provides optimal network and signal parameters according to predefined criteria; and control operation of the one or more antennas of the donor antenna system in accordance with the determination.