A relay apparatus receives a first message from a first terminal device; and sends the first message when the relay apparatus determines that data of a target application is allowed to be transmitted through the relay apparatus. The relay apparatus stops sending the first message when the relay apparatus determines that the data of the target application is not allowed to be transmitted through the relay apparatus. The first message includes relay service indication information, and the relay service indication information is used to indicate the first terminal device to request to establish a relay link.

A telecommunications system for a mine with tunnels having a plurality of nodes disposed in the tunnels in the mine which provides communication through WiFi with devices in the mine. Each node having a housing defining an enclosure, a first radio with a first antenna disposed at least partially in the enclosure within the housing directed for communication in a first direction relative to the node, a second radio with a second antenna disposed at least partially in the enclosure within the housing directed for communication in a second direction essentially opposite the first direction, and a power supply in electrical communication with the first and second radios to power the first and second radios. A method of a telecommunications system for a mine. A method of a Wifi node for a mine. A Wifi node for a mine. An apparatus for holding an object in a mine.

A telecommunications system for a mine with tunnels having a plurality of nodes disposed in the tunnels in the mine which provides communication through WiFi with devices in the mine. Each node having a housing defining an enclosure, a first radio with a first antenna disposed at least partially in the enclosure within the housing directed for communication in a first direction relative to the node, a second radio with a second antenna disposed at least partially in the enclosure within the housing directed for communication in a second direction essentially opposite the first direction, and a power supply in electrical communication with the first and second radios to power the first and second radios. A method of a telecommunications system for a mine. A method of a Wifi node for a mine. A Wifi node for a mine. An apparatus for holding an object in a mine.

An optically-enhanced relay including a first transmitter that converts a first digital transmit signal to a first analog transmit signal, a first receiver that converts a first analog receive signal to a first digital receive signal, a second transmitter that converts a second digital transmit signal to a second analog transmit signal, a second receiver that converts a second analog receive signal to a second digital receive signal, and an optically-enhanced analog self-interference canceller that generates a first self-interference cancellation signal based on at least one of the first digital transmit signal and the first analog transmit signal, and combines the first self-interference cancellation signal with at least one of the first digital receive signal and the first analog receive signal.

Spatial redistributors and methods of redistributing signals in accordance with various embodiments of the invention are illustrated. One embodiment includes an array of channels configured to receive and retransmit a signal, where each of a plurality of independently operating channels in the array includes: at least one antenna element; an RF chain configured to apply at least a time delay to the received signal prior to retransmission; control circuitry configured to control the time delay applied to the received signal by the RF chain; and a reference oscillator. In addition, the array of channels is configured to redirect a signal received from a first set of directions for retransmission in a second set of directions; and the control circuitry of the channels in the array of channels coordinates the time delays applied to the received signal across the array of channels to control the wave front of the retransmitted signal.

A radio module for a wireless communication node in a wireless mesh network includes a reflectarray antenna having a plurality of antenna elements. Each antenna element of the plurality of antenna elements is configured to receive an incident signal, apply one of two phase shifts to the incident signal, and radiate the phase-shifted signal. The radio module further includes a radio frequency (RF) module comprising a single RF chain configured to feed the incident signal to the plurality of antenna elements in the reflectarray antenna, as well as a control unit that is configured to control which of the two phase shifts is applied by each antenna element in the reflectarray antenna.

This application provides a communication method and apparatus, and relates to the field of communication technologies. The method includes: a relay terminal detects that a link fault occurs on a first link, wherein the first link is a link between the relay terminal and a remote terminal; and the relay terminal sends first notification information to the access network device, wherein the first notification information is for notifying the access network device that a link fault occurs on the first link.

Methods, systems, and devices for wireless communications are described. A relay device operating in an unlicensed radio frequency (RF) spectrum band may receive a channel occupancy time (COT) indication from a first wireless device via a control message, a preamble sequence, or an on-off energy pattern, among other examples. Upon receiving the COT indication from the first wireless device, the relay device may perform a listen before talk (LBT) procedure. If the LBT procedure is successful, the relay device may relay signals between the first wireless device and the second wireless device. Otherwise, the relay device may refrain from relaying signals between the first wireless device and the second wireless device. The described techniques may enable the relay device to operate with greater efficiency and reduced power consumption. The described techniques may also improve the reliability of communications between the first wireless device and the second wireless device.

One earth station transmits an address of a source to another earth station (or HUB station), and the other earth station (or HUB station) stores the address in an address management table in association with the one earth station that has transmitted the address of the source and reads, from destination packet data that is packet data including an address of a destination, the address of the destination, and the other earth station (or HUB station) transmits the destination packet data to the associated earth station with reference to the address management table.

A method and device are disclosed for Sidelink Relay Adaptation Protocol (SRAP) Data Protocol Data Unit (PDU) discarding. In one embodiment, the method includes a relay UE establishing a PC5 connection with a remote UE. The method further includes the relay UE receiving a SRAP Data PDU from the remote UE. The method also includes the relay UE preventing from discarding the SRAP Data PDU if the SRAP Data PDU is the first SRAP Data PDU received from the remote UE via SL-RLC1, wherein a header of the first SRAP Data PDU contains a UE Identity/Identifier (ID) of the remote UE, and the UE ID of the remote UE is not included in any SRAP configuration of the relay UE.