A reference signal (RS) transmission system to transmit a channel state information (CSI) RS for extraction of CSI to a relay and a macro terminal is disclosed. The base station transmits information on a sub frame containing the CSI RS to the relay or the macro terminal. The macro terminal and the relay receive the CSI RS using the information on the sub frame. The macro terminal and the relay extract the CSI using the CSI RS and transmit the extracted CSI to the base station.

Example aspects include a method, apparatus, and computer-readable medium for detecting a repeater on a propagation path at a transmitting device of a wireless communication network, comprising receiving a repeater detection configuration indicating a detection threshold and at least one transmit power level. The aspects further include transmitting a first signal at a first power level. Additionally, the aspects include receiving first measurement results of the first signal. Additionally, the aspects include transmitting a second signal at a second power level. The second power level being different than the first power level. Additionally, the aspects include receiving second measurement results of the second signal. Additionally, the aspects include detecting an active repeater on the propagation path in response to a difference between the first measurement results and the second measurement results satisfying the detection threshold.

An electronic device for a backhaul network, wherein the backhaul network comprises a first communication apparatus connected to a core network and a plurality of second communication apparatuses performing wireless communication with the first communication apparatus, includes: processing circuitry configured to perform control to cause the first communication apparatus comprising the electronic device to: operate as a primary donor; select at least one second communication apparatus of the plurality of second communication apparatuses as a secondary donor; transmit a first indicating signal to the selected at least one second communication apparatus, the first indicating signal comprising node type information indicating the secondary donor; transmit a second indicating signal to a second communication apparatus that are not selected, the second indicating signal comprising node type information indicating a member node.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may receive a random access channel (RACH) message. The base station may determine, based at least in part on the RACH message, whether the RACH message was transmitted directly to the base station by a user equipment (UE) or whether the RACH message was relayed from the UE to the base station via a millimeter wave repeater. The base station may perform a beam management procedure based at least in part on the determination. Numerous other aspects are provided.

A system and method for providing communication in a distributed LMR system architecture is provided herein, wherein the system includes a plurality of LMR subsystems interconnected by a data network. In some embodiments, a subsystem may include a distributed simulcast architecture comprising a plurality of LMR sites, each site having a subsystem controller and a plurality of repeaters. In one embodiment, one subsystem controller operates in an active mode and the remaining subsystem controllers operate in standby to provide redundancy. The repeaters include integrated voter comparator and simulcast controller functionality and circuitry. In some embodiments, the repeaters are operable in an active or standby mode, wherein repeaters in the active mode perform voter comparator and simulcast controller functionality. The distributed simulcast architecture provides simulcast controller and voter comparator redundancy, network failure redundancy, and site redundancy.

Embodiments of this disclosure provide a relay selection method and apparatus and a system. The method includes: relay equipment broadcasts relay discovery information, the relay discovery information including identifier information (a relay UE ID) of the relay equipment and identifier information (a cell ID) of a serving cell of the relay equipment, so that remote terminal receiving the relay discovery information selects relay equipment according to the relay discovery information or transmits relay information of discovered relay equipment to an eNB, thus the eNB may select relay equipment for the remote terminal. With the embodiments of this disclosure, the serving cell may learn a cell where a relay to which the terminal accesses is located, so as to perform configuration for the terminal or perform path switching of downlink data.

Cellular communications, such as 5G cellular, may be a primary link between cell phones and a base station. Such cellular communications may be desirable, due to a high link rate. When the cellular communications are denied, a tactical waveform may be used to bridge communications between the cell phones and the base station. The tactical waveform may be transmitted between tactical radios coupled with the cell phones. The tactical radios may include an application layer coupled with an application layer of the cell phone, such that an application-specific integrated circuit (ASIC) of the cell phone may remain unchanged.

Disclosed is a system for assisting blasting. The system includes at least one wireless blasting-related device that is deployable or deployed proximate to or within a portion of physical media intended to be blasted as part of a commercial blasting operation. The blasting-related device includes a device-based magnetic induction (MI) signal receiver with a magnetometer configured for through the earth (TTE) MI communication, and the blasting-related device includes a device-based MI signal source with a device-based antenna configured for TTE MI communication. The device-based MI signal source is configured to communicate with a vehicle-based MI signal receiver in a blast support vehicle that includes a set of vehicle-based magnetometers.

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 relay selection method and apparatus and a system. The method includes: relay equipment broadcasts relay discovery information, the relay discovery information including identifier information (a relay UE ID) of the relay equipment and identifier information (a cell ID) of a serving cell of the relay equipment, so that remote terminal receiving the relay discovery information selects relay equipment according to the relay discovery information or transmits relay information of discovered relay equipment to an eNB, thus the eNB may select relay equipment for the remote terminal. With certain embodiments, the serving cell may learn a cell where a relay to which the terminal accesses is located, so as to perform configuration for the terminal or perform path switching of downlink data.