This invention presents methods comprising a BS with a plural of antennas capable of beamforming two or more spatial multiplexed streams with two or more antennas on UEs; using one or more of relays to project the capacity of the BS to cover one or more UEs; the BS estimating the uplink channel state information (CSI) between each antenna on the BS and each antenna on the one or more UEs using pilots transmitted from the UE antennas in the presence of the relays which amplifies and forwards the one or more pilots; and, the BS making use of the perseverance of the reciprocity of the over the air channel by the symmetry of the DL and UL paths of the relays to obtain the downlink CSI using the estimated uplink CSI that includes the effect of the relays.

Embodiments of the present application provide a method and apparatus of communication between a terminal and a base station. The communication method between a terminal and a base station performed by the terminal includes: sending, by the terminal, a network access request frame with a first preamble to a relay device. The relay device may be configured to receive the network access request frame according to the first preamble, send the network access request frame with a second preamble to the base station, and receive a network access response frame returned by the base station. The length of the second preamble may be smaller than that of the first preamble. The communication method may further includes receiving, by the terminal, the network access response frame sent by the relay device.

Certain aspects of the present disclosure provide compression schemes for relaying prior to decoding. A method that may be performed by a wireless relay node includes receiving, from a transmitter node, a first packet intended for a receiver node, compressing pre-decoded samples of the first packet according to a compression scheme, and transmitting, to the receiver node, a second packet including the compressed pre-decoded samples.

There is provided a communication relay device including at least one memory, and at least one processor coupled to the at least one memory, respectively, and the at least one processor configured to relay messages exchanged between a first wireless-base-station and a first wireless-network-side-device, or between a second wireless-base-station and a second wireless-network-side-device, acquire, from the messages, first and second statistic-information related to call processing between first and second wireless-base-stations and first and second wireless-network-side-devices, respectively, determine, in accordance with a number of first and second terminal-devices coupled to the first and second wireless-base-stations, respectively, included in first second statistic-information, respectively, an order of establishment of first and second communication sessions between the first and second wireless-base-stations and the first and second wireless-network-side-devices, respectively, and establish, when switching of a path of relaying a communication is performed, the first and second communication sessions in accordance with the order of establishment.

Various aspects of the present disclosure generally relate to wireless communication. A source user equipment (UE) may transmit, to a relay UE, information identifying that the relay UE is one of a plurality of relay UEs selected for cooperative relaying of a communication from the source UE to a destination UE. A channel between the source UE and the relay UE may be one of a plurality of channels comprising a channel between the source UE and each relay UE of the plurality of relay UEs. The plurality of relay UEs may be selected based at least in part on a degree of correlation of the channel between the source UE and the relay UE with at least one other channel of the plurality of channels. The UE may transmit the communication to the plurality of relay UEs for cooperative relaying to the destination UE. Numerous other aspects are described.

A repeater node of a telecommunications network wirelessly communicates with a parent node and another node. The repeater node comprises receiver circuitry, processor circuitry, and transmitter circuitry. The receiver circuitry is configured to receive a frame of information from the parent node. The processor circuitry is configured to include a customized control signal in the frame of information received from the parent node. The customized control signal is customized for the repeater node. The transmitter circuitry is configured to transmit the frame of information which includes the customized control signal to the other node which may be a wireless terminal.

A method, a computer-readable medium, and an apparatus are provided. The apparatus may be a repeater node. The apparatus may receive, at one or more first antennas of the node, a first signal via at least one first beam. The apparatus may measure, at one or more third antennas of the node, at least one of a power or a quality of at least one third beam. The at least one of the power or the quality of the at least one third beam may be measured at a same time as the first signal is received. The apparatus may forward, at one or more second antennas of the node, the first signal via at least one second beam.

A signal transmission method, an information indication method, and a related device are provided. The signal transmission method includes: obtaining operating parameter indication information of a second device; and transmitting/receiving a first signal to/from a third device based on the operating parameter indication information, where the transmitting/receiving a first signal to/from a third device includes transmitting/receiving the first signal to/from the third device via the second device, or the transmitting/receiving a first signal to/from a third device includes transmitting/receiving the first signal to/from the third device directly.

A technique includes sending, by a relay node to a candidate base station via a base station-to-base station connection, a request for transmission of reference signals, wherein the base station-to-base station connection includes, at least in part, a wireless connection; receiving, by the relay node from the candidate base station, a reference signal configuration; and measuring one or more signal parameters of one or more received reference signals based on the received reference signal configuration.

Aspects described herein relate to receiving, at a repeater and from a serving base station, one or more transmitted downlink beams, receiving, at the repeater and from a downstream node served by the serving base station, one or more transmitted uplink beams, and transmitting, to the serving base station, one or more parameters related to determining a channel quality metric using at least the one or more transmitted downlink beams and the one or more transmitted uplink beams.