PROSE TECHNOLOGIES (SUZHOU) CO., LTD.

A method for monitoring a distributed antenna system includes: at a relay device, receiving a first operation monitoring signal sent by the near-end device, where the first operation monitoring signal carries an operation monitoring message, and the operation monitoring message includes a device address of a monitoring target device; determining whether to analyze the first operation monitoring signal according to a connection status with the near-end device; in response to a determination to analyze the first operation monitoring message signal, analyzing the first operation monitoring signal to confirm the monitoring target device and to determine whether to respond to the operation monitoring message; and in response to a determination to respond to the operation monitoring message, responding to the operation monitoring message according to the monitoring target device as confirmed.

A 5G distributed system includes a near-end unit, a remote device, and an active antenna unit. The near-end unit transmits signals of multiple modes including 5G signal to the remote device. The remote device performs frequency conversion processing on 5G signal and does not perform frequency conversion processing on signals of other modes, such as 4G, and then outputs to the active antenna unit for coverage. In the present disclosure, the 5G signal is converted by frequency conversion at the remote device, and signals of other modes other than 5G signal are transmitted to the remote active antenna unit without being processed by frequency conversion for signal coverage, which satisfies the coverage requirements of 5G indoor distribution.

A network access device includes: a first signal transceiver port, configured to transmit and receive a first radio frequency signal in a multiple-input-multiple-output manner; a second signal transceiver port, configured to transmit and receive a second radio frequency signal in a single-input-single-output manner; a signal processing unit, configured to filter and to combine and/or split the first radio frequency signal and the second radio frequency signal, the signal processing unit being respectively connected to the first signal transceiver port and the second signal transceiver port; a synchronization unit, configured to demodulate, analyze and modulate the first radio frequency signal and a TDD (Time Division Duplex) switch signal in the second radio frequency signal, the synchronization unit being respectively connected to the first signal transceiver port, the second signal transceiver port, and the signal processing unit.

A radiation array group includes three columns of radiating elements: a plurality of first radiating elements in a first column, a plurality of second radiating elements in a second column, and a plurality of third radiating elements in a third column. A first radiating element and a third radiating element in a same row are electrically connected. Each radiating element of the plurality of first, second, and third radiating elements belongs to a first element group for forming a first two-port radiation array group or a second element group for forming a second two-port radiation array group. When the first radiating element and the third radiating element in the same row belong to the first element group, a second radiating element between the first radiating element and the third radiating element in the same row belongs to the second element group.

An antenna feed includes a waveguide, a medium support block, and a reflection surface, a smaller end of the medium support block is connected to the waveguide, the reflective surface contacts the inner surface, where the inner surface has at least first, second and third wall segments, where a distance of the second wall segment to the longitudinal axis is greater than a distance of the third wall segment to the longitudinal axis and is smaller than a distance of the first wall segment to the longitudinal axis, where a first angle is defined between the first wall segment and the longitudinal axis, a second angle is defined between the second wall segment and the longitudinal axis, a third angle is defined between the third wall segment and the longitudinal axis, and the second angle is greater than the first angle and greater than the third angle.

A right-angle elbow assembly includes: a first end portion and a second end portion; a connect portion extending between the first end portion and the second end portion; and a ridge portion positioned in the connect portion and above a transition surface of the connect portion.

A calibration method for a radio frequency (RF) link includes generating, by a signal source module, a first signal with a predetermined frequency in a near-end device, adjusting, by a first digital ATT module, the first signal to generate a second signal with a first predetermined power level, and adjusting, by a second digital ATT module of a first optical module in the near-end device, the second signal to cause an input signal or an output signal of the first optical module to have a second predetermined power level, the first optical module being connected to the signal source module via an optical fiber.

A synchronization method for a distributed antenna system is provided. The distributed antenna system includes an access unit and a far-end unit. The method includes obtaining a configuration parameter of time-division duplexing (TDD), obtaining a space signal according to the configuration parameter to determine first frame header information associated with a first TDD network, transmitting the first frame header information to at least one far-end unit, and determining a synchronization signal by the at least one far-end unit according to the first frame header information.

A distributed antenna system includes at least one remote unit and a first access unit. The first access unit includes at least one frequency sub-board, a first synchronization module, and a first signal processing module. At least one frequency sub-board of the at least one frequency sub-board is configured to receive a time-division duplexing (TDD) signal. The first synchronization module is configured to be communicatively connected to the frequency sub-board receiving the TDD signal. The first signal processing module is communicatively connected to the first synchronization module and configured to process the TDD signal received via the at least one frequency sub-board.

An optic fiber detection method of a distributed antenna system includes: at a near-end device, sending a test mode switch command to a plurality of relay devices to command the plurality of relay devices to switch to a test mode; and under the test mode: sending a first optical switch control command, the first optical switch control command being used to instruct the plurality of relay devices that have received the first optical switch control command to switch to a group of first optical channels; acquiring optic fiber connection information between the near-end device and the relay devices under all first optical channels of the group of first optical channels; and determining optic fiber connection status of the distributed antenna system according to the optic fiber connection information between the near-end device and the relay devices under all first optical channels and a working mode of the distributed antenna system.