PROSE TECHNOLOGIES (SUZHOU) CO., LTD.

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 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.

A multi-operator carrier tracking method an includes: obtaining a carrier tracking mode of a user terminal, in response to detecting the user terminal being unable to lock onto a currently configured carrier signal, performing a reconfiguration process. The reconfiguration process includes: obtaining information of a next candidate carrier according to the carrier tracking mode, and re-configuring the user terminal from a current carrier to a carrier corresponding to the information of the next candidate carrier. The method also includes: in response to the user terminal being unable to lock onto the configured candidate carrier signal, repeating the reconfiguration process until a lockable candidate carrier is found.

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 method for transmission compatible with two types of TDD switch signals includes: receiving a downlink TDD switch signal; performing a power-on detection on the downlink TDD switch signal; in response to a successful power-on detection, generating a standard switch signal corresponding to the downlink TDD switch signal; receiving an information of a successful power-on detection and the standard switch signal; comparing the downlink TDD switch signal with the standard switch signal; in response to that a number of abnormal values between the downlink TDD switch signal and the standard switch signal is less than a set value N, outputting a first downlink power switching signal, a first uplink power switching signal, a second downlink power switching signal, and a second uplink power switching signal related to the downlink TDD switch signal.

A device for implementing an antenna Ping function includes a primary module and a secondary module. The secondary module includes a secondary controller, a multiplexer, a first On-Off Keying (OOK) modem, a second OOK modem connected to the secondary controller and a corresponding multiplexer, and a plurality of antenna radio frequency (RF) ports. The multiplexer is connected to the plurality of antenna RF ports. The primary module is connected to the secondary controller through the first OOK modem. The primary module receives a Ping command transmitted by a base station, generates a Ping message, and transmits the Ping message to the secondary controller through the first OOK modem. The secondary controller transmits the received Ping message to the second OOK modem. The second OOK modem transmits the Ping message to a corresponding antenna RF port through the multiplexer. The antenna RF port feeds back a signal to the base station.