A method for reducing power consumption of a terminal that communicates with a base station in a mobile communication system using a multi-carrier structure composed of a primary component carrier and at least one secondary component carrier comprises: receiving a discontinuous reception (DRX) parameter group for multi carriers from the base station; and setting the multi carriers to the same parameter value, by using the received parameter group. The method for reducing power consumption of the terminal further comprises: performing a downlink control channel receive operation on each carrier according to a DRX cycle. As the base station in the mobile communication system using the multi-carrier structure simplifies the DRX process for reducing power consumption of a terminal by reducing signaling load for the multi-carrier control of the terminal, it becomes possible to reduce power consumption of the terminal.

A method and device for indicating a transmission direction are provided. The method includes: determining a detection mode for detecting a transmission direction of each of the at least one bandwidth part; detecting transmission direction indication information about a bandwidth part according to the detection mode; and determining the transmission direction of the bandwidth part according to the detected transmission direction indication information. In the present disclosure, a terminal can accurately know a transmission direction of each bandwidth part, thereby reducing the detection cost of the terminal.

A method and device for indicating a transmission direction are provided. The method includes: determining a detection mode for detecting a transmission direction of each of the at least one bandwidth part; detecting transmission direction indication information about a bandwidth part according to the detection mode; and determining the transmission direction of the bandwidth part according to the detected transmission direction indication information. In the present disclosure, a terminal can accurately know a transmission direction of each bandwidth part, thereby reducing the detection cost of the terminal.

A cable modem comprises transceiver circuitry and echo cancellation training circuitry. The transceiver circuitry may be operable to transmit and receive signals on a full-duplex Data Over Cable System Interface Specification (DOCSIS) network. The echo cancellation training circuitry may be operable to: determine an echo cancellation training group to which the electronic communication device belongs; determine one or more training periods during which the echo cancellation training group is permitted to transmit training signals; and transmit an echo cancellation training signal during the determined training one or more periods and use the transmitted training signal to train echo cancellation circuitry of the cable modem.

A cable modem comprises transceiver circuitry and echo cancellation training circuitry. The transceiver circuitry may be operable to transmit and receive signals on a full-duplex Data Over Cable System Interface Specification (DOCSIS) network. The echo cancellation training circuitry may be operable to: determine an echo cancellation training group to which the electronic communication device belongs; determine one or more training periods during which the echo cancellation training group is permitted to transmit training signals; and transmit an echo cancellation training signal during the determined training one or more periods and use the transmitted training signal to train echo cancellation circuitry of the cable modem.

A transmission direction determining method and apparatus, a terminal, and a network side device, which belong to the field of communication technologies. According to embodiments of this application, the transmission direction determining method includes: The terminal determines a transmission direction corresponding to a time unit based on first indication signaling. The transmission direction includes an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction. The flexible transmission direction is capable of being indicated as at least one of the following: an uplink transmission direction; a downlink transmission direction; and a flexible direction not for receiving and sending.

A transmission direction determining method and apparatus, a terminal, and a network side device, which belong to the field of communication technologies. According to embodiments of this application, the transmission direction determining method includes: The terminal determines a transmission direction corresponding to a time unit based on first indication signaling. The transmission direction includes an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction. The flexible transmission direction is capable of being indicated as at least one of the following: an uplink transmission direction; a downlink transmission direction; and a flexible direction not for receiving and sending.

Embodiments of the disclosure relate to downlink (DL) and uplink (UL) communication path switching in a time-division duplex (TDD) distributed antenna system (DAS). In this regard, a communications control circuit is provided. The communications control circuit is configured to synchronize to DL periods and UL periods of TDD communication signal to switch a TDD communication signal between a DL communication path and a UL communication path in a DAS accordingly. The communication control circuit is configured to detect the DL periods and/or the UL periods in the TDD communication signal by sensing a power increase associated with the TDD communication signal in the DL communication path. In this manner, the TDD communication signals can be synchronously directed to the DL communication path and UL communication path without destructing and/or decoding the TDD communication signals.

Presented are systems and methods for public channels and signals. A wireless communication node may determine a configuration for a resource configuration set scheduled in a cross-division duplex (XDD) slot, the configuration indicating that any one or more resource units of the resource configuration set that may overlap with a frequency band in the XDD slot that is of a different transmission direction as the resource configuration set, are to be remapped in a defined manner. The wireless communication node may send the configuration to a wireless communication device.

Presented are systems and methods for public channels and signals. A wireless communication node may determine a configuration for a resource configuration set scheduled in a cross-division duplex (XDD) slot, the configuration indicating that any one or more resource units of the resource configuration set that may overlap with a frequency band in the XDD slot that is of a different transmission direction as the resource configuration set, are to be remapped in a defined manner. The wireless communication node may send the configuration to a wireless communication device.