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    • 2. 发明公开
    • TIME-DIVISION DUPLEXING (TDD) IN DISTRIBUTED COMMUNICATIONS SYSTEMS, INCLUDING DISTRIBUTED ANTENNA SYSTEMS (DASS)
    • ZEITDUPLEXIERUNG(TDD)在VERTEILTEN KOMMUNIKATIONSSYSTEMEN,EINSCHLIESSLICH VERTEILTEN ANTENNENSYSTEMEN(DASS)
    • EP3008828A1
    • 2016-04-20
    • EP14734910.4
    • 2014-06-11
    • Corning Optical Communications Wireless Ltd.
    • BEN-SHLOMO, DrorSHAPIRA, Isaac
    • H04B1/48H04B17/00
    • H04W72/0446H04B1/48H04B17/318H04L5/14H04W72/0406
    • Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs) is disclosed. In one embodiment, a control circuit is provided and configured to control the TDD transmit mode of a DAS to control the allocation of time slots for uplink and downlink communications signal distribution in respective uplink path(s) and downlink path(s). The control circuit includes separate power detectors configured to detect either a transmit power level in a downlink path or a receive power level in an uplink path. If the transmit power detected in the downlink path is greater than receive power detected in the uplink path, the control circuit switches the TDD transmit mode to the downlink direction. In this manner, the control circuit does not have to control the TDD transmit mode based solely on detected power in the downlink path, where a directional coupler may leak uplink power in the downlink path.
    • 公开了分布式通信系统中的时分双工(TDD),包括分布式天线系统(DAS)。 在一个实施例中,提供控制电路并配置为控制DAS的TDD发射模式,以控制在各个上行链路路径和下行链路路径中的上行链路和下行链路通信信号分配的时隙分配。 控制电路包括被配置为检测下行链路路径中的发射功率电平或上行链路路径中的接收功率电平的分离的功率检测器。 如果在下行路径中检测到的发送功率大于在上行链路路径中检测到的接收功率,则控制电路将TDD发送模式切换到下行链路方向。 以这种方式,控制电路不必仅仅基于下行链路路径中的检测功率来控制TDD传输模式,其中定向耦合器可能泄漏下行链路路径中的上行链路功率。
    • 3. 发明授权
    • TIME-DIVISION DUPLEXING (TDD) IN DISTRIBUTED COMMUNICATIONS SYSTEMS, INCLUDING DISTRIBUTED ANTENNA SYSTEMS (DASS)
    • 分布式通信系统中的时分双工(TDD),包括分布式天线系统(DASS)
    • EP3008828B1
    • 2017-08-09
    • EP14734910.4
    • 2014-06-11
    • Corning Optical Communications Wireless Ltd.
    • BEN-SHLOMO, DrorSHAPIRA, Isaac
    • H04B1/48H04B17/00
    • H04W72/0446H04B1/48H04B17/318H04L5/14H04W72/0406
    • Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs) is disclosed. In one embodiment, a control circuit is provided and configured to control the TDD transmit mode of a DAS to control the allocation of time slots for uplink and downlink communications signal distribution in respective uplink path(s) and downlink path(s). The control circuit includes separate power detectors configured to detect either a transmit power level in a downlink path or a receive power level in an uplink path. If the transmit power detected in the downlink path is greater than receive power detected in the uplink path, the control circuit switches the TDD transmit mode to the downlink direction. In this manner, the control circuit does not have to control the TDD transmit mode based solely on detected power in the downlink path, where a directional coupler may leak uplink power in the downlink path.
    • 披露了分布式通信系统(包括分布式天线系统(DAS))中的时分双工(TDD)。 在一个实施例中,控制电路被提供并被配置为控制DAS的TDD发射模式,以控制用于上行链路路径和下行链路路径中的上行链路和下行链路通信信号分布的时隙分配。 控制电路包括分离的功率检测器,其被配置为检测下行链路路径中的发射功率电平或上行链路路径中的接收功率电平。 如果在下行链路路径中检测到的发射功率大于在上行链路路径中检测到的接收功率,则控制电路将TDD发射模式切换到下行链路方向。 以此方式,控制电路不必仅基于在下行链路路径中检测到的功率来控制TDD发射模式,其中定向耦合器可能泄漏下行链路路径中的上行链路功率。