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Adaptive voltage modification (AVM) controller for mitigating power interruptions at radio frequency (RF) antennas

專利號
US10868471B2
公開日期
2020-12-15
申請人
T-Mobile USA, Inc.(US WA Bellevue)
發(fā)明人
Steve Fischer
IPC分類
H02M3/335; H01Q1/00; G01R27/02; G05F1/62
技術(shù)領(lǐng)域
avm,rru,voltage,power,controller,may,dc,antennas,boost,metadata
地域: WA WA Bellevue

摘要

This disclosure describes techniques to identify and mitigate an effect of a power interruption that impacts the operation of Radio Frequency (RF) antennas associated with a telecommunications network. More specifically, an Adaptive Voltage Modification (AVM) controller is described that is configured to monitor and detect a change in voltage that occurs during a power transmission from a Direct Current (DC) power source to a Remote Radio Unit (RRU). A power interruption may include a power disruption or a power surge. The AVM controller may be configured to cause a potential transformer that is coupled between the DC power source and the RRU to incrementally step-up or step-down the voltage of a power transmission from the DC power source. In this way, the AVM controller may preemptively mitigate an impact of a power interruption on Quality of Service (QoS) parameters associated with signal data transmitted by the RF antennas.

說明書

The baseband unit 110 may be configured to process the demodulated signals received from the RRU 104 into a format suitable for transmission over a backhaul communication system of a telecommunications network. The baseband unit 110 may also process signals received from the backhaul communication system and supplies the processed signals to the RRU 104 for modulation into RF signals.

In one example, the RRU 104 may be located at the top of the tower 108 to reduce the signal loss between the RRU 104 and the one or more RF antennas 106. For example, if the RRU 104 were located at the bottom of the tower 108, a cable 112 must extend up the tower to the one or more RF antennas 106, a distance of 100 to 200 feet or more, causing appreciable signal loss in transmission signals at cellular frequencies (e.g. 1.8 GHz 3.0 GHz, etc.) over the cable 112. The signal loss may be somewhat mitigated by locating the RRU 104 at the top of the tower 108 near the one or more RF antennas 106, which reduces the required length of the cable 112.

In some examples, the baseband unit 110 may be located at the bottom of the tower 108. Note that signal loss in the cabling connection between the baseband unit 110 at the bottom of the tower 108 and the RRU 104 at the top of the tower 108 may be much smaller, as compared to the signal loss associated with locating the RRU 104 at the bottom of the tower 108, because these signals between the baseband unit 110 and the RRU 104 are transmitted at baseband frequencies as opposed to RF frequencies.

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