| 摘要 |
A wireless device receives at least one control message configuring a plurality of cell groups and a pathloss reference for each secondary cell in at least one secondary cell. The wireless device transmits uplink signals to a base station in a first secondary cell in a secondary cell group. Transmission power of the uplink signals is determined employing a received power of the pathloss reference assigned to the first secondary cell. Timing of the uplink signals in the secondary cell group employs a second synchronization signal on an active secondary cell in the secondary cell group as a secondary timing reference.
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