| 摘要 |
A wireless device receives message(s) configuring cell groups and transmissions of sounding reference signals. n sounding reference signals are configured to be transmitted in a subframe (n>1). The wireless device transmits at least one packet on at least one first cell in symbols of the subframe. The symbols comprise the last symbol of the subframe. The wireless device transmits a k subset of the n sounding reference signals in the last symbol (1<=k<n). The wireless device drops an m subset of the n sounding reference signals in the last symbol (1<=m<n).
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