Sounding in multicarrier wireless communications

摘要

A wireless device transmits one of the sounding reference signals (SRSs) on a first cell in a first cell group in parallel with transmission a first random access preamble. The wireless device drops transmission of a first SRS if the first SRS transmission and a second random access preamble transmission coincide in the same subframe and the wireless device has insufficient power to transmit the first SRS in parallel with the second random access preamble.

主权项

1. A wireless device comprising:
a) one or more communication interfaces; b) one or more processors; and c) memory storing instructions that, when executed, cause said wireless device to:
i) receive at least one control message comprising configuration parameters of:
(1) a plurality of cells comprising a primary cell and at least one secondary cell, said plurality of cells being grouped into a plurality of cell groups; and(2) sounding reference signals (SRSs); andii) transmit one of said SRSs on a first cell in a first cell group in said plurality of cell groups overlapping in the same first subframe with transmission of a first random access preamble, said wireless device having sufficient transmission power to transmit said one of said SRSs and said first random access preamble; andwherein transmission of a first SRS in said SRSs is dropped if:(1) said first SRS transmission and a second random access preamble transmission coincide in the same second subframe; and(2) said wireless device has insufficient transmission power to transmit said first SRS in parallel with said second random access preamble.