23-07-2020 дата публикации
Номер: US20200236714A1
Принадлежит:
Methods, apparatuses, and systems for wireless communications are described. A wireless device may receive a message comprising: a timing advance command (TAC) for a secondary cell group, and a power control command. The wireless device may transmit one or more sounding reference signals via a secondary cell of the secondary cell group, in response to applying the TAC. The wireless device may use a transmission power that may be based on the power control command. 1. A wireless device comprising:one or more processors; and receive configuration information associated with sounding reference signal (SRS) transmission via a secondary cell of a secondary cell group;', 'receive an activation command to activate the secondary cell;', 'after receiving the activation command, transmit a random access preamble via the secondary cell group;', a timing advance command (TAC) for the secondary cell group; and', 'a power control command; and, 'receive a random access response comprising, 'after applying the TAC, transmit a plurality of SRSs via the secondary cell based on the configuration information, wherein transmission power associated with transmission of a first SRS, of the plurality of the SRSs, is based on the power control command., 'memory storing instructions that, when executed by the one or more processors, cause the wireless device to2. The wireless device of claim 1 , wherein the instructions claim 1 , when executed by the one or more processors claim 1 , further cause the wireless device to receive claim 1 , before transmitting the random access preamble claim 1 , a second control command.3. The wireless device of claim 1 , wherein the instructions claim 1 , when executed by the one or more processors claim 1 , further cause the wireless device to drop at least one SRS claim 1 , of the plurality of SRSs claim 1 , based on one or more conditions.4. The wireless device of claim 1 , wherein the wireless device is configured to not transmit any of the plurality of ...
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