Sounding reference signal transmission in a wireless network
First Claim
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1. A wireless device comprising:
- one or more processors; and
memory storing instructions that, when executed, cause the wireless device to;
receive at least one message comprising;
a cell group index of a secondary cell of a secondary cell group in a plurality of cell groups; and
configuration parameters of sounding reference signals (SRSs) transmission on the secondary cell;
receive a control command to cause transmission of a random access preamble in the secondary cell group;
receive a random access response comprising a timing advance command for the secondary cell group and a power control command; and
transmit one or more of the SRSs on the secondary cell after applying the timing advance command, wherein transmission power of a first one of the one or more SRSs depends, at least in part, on the power control command, and wherein the wireless device is configured to not transmit any of the SRSs on the secondary cell during a period between receiving the at least one message and receiving the timing advance command.
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Abstract
A wireless device receives message(s) comprising configuration parameters of sounding reference signals on a secondary cell in a secondary cell group. The wireless device transmits one or more of the sounding reference signals on the secondary cell after applying a timing advance to the secondary cell group. The wireless device is configured to not transmit any of the sounding reference signals on the secondary cell after receiving the message(s) and before receiving the timing advance.
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Citations
18 Claims
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1. A wireless device comprising:
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one or more processors; and memory storing instructions that, when executed, cause the wireless device to; receive at least one message comprising; a cell group index of a secondary cell of a secondary cell group in a plurality of cell groups; and configuration parameters of sounding reference signals (SRSs) transmission on the secondary cell; receive a control command to cause transmission of a random access preamble in the secondary cell group; receive a random access response comprising a timing advance command for the secondary cell group and a power control command; and transmit one or more of the SRSs on the secondary cell after applying the timing advance command, wherein transmission power of a first one of the one or more SRSs depends, at least in part, on the power control command, and wherein the wireless device is configured to not transmit any of the SRSs on the secondary cell during a period between receiving the at least one message and receiving the timing advance command. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
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receiving, by a wireless device, at least one message comprising; a cell group index of a secondary cell of a secondary cell group in a plurality of cell groups; and configuration parameters of sounding reference signals (SRSs) transmission on the secondary cell; receiving a control command to cause transmission of a random access preamble in the secondary cell group; receiving a random access response comprising a timing advance command for the secondary cell group and a power control command; and transmitting one or more of the SRSs on the secondary cell after applying the timing advance command, wherein transmission power of a first one of the one or more SRSs depends, at least in part, on the power control command, and wherein the wireless device is configured to not transmit any of the SRSs on the secondary cell during a period between receiving the at least one message and receiving the timing advance command. - View Dependent Claims (8, 9, 10, 11)
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12. A base station comprising:
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one or more processors; and memory storing instructions that, when executed, cause the base station to; transmit at least one message comprising; a cell group index of a secondary cell of a secondary cell group in a plurality of cell groups; and configuration parameters of sounding reference signals (SRSs) transmission on the secondary cell; transmit a control command to cause transmission of a random access preamble in the secondary cell group; transmit a random access response comprising a timing advance command for the secondary cell group and a power control command; and receive one or more of the SRSs on the secondary cell after the timing advance command is applied, wherein transmission power of a first one of the one or more SRSs depends, at least in part, on the power control command, and wherein the base station does not receive any of the SRSs on the secondary cell during a period after transmitting the at least one message and before transmitting the timing advance command. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification