Wireless device preamble transmission timing
First Claim
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1. A method comprising:
- receiving, by a wireless device, at least one control message comprising;
configuration parameters of a plurality of cells comprising a first cell group and a second cell group; and
a parameter of a time alignment timer associated with the second cell group, wherein the time alignment timer starts or restarts based on one or more timing advance commands (TACs);
generating a first updated timing advance value (TAV) by updating a first TAV of the second cell group based on at least one first TAC for the second cell group;
restarting the time alignment timer;
storing the first updated TAV;
receiving a control command for a transmission of a random access preamble; and
transmitting, by the wireless device, via random access resources of a cell of the second cell group, and based on the control command, the random access preamble, wherein transmission timing of the random access preamble is based on the stored first updated TAV.
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Abstract
Methods and apparatuses are described for wireless communications. Cells may be grouped into a plurality of cell groups. A wireless device may receive a control command and transmit a random access preamble via a secondary cell.
374 Citations
40 Claims
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1. A method comprising:
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receiving, by a wireless device, at least one control message comprising; configuration parameters of a plurality of cells comprising a first cell group and a second cell group; and a parameter of a time alignment timer associated with the second cell group, wherein the time alignment timer starts or restarts based on one or more timing advance commands (TACs); generating a first updated timing advance value (TAV) by updating a first TAV of the second cell group based on at least one first TAC for the second cell group; restarting the time alignment timer; storing the first updated TAV; receiving a control command for a transmission of a random access preamble; and transmitting, by the wireless device, via random access resources of a cell of the second cell group, and based on the control command, the random access preamble, wherein transmission timing of the random access preamble is based on the stored first updated TAV. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless device comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to; receive at least one control message comprising; configuration parameters of a plurality of cells comprising a first cell group and a second cell group; and a parameter of a time alignment timer associated with the second cell group, wherein the time alignment timer starts or restarts based on one or more timing advance commands (TACs); generate a first updated timing advance value (TAV) by an update of a first TAV of the second cell group based on at least one first TAC for the second cell group; restart the time alignment timer; store the first updated TAV; receive a control command for a transmission of a random access preamble; and transmit, via random access resources of a cell of the second cell group, and based on the control command, the random access preamble, wherein transmission timing of the random access preamble is based on the stored first updated TAV. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system comprising:
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a base station comprising; one or more processors; and memory storing instructions that, when executed by the one or more processors of the base station, cause the base station to; transmit at least one control message comprising; configuration parameters of a plurality of cells comprising a first cell group and a second cell group; and a parameter of a time alignment timer associated with the second cell group, wherein the time alignment timer starts or restarts based on one or more timing advance commands (TACs); and transmit a control command for a transmission of a random access preamble; and a wireless device, wherein the wireless device comprises; one or more processors; and memory storing instructions that, when executed by the one or more processors of the wireless device, cause the wireless device to; generate a first updated timing advance value (TAV) by an update of a first TAV of the second cell group based on at least one first TAC for the second cell group; restart the time alignment timer; store the first updated TAV; and transmit, via random access resources of a cell of the second cell group and based on the control command, the random access preamble, wherein the transmission timing of the random access preamble is based on the stored first updated TAV. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method comprising:
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transmitting, by a base station and to a wireless device, at least one control message comprising; configuration parameters of a plurality of cells comprising a first cell group and a second cell group; and a parameter of a time alignment timer associated with the second cell group, wherein the time alignment timer starts or restarts based on one or more timing advance commands (TACs); generating a first updated timing advance value (TAV) by updating a first TAV of the second cell group based on at least one first TAC for the second cell group; restarting the time alignment timer; storing the first updated TAV; transmitting, by the base station, a control command for a transmission of a random access preamble; and transmitting, by the wireless device, via random access resources of a cell of the second cell group, and based on the control command, the random access preamble, wherein the transmission timing of the random access preamble is based on the stored first updated TAV. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification