Multicarrier communications employing time alignment timers
First Claim
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1. A method comprising:
- receiving, by a wireless device, at least one control message comprising;
configuration parameters associated with a plurality of cells comprising a primary cell group and a secondary cell group;
a first parameter for a first time alignment timer (TAT) associated with the primary cell group; and
a second parameter for a second TAT associated with the secondary cell group; and
based on the second TAT expiring and the first TAT running, performing the following for an activated cell of the secondary cell group;
clearing at least one Hybrid Automatic Repeat Request (HARQ) buffer;
stopping transmissions of uplink transport blocks;
continuing transmissions of HARQ positive acknowledgements and HARQ negative acknowledgements; and
continuing transmissions of channel state information.
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Abstract
Methods and apparatuses are described for wireless communications. Cells may be grouped into a plurality of cell groups. Time alignment timers may be associated with cell groups. A wireless device may perform/continue/stop transmissions based on the time alignment timers.
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Citations
48 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 associated with a plurality of cells comprising a primary cell group and a secondary cell group; a first parameter for a first time alignment timer (TAT) associated with the primary cell group; and a second parameter for a second TAT associated with the secondary cell group; and based on the second TAT expiring and the first TAT running, performing the following for an activated cell of the secondary cell group; clearing at least one Hybrid Automatic Repeat Request (HARQ) buffer; stopping transmissions of uplink transport blocks; continuing transmissions of HARQ positive acknowledgements and HARQ negative acknowledgements; and continuing transmissions of channel state information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. 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 associated with a plurality of cells comprising a primary cell group and a secondary cell group; a first parameter for a first time alignment timer (TAT) associated with the primary cell group; and a second parameter for a second TAT associated with the secondary cell group; and based on the second TAT expiring and the first TAT running, perform the following for an activated cell of the secondary cell group; clear at least one Hybrid Automatic Repeat Request (HARQ) buffer; stop transmissions of uplink transport blocks; continue transmissions of HARQ positive acknowledgements and HARQ negative acknowledgements; and continue transmissions of channel state information. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A system comprising:
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a base station comprising; first one or more processors; and first memory storing first instructions that, when executed by the first one or more processors, cause the base station to; transmit at least one control message comprising; configuration parameters associated with a plurality of cells comprising a primary cell group and a secondary cell group; a first parameter for a first time alignment timer (TAT) associated with the primary cell group; and a second parameter for a second TAT associated with the secondary cell group; and a wireless device comprising; second one or more processors; and second memory storing second instructions that, when executed by the second one or more processors, cause the wireless device to; based on the second TAT expiring and the first TAT running, perform the following for an activated cell of the secondary cell group; clear at least one Hybrid Automatic Repeat Request (HARQ) buffer; stop transmissions of uplink transport blocks; continue transmissions of HARQ positive acknowledgements and HARQ negative acknowledgements; and continue transmissions of channel state information. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification