Random access mechanism for a wireless device and base station
First Claim
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1. A wireless device comprising:
- 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 message comprising;
configuration parameters of a plurality of cells comprising a primary cell group and a secondary cell group; and
a pathloss reference configuration for each of one or more secondary cells of the plurality of cells;
transmit first uplink signals via the secondary cell group, wherein transmission timing of the first uplink signals is based on timing that is associated with a first cell and that is used for preamble transmission;
select a second cell as a timing reference cell for the secondary cell group in response to the first cell meeting a first criterion; and
transmit second uplink signals via the secondary cell group, wherein;
transmission power of the second uplink signals is based on the pathloss reference configuration; and
timing of the second uplink signals is based on the timing reference cell.
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Abstract
A wireless device receives control message(s) comprising parameters of a plurality of cell groups and a pathloss reference for each secondary cell. The wireless device transmits uplink signals in a first secondary cell in a secondary cell group. Transmission power of the uplink signals is determined employing a received power of the pathloss reference assigned to the first secondary cell. Timing of the uplink signals in the secondary cell group employs a synchronization signal on an active secondary cell in the secondary cell group as a timing reference.
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Citations
48 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 by the one or more processors, cause the wireless device to; receive at least one message comprising; configuration parameters of a plurality of cells comprising a primary cell group and a secondary cell group; and a pathloss reference configuration for each of one or more secondary cells of the plurality of cells; transmit first uplink signals via the secondary cell group, wherein transmission timing of the first uplink signals is based on timing that is associated with a first cell and that is used for preamble transmission; select a second cell as a timing reference cell for the secondary cell group in response to the first cell meeting a first criterion; and transmit second uplink signals via the secondary cell group, wherein; transmission power of the second uplink signals is based on the pathloss reference configuration; and timing of the second uplink signals is based on the timing reference cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24)
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12. A method comprising:
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receiving, by a wireless device, at least one message comprising; configuration parameters of a plurality of cells comprising a primary cell group and a secondary cell group; and a pathloss reference configuration for each of one or more secondary cells in of the plurality of cells; transmitting first uplink signals via the secondary cell group, wherein transmission timing of the first uplink signals is based on timing that is associated with a first cell and that is used for preamble transmission; selecting a second cell as a timing reference cell for the secondary cell group in response to the first cell meeting a first criterion; and transmitting second uplink signals via the secondary cell group, wherein; transmission power of the second uplink signals is based on the pathloss reference configuration; and timing of the second uplink signals is based on the timing reference cell. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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25. 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 message comprising; configuration parameters of a plurality of cells comprising a primary cell group and a secondary cell group; and a pathloss reference configuration for each of one or more secondary cells of the plurality of cells; and a wireless device comprising; 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; transmit first uplink signals via the secondary cell group, wherein transmission timing of the first uplink signals is based on timing that is associated with a first cell and that is used for preamble transmission; select a second cell as a timing reference cell for the secondary cell group in response to the first cell meeting a first criterion; and transmit second uplink signals via the secondary cell group, wherein; transmission power of the second uplink signals is based on the pathloss reference configuration; and timing of the second uplink signals is based on the timing reference cell. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method comprising
transmitting, by a base station and to a wireless device, at least one message comprising: -
configuration parameters of a plurality of cells comprising a primary cell group and a secondary cell group; and a pathloss reference configuration for each of one or more secondary cells of the plurality of cells; transmitting, by the wireless device and to the base station, first uplink signals via the secondary cell group, wherein transmission timing of the first uplink signals is based on timing that is associated with a first cell and that is used for preamble transmission; selecting, by the wireless device, a second cell as a timing reference cell for the secondary cell group in response to the first cell meeting a first criterion; and transmitting, by the wireless device and to the base station, second uplink signals via the secondary cell group, wherein; transmission power of the second uplink signals is based on the pathloss reference configuration; and timing of the second uplink signals is based on the timing reference cell. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification