Radio access for a wireless device and base station
First Claim
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1. A method comprising:
- a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device;
i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell;
ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising;
(1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and
(2) a secondary cell group comprising a second subset of said at least one secondary cell; and
iii) configuration of a time alignment timer for each of said plurality of cell groups, said time alignment timer starting or restarting in response to said wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group in said plurality of cell groups, said commanded cell group considered;
(1) out-of-sync in response to said time alignment timer being expired or not running; and
(2) in-sync in response to said time alignment timer running;
b) initiating, by said wireless device while said primary cell group is in-sync, a random access process for a secondary cell in said secondary cell group in response to receiving a control command;
c) transmitting, by said wireless device, a first random access preamble on random access resources of said secondary cell; and
d) aborting, by said wireless device, said random access process on said secondary cell if said primary cell group becomes out-of-sync.
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Abstract
A wireless device receives control message(s) configuring a plurality of cell groups and a time alignment timer for each of the plurality of cell groups. The time alignment timer starts or restarts in response to the wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group. The wireless device receives a control command initiating a random access process for a secondary cell in the secondary cell group. The wireless device aborts the random access process on the secondary cell if a first time alignment timer of the primary cell group expires.
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Citations
20 Claims
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1. A method comprising:
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a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device; i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising; (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and (2) a secondary cell group comprising a second subset of said at least one secondary cell; and iii) configuration of a time alignment timer for each of said plurality of cell groups, said time alignment timer starting or restarting in response to said wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group in said plurality of cell groups, said commanded cell group considered; (1) out-of-sync in response to said time alignment timer being expired or not running; and (2) in-sync in response to said time alignment timer running; b) initiating, by said wireless device while said primary cell group is in-sync, a random access process for a secondary cell in said secondary cell group in response to receiving a control command; c) transmitting, by said wireless device, a first random access preamble on random access resources of said secondary cell; and d) aborting, by said wireless device, said random access process on said secondary cell if said primary cell group becomes out-of-sync. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device; i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising; (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and (2) a secondary cell group comprising a second subset of said at least one secondary cell; and iii) configuration of a time alignment timer for each of said plurality of cell groups, said time alignment timer starting or restarting in response to said wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group in said plurality of cell groups; b) receiving, by said wireless device while a first time alignment timer of said primary cell group is running, a control command initiating a random access process for a secondary cell in said secondary cell group in said wireless device; and c) aborting, by said wireless device, said random access process on said secondary cell if said first time alignment timer of said primary cell group expires. - View Dependent Claims (12, 13, 14, 15)
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16. A wireless device comprising:
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a) one or more communication interfaces; b) one or more processors; and c) memory storing instructions that, when executed, cause said wireless device to; i) receive at least one control message from a base station, said at least one control message causing in said wireless device; (1) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; (2) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising; (a) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and (b) a secondary cell group comprising a second subset of said at least one secondary cell; and (3) configuration of a time alignment timer for each of said plurality of cell groups, said time alignment timer starting or restarting in response to said wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group in said plurality of cell groups; ii) receive, while a first time alignment timer of said primary cell group is running, a control command initiating a random access process for a secondary cell in said secondary cell group in said wireless device; and iii) abort said random access process on said secondary cell if said first time alignment timer of said primary cell group expires. - View Dependent Claims (17, 18, 19, 20)
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Specification