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US 8,559,405 B2Granted
Multicarrier wireless communications reference cell
AssigneeOfinno Technologies, LLC
InventorEsmael Hejazi Dinan
Life of this patent
Estimating the term…
Abstract
A base station configures a primary cell group and at least one secondary cell group in a wireless device. The wireless device transmits first uplink signals in the secondary cell group employing a reference secondary cell in the secondary cell group as a timing reference. The wireless device autonomously selects a new activated secondary cell in the secondary cell group as the timing reference. The new activated secondary cell is different from the reference secondary cell. The wireless device transmits second uplink signals in the secondary cell group employing the new activated secondary cell as the timing reference.
Claims19
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 a plurality of secondary cells;
- ii) configuration of a deactivation timer for each secondary cell in said plurality of secondary cells, said deactivation timer corresponding to a secondary cell restarting in response to a packet transmission on said secondary cell, said corresponding secondary cell deactivated in said wireless device in response to said deactivation timer expiring;
- and
- iii) assignment of each of said plurality of secondary cells 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, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell as a primary timing reference;
- and
- (2) a secondary cell group comprising a second subset of said plurality of secondary cells, said second subset comprising a reference secondary cell;
- b) receiving, by said wireless device, a control command configured to cause transmission of a random access preamble on random access resources of said reference secondary cell in said secondary cell group;
- and
- c) receiving, by said wireless device, a random access response on a primary cell in said primary cell group, said random access response comprising a timing advance command for said secondary cell group;
- d) transmitting first uplink signals in said secondary cell group, by said wireless device, employing a synchronization signal on said reference secondary cell as a secondary timing reference, said reference secondary cell being an activated cell in said secondary cell group;
- e) selecting, autonomously by said wireless device, a new activated secondary cell in said secondary cell group as said secondary timing reference if all of the following conditions are satisfied:
- i) said reference secondary cell is deactivated in said wireless device;
- and
- ii) at least one secondary cell in said secondary cell group is active in said wireless device;
- and
- f) transmitting second uplink signals in said secondary cell group, by said wireless device, employing a second synchronization signal on said new activated secondary cell as said secondary timing reference.
15 more elements
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 a plurality of secondary cells;
- ii) configuration of a deactivation timer for each secondary cell in said plurality of secondary cells, said deactivation timer corresponding to a secondary cell restarting in response to a packet transmission on said secondary cell, said corresponding secondary cell deactivated in said wireless device in response to said deactivation timer expiring;
- and
- iii) assignment of each of said plurality of secondary cells to a cell group in a plurality of cell groups, said plurality of cell groups comprising a secondary cell group comprising a subset of said plurality of secondary cells;
- b) receiving, by said wireless device, a control command configured to cause transmission of a random access preamble on random access resources of a reference secondary cell in said secondary cell group;
- and
- c) receiving, by said wireless device, a random access response on a primary cell in said primary cell group, said random access response comprising a timing advance command for said secondary cell group;
- d) transmitting first uplink signals in said secondary cell group, by said wireless device, employing a synchronization signal on said reference secondary cell in said secondary cell group as a timing reference, said reference secondary cell being an activated cell in said secondary cell group;
- e) selecting, autonomously by said wireless device, a new activated secondary cell in said secondary cell group as said timing reference if all of the following conditions are satisfied:
- i) said reference secondary cell is deactivated in said wireless device;
- and
- ii) at least one secondary cell in said secondary cell group is active in said wireless device;
- and
- f) transmitting second uplink signals in said secondary cell group, by said wireless device, employing a third synchronization signal on said new activated secondary cell as said timing reference.
12 more elements
A wireless device comprising:
- 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 a plurality of secondary cells;
- and
- (2) assignment of each of said plurality of secondary cells 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 plurality of secondary cells;
- ii) receive a control command configured to cause transmission of a random access preamble on random access resources of a reference secondary cell in said secondary cell group;
- and
- iii) receive a random access response on a primary cell in said primary cell group, said random access response comprising a timing advance command for said secondary cell group;
- iv) transmit first uplink signals in said secondary cell group employing a synchronization signal on said reference secondary cell in said secondary cell group as a secondary timing reference, said reference secondary cell being an activated cell in said secondary cell group;
- v) select, autonomously and without said wireless device informing said base station, a new activated secondary cell in said secondary cell group as said secondary timing reference, said new activated secondary cell being different from said reference secondary cell;
- and
- vi) transmit second uplink signals in said secondary cell group, by said wireless device, employing a third synchronization signal on said new activated secondary cell as said secondary timing reference.
15 more elements
Dependencies are inferred from the claim text.