Random access preamble transmission
First Claim
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1. A method comprising:
- a) receiving, by a wireless device in a plurality of wireless devices, at least one control message from a base station, said at least one control message;
i) 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, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell; and
(b) a secondary cell group comprising a second subset of said plurality of secondary cells, said second subset comprising a reference secondary cell, uplink transmissions in said secondary cell group employing a second synchronization signal on said reference secondary cell as a secondary timing reference; and
ii) comprising a plurality of common parameters having the same value for wireless devices in said plurality of wireless devices, said plurality of common parameters comprising the following parameters for each of at least one first secondary cell in said plurality of secondary cells;
(1) a plurality of random access resource parameters; and
(2) a plurality of power control parameters for random access preamble transmission; and
b) receiving, by said wireless device, a control command to from said base station, said control command being;
i) configurable to cause transmission of a first random access preamble on a secondary cell in said secondary cell group, said secondary cell being one of said at least one first secondary cell; and
ii) unconfigurable to cause transmission of a second random access preamble on any secondary cell in said primary cell group; and
wherein one or more second secondary cells in said primary cell group are not configured with usable random access resources for said wireless device.
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Abstract
A base station transmits control message(s) to assign each of secondary cells to a cell group in a plurality of cell groups comprising a primary cell group and a secondary cell group. The base the base station transmits a control command to the wireless device. The control command is configurable to cause transmission of a first random access preamble on a secondary cell in the secondary cell group. The control command is unconfigurable to cause transmission of a second random access preamble on any secondary cell in the primary cell group.
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Citations
17 Claims
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1. A method comprising:
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a) receiving, by a wireless device in a plurality of wireless devices, at least one control message from a base station, said at least one control message; i) 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, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell; and (b) a secondary cell group comprising a second subset of said plurality of secondary cells, said second subset comprising a reference secondary cell, uplink transmissions in said secondary cell group employing a second synchronization signal on said reference secondary cell as a secondary timing reference; and ii) comprising a plurality of common parameters having the same value for wireless devices in said plurality of wireless devices, said plurality of common parameters comprising the following parameters for each of at least one first secondary cell in said plurality of secondary cells; (1) a plurality of random access resource parameters; and (2) a plurality of power control parameters for random access preamble transmission; and b) receiving, by said wireless device, a control command to from said base station, said control command being; i) configurable to cause transmission of a first random access preamble on a secondary cell in said secondary cell group, said secondary cell being one of said at least one first secondary cell; and ii) unconfigurable to cause transmission of a second random access preamble on any secondary cell in said primary cell group; and wherein one or more second secondary cells in said primary cell group are not configured with usable random access resources for said wireless device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A base station, configured to communicate employing a plurality of cells, comprising:
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c) one or more communication interfaces; d) one or more processors; and e) memory storing instructions that, when executed, cause said base station to; i) transmit at least one control message to a wireless device, said at least one control message; (1) configured to cause in said wireless device; (a) configuration of a primary cell and a plurality of secondary cells in said plurality of cells; and (b) 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;
(i) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising a primary cell; and
(ii) a secondary cell group comprising a second subset of said plurality of secondary cells; and(2) comprising a plurality of common parameters, said plurality of common parameters comprising the following parameters for each of at least one first secondary cell in said plurality of secondary cells; (a) a plurality of random access resource parameters; and (b) a plurality of power control parameters for random access preamble transmission; and ii) transmit a control command to said wireless device, said control command being; (1) configurable to cause transmission of a first random access preamble on a secondary cell in said secondary cell group; and (2) unconfigurable to cause transmission of a second random access preamble on any secondary cell in said primary cell group; and wherein one or more second secondary cells in said primary cell group are not configured with usable random access resources for said wireless device. - View Dependent Claims (11, 12, 13)
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14. 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 base station configured to communicate employing a plurality of cells with said wireless device, said at least one control message; (1) causing in said wireless device; (a) configuration of a primary cell and a plurality of secondary cells in said plurality of cells; and (b) 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;
(i) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising a primary cell; and
(ii) a secondary cell group comprising a second subset of said plurality of secondary cells; and(2) comprising a plurality of common parameters, said plurality of common parameters comprising the following parameters for each of at least one first secondary cell in said plurality of secondary cells; (a) a plurality of random access resource parameters; and (b) a plurality of power control parameters for random access preamble transmission; and iii) receive a control command from said base station, said control command; (1) configurable to cause transmission of a first random access preamble on a secondary cell in said secondary cell group, said secondary cell being one of said at least one first secondary cell; and (2) unconfigurable to cause transmission of a second random access preamble on any secondary cell in said primary cell group; and wherein one or more second secondary cells in said primary cell group are not configured with usable random access resources for said wireless device. - View Dependent Claims (15, 16, 17)
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Specification