Random Access Mechanism for a Wireless Device and Base Station
First Claim
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1. A method comprising:
- a) receiving, by a wireless device to communicate employing a plurality of cells, 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 primary cell and at least one secondary cell in said plurality of cells; and
(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, 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
(b) a secondary cell group comprising a second subset of said at least one secondary cell; and
ii) comprising a pathloss reference for each secondary cell in said at least one secondary cell, said pathloss reference being only configurable as a downlink of said secondary cell if said secondary cell is in said secondary cell group; and
b) transmitting, by said wireless device, uplink signals to said base station in a first secondary cell in said secondary cell group, wherein;
i) transmission power of said uplink signals being determined, at least in part, employing a received power of said pathloss reference assigned to said first secondary cell; and
ii) timing of said uplink signals in said secondary cell group employing a second synchronization signal on an activated secondary cell in said secondary cell group as a secondary timing reference.
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Abstract
A wireless device receives at least one control message configuring a plurality of cell groups and a pathloss reference for each secondary cell in at least one secondary cell. The wireless device transmits uplink signals to a base station 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 second synchronization signal on an active secondary cell in the secondary cell group as a secondary timing reference.
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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 to communicate employing a plurality of cells, 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 primary cell and at least one secondary cell in said plurality of cells; and (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, 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 (b) a secondary cell group comprising a second subset of said at least one secondary cell; and ii) comprising a pathloss reference for each secondary cell in said at least one secondary cell, said pathloss reference being only configurable as a downlink of said secondary cell if said secondary cell is in said secondary cell group; and b) transmitting, by said wireless device, uplink signals to said base station in a first secondary cell in said secondary cell group, wherein; i) transmission power of said uplink signals being determined, at least in part, employing a received power of said pathloss reference assigned to said first secondary cell; and ii) timing of said uplink signals in said secondary cell group employing a second synchronization signal on an activated secondary cell in said secondary cell group as a secondary timing reference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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; (1) causing in said wireless device; (a) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and (b) 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;
(i) 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
(ii) a secondary cell group comprising a second subset of said at least one secondary cell; and(2) comprising a pathloss reference for each secondary cell in said at least one secondary cell, said pathloss reference being only configurable as a downlink of said secondary cell if said secondary cell is in said secondary cell group; and ii) transmit uplink signals to said base station in a first secondary cell in said secondary cell group, wherein; (1) transmission power of said uplink signals being determined, at least in part, employing a received power of said pathloss reference assigned to said first secondary cell; and (2) timing of said uplink signals in said secondary cell group employing a second synchronization signal on an activated secondary cell in said secondary cell group as a secondary timing reference. - 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; (1) causing in said wireless device assignment of each of 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 a plurality of cells, said first subset comprising a primary cell; and (b) a secondary cell group comprising a second subset of said at least one secondary cell; and (2) comprising a pathloss reference for each secondary cell in said at least one secondary cell; and ii) transmit uplink signals to said base station in a first secondary cell in said secondary cell group, wherein; (1) transmission power of said uplink signals being determined, at least in part, employing a received power of said pathloss reference assigned to said first secondary cell; and (2) timing of said uplink signals in said secondary cell group employing a second synchronization signal on an activated secondary cell in said secondary cell group as a secondary timing reference. - View Dependent Claims (17, 18, 19, 20)
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Specification