Cell timing in a wireless device and base station
First Claim
Patent Images
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 to cause in said wireless device;
i) configuration of a primary cell and at least one secondary cell in said plurality of cells; and
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, 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 at least one secondary cell, uplink transmissions 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;
b) receiving, by said wireless device, at least one timing advance command from said base station, said timing advance command comprising;
i) a time adjustment value; and
ii) an index identifying said secondary cell group;
c) applying, by said wireless device, said time adjustment value to uplink transmission timing of said secondary cell group;
d) determining, by said wireless device, a timing difference between primary cell group timing and secondary cell group timing; and
e) triggering an action, by said wireless device, in response to said wireless device detecting that said timing difference is greater than a threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless device receives a control message configuring cell groups comprising a primary cell group and a secondary cell group. The wireless device receives a timing advance command comprising a time adjustment value and an index identifying the secondary cell group. The wireless device applies the time adjustment value to uplink transmission timing of the secondary cell group. The wireless device triggers an action in response to detecting a difference between primary cell group timing and secondary cell group timing, the difference being greater than a threshold.
-
Citations
13 Claims
-
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 to cause in said wireless device; i) configuration of a primary cell and at least one secondary cell in said plurality of cells; and 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, 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 at least one secondary cell, uplink transmissions 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; b) receiving, by said wireless device, at least one timing advance command from said base station, said timing advance command comprising; i) a time adjustment value; and ii) an index identifying said secondary cell group; c) applying, by said wireless device, said time adjustment value to uplink transmission timing of said secondary cell group; d) determining, by said wireless device, a timing difference between primary cell group timing and secondary cell group timing; and e) triggering an action, by said wireless device, in response to said wireless device detecting that said timing difference is greater than a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. 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 to cause in said wireless device; (1) configuration of a primary cell and at least one secondary cell in a 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, uplink transmissions 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; ii) receive at least one timing advance command from said base station, said timing advance command comprising; (1) a time adjustment value; and (2) an index identifying said secondary cell group; iii) apply said time adjustment value to uplink transmission timing of said secondary cell group; iv) determine a timing difference between primary cell group timing and secondary cell group timing; and v) trigger an action in response to said wireless device detecting that said timing difference is greater than a threshold. - View Dependent Claims (9, 10, 11, 12, 13)
-
Specification