| 主权项 |
1. A method for use in a wireless device, the method comprising:
a) receiving, from a base station, at least one first radio resource control (RRC) message comprising configuration parameters of a plurality of cells comprising a primary cell and at least one secondary cell, said plurality of cells being grouped into 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 signal transmissions by said wireless device in said primary cell group employing a first synchronization signal on said primary cell as a primary timing reference; andii) a secondary cell group comprising a second subset of said at least one secondary cell, uplink signal transmissions by said wireless device in said secondary cell group employing a second synchronization signal on a secondary cell in said secondary cell group as a secondary timing reference; b) receiving, from said base station, a second RRC message, said second RRC message:
i) configurable to cause modification of a cell group a secondary cell without explicitly releasing said secondary cell if said second RRC message comprises mobility control information; andii) unconfigurable to cause modification of the cell group of said secondary cell without explicitly releasing said secondary cell if said RRC message does not comprise mobility control information; c) modifying the cell group of said secondary cell by releasing said secondary cell and then adding said secondary cell with a different cell group index, if said second RRC message does not comprise mobility control information; and d) initiating a handover if said second RRC message comprises mobility control information. |
