Radio connection re-establishment method, user equipment and base station

A method of re-establishing a radio connection to a cell among different types of cells, the method comprising:

• obtaining multiple first preset numbers to indicate a number of out-of-synchronization indications to be received, multiple second preset numbers to indicate a number of synchronization indications to be received, and multiple timer durations,
• at least the multiple timer durations being set to correspond to one or more cell information, respectively, of,
• different cell coverage ranges of the different types of cells,
• different transmit power strengths of the different types of cells,
• physical cell identifiers (PCIs) of the different types cells,
• types of the different types of cells, and/or
• first ranges of the different types of cells,
• wherein
• the different types of cells have different coverage ranges or different transmit power strengths, and
• a first range of a cell, among the different types of cells, is a range in which a signal strength of the cell in a coverage range of a macro cell, among the different types of cells, is greater than a signal strength of a macro cell among the different types of cells;
• and
• sending the first, second preset numbers and the multiple timer durations to a user equipment (UE), to cause the UE to start a corresponding timer if the UE obtains a first preset number of out-of-synchronization indications continuously and to cause the UE to trigger a radio resource control (RRC) re-establishment procedure if a second preset number of synchronization indications are not received before timeout of the corresponding timer.

A base station, comprising:

• at least one processor to control a cell re-establishment operation to,
• obtain multiple first preset numbers to indicate a number of out-of-synchronization indications to be received, multiple second preset numbers to indicate a number of synchronization indications to be received, and multiple timer durations,
• the multiple first, second preset numbers and the multiple timer durations being set to correspond to one or more cell information, respectively, of,
• different cell coverage ranges of the different types of cells,
• different transmit power strengths of the different types of cells,
• physical cell identifiers (PCIs) of the different types of cells,
• types of the different types of cells,
• first ranges of the different types of cells,
• wherein
• the different types of cells have different coverage ranges or different transmit power strengths, and
• a first range of a cell, among the different types of cells, is a range in which a signal strength of the cell in a coverage range of a macro cell, among the different types of cells, is greater than a signal strength of a macro cell among the different types of cells;
• and
• send the multiple first, second preset numbers and the multiple timer durations to a user equipment (UE), to cause the UE to start a corresponding timer if the UE obtains a corresponding first preset number of out-of-synchronization indications continuously and to cause the UE to trigger a radio resource control (RRC) re-establishment procedure if a corresponding second preset number of synchronization indications are not received before timeout of the timer.

A base station, comprising:

• at least one processor to control a cell re-establishment operation to,
• obtain multiple first preset numbers to indicate a number of out-of-synchronization indications to be received, multiple second preset numbers to indicate a number of synchronization indications to be received, and multiple timer durations,
• at least the timer durations being set to correspond to one or more cell information, respectively, of,
• different cell coverage ranges of the different types of cells,
• different transmit power strengths of the different types of cells,
• physical cell identifiers (PCIs) of the different types of cells,
• types of the different types of cells,
• first ranges of the different types of cells,
• wherein
• the different types of cells have different coverage ranges or different transmit power strengths, and
• a first range of a cell among the different types of cells is a range in which a signal strength of the cell in a coverage range of a macro cell, among the different types of cells, is greater than a signal strength of a macro cell among the different types of cells;
• and
• send the first, second preset numbers and the multiple timer durations to a user equipment (UE), to cause the UE to start a corresponding timer if the UE obtains a first preset number of out-of-synchronization indications continuously and to cause the UE to trigger a radio resource control (RRC) re-establishment procedure if a second preset number of synchronization indications are not received before timeout of the corresponding timer.