Patent ID: 7978645

Claim:
A method of configuring values of cell re-selection parameters for cell re-selection from a serving cell to a neighboring cell in a wireless communication system, the method comprising: receiving a first message from a network via a first control channel, the first message including values of a first group of cell selection parameters; assigning pre-stored values of the cell selection parameters for the serving cell to values of a second group of cell selection parameters if the first message does not include the values of the second group of cell selection parameters; and calculating values of the cell re-selection parameters using the values of the first group and the second group of cell selection parameters, wherein the pre-stored values of the cell selection parameters for the serving cell are received from the network in a second message via a second control channel, wherein the second group of cell selection parameters includes GPRS_RESELECT_OFFSET and GPRS_TEMPORARY_OFFSET, and wherein one of the cell re-selection parameters is a cell ranking criterion parameter (C32) for selection of a specific cell from neighboring cells, the cell ranking criterion parameter defined as: C 32( s )= C 1( s ) C 32( n )= C 1( n )+GPRS_RESELECT_OFFSET( n )− T 0( n )*(1− L ( n )), where C32(s) and C32(n) respectively denote the cell priority of parameters associated with the serving cell and the neighbor cell, C1(s) and C1(n) denote a path loss criterion parameter for the serving cell and the neighbor cell, respectively, and the GPRS_RESELECT_OFFSET parameter is for applying at least one of a prescribed offset value and a hysteresis value to each cell, and where T0( n ) and L(n) are defined as: T 0( n )=GPRS_TEMPORARY_OFFSET( n )* H (GPRS_PENALTY_TIME( n )− T ( n )), L ( n )=0 if PRIORITY_CLASS( n )=PRIORITY_CLASS( s ), L ( n )=1 if PRIORITY_CLASS( n )≠PRIORITY_CLASS( s ), where GPRS_TEMPORARY_OFFSET indicates a negative offset which is applied to C32 during GPRS_PENALTY_TIME after timer, T, is initiated in a corresponding cell and values of GPRS_RESELECT_OFFSET(n) and GPRS_TEMPORARY_OFFSET(n) are defined as 0, respectively.