Patent ID: 8831646

Claim:
A method comprising: receiving an indication of a discontinuous reception period and an indication of a number of paging groups; determining paging occasions for a user equipment by applying the indicated discontinuous reception period, the indicated number of paging groups and an identifier of the user equipment to a predetermined formula; and monitoring a control channel during the determined paging occasions, wherein the predetermined formula comprises: SFN mod IDLE_Mode — DRX _Period=(IDLE_Mode — DRX _Period div Paging_Group_Count)*(ID)mod(Paging_Group_Count); wherein SFN is system frame number, Idle_Mode_DRX_Period is the discontinuous reception period, Paging_Group_Count is the number of paging groups, and ID is the identifier of the user equipment which comprises an international mobile subscriber identity of the user equipment or a value derived from the international mobile subscriber identity.