CELL MANAGEMENT METHOD AND A HANDOVER METHOD BETWEEN BASE STATIONS IN A FEMTOCELL SYSTEM CAPABLE OF MINIMIZING UNNECESSARY HANDOVER

摘要

PURPOSE: A cell management method and a handover method are provided to increase the accuracy of handover generated in a boundary area of a cell by reducing the size of a cell management message including the information of a neighboring base station. CONSTITUTION: A serving base station broadcasts a neighboring base station notification message to a terminal. The neighboring base station notification message includes the information of a sector, in which a terminal is located, and the information of a base station which locates in a boundary area of a cell. A neighboring base station provides cell tier information to the terminal. When a reception signal of the serving base station is maintained during timeout time set as a predetermined value, the terminal handovers data to an adjacent cell. The predetermined value is smaller than a value except for a variable hysteresis margin of handover set from the reception signal of the neighboring base station. [Reference numerals] (AA) Sharing femtosystem network topology; (BB,JJ) Terminal analyzes cell signals; (CC) Cell signal quality(time hysteresis & serving cell overlapped adjacent cell); (DD) Terminal and base station determine handover; (EE) New serving base station analyzes and registers terminal information; (FF) Applying a priority(rank 1) to a new serving cell, and sharing information with an adjacent cell; (GG) Applying a priority to an overlapped adjacent cell between a terminal and a neighboring base station & reflecting to overlapped signal analysis and handover elements; (HH) Serving cell broadcasts by reflecting the priority to MOB_NBR_ADV; (II) Sharing network topology considering the priority; (KK) Cell signal quality(serving cell overlapped second rank cell); (LL) Terminal measures Time out time; (MM) Time out(Time Hysteresis considering overlapped cells); (NN) Terminal and base station determine handover(handover as rank 2); (OO) IEEE 802. 16e, FBS handover;