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Abstrac This paper focuses on the problem of location update and terminal paging. In order to save the limited wireless channel resource, mobile terminals should not update their location information whenever they crossing the boundaries of adjacent cells. Similarly, network should not page every cell one by one when an incoming call arrives. In this paper, a sector-based location management scheme (SLMS) is proposed. In SLMS, we use sector-based location update scheme and sectorpaging scheme. An analytical model is developed to calculate the cost and we compare the cost of SLMS with that of existing scheme. The numerical results show that our SLMS has a good performance when the number of incoming calls is high.Keywords location management; sector-based location management scheme; location update; terminal paging . INTRODUCTIONLocation management is a key component in the wireless personal communications networks. The networks track the mobile terminal (MT) using signalling. Due to the increasing population of mobile subscribers, PCS networks will have to support a large number of users, so a great number of radio signalling should be processed by the network. How to reduce the signalling is a more and more important problem.To locate a MT in PCS network must use the location management scheme. In general the location management have two fundamental processes, location update (LU) and paging. Location update is the operation that MT informs the network about its current location, and paging is the process to find the MT when an incoming call arrives. If location update is performed whenever a MT moves from one cell to another, the network will always know the exact location of each MT. When a connection needs to be established for a particularly MT, the network simply routes the call to the last reported location of the MT. However, if the incoming call arrival rate to the MT is small and the mobility of the MT is large, this scheme is not cost effective. In this situation, the network wastes its resource by processing frequent update information, and the MT wastes its power transmitting the update signal. The cost effectiveness can be improved by reducing the frequency of location update such that updating is not performed after each move. In case of terminal paging, the network searches for the MT by sending polling signals to all the cells in a location area (LA). This search scheme is called blanket paging. If the MT is situated nearby the center cell where the last location update was done, many unwanted cells have to be paged, and then the cost of paging is increased. Therefore there is a trade-off between the costs of location update and paging. The core problem of location management is to minimize the total cost of location update and paging. Some advanced schemes [1]-[3] were proposed to reduce the total cost of location update and paging. These schemes include the distance-based, time-based, movement-based, and DBLU schemes. However, [1] did not compare the paging cost in the model. All three schemes ...

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