Title :
Concurrently searching for mobile users in cellular networks
Author :
Gau, Rung-Hung ; Haas, Zygmunt J.
Author_Institution :
Inst. of Commun. Eng., Nat. Sun Yat-Sen Univ., Kaoshiung, Taiwan
fDate :
6/1/2003 12:00:00 AM
Abstract :
In today´s systems, upon arrival of calls to mobile users, the system attempts to locate the users sequentially (one by one) through a paging operation. In this letter, we propose to concurrently search for a number of mobile users in a mobile network, significantly reducing the cost of locating mobile users. The reduction in the paging costs due to such a concurrent search can be quite substantial, depending on the knowledge of the probabilities of the users´ locations, the number of cells in the network, and the number of mobiles to be located. Additionally, we propose a low-complexity heuristic that reduces the average paging cost by 25%, in the case of no knowledge of probabilities of the mobiles´ locations. With such knowledge, further reduction in the average paging costs of up to 90% can be achieved.
Keywords :
cellular radio; paging communication; probability; radio direction-finding; cells; cellular networks; concurrent search; low-complexity heuristic; mobile users; paging costs; paging operation; probabilities; Base stations; Costs; Delay effects; Intelligent networks; Land mobile radio cellular systems; Mobile radio mobility management; Research initiatives; Tracking;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2003.813995