Importance

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Abstract

A method and apparatus for paging a concentrated subscriber system for wireless local loop within a cellular telephone system. Within a mobile telephone switching office (MTSO) a visitor location register is generated in which a subscriber unit identification number (SUIN) for every subscriber unit registered within the area of coverage is stored along with corresponding telephone number, last cell site, and concentrated subscriber system (CSS) status information. The SUIN can correspond to the electronic serial number (ESN), mobile identification number (MIN), or other unique identification code assigned to each subscriber unit. When a call directed to a subscriber unit having a particular telephone number is received the corresponding SUIN, CSS status information, and last cell site information of that subscriber unit are determined using the visitor location directory. In response to this determination a paging code is calculated in various manners depending on the resulting CSS status information of the subscriber unit being paged. If the subscriber unit being addressed is part of a CSS the paging code used to generate the paging message is calculated in a first manner such that it is the same for each subscriber unit within a particular CSS. If the CSS status information indicates that the subscriber unit being paged is not part of a CSS the paging code is calculated in a second manner such that it is different for each subscriber unit. A set of paging parameter are then calculated using that paging code which in the preferred embodiment include a CDMA channel, a paging channel, and a paging slot. The page message is then transmitted in accordance with those paging parameters. In the preferred embodiment the page message generation process using the paging parameters is the same as that of the prior art cellular system in order to maintain maximum compatibility with those prior art systems.

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First Claim