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INTELLIGENT SWITCHING MODULE SERVICE PERIOD RESTRICTION METHOD FOR MOBILE DISPATCH SUBSCRIBERS WITH PROVISIONING OVER-RIDE

IP.com Disclosure Number: IPCOM000009639D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-06
Document File: 3 page(s) / 148K

Publishing Venue

Motorola

Related People

Donivon Hettich: AUTHOR

Abstract

Many mobile dispatch communication switch- ing controllers allow service to all subscribers at any time of day. This is accomplished by provisioning the subscribers into a Home Location Register (HLR), where they permanently remain. The sub- scriber's provisioning information is subsequently loaded into a Visitor Location Register (VLR) upon a request for service, where they reside until a life- time period time-out or in some cases, a successful de-registration is performed. Usually, this lifetime period is large in order to reduce the communica- tions necessary between the HLR and VLR.

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MOTVROLA Technical Developments

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   INTELLIGENT SWITCHING MODULE SERVICE PERIOD RESTRICTION METHOD FOR MOBILE DISPATCH SUBSCRIBERS WITH PROVISIONING OVER-RIDE

by Donivon Hettich

BACKGROUND

  Many mobile dispatch communication switch- ing controllers allow service to all subscribers at any time of day. This is accomplished by provisioning the subscribers into a Home Location Register (HLR), where they permanently remain. The sub- scriber's provisioning information is subsequently loaded into a Visitor Location Register (VLR) upon a request for service, where they reside until a life- time period time-out or in some cases, a successful de-registration is performed. Usually, this lifetime period is large in order to reduce the communica- tions necessary between the HLR and VLR.

PROBLEM

  In some systems, the subscriber's somewhat sta- tic VLR entry utilizes unnecessary controller resources if the service is to be used strictly for working shifts, or for a specific time of day; reduc- ing the capacity and cost effectiveness of the HLR and VLR. For example, if a set of subscribers were limited to the fnst, second, and third shifts, a poten- tial of three times the number of subscribers could be served by the same components given these shifts occur during different times of the day. Decreasing a standard VLR entry lifetime time-out period is not an effective solution in that it applies to all sub- scribers, or a group of subscribers that may or may not have common usage time patterns, which may effectively reduce the HLR and VLR component capacities.

  Therefore, if a means were provided to restrict service to particular subscribers during certain time periods, a large number of subscribers could be pro- vided service by the same number of switching con- trollers provided that a cross section of the sub- scribers require service in orthogonal time periods.

  Additionally, if service is not to be restricted, the VLR could attempt to maintain the VLR subscriber entries based on subscriber usage patterns in an attempt to free unnecessarily reserved resources and then retrieve the information from the HLR upon or

just before need.

  This results in a more efficient use of both the HLR and VLR resources if the registration of restricted subscribers is denied or the entry removed until service is necessary. Service plans could be marketed, providing a reduction in end user service cost and an increase to the total number of sub- scribers which may obtain service using the same serving network equipment.

  However, learning the usage patterns of sub- scribers and determining the orthogonal time peri- ods between that set of subscribers to maximize equipment capacity can be time consuming and a maintainability problem as subscriber service usage patterns change.

  Therefore, a means to continually learn sub- scriber usage patterns and the ability to provision or over-ride those patterns in order to allow service during off-hours would be helpful.

SOLUTION

  Thi...