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Browse Prior Art Database

PAGING IN SEVERAL STAGES

IP.com Disclosure Number: IPCOM000008530D
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2002-Jun-20
Document File: 3 page(s) / 98K

Publishing Venue

Motorola

Related People

Rod Averbuch: AUTHOR

Abstract

The DAP holds the current location information of the subscriber location area in a safe backup of the dispatch subscriber (VLR). Maintaining a real disk that will be updated using a low priority time VLR double copy could have hvo problems. task that will not load the DAP CPU.

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0 M MO-LA

Technical Developments

PAGING IN SEVERAL STAGES

by Rod Averbuch

  The DAP holds the current location information of the subscriber location area in a safe backup of the dispatch subscriber (VLR). Maintaining a real disk that will be updated using a low priority time VLR double copy could have hvo problems. task that will not load the DAP CPU.

1. Real time updating of two tables will load the already loaded CPU.

  During crash recovery the DAP will read rhe backup disk information and process it before paging a subscriber.
2. VLR information could not be trusted after a DAP crash.

  Here are three solutions which will not require real time second VLR data base yet, it will mini- mize the down time during VLR recovery.

* The DAP will first page using the location are in the backup copy. There is a very high probability that the subscriber will still be in this area (6-10 miles diameter).

1. The DAP will maintain a loosely coupled copy

* The subscriber will be paged again over all the area after first page time out.

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Fig. 1

24 March 1998

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MOTOROLA Technical Developments

paging a subscriber.

2. The DAP will maintain a loosely coupled copy of the subscriber location area in a safe backup disk that will be updated using a low priority task that will not load the DAP CPU.

The DAP will also stamp the updated location areas.

During crash recovery the DAP wil...