Method of enhancing call processing in a number portability envi

Details Method of enhancing call processing in a number portability envi Method of enhancing call processing in a number portability envi

1997-05-22

2000-05-02

Chin, Wellington

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455461, 379220, H04Q 720

Patent

active

060583134

ABSTRACT:
A method is provided which reduces post-dial delay in a number portability environment. In particular, a switching office which controls call routing to portable numbers (NPA-NXXs) contains a cache for which location routing number response information may be stored. The processing office concurrently checks the cache for LRN response information corresponding to the dialed number and launches a query to a number portability database. Thus, if the LRN response information in the cache is valid then the call will be routed in the timeliest manner. However, if either the cache does not have any LRN response information or the LRN response information in the cache proves not to be valid then, the switching office will have received the LRN response information from the database more quickly based on the concurrent launching of a query. Therefore, a more timely attempt at establishing a proper connection to the dialed number will occur thereby reducing post-dial delay.

REFERENCES:
patent: 5602909 (1997-02-01), Carkner et al.
patent: 5610977 (1997-03-01), Williams et al.
patent: 5625681 (1997-04-01), Butler, II
patent: 5661792 (1997-08-01), Akinpelu et al.
patent: 5717748 (1998-02-01), Sneed, Jr. et al.
patent: 5717749 (1998-02-01), Sneed, Jr. et al.
patent: 5793857 (1998-08-01), Barnes et al.
patent: 5887056 (1999-03-01), Sonnenberg

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