Apparatus and method for querying replicated databases using segmentation directories
First Claim
1. A telephone network comprising:
- a plurality of segmentation directories;
a switch coupled to the plurality of segmentation directories for receiving a query having a header addressed to the switch, and for altering the header so as to be addressed to at least one of the segmentation directories selected according to a round-robin algorithm in response to the query; and
a signal transfer point coupled between the switch and the segmentation directories.
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Abstract
The apparatus and method of the present invention provides even loadsharing of round-robin querying of replicated databases in a network architecture which responds to network conditions. The network architecture utilizes a round-robin routing table that includes correlated index numbers, point codes and addresses of the replicated databases. The network architecture responds to incoming queries with searching of the round-robin routing table by incrementing to a successor index number and an associated point code. The network architecture may further determine whether the database at the address pointed by the point code is accessible. If not, the network architecture increments to another successor index number to locate an accessible database. When an accessible database is found, the point code is set to the address of the accessible database and the query is forwarded to that address.
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Citations
13 Claims
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1. A telephone network comprising:
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a plurality of segmentation directories; a switch coupled to the plurality of segmentation directories for receiving a query having a header addressed to the switch, and for altering the header so as to be addressed to at least one of the segmentation directories selected according to a round-robin algorithm in response to the query; and a signal transfer point coupled between the switch and the segmentation directories. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A telephone network comprising:
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a plurality of signal transfer points coupled to the 4ESS switch; a plurality of segmentation directories each coupled to at least two of the signal transfer points via SS7 links; and a switch comprising a 4ESS switch for receiving a query having a Message Transfer Part header addressed to the switch, and for altering the Message Transfer Part header so as to be addressed to at least one of the segmentation directories selected according to a round-robin algorithm in response to the query.
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8. In a telephone network, a method comprising the steps of:
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receiving a telephone call at a network switch, the telephone call comprising a query; selecting a first segmentation directory from a plurality of segmentation directories according to a round-robin algorithm; and directing the query to the first segmentation directory, wherein the query includes a header addressed to the switch, the step of directing including altering the header so as to be addressed to the selected segmentation directory. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification