Telephonic communications – Plural exchange network or interconnection – Connection call model
Patent
1990-03-26
1992-03-31
Dwyer, James L.
Telephonic communications
Plural exchange network or interconnection
Connection call model
379113, 340827, H04M 336, H04M 706
Patent
active
051014513
ABSTRACT:
An arrangement for routing calls from a source switch to a destination switch in a telecommunications network. If a direct trunk is available between the two switches, that trunk is used. Otherwise, the destination switch is queried to obtain availability data of trunks to that switch from intermediate switches of the network. This availability data is then compared with availability data of trunks from the source switch to the intermediate switches. A route is then selected using an intermediate switch having available trunks from the source switch and to the destination switch. If a route using lightly loaded trunk groups is available, that route is selected in preference to the use of a route using more heavily loaded trunk groups. Advantageously, routing is performed to dynamically optimize selection of a route based on the current state of the network.
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B. R. Hurley et al., "A Survey of Dynamic Routing Methods for Circuit-Switched Traffic", IEEE Communications Magazine, vol. 25, No. 9, Sep. 1987, pp. 13-21.
Ash Gerald R.
Chen Jin-Shi
Frey Alan E.
Peck Andrew W.
AT&T Bell Laboratories
Dwyer James L.
Ulrich W.
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