Telephonic communications – Plural exchange network or interconnection
Reexamination Certificate
1997-09-12
2001-10-30
Matar, Ahmad (Department: 2642)
Telephonic communications
Plural exchange network or interconnection
C379S220010
Reexamination Certificate
active
06310950
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention concerns a method, an exchange and a telecommunications network for controlling the establishment of connections to a subscriber who is the destination of a mass calling.
2. Discussion of Related Art
Mass callings to a telecommunications network subscriber, for example prompted by radio and television surveys or contests, can lead to instabilities, bottlenecks or blockages within the telecommunications network. Many short-time calls take place within a limited time interval in the exchanges of the telecommunications network, which displace more economical normal calls. If the operator of the telecommunications network has previously been advised of such actions, he can use choking means, for example call gapping or leaky bucket per CCITT recommendation E.412, to reduce or prevent bottlenecks and blockages within the telecommunications network.
SUMMARY OF INVENTION
It is the task of the following invention to reduce or prevent instabilities, bottlenecks or blockages within a telecommunications network which are caused by mass callings to subscribers.
According to a first aspect of the invention, a method of controlling the establishment of connections to a subscriber who is the destination of mass calling in a telecommunications network with exchanges, comprises a detection of a mass-calling situation is carried out in exchanges, wherein the occurrence of the mass calling to said subscriber is detected, and wherein a back-signaling message for releasing a busy connection to said subscriber contains information which indicates the occurrence of the mass calling to the exchanges involved in the establishment of the busy connection.
According to a second aspect of the invention, an exchange for controlling the establishment of connections to a subscriber who is the destination of mass calling in a telecommunications network with exchanges comprises a first means for detecting a mass-calling situation and a second means for generating a back-signaling message for releasing a busy connection to said subscriber, said back-signaling message, if the first means detects the mass-calling situation, containing information which indicates the occurrence of the mass-calling situation to the exchanges involved in the establishment of the busy connection.
According to a third aspect of the invention, an exchange for controlling the establishment of connections to a subscriber who is the destination of mass calling in a telecommunications network with exchanges comprises a receiving means for receiving a back-signaling message for releasing a busy connection to said subscriber, said back-signaling message containing information which indicates the occurrence of the mass-calling situation, and a choking means for limiting the traffic toward the destination of the mass calling in response to the reception of said information.
According to a fourth aspect of the invention, a telecommunications network for controlling the establishment of connections to a subscriber who is the destination of mass calling comprises an exchange according to the second aspect of the invention and an exchange according to the third aspect of the invention.
An advantage of the present invention is that the control of the establishment of connections in the case of the occurrence of a mass calling to the subscriber takes place automatically. Furthermore, no special signalling messages need to be transmitted to other exchanges of the telecommunications network to limit the traffic to the subscriber who is the destination of the mass calling.
In an advantageous configuration of the invention, information is signalled to an exchange involved in the establishment of the busy connection so that this exchange can limit the traffic toward the destination of the mass calling to a throughput rate which is dependent on the information.
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CCITT Recommendation E.412, ppl. 21-29, “Network Management Controls”.
“Advanced Traffic Control Methods for Network Management” K. Mase et al, 2460 IEEE Communications Magazine 28 (1990) Oct. No. 10, New York, pp. 82-88.
Barnsteiner Rupert
Hollas Markus
Münch Rainer
Spildener Kurt
Stratenberg Gernot
Alcatel
Deane, Jr. William J.
Matar Ahmad
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