Switching control system for controlling physical connection str

Details Switching control system for controlling physical connection str Switching control system for controlling physical connection str

1995-05-30

1997-09-02

Hsu, Alpus H.

Multiplex communications

Pathfinding or routing

Through a circuit switch

370395, H04Q 1104

Patent

active

056639473

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

In present-day switching systems, the user software for controlling the connections is still largely dependent on the hardware architecture of the switching system.
Switching application software which is split into a plurality of components is known from the article "Object Oriented Software Technologies Applied to Switching Architectures and Software Development Processes" by E. C. Arnold et al. from the "International Switching Symposium 1990, Volume 2, June 1990, Stockholm SE, pages 97-106". In this case, the components represent logic and physical system entities. The component "call" represent, for example, the system entity "call". In this case, the component "call" controls the system entity "call" both at the logic level and at the physical level (with the exception of the local physical connection control, which is carried out by the local components of the "fabric" type).
A layered switching control architecture is known from the article "Switch Architecture for the Intelligent Network" by Steve Cannon from the "Proceeding of the national communications forum, Volume 45, October 1991, Oak Brook, Ill., U.S., pages 185 to 193".


SUMMARY OF THE INVENTION

The invention is based on the problem of achieving decoupling of the user systems from the hardware architecture of the switching system.
This problem is solved by a switching control system of the present invention for controlling the physical connection structures in a switching system. The switching control system has the following features: means for receiving connection requests from at least one user system, the user system being used to control the logic connection structures, and a connection request containing identifiers for the connection end points affected by it; means for processing the said connection requests, which means calculate a physical path through the switching networks of the switching system on the basis of a connection request; and means for transmitting commands to resource systems for local control of the resources which are affected by the calculated physical path.
On the basis of the introduction of the central switching control system according to the invention, the user systems can formulate their connection requests in a manner which is independent of the hardware architecture of the switching system. This ensures that the user systems are independent of the hardware architecture of the switching system. Since the resource handling is carried out by autonomous resource systems, permanent assignment of the switching control system to a specific central control processor is unnecessary.
A further embodiment of the invention is characterized in that the means for processing the connection requests from a user system process received connection requests independently of one another. As a result of this embodiment, the independence of the switching control system according to the invention from the specific structure of a user system is further enhanced.
A further embodiment of the invention is characterized by means for transferring the data of the physical path which is set by the resource systems to the user system which submits the connection request. In the case of this embodiment of the invention, the switching control system requires no means for storing the path-related data of existing connections.
A switching system of the present invention has the following features: at least one control processor for carrying out central control processes; one, and only, switching control system as described above per control processor; at least one user system for controlling the logic connection structures per control processor; and local resource systems for controlling the resources of the switching system, which resource systems carry out commands of the switching control system. The switching system preferably has the advantage that the user systems are decoupled from the switching control system. This ensures that the user systems are independent of the physical connection structure, and

REFERENCES:
patent: 4761779 (1988-08-01), Nara et al.
patent: 4905222 (1990-02-01), Seeger et al.
patent: 5067123 (1991-11-01), Hyodo et al.
patent: 5390171 (1995-02-01), Storm

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