Multiplex communications – Pathfinding or routing – Through a circuit switch
Reexamination Certificate
1998-02-27
2001-01-09
Cangialosi, Salvatore (Department: 2732)
Multiplex communications
Pathfinding or routing
Through a circuit switch
C370S259000
Reexamination Certificate
active
06172976
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a telecommunications service control unit within a telecommunications switching network and method of operation of the telecommunications service control unit, and more particularly, to controlling a call processing between a call originating terminal and called terminal including switching operations.
2. Description of the Related Art
The conventional service control unit of this type described above uses a plurality of specific controls corresponding to user's requests, in addition to effecting the operation of a standard communication control system prepared in advance, as described in Japanese Patent Application Laid-Open No. 216568/87.
FIG. 1
is a block diagram illustrating an example of a conventional telecommunication service system configuration.
Service controller
801
is provided for corresponding to every connection services, contains a descriptive operating procedure, calls service common management/control means
821
for implementation and controls a requested telecommunications service, and as service control unit
101
, controls service implementation device
251
thereby to implement the communication service according to the instruction of the service controller
801
.
Service common management/controller
821
has a data library for control procedures necessary for all telecommunications services, from which the procedures of implementing a requested service are called out by service controller
801
, the procedures are referred to control such telecommunications apparatus as subscriber circuit controller
211
and switching controller
221
; and the control procedures are executed through implementation device
251
upon called from service control means
801
.
Terminals
241
and
242
connected to each other via subscriber circuit controller
211
, switching controller
221
and subscriber circuit controller
212
. A service implementation processing involved in this connection, is executed by service control unit
101
which drives service controller
801
and service common management/controller
821
, so that subscriber circuit controller
211
, switching controller
221
, media controller
231
and subscriber circuit controller
212
are controlled through apparatus control interface
261
.
In executing this processing, service implementation device
251
is controlled by service controller
801
which applies service control-use memory
811
as a storage, causing each terminal controller to implement a requested service via service common management/controller
821
which applies service common management/controller-use memory
831
as a storage.
It is noted here that media controller
231
is a voice storage and/or a voice synthesizer unit, etc.
Next, referring to
FIG. 1
, this conventional technique is described in accordance with its functional aspect.
Terminal
241
requests service control unit
101
for a service through subscriber circuit controller
211
. In response to this request, service control unit
101
judges the service required, selecting the control procedure corresponding to the requested service through service controller
801
, and instructing service implementation device
251
to execute the control procedure selected by service controller
801
.
Service controller
801
is defined to call service common management/controller
821
which holds feasible processing procedures as the library within service control unit
101
and implementation device
251
undertakes a service implementation processing, under the control of service controller
801
.
The information, which is temporarily required during the operation of service controller
801
is written into and read out from service controller-use memory
811
according to the procedure built-in service controller
801
.
Service common management/controller
821
starts functioning in response to a call from service controller
801
.
Service common management/controller
821
has calling procedures to call each of such functions of subscriber circuit controller
211
, media controller
231
, switching controller
221
, subscriber circuit controller
212
, etc. which are driveable by service control unit
101
and in response to a request from service controller
801
, operates such telecommunications apparatus as subscriber circuit controller
211
, and so forth, via apparatus control interface
261
.
The information, which is temporarily required while service common management/controller
821
is proceeding with its processing, is stored into and read out from service common management/control-use memory
831
, following the procedure contained in service common management/control means
821
.
FIG. 2
is a block diagram illustrating one example of the conventional telecommunications service control system, wherein the principle of the invention disclosed in above Japanese Patent Application Laid-Open Publication No. 216568/87 is described. In the conventional telecommunications control system disclosed in the Japanese Patent Application Laid-Open Publication, controller (CC)
911
controls switching/connection-use communication path
901
according to a given procedure.
Logic node
922
includes therein data
951
related to service users, processing procedure
961
, etc. for satisfying a service user request. A detail of internal configuration
931
of node
922
is denoted in FIG.
2
.
Next, referring to
FIG. 2
, the conventional communication service control system is described with regard to its functioning. User A sends out a request a call with B to controller
911
through communication path
901
. Controller
911
starts node
921
corresponding to user A and then transfers an incoming call information to node
922
corresponding to user B.
Node
922
keeps information
931
concerning user B, as shown in the figure, and executes a judgment whether the incoming call is accepted or transferred to elsewhere.
The result of the judgment at node
922
is reported to controller
911
, and following this reported information, controller
911
controls communication path
901
for a connection processing.
However, the conventional technique confronts with the problems which will be referred to hereunder:
The first problem lies in that to enable controlling a newly added communication apparatus from service control unit
101
, it is needed to modify, over a great extent, the operational contents stored in the service common management/controller.
The reason thereof is that in the conventional service control unit
101
, respective telecommunications apparatus operating procedures are integrally contained in the service common management/controller in wholly configuration thereto, thus not allowing to renew the telecommunications apparatus operating procedures alone.
The second problem consists in that when a service controller and service common management/controller defined to operate within a service control unit are forced to implement across a plurality of service control unit, it is necessary to greatly modify the operational contents included in the service common management/controller.
The reason thereof is that to implement a service which needs to operate across a plurality of service control units, it is required to simultaneously control the telecommunications devices associated with this service from plural service controllers, because in spite of the requirement that an arbitration processing must be undertaken among service control units, for each telecommunications apparatus in a manner that respective controls of individual communication apparatus may not conflict with one another, as pointed out regarding the reason of the first problem, the communication apparatus operating procedures are stored in the service common management/controller, resulting in necessity to contain a required arbitration processing procedure in the service common management/controller.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention, which is achieved in conside
Cangialosi Salvatore
Foley & Lardner
NEC Corporation
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