Call control in exchange suitable for intelligent network

Claim 1

A call control apparatus for an exchange connected via a network to a service control point that centrally provides additional service processing for a plurality of exchanges acting as service switching points, comprising: a plurality of basic call modules, each for executing basic call processing for causing a call state transition from current stable state to next stable state each time one of the basic call modules is activated; a plurality of intelligent network IN call modules, each for executing IN call processing for causing a second call state transition, each time one of the IN call modules is activated, to a state in which transmission processing necessary to transmit a message to the service control point is completed or to a state in which reception processing necessary to receive a message from the service control point is completed, each IN call module being capable of operating independently of the basic call modules; and execution control means for, when a call requires the processing of the additional service, inserting the IN call processing by at least one of the IN call modules into the basic call processing, wherein some of the basic call modules execute detecting point DP processing for detecting whether or not the call requires the processing of the additional service, and the execution control means includes: a basic call processing execution controlling section for selectively activating a basic call module based on a combination of the current state of the call and an event, said current state including the stable state and a basic call processing resumption waiting state, the call coming into said basic call processing resumption waiting state when it is detected in the DP processing that the call requires the processing of the additional service, said event including a basic call event occurring in the stable state and an IN event reported by one of the IN call modules in the basic call processing resumption waiting state; and an IN call processing execution controlling section for selectively activating an IN call module based on a type of a message from the service control point or a type of DP reported by one of the basic call modules when it is detected in the DP processing that the call requires the processing of the additional service.

Claim 9

A method of call control in an exchange connected via a network to a service control point that centrally provides additional service processing for a plurality of exchanges acting as service switching points, comprising the steps of: (a) executing basic call processing by sequentially activating a plurality of basic call modules, each for executing basic call processing for causing a call state transition from current stable state to next stable state each time one of the basic call modules is activated; and (b) inserting intelligent network IN call processing by at least one of a plurality of IN call modules into the basic call processing when a call requires the processing of an additional service, each IN call module executing the IN call processing for causing a second call state transition to a state in which transmission processing necessary to transmit a message to the service control point is completed or to a state in which reception processing necessary to receive a message from the service control point is completed, each IN call module being capable of operating independently of the basic call modules, wherein some of the basic call modules execute detecting point DP processing for detecting whether or not the call requires the processing of the additional service, and step (b) includes the substeps of: selectively activating a basic call module based on a combination of the current state of the call and an event, said current state including the stable state and a basic call processing resumption waiting state, the call coming into said basic call processing resumption waiting state when it is detected in the DP processing that the call requires the processing of the additional service, said event including a basic call event occurring in the stable state and an IN event reported by the IN call module in the basic call processing resumption waiting state; and selectively activating an IN call module based on type of a message from the service control point or type of DP reported by the basic call module when it is detected in the DP processing that the call requires the processing of the additional service.

Claim 10

A method of call control in an exchange connected via a network to a service control point that centrally provides additional service processing for a plurality of exchanges acting as service switching points, comprising the steps of: (a) executing basic call processing by sequentially activating a plurality of basic call modules, each for executing basic call processing for causing a call state transition from current stable state to next stable state each time one of the basic call modules is activated; and (b) inserting intelligent network IN call processing by at least one of a plurality of IN call modules into the basic call processing when a call requires the processing of an additional service, each IN call module executing the IN call processing for causing a second call state transition to a state in which transmission processing necessary to transmit a message to the service control point is completed or to a state in which reception processing necessary to receive a message from the service control point is completed, each IN call module being capable of operating independently of the basic call modules, wherein some of the basic call modules execute detecting point DP processing for detecting whether or not the call requires the processing of the additional service, and step (b) includes the substeps of: selectively activating a basic call module based on a combination of the current state of the call and an event, said current state including the stable state and a basic call processing resumption waiting state, the call coming into said basic call processing resumption waiting state when it is detected in the DP processing that the call requires the processing of the additional service, said event including a basic call event occurring in the stable state and an IN event reported by the IN call module in the basic call processing resumption waiting state; and selectively activating an IN call module based on type of a message from the service control point or type of DP reported by the basic call module when it is detected in the DP processing that the call requires the processing of the additional service.

Claim 12

A method of call control in an exchange connected via a network to a service control point that centrally provides additional service processing for a plurality of exchanges acting as service switching points, comprising the steps of: (a) executing basic call processing by sequentially activating a plurality of basic call modules, each for executing basic call processing for causing a call state transition from current stable state to next stable state each time one of the basic call modules is activated; and (b) inserting intelligent network IN call processing by at least one of a plurality of IN call modules into the basic call processing when a call requires the processing of an additional service, each IN call module executing the IN call processing for causing a second call state transition to a state in which transmission processing necessary to transmit a message to the service control point is completed or to a state in which reception processing necessary to receive a message from the service control point is completed, each IN call module being capable of operating independently of the basic call modules, wherein each basic call module and each IN call module are activated as tasks capable of operating virtually in a concurrent manner under control of an operating system, and further comprising the step of temporarily stopping only an active IN call module selectively.

Claim 13

A method of call control in an exchange connected via a network to a service control point that centrally provides additional service processing for a plurality of exchanges acting as service switching points, comprising the steps of: (a) executing basic call processing by sequentially activating a plurality of basic call modules, each for executing basic call processing for causing a call state transition from current stable state to next stable state each time one of the basic call modules is activated; and (b) inserting intelligent network IN call processing by at least one of a plurality of IN call modules into the basic call processing when a call requires the processing of an additional service, each IN call module executing the IN call processing for causing a second call state transition to a state in which transmission processing necessary to transmit a message to the service control point is completed or to a state in which reception processing necessary to receive a message from the service control point is completed, each IN call module being capable of operating independently of the basic call modules, wherein each basic call module and each IN call module are activated as tasks capable of operating virtually in a concurrent manner under control of an operating system, and further comprising the step of temporarily stopping only an active IN call module selectively.

Claim 14

A method of call control in an exchange connected via a network to a service control point that centrally provides additional service processing for a plurality of exchanges acting as service switching points, comprising the steps of: (a) executing basic call processing by sequentially activating a plurality of basic call modules, each for executing basic call processing for causing a call state transition from current stable state to next stable state each time one of the basic call modules is activated; and (b) inserting intelligent network IN call processing by at least one of a plurality of IN call modules into the basic call processing when a call requires the processing of an additional service, each IN call module executing the IN call processing for causing a second call state transition to a state in which transmission processing necessary to transmit a message to the service control point is completed or to a state in which reception processing necessary to receive a message from the service control point is completed, each IN call module being capable of operating independently of the basic call modules, wherein each basic call module and each IN call module are activated as tasks capable of operating virtually in a concurrent manner under control of an operating system, and further comprising the step of counting the number of active IN call modules.

Claim 15

A method of call control in an exchange connected via a network to a service control point that centrally provides additional service processing for a plurality of exchanges acting as service switching points, comprising the steps of: (a) executing basic call processing by sequentially activating a plurality of basic call modules, each for executing basic call processing for causing a call state transition from current stable state to next stable state each time one of the basic call modules is activated; and (b) inserting intelligent network IN call processing by at least one of a plurality of IN call modules into the basic call processing when a call requires the processing of an additional service, each IN call module executing the IN call processing for causing a second call state transition to a state in which transmission processing necessary to transmit a message to the service control point is completed or to a state in which reception processing necessary to receive a message from the service control point is completed, each IN call module being capable of operating independently of the basic call modules, wherein each basic call module and each IN call module are activated as tasks capable of operating virtually in a concurrent manner under control of an operating system, and further comprising the step of counting the number of active IN call modules.