Abstract:
A call processing method during terminating BUSY states (busy, power down, and paging failure) of a terminal in a radio intelligent network system comprises: a step of detecting the terminating BUSY state of the terminal from an HLR (Home Location Register); a step of performing OBUSY operation between an SCP and a T_Busy DP in a T_SSP when the terminating BUSY state is detected; a step of generating an O_BCSM as a result of the operation; and a step of re-attempting call connect to a termination switch number which transmitted to the generated O_BCSM.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to a radio intelligent network system, and particularly, to a call processing method when a terminal is in terminating BUSY states (busy, power down, and failure in paging) and in the terminal pause state.  
           [0003]    2. Description of the Background Art  
           [0004]    An earlier communication system is a system in which a person in front of an exchanger processes various customers requests. However, a mechanical exchanger had developed, and an electronic exchanger is commonly used in present communication system. The automation makes processing speed or capacity to be increased, however, it can not process the various requests of the customers actively.  
           [0005]    In order to solve above problems, there is developed an IN (Intelligent Network). The IN is a structural concept for introducing a new service and providing a new function in an electric communication network, the IN increases service introduction speed, extends a range of the service, and makes a plurality of producers to be able to develop services independently. The IN can be applied to PSTN (Public Switched Telephone Network), PSDN (Packet Switched Data Network), N-ISDN (Narrowband—Integrated Services Digital Network), and to B-ISDN (Broadband Integrated Services Digital Network) according to types, and supports various services including supplementary services. Also, the intelligent network uses information process techniques, and network resources, provides standardized communication between networks through the services and independent interface, and provides a function which can integrate services by associating the functions of the networks to the service provider. In addition, the service subscriber can control properties of the service related to the subscriber and to the user.  
           [0006]    Generally, WIN (Wireless Intelligent Network) standard comprising IS-771, PN4287, and PN4289 is used for embodying the intelligent network in the present mobile communication system. The call process of the intelligent network suggested by the WIN standard comprises call control function (hereinafter, referred to as CCF), and service switching function (hereinafter, referred to as SSF). The CCF is a functional module for call connection and controlling function. In addition, the SSF is a module which performs service exchanging function connected to the CCF, and makes the intelligent network service by control of a SCP (Service Control Point) to be made by providing an interaction function between the CCF and a service control function (hereinafter, referred to as SCF).  
           [0007]    The call control and management in the intelligent network by the CCF/SSF is made on the basis of BCSM (Basic Call State Model) in SSP (Service Switching Point). The BCSM is divided into O_BCSM and T_BCSM, and shows call process and state of half call unit.  
           [0008]    [0008]FIG. 1 is a flow chart of signal process showing the conventional intelligent network for processing a call in termination busy state when the terminal is in the terminating BUSY states (busy, power down, and failure in paging) in a wired network.  
           [0009]    As shown therein, the intelligent network system in the wired network comprises an SSP on originated side (O_SSP)  100 , an HLR (Home Location Register)  200 , an SCP (Service Control Point)  300 , and an SSP on terminated side (T_SSP)  400 . Also, the O_SSP comprises an O_BCSM  110  and a T_BCSM  120 , and the T_SSP  400  comprises a VLR (Visitor Location Register)  410 , an O_BCSM  420 , and T_BCSM  430 .  
           [0010]    When a mobile terminal on originated side tries to call connect to a terminal of mobile communication subscriber, an Analyzed_Information PIC (Point In Call)  111  of the O_SSP  100  detects the origination of the terminal of the mobile subscriber on terminated side and transmits location request signal to the HLR  200  (S 100 ). The HLR  200  received the location information request signal transmits a route request signal to the VLR  410  of the T_SSP  400  (S 100 ), and the VLR  410  transmits the route signal to the HLR  200  (S 120 ). Therefore, the HLR  200  detects that the mobile terminal on the terminated side is in termination busy state through the route signal, and transmits a response signal for the location information signal including information about the termination busy state of the mobile terminal on terminated side (busy, power down, and paging failure) and T-BUSY trigger information for processing the termination BUSY state to the O_BCSM  110  (S 130 ). The T_BUSY trigger information is detected on an O_Called_Party_Busy  123  of the T_BCSM  120 .  
           [0011]    The O_BCSM  110  received the T_BUSY trigger information translates a Select_Route PIC  112  for selecting a switch or a trunk needed to call connect, an Suth_Call_Setup PIC  113  which judges the limited range of call connection, and a Send_Call PIC  114 , and then, generates T_BCSM  120  (S 140 ). The generated T_BCSM  120  translates the call into an Auth_Term_Att PIC  121  and to a Select_Facility PIC  122 , and the Select_Facility PIC  122  detects the termination BUSY state of the mobile terminal on terminated side and the call is translated from the Select_Facility PIC  122  into the O_Called_Party_Busy  123 . The O_Called_Party_Busy  123  notifies the SCP  300  of the termination BUSY state of the termination terminal, and performs T_BUSY operation with the SCP  300  (S 150 ). And as a result of the operation, the O_BCSM  420  and T_BCSM  430  of the T_SSP  400 , and T_BCSM  120  of the O_SSP  100  are disappeared. In addition, a new T_BCSM  120  is generated in the O_SSP  100  (S 160 ). The generated T BCSM  120  in the O_SSP  100  generates an O_BCSM  100  in the O_SSP  100  (S 170 ). The generated O_BCSM  110  receives a termination switching number from the SCP  300 , and then identifies whether or not an automatic termination switching is set. If the automatic termination switching is set, the terminal attempts a call connection again. However, the automatic termination switching is not set, the terminal disconnects the call connection.  
           [0012]    [0012]FIGS. 2 and 3 are flow charts of signal processes showing intelligent network systems for processing a call in termination BUSY state of a terminal when the terminal is in termination pause state in a wired network according to the conventional art.  
           [0013]    [0013]FIG. 2 is showing an intelligent network system for processing a call in terminating BUSY state of a mobile terminal in case that the T_BCSM  120  of the O_SSP  100  performs TBUSY operation during the terminating BUSY state processing of the mobile terminal on terminated side in the wired network.  
           [0014]    As shown therein, the processes of generating the T_BCSM  120  in the o_SSP  100  and translating it to the Select_Facility PIC  122  among the processes of call processing when the mobile terminal on terminated side is in termination BUSY state are same as those in FIG. 1. However, the HLR  200  in FIG. 1 is not in termination BUSY state, but in termination pause state when the HLR  200  transmits a location information signal to the O_BCSM  110  in the O_SSP  100 . Therefore, the HLR  200  transmits a response signal to the location information signal to the O_BCSM  110  of the O_SSP  100 , and at the same time, returns a TLDN (Temporary Local Directory Number) for setting termination call.  
           [0015]    It is not detected that the mobile terminal on the terminated side is in termination BUSY state, and therefore the O_BCSM  110  of the O_SSP  100  switches the PIC from the Select Facility PIC  122  of the O_SSP  100  into the Present_Call PIC  121 , and the O_SSP  100  transmits a call setup signal to the T_SSP  400  (S 200 ). The T_SSP  400  received the call setup signal generates O_BCSM  420  in order to process the call. The generated O_BCSM  420  of the T_SSP  400  translates the call to the Auth_Term_Att PIC  421 , to a Collect_Info PIC  422 , to an Analyzed_Info PIC  423 , to a Select_Route PIC  424 , to an Auth_Call_Setup PIC  425 , and to Send_Call PIC  426  in order, and generates T_BCSM  430  (S 210 ). The generated T_BCSM  430  translates the call from an Auth_Term_Att PIC  431  to a Select_Facility PIC  432 , and detects that the mobile terminal on terminated side is in termination BUSY state presently. The Select_Facility PIC  432  which detected the termination BUSY state of the mobile terminal transmits a REDREQ to the O_SSP  100  (S 220 ). The T-BCSM  120  of the O_SSP  100  which received the REDREQ transmits a TBUSY operation performable response signal to the T_BCSM  430  of the T_SSP  400  (S 230 ), and the call is translated from the T_BCSM  120  of the O_SSP  100  to a T_Busy DP  123 . The T_Busy DP  123  notified the SCP  300  of the termination BUSY state of the mobile terminal (S 240 ), and performs TBUSY operation with the SCP  300  which received the termination BUSY state signal of the mobile terminal on terminated side. As a result of the TBUSY operation, the O_BCSM  420  and the T_BCSM  430  of the T_SSP  400  and the T_BCSM  120  of the O_SSP  100  are disappeared and the T_BCSM  120  of the O_SSP is generated (S 250 ). The generated T_BCSM  120  in the O_SSP  100  generates a new OBCSM  110  (S 260 ), and the generated O_BCSM  110  receives a termination switching number and identifies whether or not an automatic termination switch is set. If the automatic termination switch is set, the terminal attempt to call connect again. However, if the automatic termination switch is not set, the terminal disconnects the call connect.  
           [0016]    [0016]FIG. 3 is showing an intelligent network system for call processing when the terminal is in termination BUSY state in the wired network in case that the T_BCSM  120  of the O_SSP  100  can not perform TBUSY operation according to the conventional art.  
           [0017]    Processes of generating T_BCSM  120  in the O_SSP  100  and proceeding to the Select_Facility PIC  432  of the T_BCSM  430  among the steps of call processing when the mobile terminal is in termination BUSY state are same as those in FIG. 2, and therefore these are omitted in FIG. 3.  
           [0018]    When a response for the REDREQ is a failure after the Select_Facility PIC  432  transmits the REDREQ to the T_BCSM  120  in the O_SSP  1001  the call is translated from the Select_Facility PIC  432  to the T_Busy DP  431  of the T_BCSM  430  in the T_SSP  400  (S 300  and S 310 ). The T_Busy DP  431  detects the termination BUSY state of the mobile terminal on terminated side, and then the T_BCSM  430  in the T_SSP  400  notifies the SCP  300  of the termination BUSY state of the mobile terminal (S 320 ). In addition, the T_BCSM  430  performs TBUSY operation with the SCP  300  which received the termination BUSY state of the mobile terminal (S 330 ). As a result of the TBUSY operation, the O_BCSM  420  and the T_BCSM  430  in the T_SSP  400  and the T_BGSM  120  in the O_SSP  100  are disappeared, the T_BCSM  430  in the T_SSP  400  generates T_BCSM  120  of the O_SSP  100  (S 340 ) A new O_BCSM  110  is generated on the Select_Facility PIC  124  (S 350 ), and the generated O_BCSM  110  receives the termination switching number from the SCP  300  and then checks whether or not an automatic termination switch is set. If the automatic termination switch is set, the terminal attempts to call connect again. However, if the automatic termination switch is not set, the terminal disconnects the call connect.  
           [0019]    Therefore, when the terminal on the terminated side is in termination BUSY state, there should be four or more call processors (O_BCSM—T_BCSM—Trunk—O_BCSM—T_BCSM) which are generated by a mobile terminal on originated side and by the mobile terminal on finally terminated side corresponding to the BCSM for call connecting between the two. As described above, in the conventional art, the switch, the trunk resources, and the process resources in the SSP are wasted in order to process the termination BUSY state, even though the termination BUSY state is already detected, Also, the function is lowered because the call processes is complex.  
           [0020]    According to the conventional art, an unnecessary BCSM is generated and processed in order to operate the T_BUSY trigger, even though the mobile communication subscriber already detected the termination BUSY state. Therefore, the switch, trunk resources and the processor resources in the SSP are wasted in order to process the termination BUSY state of the mobile terminal on terminated side, and the function is lowered because the call processes are complex. In more detail, according to the conventional art, the call process in the termination BUSY state should be performed by generating the T_BCSM of a terminating exchanger (not shown) and the trunk resources are wasted, because the conventional art has same standard as that of a wired intelligent network.  
         SUMMARY OF THE INVENTION  
         [0021]    Therefore, an object of the present invention is to provide a method for call processing in a termination BUSY state of a termination in a radio intelligent network system for perceiving the termination BUSY state (busy, power down, and paging failure) of the terminal and termination pause state, and for reducing call processors generated in order to process above states.  
           [0022]    To achieve the object of the present invention as embodied and broadly described herein, there is provided a call processing method in a termination BUSY state of a terminal in a radio intelligent network system comprising: a step for perceiving the termination BUSY state of a terminal from a HLR (Home Location Register); a step for performing an origin BUSY (OBUSY) operation between a SCP (Service Control Point) and an origin SSP (Service Switching Point) if an origin BUSY state is detected; a step of generating an O_BCSM (Basic Call State Model) as a result of the operation; and a step of re-attempting call connect to a termination switching number which is transmitted to the generated O_BCSM.  
           [0023]    The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0024]    The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.  
         [0025]    In the drawings:  
         [0026]    [0026]FIG. 1 is a flow chart of signal process showing an intelligent network system for processing a call of a termination BUSY state when a terminal is in termination BUSY states (busy, power down, and paging failure) according to the conventional art;  
         [0027]    [0027]FIG. 2 is a flow chart of signal process showing the intelligent network system for processing a call of a termination BUSY state in case that a TBUSY operation can be performed in an O_SSP when the terminal is in a pause state according to the conventional art;  
         [0028]    [0028]FIG. 3 is a flow chart of signal process showing the intelligent network system for processing a call of a terrnination BUSY state in case that the TBUSY operation can not be performed in the O_SSP when the terminal is in the pause state according to the conventional art;  
         [0029]    [0029]FIG. 4 is a flow chart of signal process showing a radio intelligent network system for processing a call of a termination BUSY state, when a terminal is in termination BUSY states (busy, power down, and paging failure) according to the present invention;  
         [0030]    [0030]FIG. 5 is a flow chart of signal process showing the radio intelligent network system for processing a call in a termination BUSY state in case that an OBUSY operation can be performed in an O_SSP when a terminal is in a pause state according to the present invention; and  
         [0031]    [0031]FIG. 6 is a flow chart of signal process showing the radio intelligent network system for processing a call in the termination BUSY state in case that the OBUSY operation can not be performed in the O_SSP when the terminal is in the pause state according to the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0032]    Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.  
         [0033]    [0033]FIG. 4 is a flow chart of signal process showing a radio intelligent network system for processing a call in a termination BUSY state when a terminal is in termination BUSY states (busy, power down, and paging failure).  
         [0034]    Processes of perceiving an origin of mobile terminal by an Analyzed lnfo PIC  111  and translating a call to a Send_Call PIC  114  are same as those in FIG. 1, and therefore views and descriptions for that are emitted in FIG. 4. However, unlike the conventional art, an HLR (Home Location Register)  200  transmits location information carrying information for the termination BUSY state of a mobile terminal on terminated side and an O_Busy, an O_No_Page_Response, and an O_Unroutable triggers for processing the termination BUSY state to an O_BCSM  110  in an O_SSP  100 . The Send_Call PIC  114  of the O_BCSM  110  in the O_SSP  100  detects the termination BUSY state of the mobile terminal on terminated side, and the call is translated to the O_Called_Party DP  115 .  
         [0035]    The O_Called_Party DP  115  detects the triggers in order of priority, and the O_Busy, the O_No_Page_Response, and the O_Unroutable are armed on the O_Called_Party DP  115  which is one of the DPs of the O_BCSM  110  in the O_SSP  100 . The O_Busy, O_No_Page_Response, and O_Unroutable triggers have trigger detect priority on the O_Called_Party DP  115 . Especially, the OBUSY operation performed by the O_Busy trigger uses same parameter of a message and same tag value as those of the TBUSY operation for the T_Busy trigger in the conventional art, and therefore the interfaces between the other networks which are communicated with the SSP can be maintained.  
         [0036]    The O_Called Party DP  115  which detected the O_Busy trigger notifies the SCP  300  of the termination BUSY state of the mobile terminal on terminated side (S 400 ), and performs the OBUSY operation with the SCP  300  which received the termination BUSY state signal of the mobile terminal on terminated side (S 410 ). As a result of the OBUSY operation, the O_BCSM  420  and the T_BCSM  430  in the T_SSP  400  and the T_BCSM  120  in the O_SSP  100  are disappeared, and a new O_BCSM  110  is generated in the O_SSP  100 . The generated O_BCSM  120  in the O_SSP receives a termination switch number, and translates the call to a Resume_PIC  116  which sets the PIC so that the call is translated to a Collect_Info PIC or to an Analyzed_Info PIC. The Resume PIC  116  sets the Analyzed Info PIC  111 , and the O_BCSM  110  in the O_SSP  100  receives the termination switch number and then checks whether or not an automatic termination switch is set. If the automatic termination switch is set, the terminal re-attempts to call connect. However, if the automatic termination switch is not set, the terminal disconnects the call connect.  
         [0037]    As described above, the OBUSY operation is performed by the O_Busy trigger detected on the O_Called_Party DP  115 , and the termination BUSY state is processed in the O_BCSM  110 , whereby only two call processors (O_BCSM 5  T_BCSM) are generated until the terminal subscribed to the mobile communication is terminated to the termination switched number.  
         [0038]    [0038]FIGS. 5 and 6 are flow charts of signal process showing the radio intelligent network system for processing a call in the termination BUSY state in case that the mobile terminal on the terminated side is in the termination BUSY state when the terminal is in pause state according to the present invention.  
         [0039]    [0039]FIG. 5 is showing the radio intelligent network system for processing a call in the termination BUSY state of the mobile terminal on terminated side in case that the OBUSY operation can be performed in the O_SSP  100  according to the present invention.  
         [0040]    The processes of perceiving a termination pause state by the mobile terminal on terminated side and translating the call to the O_BCSM  420  in the T_SSP  400  are same as those in FIG. 2, and therefore the views and descriptions for that are omitted in FIG. 5.  
         [0041]    The PIC on the O_BCSM  420  in the T_SSP  400  is translated to a Collect_Info PIC  422 , an Analyzed_Info PIC  423 , a Select_Route PIC  424 , an Auth_Call_Setup PIC  425 , and to a Send_Call PIC  426  in order. A T_BCSM  430  in the T_SSP  400  is generated on the Send_Call PIC  426  (S 500 ). The T_BCSM  430  in the T_SSP  400  is translated from an Auth_Term_Att PIC  431  to a Select_Facility PIC  432  When the Select_Facility PIC  432  detects the termination BUSY state of the mobile terminal on the terminated side and notifies the O_BCSM  420  in the T_SSP  400 , the O_BCSM  420  in the T_SSP  400  transmits a REDREQ to the O_BCSM  110  in the O_SSP  100  (S 520 ). Then the O_BCSM  110  in the O_SSP  100  transmits a response signal for the REDREQ to the O_BCSM  420  in the T_SSP  400  (S 530 ). The O_BCSM  420  in the T_SSP  400  which received the REDREQ transmits a response signal, which presents that the OBUSY operation can be performed in the O_SSP  100 , to the O_BCSM  110  in the O_SSP  100  (S 540 ). The O_BCSM  110  in the O_SSP  100  which received the response signal translates the call from the Send_Call PIC  114  to the O_Called_Party DP  115 . The O_Called Party DP  115  detects the termination BUSY state of the mobile terminal on the terminated side, and notifies the SCP  300  (S 550 ). The O_BCSM  120  in the O_SSP  100  performs the OBUSY operation with the SCP  300  which received the termination BUSY signal of the mobile terminal on the terminated side. As a result of the operation the O_BCSM  420  and the T_BCSM  430  in the T_SSP  400  and the T_BCSM  120  in the O_SSP  100  Is are disappeared, and a new O_BCSM  110  is generated in the O_SSP  100  (S 560 ).  
         [0042]    The generated O_BCSM  110  in the O_SSP  100  receives the termination switch number (S 410 ), and translates the call to the Resume PIC  116  which sets the PIC so that the call is translated to the Collect_Info PIC or to the Analyzed_Info PIC.  
         [0043]    The Resume PIC  116  appoints the Analyzed_Info PIC  111 , and the O_BCSM  110  in the O_SSP  100  receives the termination switch number and checks whether or not an automatic termination change is set. If the automatic termination switch is set, the terminal re-attempts the call connect. However, if the automatic termination switch is not set, the terminal disconnects the call connect.  
         [0044]    [0044]FIG. 6 is showing the radio intelligent network system for processing the call in termination BUSY state in case that the OBUSY operation can not be performed in the O_SSP  100  according to the present invention.  
         [0045]    The processes of identifying the termination pause state of the mobile terminal on the terminated side when a call connect is attempted and translating the call to the Select_Facility PIC  432  of the T_BCSM  430  in the T_SSP  400  are same as those in FIG. 5, and therefore view and descriptions for that are omitted.  
         [0046]    If the O_BCSM  430  in the T_SSP  400  can not receive the REDREQ from the O_BCSM  110  in the O_SSP  100 , the O_BCSM  430  transmits a signal which presents that the OBUSY operation can not be performed to the O_BCSM  110  in the O_SSP  100 , and then the call is translated to a T_Busy DP  433  in the T_SSP.  
         [0047]    The T_Busy DP  433  notifies the HLR  300  of the termination BUSY state of the mobile terminal on terminated side (S 600 ), and performs the OBUSY operation with the HLR  300  which received the termination BUSY signal of the termination mobile terminal (S 610 ). Consequently, the O_BCSM  420  and the T_BCSM  430  in the T_SSP  400  and the T_BCSM  120  in the O_SSP  100  are disappeared, and a new O_BCSM  110  is generated in the O_SSP  100  (S 620  and S 630 ). The generated O_BCSM  110  in the O_SSP  100  receives the termination switch number (S 410 ), and the call is translated to the Resume PIC  116  which appoints the PIC so that the call is translated to the Collect_Information PIC or to the Analyzed_Info PIC. The Resume PIC  116  appoints the Analyzed_Info PIC  111 , and the O_BCSM  120  in the O_SSP  100  receives the termination switch number, and after that checks whether or not an automatic termination switch is set. If the automatic termination switch is set, the terminal re-attempts the call connect. However, if the automatic termination switch is not set, the terminal disconnects the call connect.  
         [0048]    The present invention releases the resources of the trunk and terminating exchanger (not shown) so that the initial originating BCSM processes the termination BUSY state by the characteristics of the mobile network which detects the termination BUSY state by receiving the REDREQ.  
         [0049]    As described above, when the T_Busy DP detects the termination BUSY states (busy, power down, and paging failure) and the termination pause state in the radio intelligent network system, the radio intelligent network system reduces the call processor which are generated in order to process the termination BUSY states (busy, power down, and paging failure) and the termination pause state, whereby the resources such as processors, switches, and trunk in the SSP is not wasted and the call processes can be reduced.  
         [0050]    Also, impacts on call processes can be prevented in case that a conventional non-intelligent network is changed into the intelligent network.  
         [0051]    As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.