Abstract:
A method for processing a synchronous message in an asynchronous mobile communication system including an asynchronous mobile station and an asynchronous radio network, comprises the steps of: when a synchronous core network is interlocked with the asynchronous radio network, generating a system information block based on a header information provided from the synchronous core network; formatting the generated information block into a system information message; and transmitting the system information message to the asynchronous mobile station via a channel.

Description:
FIELD OF THE INVENTION 
   This invention relates to a method for processing a synchronous message in an asynchronous mobile communication system; and, more particularly, to a method for processing a synchronous message in an asynchronous mobile communication system when a synchronous core network is interlocked with an asynchronous radio network of the asynchronous mobile communication system. 
   DESCRIPTION OF THE PRIOR ART 
   In a conventional asynchronous mobile communication system, an asynchronous mobile station is connected to an asynchronous radio (for example, a universal mobile telecommunication system (UMTS) terrestrial radio access (UTRAN)), and a global system for mobile communications-mobile application part (GSM-MAP) network is connected to a core network. 
     FIG. 1  shows core network interface architectures of the conventional synchronous/asynchronous mobile communication system as mentioned above. 
     FIG. 1A  shows the core network interface architecture of the conventional synchronous mobile communication system. In this drawing, the reference numeral  11  denotes a synchronous mobile station,  12  denotes a synchronous radio network (i.e., a code division multiple access-2000 (CDMA-2000) radio network) which performs a data interfacing operation with the synchronous mobile station  11  and includes a synchronous base transceiver station/base station controller (BTS/BSC), and  13  denotes a synchronous core network which is connected to the synchronous radio network  12  and includes a synchronous mobile services switching center (MSC). 
   In the above core network interface architecture of the conventional synchronous mobile communication system, the synchronous mobile station  11  can be connected to only the synchronous radio network  12  as well known to one skilled in the art, which is in turn connected to the synchronous core network  13 , thereby allowing the synchronous mobile station  11  to be interfaced with only the synchronous core network  13 . 
     FIG. 1B  shows the core network interface architecture of the conventional asynchronous mobile communication system. In this drawing, the reference numeral  21  denotes an asynchronous mobile station,  22  denotes an asynchronous radio network (i.e., a UTRAN) which includes a Node B, which is similar to the base transceiver station (BTS), and a radio network controller (RNC), and  23  denotes an asynchronous core network which includes an asynchronous mobile services switching center (MSC) connected to the UTRAN  22 . 
   In the above core network interface architecture of the conventional asynchronous mobile communication system, the asynchronous mobile station  21  is connected to the asynchronous radio network  22  (i.e., UTRAN) which is in turn connected to the asynchronous core network  23 , thereby allowing the asynchronous mobile station  21  to perform a data interfacing operation with the asynchronous core network  23 . 
     FIG. 2  shows layered protocol structures of the conventional synchronous/asynchronous mobile communication system as mentioned above. 
     FIG. 2A  shows the layered protocol structure of the conventional synchronous mobile communication system. In this drawing, the reference numeral  30  denotes a synchronous mobile station,  40  a synchronous radio network and  50  a synchronous core network connected to the synchronous radio network  40 . 
   The synchronous mobile station  30  comprises a layer  3   31 , a layer  2   35  and a layer  1   36 . The layer  3   31  includes a synchronous call control (CC) entity  32  for management of a call and a synchronous mobility management (MM) entity  33  for management of a mobility. 
   The layer  3   31  is a network layer which includes following sub layers, a synchronous radio resource (RR) sub layer, a synchronous call control (CC) entity  32  and a mobility management (MM) entity  33 . In synchronous system, the synchronous RR sub layer is not apparently separated from the others in the layer  3   31 . 
   The RR sub layer offers data transfer services on primitive to a lower layer (RLC sub layer) and handles a control plane signaling of the layer  3   31  between a mobile station (MS) and a synchronous radio network. The RR sub layer manages a radio resource. Also, the RR sub layer assigns/reconfigures/releases the radio resource to UE/UTRAN. 
   The CC entity handles a call control signaling of layer  3  between the MSs and the synchronous radio network. 
   The MM entity handles a mobility management signaling of layer  3  between the MSs and the synchronous radio network. 
   The layers  3  to  1   31 ,  35  and  36  in the synchronous mobile station  30  communicate with corresponding layers  41 ,  45  and  46  in the synchronous radio network  40 . 
   The synchronous radio network  40  comprises a layer  3   41 , a layer  2   45  and a layer  1   46 . The layers  3  to  1  in the synchronous radio network  40  correspond respectively to those in the synchronous mobile station  30 . 
   The layers  3  to  1   41 ,  45  and  46  in the synchronous radio network  40  communicate with corresponding layers  31 ,  35 ,  36 ,  51 ,  55  and  56  in the synchronous mobile station and the synchronous core network  50 . 
   The synchronous core network  50  comprises a layer  3   51 , a layer  2   55  and a layer  1   56 . The layers  3  to  1  in the synchronous radio network  50  correspond respectively to those in the synchronous mobile station  30 . 
   The layers  3  to  1   51 ,  55  and  56  in the synchronous core network  50  communicate with corresponding layers  41 ,  45  and  46  in the synchronous radio network  40 . 
   In the conventional synchronous mobile station and radio network as the layered protocol structure, the synchronous mobile station  30  receives a Sync channel message from the synchronous radio network  40  over a Sync channel and acquires information necessary to its connection to the synchronous core network  50 , including information related to the synchronous core network  50  and information about the synchronous radio network  40 , from the received Sync channel message. 
   In other words, for interfacing with the synchronous ANSI-41 network via the synchronous radio network, the synchronous mobile station acquires system information (i.e., information related to the radio network and core network) through a system determination sub-state, a pilot channel acquisition sub-state, a Sync channel acquisition sub-state and a synchronization sub-state after it is powered on. 
     FIG. 5  shows a procedure of state transitions of a synchronous mobile station in the conventional synchronous mobile communication system.  FIG. 2B  is shows the layered protocol structure of the conventional asynchronous mobile communication system. In this drawing, the reference numeral  60  denotes an asynchronous mobile station,  70  a UTRAN and  80  an asynchronous core network. 
   The asynchronous mobile station  60  comprises a layer  3   61 , a layer  2   65  and a layer  1   66 . In particular, the layer  3   61  includes a non-access stratum (NAS) part and an access stratum (AS) part. The NAS part includes an asynchronous call control (CC) part  62  for management of a call and an asynchronous mobility management (MM) part  63  for management of a mobility. The AS part includes an asynchronous radio resource control (RRC) part  64 . In the asynchronous system, the asynchronous RRC sub layer is apparently separated from the NAS part. Functions of the asynchronous RRC sub layer are the same as those of the synchronous RR sub layer. 
   The UTRAN  70  comprises a layer  3   71 , a layer  2   73  and a layer  1   74 . The layer  3   71  of the UTRAN  70  has no NAS part having asynchronous CC part and asynchronous MM part. The layers  3  to  1  of the UTRAN  70  are connected and correspond respectively to those in the asynchronous mobile station  60  and those in the asynchronous core network  80 . However, since the UTRAN  70  does not have the NAS part, i.e., the asynchronous CC part and the asynchronous MM part, the NAS parts of the asynchronous mobile station  60  and the asynchronous core network  80  are not coupled to each other through the UTRAN  70 . 
   The asynchronous core network  80  comprises a layer  3  having a NAS part  81  connected to that of the asynchronous mobile station  60  and a AS part, a layer  2   85  and a layer  1   86  connected respectively to those in the UTRAN  70 . The NAS part comprises an asynchronous CC part  82  for management of a call and an asynchronous MM part  83  for management of a mobility. 
   Functions of the layer  3  to  1  of the asynchronous system are similar with those of the synchronous system except for an operating type. Therefore, detailed description of the layer  3  to  1  will be skipped. 
   The more detailed descriptions about layered protocol structures are well taught in 3 rd  Generation Partnership Project (3GPP), Technical Specification Group (TSG)—Radio Access Network (RAN): 3G TS25.301 (Radio Interface Protocol Architecture), 3G TS25.302 (Services provided by the physical layer), 3G TS25.321 (MAC Protocol Specification), 3G TS25.322 (RLC Protocol Specification) and 3G TS25.331 (RRC Protocol Specification) in detail. 
   In the conventional asynchronous mobile station and radio network having the layered protocol structure, the asynchronous mobile station  60  receives a system information message from the UTRAN  70  over a broadcast control channel (BCCH) and acquires information necessary to its connection to the asynchronous core network  80 , including information related to the asynchronous core network  80  and information about the UTRAN  70 , from the received system information message. 
   In the next-generation mobile telecommunication system such as the IMT-2000 system, either the GSM-MAP network used in the above conventional asynchronous mobile communication system or the ANSI-41 network used in the above conventional synchronous mobile communication system should be employed as a core network in order to perform an international roaming in a synchronous or asynchronous mobile communication system of an IMT-2000 system. 
   According to network deployment scenarios, the asynchronous IMT-2000 system can have the following two inter face architectures; first: asynchronous mobile station—asynchronous radio network—synchronous ANSI-41 network, second: asynchronous mobile station—asynchronous radio network—asynchronous GSM-MAP network. 
     FIG. 3  shows core network interface architectures of the next-generation mobile communication system such as the asynchronous IMT-2000 system. 
     FIG. 3A  shows an asynchronous GSM-MAP core network interface architecture of a hybrid type asynchronous radio network. In this drawing, the reference numeral  210  denotes a hybrid type asynchronous mobile station,  220  denotes a hybrid type UTRAN which is a hybrid type asynchronous radio network, and  230  denotes an asynchronous core network which is connected to the hybrid type UTRAN  220  and includes an asynchronous MSC. 
     FIG. 3B  shows a synchronous ANSI-41 core network interface architecture of the hybrid type asynchronous radio network. In this drawing, the reference numeral  210  denotes a hybrid type asynchronous mobile station,  220  denotes a hybrid type UTRAN which is a hybrid type asynchronous radio network, and  240  denotes a synchronous core network which is connected to the hybrid type UTRAN  220  and includes a synchronous MSC. 
   In order to be operable adaptively to the above two interface architectures, the hybrid type asynchronous mobile stations in the next-generation asynchronous mobile communication system has both asynchronous CC and MM protocol entities serving for the GSM-MAP core network and synchronous CC and MM protocol entities serving for the ANSI-41 core network at the layer  3  in the protocol stack structure, which is a different from each of the conventional asynchronous mobile stations. 
     FIG. 4  shows layered protocol structures of the next-generation asynchronous mobile communication system. 
     FIG. 4A  shows layered protocol structures of a hybrid type asynchronous mobile station, a hybrid type asynchronous radio network and a synchronous ANSI-41 core network. In this drawing, the reference numeral  210  denotes a hybrid type asynchronous mobile station,  220  denotes a hybrid type UTRAN which is a hybrid type asynchronous radio network, and  230  denotes an ANSI-41 core network connected to the hybrid type UTRAN  220 . 
   The hybrid type asynchronous mobile station  210  comprises a layer  3   211 , a layer  2   217  and a layer  1   218 . The layer  1  includes a synchronous CC part  212 , a synchronous MM part  213 , an asynchronous CC part  214 , an asynchronous MM part  215  and asynchronous RRC part  216  and selectively activates a synchronous CC/MM protocol or an asynchronous CC/MM protocol. 
   For example, if the hybrid type asynchronous mobile station  210  is currently connected to the ANSI-41 core network  230 , the layer  3  therein activates a protocol between the synchronous CC part  212  and synchronous MM part  213  to perform a message interfacing operation with the ANSI-41 core network  230 . 
     FIG. 4B  shows layered protocol structures of a hybrid type asynchronous mobile station, a hybrid type asynchronous radio network and an asynchronous GSM-MAP core network. In this drawing, the reference numeral  210  denotes a hybrid type asynchronous mobile station,  220  denotes hybrid type a UTRAN which is a hybrid type asynchronous radio network, and  240  denotes an asynchronous GSM-MAP core network connected to the hybrid type UTRAN  220 . 
   The hybrid type asynchronous mobile station  210  comprises a layer  3   211  having a NAS part and an AS part, a layer  2   217  and a layer  1   218 . The NAS part includes a synchronous CC part  212 , a synchronous MM part  213 , an asynchronous CC part  214  and an asynchronous MM part  215  and selectively activates a synchronous CC/MM protocol or an asynchronous CC/MM protocol. The AS part includes an asynchronous RRC part  216 . 
   The hybrid type asynchronous radio network  220  comprises a layer  3   221  having a NAS part and an AS part, a layer  2   225  and a layer  1   226 , which activate their protocols corresponding respectively to those in the hybrid type asynchronous mobile station  210  and those in the GSM-MAP core network  240  to transmit and receive messages. 
   The GSM-MAP core network  240  comprises a layer  3   241  having a NAS part and an AS part, a layer  2   245  and a layer  1   246 . The NAS part includes an asynchronous CC part  242  and an asynchronous MM part  243 . The AS part includes an asynchronous RRC part  244 . 
   For example, if the hybrid type asynchronous mobile station  210  is currently connected to the GSM-MAP core network  240 , the NAS part therein activates protocols of the asynchronous CC part  214  and asynchronous MM part  215  to perform a message interfacing operation with the GSM-MAP core network  240 . 
   The layers  3  to  1  of the hybrid type asynchronous radio network  220  are connected and correspond respectively to those in the hybrid type synchronous mobile station  210  and those in the asynchronous core network  240 . However, the NAS parts of the hybrid type asynchronous mobile station  210  and the asynchronous core network  240  are not coupled to each other through the hybrid type asynchronous mobile station  220 . 
   At the synchronous mobile station in the synchronous mobile communication system, an overhead message is received via a paging channel and types of the overhead message are as follows:
         1) system parameters message;   2) access parameters message;   3) neighbor list message;   4) CDMA channel list message;   5) extended system parameters message;   6) extended neighbor list message;   7) global service redirection message;   8) general neighbor list message;   9) user zone identification message;   10) private neighbor list message;   11) extended global service redirection message; and   12) extended CDMA channel list message.       

   The above overhead messages are transmitted to the synchronous mobile station periodically and provide following information:
         a) detailed information of a system (a location of the system, an identifier of the system, an operation frequency of the system and handoff operation information);   b) detailed information of neighboring systems;   c) channel information used in a current system;   d) information about a registration area of the synchronous mobile station;   e) information about a user zone for a tiered service; and   f) information necessary for the synchronous mobile station to access the system.       

   The above information from the overhead message that is transmitted to the synchronous mobile station, is stored at the CC and MM protocol entities. The stored information is used as a reference when the synchronous mobile station transmits a message related to a call control and a mobility management to the system. 
   The messages among the above overhead messages which should be essentially transmitted to and then stored in the CC/MM protocol entities of the synchronous mobile station are as follows:
         1) user zone identification message;   2) private neighbor list message;   3) system parameter message;   4) extended system parameters message;   5) global service redirection message; and   6) extended global service redirection message.       

   The user zone identification message among the above overhead messages is used for the tiered service. The tiered service means that a service requested by the synchronous mobile station or a special service is provided to the synchronous mobile station, based on a location of the synchronous mobile station. A concept of the user zone is necessary for the tiered service. 
   The user zone identification message provides following information related to the user zone:
         i) a number of the user zones covered by the system;   ii) IDs of each user zone covered by the system;   iii) a user zone update revision number held by the system; and   iv) a parameter used for getting out of the user zone.       

   Information contained in the user zone identification message is shown in  FIG. 6 . 
   The private neighbor list message among the overhead messages provides the tiered service to the neighbor list of the current system and information about neighboring systems which the synchronous mobile station does not register in the user zone but affords to provide the tiered service. 
   The private neighbor list message provides following information:
         i) a number of the neighboring systems that the tiered service is provided to;   ii) system identification (SID) information and network identification (NID) information of the neighboring systems that the tiered service is provided to;   iii) band class information and frequency information of the neighboring systems that the tiered service is provided to; and   iv) user zone information of the neighboring systems that the tiered service is provided to.       

   The synchronous mobile station can be provided with the tiered service by performing a registering from the user zone of the current system to the user zone of the neighbor system, based on the private neighbor list message. 
   Information elements contained in the private neighbor list message are shown in  FIG. 7 . 
   The system parameters message among the above overhead messages provides to the synchronous mobile station detailed information, that is, information about the NID and the SID of the system, an antenna angle of the system, a system identifier, an operation frequency of the system and a handoff operation or the like. Also, the system parameters message informs whether an extended system parameters message, an extended neighbor list message, a neighbor list message, a user zone identification message, an extended CDMA channel list message and an extended global service redirection message among the overhead messages are transmitted or not. 
   Information elements contained in the system parameters message are shown in  FIG. 8 . 
   The extended global service redirection message among the above overhead message provides information of another system having an operation mode and the band class not equal to those of the current system, to the synchronous mobile station, so that the synchronous mobile station can select another system and then be operated. 
   The extended global service redirection message provides following information:
         i) a configuration message sequence number related to a global service redirection;   ii) access overload class information used in a new system;   iii) the NID, the SID, the band class and the CDMA channel information of the new system;   iv) a maximum protocol revision number of the synchronous mobile station necessary for redirecting the service based on the extended global service redirection message; and   v) a minimum protocol revision number of the synchronous mobile station necessary for redirecting the service based on the extended global service redirection message.       

   Information elements contained in the extended global service redirection message are shown in  FIG. 9 . 
   The global service redirection message among the above overhead messages provides information of another system having an operation mode and the band class not equal to those of the current system, to the synchronous mobile station, so that the synchronous mobile station can select another system and then be operated. 
   The global service redirection message provides following information:
         i) a configuration message sequence number related to a global service redirection;   ii) access overload class information used in a new system;   iii) service redirection type information; and   iv) the NID, the SID, the band class and the CDMA channel information of the new system.       

   Information elements contained in the global service redirection message are shown in  FIG. 11 . 
   A utility of the above global service redirection message is different from that of the extended global service redirection message. The global service redirection message provides a service of the service redirection to the synchronous mobile station having a protocol revision number lower than six. On the contrary, the extended global service redirection message provides a service of the service redirection to the synchronous mobile station having the protocol revision number equal to or higher than 6. 
   The extended system parameters message among the above overhead message provides identification information by which the synchronous mobile station is discriminated in the system, based on an IMSI or a TMSI. 
   The extended system parameters message provides following information:
         i) a mobile station identification type;   ii) the TMSI and the IMSI information that are used by the mobile station;   iii) protocol revision information of the CC and the MM protocol entities between the mobile station and the system;   iv) a packet data service zone identifier used upon a transmission of the packet data;   v) additive service information that can be requested by the mobile station; and   vi) information related to an access handoff.       

   Information elements contained in the extended system parameters message are shown in  FIG. 10 . 
   If there is not provided the extended system parameters message, the system cannot identify the mobile station and provide a service requested by the mobile station. 
   A difference between the extended system parameters message and the system parameters message is as follows. 
   The system parameters message serves to control detailed information about the system, that is, information about a location of the system, an operation frequency of the system, a system identifier, a handoff operation or the like and the overhead message. On the contrary, the extended system parameters message serves to provide information by which the mobile station communicating with the system is discriminated and information about types of service which the system can provide additionally, so that the CC and the MM protocol entities can perform a call control and a mobility management well, respectively. 
   However, because there are not the messages described above, that is, the user zone identification message, the private neighbor list message, the system parameters message, the extended system parameters message, the global service redirection message and the extended global service redirection message in the asynchronous mobile communication system, there is caused a problem that the synchronous CC and MM protocol entities of the asynchronous mobile station can&#39;t perform normal functions of the call control, the mobility management or the like. 
   The asynchronous radio network transmits a system information message to the asynchronous mobile station, and to thereby provide information that is used at the CC and MM protocol entities of the asynchronous mobile station and other information. Information contained in the system information message is as follows:
         1) information related to the core network;   2) information related to a cell selection and a cell reselection;   3) information related to an asynchronous radio resource; and   4) information related to an asynchronous radio link measurement.       

   The above information is included in a system information block and transmitted to the asynchronous mobile station. The system information block (SIB) is generated, based on criteria of an area scope, a modification frequency and a user equipment (UE) mode. 
   After receiving the system information message including the SIB generated by using the criteria at the asynchronous mobile station, a plurality of information related to the radio resource is stored and used at a radio resource control (RRC) protocol entity of the asynchronous mobile station and other information is stored and used at the CC and MM protocol entities of the asynchronous mobile station, so that the asynchronous mobile station can perform functions of the call control and the mobility management well. 
   In case the asynchronous radio network is interlocked with the synchronous ANSI-41 core network, an asynchronous radio resource is used as a resource and an asynchronous message is exchanged between the asynchronous radio network and the asynchronous mobile station. On the other hand, the synchronous CC and MM protocol entities of the asynchronous mobile station are operated. 
   In this case, information fields related to a type of the core network among synchronous messages should be received by the asynchronous mobile station so that the synchronous CC and MM protocol entities of the asynchronous mobile station can be operated normally. 
   To generate the SIB including the information fields, the three criteria of the area scope, the modification frequency and the UE mode described above need to be used. However, this 3 criteria are taken into consideration just for the case where the SIB is generated in the asynchronous mobile communication system, when the asynchronous radio network is interlocked with the asynchronous GSM-MAP core network. 
   Accordingly, there is caused a problem that it is impossible for the asynchronous mobile station to interlocked with the synchronous core network, because the asynchronous radio network doesn&#39;t have information related to the type of the core network upon interlocking with the synchronous ANSI-41 core network. 
   SUMMARY OF THE INVENTION 
   It is an object of the present invention to provide a method for processing a synchronous message in an asynchronous mobile communication system including an asynchronous mobile station and an asynchronous radio network, in case an asynchronous core network or a synchronous core network is interlocked with the asynchronous radio network. 
   It is another object of the present invention to provide a method for generating a system information block in an asynchronous mobile communication system including an asynchronous mobile station and an asynchronous radio network, in case an asynchronous core network or a synchronous core network is interlocked with the asynchronous radio network. 
   In accordance with an aspect of the present invention, there is provided a method for processing a synchronous message in an asynchronous mobile communication system including an asynchronous mobile station and an asynchronous radio network, the method comprising the steps of: a) when a synchronous core network is interlocked with the asynchronous radio network, generating a system information block, based on a header information provided from the synchronous core network; b) formatting the generated information block into a system information message; and c) transmitting the system information message to the asynchronous mobile station via a channel. 
   In accordance with another aspect of the present invention, there is provided a method for generating a system information block in an asynchronous mobile communication system including an asynchronous mobile station and an asynchronous radio network, wherein a core network is interlocked, the method comprising the steps of: determining a type of the core network; combining information fields for generating the system information block; determining the type of the core network related to the combined information fields; and establishing an effective area, an update cycle and a user equipment (UE) mode. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other objects and aspects of the invention will become apparent from the following description of the embodiments with reference to the accompanying Drawings, in which: 
       FIG. 1A  is a pictorial representation illustrating a conventional structure of a synchronous mobile communication system interlocking with a synchronous core network; 
       FIG. 1B  is a pictorial representation of conventional structuring of an asynchronous mobile communication system interlocking with an asynchronous core network; 
       FIG. 2A  is a diagram representing protocol structures of each section in the synchronous mobile communication system; 
       FIG. 2B  is a diagram representing protocol structures of each section in the asynchronous mobile communication system; 
       FIG. 3A  is a pictorial representation of structure of interlocking with an asynchronous GSM-MAP core network in an asynchronous mobile communication system; 
       FIG. 3B  is a pictorial representation of structure of interlocking with a synchronous ANSI-41 core network in an asynchronous mobile communication system; 
       FIG. 4A  is a schematic diagram representing protocol layers structure in the asynchronous mobile communication system interlocking with a synchronous ANSI-41 core network; 
       FIG. 4B  is a schematic diagram representing protocol layers structure in the asynchronous mobile communication system interlocking with an asynchronous GSM-MAP core network; 
       FIG. 5  is a flowchart illustrating state transitions of a synchronous mobile station in the conventional synchronous mobile communication system; 
       FIG. 6  is a table illustrating a configuration of a user zone identification message used in a conventional synchronous mobile communication system; 
       FIG. 7  is a table illustrating a configuration of a system parameters message used in a conventional synchronous mobile communication system; 
       FIG. 8  is a table illustrating a configuration of a system parameters message used in a conventional synchronous mobile communication system; 
       FIG. 9  is a table illustrating a configuration of a system parameters message used in a conventional synchronous mobile communication system; 
       FIG. 10  is a table illustrating a configuration of an extended global service redirection message used in a conventional synchronous mobile communication system; 
       FIG. 11  is a table illustrating a configuration of a global service redirection message used in a conventional synchronous mobile communication system; 
       FIG. 12  is a table showing that a user zone identification message is classified into information related to a radio resource and information unrelated to the radio resource in accordance with the present invention; 
       FIG. 13  is a table illustrating a configuration of a system information block, for example, a user zone identification message, which is formatted in a system information message transmitted to the an asynchronous mobile station via a broad cast control channel (BCCH) in accordance with the present invention; 
       FIG. 14  is a flow chart illustrating a method for processing a synchronous message in an asynchronous mobile communication system including an asynchronous mobile station and an asynchronous radio network, wherein a synchronous core network is interlocked in accordance with the present invention; 
       FIG. 15  is a flow chart illustrating a first embodiment of a method for processing a synchronous message at an asynchronous mobile station which receives a system information block containing the synchronous message in accordance with the present invention; 
       FIG. 16  is a table showing that a private neighbor list message is classified into information related to a radio resource and information unrelated to the radio resource in accordance with the present invention; 
       FIG. 17  is a table illustrating a configuration of a system information block, for example, a private neighbor list message, which is formatted in a system information message transmitted to the an asynchronous mobile station via a broad cast control channel (BCCH) in accordance with the present invention; 
       FIG. 18  is a flow chart illustrating a second embodiment of a method for processing a synchronous message at an asynchronous mobile station which receives a system information block containing the synchronous message in accordance with the present invention; 
       FIG. 19  is a table showing that a system parameters message is classified into information related to a radio resource and information unrelated to the radio resource in accordance with the present invention; 
       FIG. 20  is a table illustrating a configuration of a system information block, for example, a system parameters message, which is formatted in a system information message transmitted to the an asynchronous mobile station via a broad cast control channel (BCCH) in accordance with the present invention; 
       FIG. 21  is a flow chart illustrating a third embodiment of a method for processing a synchronous message at an asynchronous mobile station which receives a system information block containing the synchronous message in accordance with the present invention; 
       FIG. 22  is a table showing that an extended global service redirection message is classified into information related to a radio resource and information unrelated to the radio resource in accordance with the present invention; 
       FIG. 23  is a table illustrating a configuration of a system information block, for example, an extended global service redirection message, which is formatted in a system information message transmitted to the an asynchronous mobile station via a broad cast control channel (BCCH) in accordance with the present invention; 
       FIG. 24  is a flow chart illustrating a fourth embodiment of a method for processing a synchronous message at an asynchronous mobile station which receives a system information block containing the synchronous message in accordance with the present invention; 
       FIG. 25  is a table showing that an extended system parameters message is classified into information related to a radio resource and information unrelated to the radio resource in accordance with the present invention; 
       FIG. 26  is a table illustrating a configuration of a system information block, for example, an extended system parameters message, which is formatted in a system information message transmitted to the an asynchronous mobile station via a broad cast control channel (BCCH) in accordance with the present invention; 
       FIG. 27  is a flow chart illustrating a fifth embodiment of a method for processing a synchronous message at an asynchronous mobile station which receives a system information block containing the synchronous message in accordance with the present invention; 
       FIG. 28  is a table showing that a global service redirection message is classified into information related to a radio resource and information unrelated to the radio resource in accordance with the present invention; 
       FIG. 29  is a table illustrating a configuration of a system information block, for example, a global service redirection message, which is formatted in a system information message transmitted to the an asynchronous mobile station via a broad cast control channel (BCCH) in accordance with the present invention; 
       FIG. 30  is a flow chart illustrating a sixth embodiment of a method for processing a synchronous message at an asynchronous mobile station which receives a system information block containing the synchronous message in accordance with the present invention; and 
       FIG. 31  is a flow chart illustrating a method for generating a new type of a system information block corresponding to a type of an interlocked core network in accordance with the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Embodiment 1 
   As shown in  FIG. 4 , in case where international mobile telecommunication-2000 (IMT-2000) system has an interlocking structure which includes an asynchronous mobile station, an asynchronous radio network and a synchronous ANSI-41 core network, a synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station are activated. In this case, information related to a radio resource is represented asynchronous. All messages which are exchanged between the asynchronous mobile station and the asynchronous radio network, are represented asynchronous. On the contrary, information unrelated to the radio resource is represented synchronous for the synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station. 
   Referring to  FIG. 12 , information elements of a user zone identification message are classified into information elements related to the radio resource and information elements unrelated to the radio resource, in order to select and transmit to the asynchronous mobile station, the information elements unrelated to the radio resource from the information elements of a user zone identification message that is included in an overhead message of a synchronous system. 
   As shown in  FIG. 12 , information elements corresponding to a NON-RRC are not related to the radio resource, and thus, as shown in  FIG. 12 , no information elements related to the radio resource are included in the information elements of a user zone identification message. 
   In accordance with the present invention, referring to  FIG. 13 , a new type of system information block is represented, in order to transmit to the asynchronous mobile station, the classified information elements unrelated to the radio resource by using a system information message that is transmitted via a broadcast control channel (BCCH). 
   The new type of system information block is substituted for another system information block that is formatted in a predetermined position of the system information message, and is transmitted to the asynchronous mobile station irrespective of which state the asynchronous mobile station is in, an idle mode or a connected mode. 
   In  FIG. 13 , a &lt;maxSysInfoBlockcount&gt; recorded in a Range Bound refers to a maximum number that is a criterion of other system information blocks. 
   In case the synchronous ANSI-41 core network is interlocked with the asynchronous radio network as shown in  FIG. 4 , the asynchronous radio network transmits a synchronous message to the asynchronous mobile station according to a procedure shown in  FIG. 14  in accordance with the present invention for synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station. 
   At step S 101 , an asynchronous radio network determines if a ANSI-41 core network is interlocked, and if not, a logic flow proceeds to step S 102  where the asynchronous radio network transmits a system information message to an asynchronous mobile station via a broadcast control channel (BCCH), otherwise the logic flow proceeds to step S 103  where the asynchronous radio network generates a new system information block, contents of which are varied with information to be transmitted. 
   At step S 104 , the new system information block is formatted in the system information message. 
   At step S 105 , the system information message is transmitted to the asynchronous mobile station. 
   The asynchronous mobile station shown in  FIG. 4  receives the system information message transmitted from the asynchronous radio network at the synchronous call control (CC) and mobility management (MM) protocol entities of the asynchronous mobile station, selects out a user zone identification message that is recorded in the new system information block of the system information message and performs an operation corresponding to the selected user zone identification message. 
     FIG. 15  shows a procedure where an asynchronous mobile station receives and processes a user zone identification message included in an overhead message that is used in a synchronous system, based on a system information message that is used in an asynchronous system. 
   At step S 111 , the asynchronous mobile station receives a master system information block transmitted from an asynchronous radio network via a broadcast control channel (BCCH). 
   At step S 112 , the asynchronous mobile station determines if a public land mobile network identity (PLMN ID) among information elements that are contained in the master system information block, is equal to a PLMN ID stored in the asynchronous mobile station, and if not, after the master system information block is cleared, the logic flow returns to the step S 111 , otherwise the logic flow proceeds to step S 113 . 
   At step the S 113 , the asynchronous mobile station determines if a type of a core network is a global system for mobile communications-mobile application part (GSM-MAP), and if not, the logic flow proceeds to step S 120 , otherwise proceeds to step S 114  where information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 115 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 116 , the asynchronous mobile station receives the system information message. 
   At step S 117 , a system information block is selected from the received system information message. 
   At step S 118 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 116 , otherwise the logic flow proceeds to step S 119 . 
   At the step S 119 , information related to the radio resource is stored in the RRC protocol and information unrelated to the radio resource is stored in the asynchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 120 , information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 121 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 122 , the asynchronous mobile station receives the system information message. 
   At step S 123 , a system information block is selected from the received system information message. 
   At step S 124 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 122 , otherwise the logic flow proceeds to step S 125 . 
   At the step S 125 , the asynchronous mobile station determines if the selected system information block is related to a synchronous user zone identification message (UZIM), and if not, the logic flow proceeds to step S 127 , otherwise proceeds to step S 126  where all information elements contained in the selected system information block are stored in the synchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 127 , information related to the radio resource is stored in the RRC protocol entity. Then, the asynchronous mobile station awaits a next system information message. 
   Embodiment 2 
   As shown in  FIG. 4 , in case an international mobile telecommunication-2000 (IMT-2000) system has an interlocking structure which includes an asynchronous mobile station, an asynchronous radio network and a synchronous ANSI-41 core network, a synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station are activated. In this case, information related to a radio resource is represented asynchronous. All messages which are exchanged between the asynchronous mobile station and the asynchronous radio network, are represented asynchronous. On the contrary, information unrelated to the radio resource is represented synchronous for the synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station. 
   Referring to  FIG. 16 , information elements of a private neighbor list message are classified into information elements related to the radio resource and information elements unrelated to the radio resource, in order to select and transmit to the asynchronous mobile station, the information elements unrelated to the radio resource from the information elements of the private neighbor list message that is included in an overhead message of a synchronous system. 
   As shown in  FIG. 16 , information elements corresponding to a NON-RRC are not related to the radio resource and information elements corresponding to a RRC are related to the radio resource. 
   In accordance with the present invention, referring to  FIG. 17 , a new type of system information block is represented, in order to transmit to the asynchronous mobile station, the classified information elements unrelated to the radio resource by using a system information message that is transmitted via a broadcast control channel (BCCH). 
   The new type of system information block is substituted for another system information block that is formatted in a predetermined position of the system information message, and is transmitted to the asynchronous mobile station irrespective of which state the asynchronous mobile station is in, an idle mode or a connected mode. 
   In  FIG. 17 , a &lt;maxSysInfoBlockcount&gt; recorded in a Range Bound refers to a maximum number that is a criterion of other system information blocks. 
   In case the synchronous ANSI-41 core network is interlocked with the asynchronous radio network as shown in  FIG. 4 , the asynchronous radio network transmits a synchronous message to the asynchronous mobile station according to a procedure shown in  FIG. 14  in accordance with the present invention for the synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station. 
   At step S 101 , an asynchronous radio network determines if a ANSI-41 core network is interlocked, and if not, a logic flow proceeds to step S 102  where the asynchronous radio network transmits a system information message to an asynchronous mobile station via a broadcast control channel (BCCH), otherwise the logic flow proceeds to step S 103  where the asynchronous radio network generates a new system information block, contents of which are varied with information to be transmitted. 
   At step S 104 , the new system information block is formatted in the system information message. 
   At step S 105 , the system information message is transmitted to the asynchronous mobile station. 
   The asynchronous mobile station shown in  FIG. 4  receives the system information message transmitted from the asynchronous radio network at the synchronous call control (CC) and mobility management (MM) protocol entities of the asynchronous mobile station, selects out a private neighbor list message that is recorded in the new system information block of the system information message and performs an operation corresponding to the selected private neighbor list message. 
     FIG. 18  shows a procedure where an asynchronous mobile station receives and processes a private neighbor list message included in an overhead message that is used in a synchronous system, based on a system information message that is used in an asynchronous system. 
   At step S 211 , the asynchronous mobile station receives a master system information block transmitted from an asynchronous radio network via a broadcast control channel (BCCH). 
   At step S 212 , the asynchronous mobile station determines if a public land mobile network identity (PLMN ID) among information elements that are contained in the master system information block, is equal to a PLMN ID stored in the asynchronous mobile station, and if not, after the master system information block is cleared, the logic flow returns to the step S 211 , otherwise the logic flow proceeds to step S 213 . 
   At step the S 213 , the asynchronous mobile station determines if a type of a core network is a global system for mobile communications-mobile application part (GSM-MAP), and if not, the logic flow proceeds to step S 220 , otherwise proceeds to step S 214  where information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 215 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 216 , the asynchronous mobile station receives the system information message. 
   At step S 217 , a system information block is selected from the received system information message. 
   At step S 218 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 216 , otherwise the logic flow proceeds to step S 219 . 
   At the step S 219 , information related to the radio resource is stored in the RRC protocol and information unrelated to the radio resource is stored in the asynchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 220 , information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 221 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 222 , the asynchronous mobile station receives the system information message. 
   At step S 223 , a system information block is selected from the received system information message. 
   At step S 224 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 222 , otherwise the logic flow proceeds to step S 225 . 
   At the step S 225 , the asynchronous mobile station determines if the selected system information block is related to a private neighbor list message, and if not, the logic flow proceeds to step S 227 , otherwise proceeds to step S 226  where all information elements contained in the selected system information block are stored in the synchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 227 , information related to the radio resource is stored in the RRC protocol entity. Then, the asynchronous mobile station awaits a next system information message. 
   Embodiment 3 
   As shown in  FIG. 4 , in case an international mobile telecommunication-2000 (IMT-2000) system has an interlocking structure which includes an asynchronous mobile station, an asynchronous radio network and a synchronous ANSI-41 core network, a synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station are activated. In this case, information related to a radio resource is represented asynchronous. All messages which are exchanged between the asynchronous mobile station and the asynchronous radio network, are represented asynchronous. On the contrary, information unrelated to the radio resource is represented synchronous for the synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station. 
   Referring to  FIG. 19 , information elements of a system parameters message are classified into information elements related to the radio resource and information elements unrelated to the radio resource, in order to select and transmit to the asynchronous mobile station, the information elements unrelated to the radio resource from the information elements of the system parameters message that is included in an overhead message of a synchronous system. 
   As shown in  FIG. 19 , information elements corresponding to a NON-RRC are not related to the radio resource and information elements corresponding to a RRC are related to the radio resource. 
   In accordance with the present invention, referring to  FIG. 20 , a new type of system information block is represented, in order to transmit to the asynchronous mobile station, the classified information elements unrelated to the radio resource by using a system information message that is transmitted via a broadcast control channel (BCCH). 
   The new type of system information block is substituted for another system information block that is formatted in a predetermined position of the system information message, and is transmitted to the asynchronous mobile station irrespective of which state the asynchronous mobile station is in, an idle mode or a connected mode. 
   In  FIG. 20 , a &lt;maxSysInfoBlockcount&gt; recorded in a Range Bound refers to a maximum number that is a criterion of other system information blocks. 
   In case the synchronous ANSI-41 core network is interlocked with the asynchronous radio network as shown in  FIG. 4 , the asynchronous radio network transmits a synchronous message to the asynchronous mobile station according to a procedure shown in  FIG. 14  in accordance with the present invention for the synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station. 
   At step S 101 , an asynchronous radio network determines if a ANSI-41 core network is interlocked, and if not, a logic flow proceeds to step S 102  where the asynchronous radio network transmits a system information message to an asynchronous mobile station via a broadcast control channel (BCCH), otherwise the logic flow proceeds to step S 103  where the asynchronous radio network generates a new system information block, contents of which are varied with information to be transmitted. 
   At step S 104 , the new system information block is formatted in the system information message. 
   At step S 105 , the system information message is transmitted to the asynchronous mobile station. 
   The asynchronous mobile station shown in  FIG. 4  receives the system information message transmitted from the asynchronous radio network at the synchronous call control (CC) and mobility management (MM) protocol entities of the asynchronous mobile station, selects out a system parameters message that is recorded in the new system information block of the system information message and performs an operation corresponding to the selected system parameters message. 
     FIG. 21  shows a procedure where an asynchronous mobile station receives and processes a system parameters message included in an overhead message that is used in a synchronous system, based on a system information message that is used in an asynchronous system. 
   At step S 311 , the asynchronous mobile station receives a master system information block transmitted from an asynchronous radio network via a broadcast control channel (BCCH). 
   At step S 312 , the asynchronous mobile station determines if a public land mobile network identity (PLMN ID) among information elements that are contained in the master system information block, is equal to a PLMN ID stored in the asynchronous mobile station, and if not, after the master system information block is cleared, the logic flow returns to the step S 311 , otherwise the logic flow proceeds to step S 313 . 
   At step the S 313 , the asynchronous mobile station determines if a type of a core network is a global system for mobile communications-mobile application part (GSM-MAP), and if not, the logic flow proceeds to step S 320 , otherwise proceeds to step S 314  where information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 315 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 316 , the asynchronous mobile station receives the system information message. 
   At step S 317 , a system information block is selected from the received system information message. 
   At step S 318 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 316 , otherwise the logic flow proceeds to step S 319 . 
   At the step S 319 , information related to the radio resource is stored in the RRC protocol and information unrelated to the radio resource is stored in the asynchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 320 , information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 321 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 322 , the asynchronous mobile station receives the system information message. 
   At step S 323 , a system information block is selected from the received system information message. 
   At step S 324 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 322 , otherwise the logic flow proceeds to step S 325 . 
   At the step S 325 , the asynchronous mobile station determines if the selected system information block is related to a system parameters message, and if not, the logic flow proceeds to step S 327 , otherwise proceeds to step S 326  where all information elements contained in the selected system information block are stored in the synchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 327 , information related to the radio resource is stored in the RRC protocol entity. Then, a the asynchronous mobile station awaits a next system information message. 
   Embodiment 4 
   As shown in  FIG. 4 , in case an international mobile telecommunication-2000 (IMT-2000) system has an interlocking structure which includes an asynchronous mobile station, an asynchronous radio network and a synchronous ANSI-41 core network, a synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station are activated. In this case, information related to a radio resource is represented asynchronous. All messages which are exchanged between the asynchronous mobile station and the asynchronous radio network, are represented asynchronous. On the contrary, information unrelated to the radio resource is represented synchronous for the synchronous call control (CC) and the synchronous mobility management (MM) protocol entities of an asynchronous mobile station. 
   Referring to  FIG. 22 , information elements of an extended global service redirection message are classified into information elements related to the radio resource and information elements unrelated to the radio resource, in order to select and transmit to the asynchronous mobile station, the information elements unrelated to the radio resource from the information elements of the extended global service redirection message that is included in an overhead message of a synchronous system. 
   As shown in  FIG. 22 , information elements corresponding to a NON-RRC are not related to the radio resource and information elements corresponding to a RRC are related to the radio resource. 
   In accordance with the present invention, referring to  FIG. 23 , a new type of system information block is represented, in order to transmit to the asynchronous mobile station, the classified information elements unrelated to the radio resource by using a system information message that is transmitted via a broadcast control channel (BCCH). 
   The new type of system information block is substituted for another system information block that is formatted in a predetermined position of the system information message, and is transmitted to the asynchronous mobile station irrespective of which state the asynchronous mobile station is in, an idle mode or a connected mode. 
   In  FIG. 23 , a &lt;maxSysInfoBlockcount&gt; recorded in a Range Bound refers to a maximum number that is a criterion of other system information blocks. 
   In case the synchronous ANSI-41 core network is interlocked with the asynchronous radio network as shown in  FIG. 4 , the asynchronous radio network transmits a synchronous message to the asynchronous mobile station according to a procedure shown in  FIG. 14  in accordance with the present invention for the synchronous call control (CC) and the synchronous mobility management (MM) protocol entities of the asynchronous mobile station. 
   At step S 101 , an asynchronous radio network determines if a ANSI-41 core network is interlocked, and if not, a logic flow proceeds to step S 102  where the asynchronous radio network transmits a system information message to an asynchronous mobile station via a broadcast control channel (BCCH), otherwise the logic flow proceeds to step S 103  where the asynchronous radio network generates a new system information block, contents of which are varied with information to be transmitted. 
   At step S 104 , the new system information block is formatted in the system information message. 
   At step S 105 , the system information message is transmitted to the asynchronous mobile station. 
   The asynchronous mobile station shown in  FIG. 4  receives the system information message transmitted from the asynchronous radio network at the synchronous call control (CC) and mobility management (MM) protocol entities of the asynchronous mobile station, selects out the extended global service redirection message that is recorded in the new system information block of the system information message and performs an operation corresponding to the selected extended global service redirection message. 
     FIG. 24  shows a procedure where an asynchronous mobile station receives and processes the extended global service redirection message included in an overhead message that is used in a synchronous system, based on a system information message that is used in an asynchronous system. 
   At step S 411 , the asynchronous mobile station receives a master system information block transmitted from an asynchronous radio network via a broadcast control channel (BCCH). 
   At step S 412 , the asynchronous mobile station determines if a public land mobile network identity (PLMN ID) among information elements that are contained in the master system information block, is equal to a PLMN ID stored in the asynchronous mobile station, and if not, after the master system information block is cleared, the logic flow returns to the step S 411 , otherwise the logic flow proceeds to step S 413 . 
   At step the S 413 , the asynchronous mobile station determines if a type of a core network is a global system for mobile communications-mobile application part (GSM-MAP), and if not, the logic flow proceeds to step S 420 , otherwise proceeds to step S 414  where information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 415 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 416 , the asynchronous mobile station receives the system information message. 
   At step S 417 , a system information block is selected from the received system information message. 
   At step S 418 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 416 , otherwise the logic flow proceeds to step S 419 . 
   At the step S 419 , information related to the radio resource is stored in the RRC protocol and information unrelated to the radio resource is stored in the asynchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 420 , information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 421 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 422 , the asynchronous mobile station receives the system information message. 
   At step S 423 , a system information block is selected from the received system information message. 
   At step S 424 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 422 , otherwise the logic flow proceeds to step S 425 . 
   At the step S 425 , the asynchronous mobile station determines if the selected system information block is related to an extended global service redirection message, and if not, the logic flow proceeds to step S 427 , otherwise proceeds to step S 426  where all information elements contained in the selected system information block are stored in the synchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 427 , information related to the radio resource is stored in the RRC protocol entity. Then, the asynchronous mobile station awaits a next system information message. 
   Embodiment 5 
   As shown in  FIG. 4 , in case an international mobile telecommunication-2000 (IMT-2000) system has an interlocking structure which includes an asynchronous mobile station, an asynchronous radio network and a synchronous ANSI-41 core network, a synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station are activated. In this case, information related to a radio resource is represented asynchronous. All messages which are exchanged between the asynchronous mobile station and the asynchronous radio network, are represented asynchronous. On the contrary, information unrelated to the radio resource is represented synchronous for the synchronous call control (CC) and the synchronous mobility management (MM) protocol entities of the asynchronous mobile station. 
   Referring to  FIG. 25 , information elements of an extended system parameters message are classified into information elements related to the radio resource and information elements unrelated to the radio resource, in order to select and transmit to the asynchronous mobile station, the information elements unrelated to the radio resource from the information elements of the extended system parameters message that is included in an overhead message of a synchronous system. 
   As shown in  FIG. 25 , information elements corresponding to a NON-RRC are not related to the radio resource and information elements corresponding to a RRC are related to the radio resource. 
   In accordance with the present invention, referring to  FIG. 26 , a new type of system information block is represented, in order to transmit to the asynchronous mobile station, the classified information elements unrelated to the radio resource by using a system information message that is transmitted via a broadcast control channel (BCCH). 
   The new type of system information block is substituted for another system information block that is formatted in a predetermined position of the system information message, and is transmitted to the asynchronous mobile station irrespective of which state the asynchronous mobile station is in, an idle mode or a connected mode. 
   In  FIG. 26 , a &lt;maxSysInfoBlockcount&gt; recorded in a Range Bound refers to a maximum number that is a criterion of other system information blocks. 
   In case the synchronous ANSI-41 core network is interlocked with the asynchronous radio network as shown in  FIG. 4 , the asynchronous radio network transmits a synchronous message to the asynchronous mobile station according to a procedure shown in  FIG. 14  in accordance with the present invention for the synchronous call control (CC) and the synchronous mobility management (MM) protocol entities of the asynchronous mobile station. 
   At step S 101 , an asynchronous radio network determines if a ANSI-41 core network is interlocked, and if not, a logic flow proceeds to step S 102  where the asynchronous radio network transmits a system information message to an asynchronous mobile station via a broadcast control channel (BCCH), otherwise the logic flow proceeds to step S 103  where the asynchronous radio network generates a new system information block, contents of which are varied with information to be transmitted. 
   At step S 104 , the new system information block is formatted in the system information message. 
   At step S 105 , the system information message is transmitted to the asynchronous mobile station. 
   The asynchronous mobile station shown in  FIG. 4  receives the system information message transmitted from the asynchronous radio network at the synchronous call control (CC) and mobility management (MM) protocol entities of the asynchronous mobile station, selects out the extended system parameters message that is recorded in the new system information block of the system information message and performs an operation corresponding to the selected extended system parameters message. 
     FIG. 27  shows a procedure where an asynchronous mobile station receives and processes the extended system parameters message included in an overhead message that is used in a synchronous system, based on a system information message that is used in an asynchronous system. 
   At step S 511 , the asynchronous mobile station receives a master system information block transmitted from an asynchronous radio network via a broadcast control channel (BCCH). 
   At step S 512 , the asynchronous mobile station determines if a public land mobile network identity (PLMN ID) among information elements that are contained in the master system information block, is equal to a PLMN ID stored in the asynchronous mobile station, and if not, after the master system information block is cleared, the logic flow returns to the step S 511 , otherwise the logic flow proceeds to step S 513 . 
   At step the S 513 , the asynchronous mobile station determines if a type of a core network is a global system for mobile communications-mobile application part (GSM-MAP), and if not, the logic flow proceeds to step S 520 , otherwise proceeds to step S 514  where information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 515 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 516 , the asynchronous mobile station receives the system information message. 
   At step S 517 , a system information block is selected from the received system information message. 
   At step S 518 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 516 , otherwise the logic flow proceeds to step S 519 . 
   At the step S 519 , information related to the radio resource is stored in the RRC protocol and information unrelated to the radio resource is stored in the asynchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 520 , information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 521 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 522 , the asynchronous mobile station receives the system information message. 
   At step S 523 , a system information block is selected from the received system information message. 
   At step S 524 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 522 , otherwise the logic flow proceeds to step S 525 . 
   At the step S 525 , the asynchronous mobile station determines if the selected system information block is related to an extended system parameters message, and if not, the logic flow proceeds to step S 527 , otherwise proceeds to step S 526  where all information elements contained in the selected system information block are stored in the synchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 527 , information related to the radio resource is stored in the RRC protocol entity. Then, the asynchronous mobile station awaits a next system information message. 
   Embodiment 6 
   As shown in  FIG. 4 , in case an international mobile telecommunication-2000 (IMT-2000) system has an interlocking structure which includes an asynchronous mobile station, an asynchronous radio network and a synchronous ANSI-41 core network, a synchronous call control (CC) and a synchronous mobility management (MM) protocol entities of an asynchronous mobile station are activated. In this case, information related to a radio resource is represented asynchronous. All messages which are exchanged between the asynchronous mobile station and the asynchronous radio network, are represented asynchronous. On the contrary, information unrelated to the radio resource is represented synchronous for the synchronous call control (CC) and the synchronous mobility management (MM) protocol entities of the asynchronous mobile station. 
   Referring to  FIG. 28 , information elements of a global service redirection message are classified into information elements related to the radio resource and information elements unrelated to the radio resource, in order to select and transmit to the asynchronous mobile station, the information elements unrelated to the radio resource from the information elements of the global service redirection message that is included in an overhead message of a synchronous system. 
   As shown in  FIG. 28 , information elements corresponding to a NON-RRC are not related to the radio resource and information elements corresponding to a RRC are related to the radio resource. 
   In accordance with the present invention, referring to  FIG. 29 , a new type of system information block is represented, in order to transmit to the asynchronous mobile station, the classified information elements unrelated to the radio resource by using a system information message that is transmitted via a broadcast control channel (BCCH). 
   The new type of system information block is substituted for another system information block that is formatted in a predetermined position of the system information message, and is transmitted to the asynchronous mobile station irrespective of which state the asynchronous mobile station is in, an idle mode or a connected mode. 
   In  FIG. 29 , a &lt;maxSysInfoBlockcount&gt; recorded in a Range Bound refers to a maximum number that is a criterion of other system information blocks. 
   In case the synchronous ANSI-41 core network is interlocked with the asynchronous radio network as shown in  FIG. 4 , the asynchronous radio network transmits a synchronous message to the asynchronous mobile station according to a procedure shown in  FIG. 14  in accordance with the present invention for the synchronous call control (CC) and the synchronous mobility management (MM) protocol entities of the asynchronous mobile station. 
   At step S 101 , an asynchronous radio network determines if a ANSI-41 core network is interlocked, and if not, a logic flow proceeds to step S 102  where the asynchronous radio network transmits a system information message to an asynchronous mobile station via a broadcast control channel (BCCH), otherwise the logic flow proceeds to step S 103  where the asynchronous radio network generates a new system information block, contents of which are varied with information to be transmitted. 
   At step S 104 , the new system information block is formatted in the system information message. 
   At step S 105 , the system information message is transmitted to the asynchronous mobile station. 
   The asynchronous mobile station shown in  FIG. 4  receives the system information message transmitted from the asynchronous radio network at the synchronous call control (CC) and mobility management (MM) protocol entities of the asynchronous mobile station, selects out the global service redirection message that is recorded in the new system information block of the system information message and performs an operation corresponding to the selected global service redirection message. 
     FIG. 30  shows a procedure where an asynchronous mobile station receives and processes the global service redirection message included in an overhead message that is used in a synchronous system, based on a system information message that is used in an asynchronous system. 
   At step S 611 , the asynchronous mobile station receives a master system information block transmitted from an asynchronous radio network via a broadcast control channel (BCCH). 
   At step S 612 , the asynchronous mobile station determines if a public land mobile network identity (PLMN ID) among information elements that are contained in the master system information block, is equal to a PLMN ID stored in the asynchronous mobile station, and if not, after the master system information block is cleared, the logic flow returns to the step S 511 , otherwise the logic flow proceeds to step S 613 . 
   At step the S 613 , the asynchronous mobile station determines if a type of a core network is a global system for mobile communications-mobile application part (GSM-MAP), and if not, the logic flow proceeds to step S 620 , otherwise proceeds to step S 614  where information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 615 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 616 , the asynchronous mobile station receives the system information message. 
   At step S 617 , a system information block is selected from the received system information message. 
   At step S 618 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 516 , otherwise the logic flow proceeds to step S 619 . 
   At the step S 619 , information related to the radio resource is stored in the RRC protocol and information unrelated to the radio resource is stored in the asynchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 620 , information about a type of system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 621 , scheduling information about the system information blocks is stored in the asynchronous mobile station that the asynchronous mobile station should cyclically receive via the system information message, based on the master system information block. 
   At step S 622 , the asynchronous mobile station receives the system information message. 
   At step S 623 , a system information block is selected from the received system information message. 
   At step S 624 , the asynchronous mobile station determines if the selected system information block is equal to a system information block (SIB) that the asynchronous mobile station should receive, and if not, the received system information message is cleared and the logic flow returns to the step S 622 , otherwise the logic flow proceeds to step S 625 . 
   At the step S 625 , the asynchronous mobile station determines if the selected system information block is related to a global service redirection message, and if not, the logic flow proceeds to step S 627 , otherwise proceeds to step S 626  where all information elements contained in the selected system information block are stored in the synchronous CC and MM protocol entities. Then, the asynchronous mobile station awaits a next system information message. 
   At the step S 627 , information related to the radio resource is stored in the RRC protocol entity. Then, the asynchronous mobile station awaits a next system information message. 
   Also, it is necessary to provide a method for generating a system information block of a new concept so that it is possible to perform a good data interface between the asynchronous mobile station, the asynchronous radio network and the synchronous core network, in case the synchronous core network is interlocked with the asynchronous mobile communication system. 
   In other words, a new system information block should be generated, in order that the asynchronous radio network transmits information fields related to the synchronous core network to the asynchronous mobile station. 
   In this case, the new system information block is generated, based on following criteria of an area scope, a modification frequency, a user equipment (UE) mode and a core network (CN) type. 
   The area scope, the modification frequency and the user equipment are used as criteria for generating the system information block in the conventional asynchronous mobile communication system. 
   Considering that the synchronous core network is interlocked with the asynchronous radio network, the CN type is added in the criteria in accordance with the present invention. The CN type is used as criteria for determining whether a currently generated system information block has information fields related to the GSM-MAP core network or the ANSI-41 core network. 
     FIG. 31  is a flow chart illustrating a method for generating a system information block corresponding to a type of an interlocked core network in accordance with the present invention. 
   Referring to  FIG. 31 , at step S 111 , the asynchronous radio network acquires information about a type of the core network interlocked with it by exchanging a message with the core network. 
   At step S 12 , the asynchronous radio network determines the type of the core network. 
   If the type of the core network is the asynchronous GSM-MAP core network, at step S 13 , new information fields for generating the system information block are combined in the asynchronous radio network. 
   At step S 14 , the type of the core network related to the combined new information fields is determined, based on a core network (CN) type criteria. In this case, a determined type of the core network is the GSM-MAP core network. 
   At step S 15 , an effective area in which the combined new information fields are used is defined, based on area scope criteria. The effective area refers to a cell size or a size of a universal mobile telecommunication system registration area (URA) including a plurality of cells. The effective area is determined, based on a characteristic of the combined new information fields. 
   At step S 16 , an update cycle of the combined new information fields is determined, based on modification frequency criteria. If the combined new information fields are information related to a radio resource, the update cycle having a short cycle time and if the combined new information fields are information unrelated to the radio resource, the update cycle having the long cycle time is determined, by analyzing the characteristic and a utility of the combined new information fields. 
   At step S 17 , a user equipment (UE) mode wherein the combined new information fields are used is determined, based on UE mode criteria. It is determined whether the combined new information fields are used in an idle mode or a connected mode of the UE, by analyzing the characteristic and the utility of the combined new information fields. 
   A new system information block is generated by the above procedure. 
   If the type of the core network is the synchronous ANSI-41 core network, at step S 18 , new information fields for generating the system information block are combined in the asynchronous radio network. 
   At step S 19 , it is determined whether the combined new information fields are related to the asynchronous system or the synchronous system. 
   If the combined new information fields are related to the asynchronous system, at step S 20 , the type of the core network related to the combined new information fields is determined, based on a core network (CN) type criteria. In this case, a determined type of the core network is the GSM-MAP core network. 
   At step S 21 , an effective area in which the combined new information fields are used is defined, based on area scope criteria. The effective area refers to a cell size or a size of a universal mobile telecommunication system registration area (URA) including a plurality of cells. The effective area is determined, based on a characteristic of the combined new information fields. 
   At step S 22 , an update cycle of the combined new information fields is determined, based on modification frequency criteria. If the combined new information fields are information related to a radio resource, the update cycle having a short cycle time and if the combined new information fields are information unrelated to the radio resource, the update cycle having the long cycle time is determined, by analyzing the characteristic and a utility of the combined new information fields. 
   At step S 23 , a user equipment (UE) mode wherein the combined new information fields are used is determined, based on UE mode criteria. It is determined whether the combined new information fields are used in an idle mode or a connected mode of the UE, by analyzing the characteristic and the utility of the combined new information fields. 
   A new system information block is generated by the above procedure. 
   As the result of the determination at the step S 19 , if the combined new information fields are related to the synchronous system, at step S 24 , the type of the core network related to the combined new information fields is determined, based on a core network (CN) type criteria. In this case, a determined type of the core network is the ANSI-41 core network. 
   At step S 25 , an effective area in which the combined new information fields are used is defined, based on area scope criteria. The effective area refers to a cell size or a size of a universal mobile telecommunication system registration area (URA) including a plurality of cells. The effective area is determined, based on a characteristic of the combined new information fields. 
   At step S 26 , an update cycle of the combined new information fields is determined, based on modification frequency criteria. If the combined new information fields are information related to a radio resource, the update cycle having a short cycle time and if the combined new information fields are information unrelated to the radio resource, the update cycle having the long cycle time is determined, by analyzing the characteristic and a utility of the combined new information fields. 
   At step S 27 , a user equipment (UE) mode wherein the combined new information fields are used is determined, based on UE mode criteria. It is determined whether the combined new information fields are used in an idle mode or a connected mode of the UE, by analyzing the characteristic and the utility of the combined new information fields. 
   A new system information block is generated by the above procedure. 
   The new system information block generated as described above is inserted in a system information message and then transmitted to the asynchronous mobile station via a broadcast control channel (BCCH). 
   Accordingly, even when the synchronous ANSI-41 core network is interlocked with the asynchronous mobile communication system, a subscriber of the asynchronous mobile communication system can use a service provided from the ANSI-41 core network without changing a structure of the asynchronous mobile communication system or the structure of messages by generating the new type of the system information block. 
   Although the preferred embodiments of the invention have been disclosed for illustrative purpose, those skilled in the art will appreciate that various modifications, additions, and substitutions are possible, without departing from the scope and sprit of the invention as disclosed in the accompanying claims.