KR20010017931A - Method for interfacing network connected with synchronization radio network in synchronous communication system - Google Patents

Abstract

PURPOSE: A method for interfacing a network connected with a synchronous radio network in a synchronous communication system is provided to achieve interfacing with all networks connected to a synchronous radio network. CONSTITUTION: A base station controller in a synchronous radio network detects whether the type of a connected network is an asynchronous communication mode network or a synchronous communication mode network(S11). The base station controller sets up a network divider corresponding to the detected network type(S12). Then, the base station controller inserts the network divider into a required position of a synchronization channel message(S13). The base station controller transmits the synchronization channel message comprising network divider information to a synchronous terminal(S14).

Description

Method for interfacing network connected with synchronization radio network in synchronous communication system

The present invention relates to a network interface method in a synchronous mobile communication system (particularly, International Mobile Telecommunications-2000 (IMT-2000)). In particular, the present invention relates to a synchronous communication system capable of interfacing with all networks connected to a synchronous wireless network. The present invention relates to a network interface method connected to a wireless network.

More specifically, it distinguishes a network connected in a synchronous wireless network (referred to as a "network delimiter"), delivers the network delimiter to a synchronous terminal through a sync channel, and a synchronous terminal transmits the connected network. The present invention relates to a network interface method connected to a synchronous wireless network in a synchronous communication system capable of recognizing and smoothly interfacing a message with an arbitrary network connected by setting a protocol corresponding to the recognized network.

In a conventional synchronous mobile communication system, a synchronous terminal and a synchronous wireless network (which means "CDMA-2000 wireless network") of a synchronous communication method are connected, and are connected to an ANSI-41 network through a core network (CN).

In addition, in the conventional asynchronous mobile communication system, asynchronous terminal and asynchronous wireless network of asynchronous communication type UTRAN (UMRAN Terrestrial Radio Access Network) is connected, the core network (CN) Global System for Mobile Communication-Mobile Application GSM-MAP Part).

1 is a diagram illustrating a core network interworking structure of a synchronous / asynchronous mobile communication system as described above.

FIG. 1A is a diagram illustrating a core network interworking structure of a synchronous mobile communication system, in which reference numeral 11 denotes a synchronous terminal, and reference numeral 12 wirelessly interfaces data with the synchronous terminal 11 and includes a base station and a control station. Reference numeral 13 denotes a synchronous wireless network (CDMA-2000 wireless network), and the reference numeral 13 denotes a synchronous core network connected to the synchronous wireless network 12, which is a synchronous mobile communication switch (MSC) 14 and an ANSI-41 network (15). ).

That is, the synchronous terminal 11 of the synchronous mobile communication system is connected to the synchronous wireless network 12 as is well known, and the synchronous wireless network 12 is connected to the synchronous core network 13 to interface data.

1B is a diagram illustrating a core network interworking structure of an asynchronous mobile communication system, in which reference numeral 21 denotes an asynchronous terminal, 22 denotes an UTRAN, which is an asynchronous wireless network including a base station and a control station, and 23 denotes an UTRAN 22. An asynchronous core network including an asynchronous mobile communication switch (MSC) 24 to be connected and a GSM-MAP network 25 connected to the asynchronous mobile communication switch 24 is shown.

That is, the asynchronous terminal 21 of the asynchronous mobile communication system is connected to the UTRAN 22 which is an asynchronous wireless network, and the UTRAN 22 is connected to the asynchronous core network 23 to interface data.

2 is a diagram showing the protocol structure of each part of the synchronous / asynchronous mobile communication system as described above.

2A is a diagram illustrating a protocol structure of each part of a synchronous mobile communication system, in which reference numeral 30 denotes a synchronous terminal, reference numeral 40 denotes a synchronous wireless network, and 50 denotes a synchronous connected to the synchronous wireless network 40. Represents a core network.

The synchronization terminal 30 is divided into a layer 3 (31), a layer 2 (34), a layer 1 (35) and provided with a protocol corresponding to each level, in particular, the layer 3 (31) for call management A call control (CC) 32 and a synchronous mobility management unit (MM) 33 for mobility management are provided.

In addition, the synchronous radio network 40 includes protocols corresponding to the layer 3 (41), the layer 2 (42), and the layer 1 (43), and the same layer as each layer of the sync terminal 30 corresponds.

In addition, the synchronous core network 50 is divided into Layer 3 (51), Layer 2 (54), and Layer 1 (55) and provided with a protocol corresponding to each level. In particular, the layer 3 (51) includes call management. A call control (CC) 52 for synchronization and a mobility management unit (MM) 53 for mobility management are provided.

2B is a diagram illustrating a protocol structure of each part of an asynchronous mobile communication system, in which reference numeral 60 denotes an asynchronous terminal, 70 denotes a UTRAN, and 80 denotes an asynchronous core network.

The asynchronous terminal 60 is divided into a NAS unit 61, a layer 3 (64), a layer 2 (65), a layer 1 (66), and a protocol corresponding to each level is provided. 61 includes an asynchronous call control (CC) 62 for call management and an asynchronous mobility management unit (MM) 63 for mobility management.

Further, the UTRAN 70 corresponds to each layer of the asynchronous terminal 60 and also corresponds to each layer with the asynchronous core network 80. The layer 3 (71), the layer 2 (72), and the layer 1 (73). The corresponding protocol is implemented.

In addition, the asynchronous core network 80 is a NAS unit 81 having an asynchronous call control unit (CC) 82 for connecting to the asynchronous terminal 60, an asynchronous mobility management unit (MM) 83 for mobility management. And a protocol corresponding to Layer 3 (84), Layer 2 (85), and Layer 1 (86) for connecting to each layer in the UTRAN (70).

In the interworking structure as described above, the synchronization terminal 30 receives a synchronization channel message through a synchronization channel from a synchronous wireless network 40 of a synchronous communication method, and connects core network information or synchronization through the synchronization channel message. The synchronous terminal including the wireless network information acquires information necessary for accessing the network.

In addition, the asynchronous terminal 60 receives a system information message (System Information Message) from the UTRAN 70 through a broadcast control channel (BCCH), through which the asynchronous terminal including core network information or UTRAN information Information necessary for access to the network is obtained.

On the other hand, when the synchronous terminal and the wireless network of the synchronous communication method, and the synchronous ANSI-41 network interworking, the mobile terminal after power on (System Determination Sub-state), the pilot channel acquisition state System (wireless network and core network) information is obtained through a Pilot Channel Acquisition Sub-state, a Sync Channel Acquisition Sub-state, and a Timing Changing Sub-state.

FIG. 3 is a state transition diagram illustrating a process of acquiring system information through the four state transitions as described above in the mobile terminal of the synchronous mobile communication system.

In more detail,

First, the system decision state S1, which is the first state, is a state in which a synchronous terminal selects a CDMA system with which it should communicate. Before powering off, the synchronous terminal stores information such as a CDMA channel number, a CDMA region list, an SID list, an NID list, and the like, in its memory. After that, when the synchronous terminal powers on, it selects a CDMA system with which it can communicate using information in its memory and a CDMA system selection algorithm. CDMA system selection algorithms are provided by the handset manufacturer. After the terminal selects the CDMA system, the terminal transitions to the pilot channel acquisition state S2, which is the next state, to obtain a pilot.

The pilot channel acquisition state S2 is a state in which a terminal acquires a pilot channel and selects a base station. After the terminal selects the CDMA system, the terminal acquires a pilot having the same CDMA channel number using the same CDMA channel number, that is, the CDMA frequency number. After the UE acquires the pilot channel, the UE transitions to the next synchronization channel acquisition state (S3).

The synchronization channel acquisition state S3 is a state in which the terminal obtains information and timing information of a system selected by pilot channel acquisition. The terminal acquires selected system information and timing information of the system through a synchronization channel message transmitted through a synchronization channel at a base station selected in a pilot channel acquisition state. Such a sync channel message is generated by the system and transmitted to the terminal through a sync channel.

The information element shown in FIG. 4 is recorded in the sync channel message.

a) Protocol Revision Level (8 bits)

b) Minimum Protocol Revision Level (8 bits)

c) System Identification (15 bits)

d) Network Identification (16 bits)

e) Pilot PN sequence offset index (9 bits)

f) Long Code State (42 bit)

g) System time (36 bit)

h) The number of Leap seconds that have occurred since the start of system Time: 8 bits)

i) Offset of local time from System Time (6 bits)

j) Daylight savings time indicator (1 bit)

k) Paging Channel data rate (2 bits)

l) Frequency assignment information (Frequency assignment: 11 bits)

m) Extended frequency assignment information (Extended frequency assignment: 11 bits)

n) Orthogonal transmit diversity mode information (2 bits)

The sync terminal stores the following information elements in a memory among received sync channel messages.

a) Protocol Revision Level (8 bits)

b) Minimum Protocol Revision Level (8 bits)

c) System Identification (15 bits)

d) Network Identification (16 bits)

e) Pilot PN sequence offset index (9 bits)

f) Long code state information (42 bits)

g) System time (36 bit)

h) Paging Channel data rate (2 bits)

i) Orthogonal transmit diversity mode information (2 bits)

After this process is completed, the synchronization terminal transitions to the synchronization state (S4).

The synchronization state S4 is a state in which synchronization with the CDMA system selected by the terminal is synchronized. The information element stored in the sync channel message received by the terminal in the sync channel acquisition state is used to synchronize synchronization with the system selected by the terminal. After the operation in this state is completed, the terminal operates in the standby mode (S5).

In the standby mode, the terminal monitors the paging channel of the selected system. That is, in the standby mode, the terminal receives a message (System Parameter Message, Access Channel Message, Registration Request Message, etc.) transmitted to the paging channel to the system.

In the case of IMT-2000 system synchronous method, GSM-MAP network which is used asynchronously or ANSI-41 network which is used synchronously can be used as core network according to May 1999 OHG requirements decision. It can have two types of interworking structure.

First, the synchronization terminal, the synchronous communication method and the ANSI-41 network interworking structure, and second, the synchronous terminal, the synchronous communication method and the GSM-MAP network interworking structure.

In order to be able to operate adaptively to these two structures, the synchronous terminal, unlike the synchronous terminal used in the conventional synchronous mobile communication system, is a CC for GSM-MAP core network service in Layer 3 of the protocol stack structure. It has both MM protocol entities and CC and MM protocol entities for ANSI-41 core network services.

As described above, in the IMT-2000 system synchronous method, since there may be two interworking structures, the synchronous terminal should know information on the type of core network currently connected to the synchronous terminal. Information on the type of core network currently connected should be provided. This information should be included in the sync channel message received through the sync channel in the conventional interlocking scheme described above after the sync terminal is powered on.

However, in the synchronous channel message used in the conventional synchronous mobile communication system (synchronous terminal, synchronous communication wireless network and ANSI-41 core network) (see Fig. 4), only the information defined in the synchronous channel acquisition state of the terminal is shown. It does not contain any information about the core network type.

Therefore, since there is no information on the core network type, the synchronous terminal cannot determine which scheme (ANSI-41 or GSM-MAP) CC or MM protocol is used in Layer 3 of its own protocol stack structure. Interworking with the network (meaning interworking with the asynchronous core network) is not possible. Of course, when the currently connected core network in the synchronous mobile communication system is a synchronous core network, there is no problem in interworking with the core network.

In other words, although the currently implemented synchronous terminal is configured to communicate with both synchronous and asynchronous communication systems, since it is not known information about the core network, it is not possible to interwork with other networks than the synchronous network. There is an impossible disadvantage.

Accordingly, the present invention has been proposed to solve various problems occurring in the conventional synchronous mobile communication system as described above.

It is an object of the present invention to provide a network interface method connected to a synchronous wireless network in a synchronous communication system capable of interfacing with all networks connected to a synchronous wireless network.

More specifically, it distinguishes a network connected in a synchronous wireless network (referred to as a "network delimiter"), delivers the network delimiter to a synchronous terminal through a sync channel, and a synchronous terminal transmits the connected network. The present invention provides a network interface method connected to a synchronous wireless network in a synchronous communication system capable of recognizing and setting a protocol corresponding to the recognized network and a message interface smoothly connected thereto.

The present invention for achieving this object,

In the network interface method of a synchronous mobile communication system having a synchronous terminal and a synchronous wireless network,

The first step of the control station in the synchronous wireless network to distinguish the type of the network to be connected, insert the network identifier into the synchronization channel message and transmits to the synchronous terminal through the synchronization channel;

The synchronization terminal receiving the synchronization channel message transmitted from the synchronization wireless network,

a) extracting a network separator inserted at a predetermined position of a sync channel message,

b) recognize the type of core network connected to the synchronous wireless network according to the extracted network identifier;

c) a second process of setting a synchronous or asynchronous protocol so that a message interface can correspond to the recognized core network.

In the above, the control station,

The type of the connected network may be determined by using information of a dip switch or a ROM when the system is initialized.

In addition, the control station,

The type of the connected core network may be determined by exchanging signaling messages between the connected core network and the operation maintenance related message or between the control station and the core network.

In addition, the synchronization terminal,

If the network type recognized through the network identifier extracted from the synchronous channel message is an ANSI-41 core network, the current protocol state is maintained. If the recognized network type is GSM-MAP, the asynchronous protocol is activated to interface the asynchronous message. It features.

1 is a diagram illustrating a network interworking structure of a conventional synchronous / asynchronous mobile communication system.

1A illustrates a network interworking structure of a synchronous mobile communication system.

1B is a diagram illustrating a network interworking structure of an asynchronous mobile communication system,

FIG. 2 is a diagram illustrating each protocol layer structure in a conventional synchronous / asynchronous mobile communication system.

2A is a diagram illustrating a protocol layer structure of each part of a synchronous mobile communication system;

2b is a diagram illustrating a protocol layer structure of each part of an asynchronous mobile communication system,

3 is a state transition diagram of a synchronization terminal in a conventional synchronous mobile communication system,

4 is a format diagram of a synchronization channel message received by a synchronization terminal in a conventional synchronous mobile communication system.

5 is a diagram illustrating an interworking structure with a network connected to a synchronous wireless network in a synchronous communication system according to the present invention.

5a is a diagram illustrating an interworking structure between a synchronous terminal, a synchronous wireless network, and an ANSI-41 network;

5b is a diagram illustrating an interworking structure between a synchronous terminal, a synchronous wireless network, and a GSM-MAP network;

6 is a protocol hierarchy structure diagram of a synchronous terminal in the present invention.

Figure 6a is a protocol layer structure diagram of a synchronous terminal interworking with the ANSI-41 core network,

6b is a protocol layer structure diagram of a synchronous terminal interworking with a GSM-MAP core network;

7 is a format diagram of a sync channel message received by a sync terminal in the present invention;

8 is a flowchart illustrating a network interface method connected to a synchronous wireless network in a synchronous communication system according to the present invention.

8A is a flowchart illustrating a process of classifying a type of a network connected in a synchronous wireless network and transmitting the network identification information to a synchronous terminal.

8B is a flowchart illustrating a process of matching timing with a connected core network in a synchronization terminal receiving network classification information.

<Explanation of symbols for main parts of drawing>

100: synchronous terminal

110: synchronous wireless network

120: synchronous core network (ANSI-41 core network)

130: asynchronous core network (GSM-MAP network)

Hereinafter, a preferred embodiment of the present invention according to the technical spirit as described above will be described in detail with reference to the accompanying drawings.

5 is a view illustrating an interworking structure of a core network connected to a synchronous terminal of a synchronous mobile communication system according to the present invention.

5A illustrates a core network interworking structure of a general synchronous mobile communication system, in which 100 represents a synchronous terminal, 110 represents a synchronous wireless network, and 120 represents a synchronous core network.

5B illustrates an interworking structure when a core network connected in a general synchronous mobile communication system is an asynchronous core network, reference numeral 100 denotes a synchronous terminal, 110 synchronous wireless network, and 130 denotes an asynchronous core network. The network 130 includes a GSM-MAP network.

Here, the protocol of each part should be converted correspondingly according to the core network (synchronous core network or asynchronous core network) connected to the synchronous mobile communication system.

6 is a diagram illustrating the protocol state of each unit according to the type of the core network connected to the synchronization terminal.

First, FIG. 6A illustrates a protocol structure of each part when a connected core network is a synchronous core network. Reference numeral 100 denotes a synchronous terminal, 110 denotes a synchronous wireless network, and 120 denotes a synchronous wireless network 110. The core network is the ANSI-41 core network.

In this interworking structure, the synchronization terminal 100 is divided into a layer 3 (101), a layer 2 (106), a layer 1 (107), and the layer 3 (101) is a sync CC (102), a sync MM (103), Both asynchronous CC 104 and asynchronous MM 105 are provided, and the protocol of the CC / MM is selectively activated according to the network identifier (a code for identifying the type of network).

For example, since the currently connected network is the ANSI-41 core network 120, the protocols of the synchronous CC 102 and the synchronous MM 103 are activated to interface the message with the ANSI-41 core network 120.

Next, the synchronous wireless network 110 is composed of layer 3 (111), layer 2 (112), layer 1 (113), each layer of the synchronization terminal 100 and each layer of the ANSI-41 core network 120 Corresponds to the message by activating the protocol.

In addition, the ANSI-41 core network 120 is divided into layer 3 (121), layer 2 (124), and layer 1 (125), and layer 3 (121) is a synchronous CC (122) and a synchronous MM (123). ).

On the other hand, when the core network connected to the synchronous mobile communication system is an asynchronous core network as shown in FIG. 5B, it has a protocol structure as shown in FIG. 6B.

Here, reference numeral 100 denotes a synchronous terminal, reference numeral 110 denotes a synchronous radio network, and reference numeral 130 denotes an asynchronous core network.

In this interworking structure, the synchronization terminal 100 is divided into a layer 3 (101), a layer 2 (106), and a layer 1 (107), and the layer 3 (101) is a sync CC (102) and a sync MM (103). And asynchronous CC 104 and asynchronous MM 105, all of which selectively activate the protocol of the CC / MM according to the network identifier (a code for identifying the type of network).

For example, since the currently connected network is the GSM-MAP core network 130, the protocol of the asynchronous CC 104 and the asynchronous MM 105 is activated to interface the message with the GSM-MAP core network 130.

Next, the synchronous wireless network 110 is composed of layer 3 (111), layer 2 (112), layer 1 (113), each layer of the synchronization terminal 100 and each layer of the GSM-MAP core network 130 Corresponds to the message by activating the protocol.

In addition, the GSM-MAP core network 130 is divided into a NAS unit 131, a layer 3 134, a layer 2 135, and a layer 1 136, and the NAS unit 131 is an asynchronous CC ( 132, an asynchronous MM 133.

As described above, in order to smoothly perform the message interface with the connected core network by adaptively setting the corresponding protocol according to the type of the core network connected in the synchronous mobile communication system, the type of the network to be connected must be determined and the synchronous terminal ( 100).

FIG. 8 is a flowchart illustrating a network interface method connected to a synchronous wireless network in a synchronous communication system according to the present invention. FIG. 8A illustrates a process of classifying and transmitting a network type in a synchronous wireless network including a base station and a control station. 8B is a flowchart illustrating a process of matching timing with a connected core network in a synchronous terminal receiving network classification information.

First, referring to FIG. 8A, in step S11, the control station BSC in the synchronous wireless network 110 detects the type of connected network (dividing whether it is an asynchronous communication network or a synchronous communication network).

Here, as a method of detecting the type of the connected network from the control station, there may be a method of determining the type of the connected network using information of a dip switch or a ROM when the system is initialized. It is also possible to determine the type of core network connected by exchanging operational maintenance related messages.

In addition, it is possible to determine the type of the connected core network in parallel with two well-known methods, or the type of the connected core network can be determined by simply modifying the aforementioned methods.

Next, in step S12, a network identifier corresponding to the detected network type is set. For example, if the connected core network is an ANSI-41 core network, set the network identifier bit to "1". If the connected core network is a GSM-MAP core network, set the network identifier bit to "0". do.

Thereafter, the network separator set in step S13 is inserted into a predetermined position of a sync channel message.

Here, the sync channel message has a structure as shown in FIG.

Looking at the structure of the sync channel message shown in Figure 7 in more detail,

The first field is the protocol revision level (8 bits),

The second field is the minimum protocol revision level (8 bits),

The third field is a system identifier (15 bits),

The fourth field is a network identifier (16 bits),

The fifth field is the pilot PN sequence offset index (9 bits),

The sixth field is Long Code State (42 bits),

The seventh field is the system time (36 bit),

The eighth field is The number of Leap seconds that have occurred since the start of system Time (8 bits),

The ninth field is Offset of local time from System Time (6 bits),

The tenth field contains Daylight savings time indicator (1 bit),

The eleventh field is the paging channel data rate (2 bits),

The second field of the column is frequency allocation information (11 bits),

The third field is extended frequency assignment information (11 bits),

The fourth field is orthogonal transmit diversity mode information (2 bits),

The last fifteenth field records network identifier information (1 bit) added as a new information element in the present invention.

Here, the network identifier information is information indicating whether the core network connected to the wireless network of the synchronous communication system is an ANSI-41 network or the GSM-MAP network. For example, the core network connected to the wireless network of the synchronous communication system is ANSI. The network identifier information is set to "1" in the case of -41 core network, and the network identifier information is set to "0" if the core network connected to the wireless network of the synchronous communication method is a GSM-MAP core network.

Thereafter, the control station in the synchronous radio network 110 transmits the sync channel message in which the network identifier information is inserted to the sync terminal 100 through the sync channel in step S14.

The synchronization terminal 100 receiving the synchronization channel message as described above extracts the following information elements from the received synchronization channel message and stores it in the memory.

a) Protocol Revision Level (8 bits)

b) Minimum Protocol Revision Level (8 bits)

c) System Identification (15 bits)

d) Network Identification (16 bits)

e) Pilot PN sequence offset index (9 bits)

f) Long code state information (LongCode State: 42 bits)

g) System time (36 bit)

h) Paging Channel data rate (2 bits)

i) Orthogonal transmit diversity mode information (2 bits)

j) Network Discriminator Information (Network Discriminator: 1 bit)

FIG. 8B is a flowchart illustrating a process of matching timing with a connected core network in a synchronous terminal receiving network classification information in the network interface method according to the present invention.

First, the synchronous terminal 100 turns on the power and then uses the algorithm provided by the terminal manufacturer and information such as the CDMA channel number, the CDMA region list, the SID list, and the NID list stored in the memory in step S21. Select your system.

In step S22, a pilot channel having the same CDMA channel number as the selected CDMA system is obtained. That is, after the terminal selects the CDMA system, the terminal acquires a pilot having the same CDMA channel number using the same CDMA channel number, that is, the CDMA frequency number.

After the terminal acquires a pilot channel, the process moves to step S23 to capture a sync channel. In step S24, a sync channel message obtained through the captured sync channel is received.

Next, in step S25, among the information elements of the sync channel message, the protocol revision level (8 bits), the minimum protocol revision level (8 bits), the system identification (15 bits), and the network recognition (Network Identification: 16 bits), Pilot PN sequence offset index (9 bits), Long Code State (42 bits), System time (System Time: 36 bits), Paging channel data Paging channel data rate (2 bits), orthogonal transmit diversity mode information (2 bits), and network identifier information (Network Discriminator: 1 bit) are extracted and stored in a memory.

After that, only the network identifier information element is extracted from the information elements stored in the memory in step S26, and the network type is recognized by searching for it. That is, if the network identifier information is set to "1", the connected core network is recognized as a synchronous ANSI-41 core network. If the network identifier information is set to "0", the connected core network is asynchronous GSM-. It is recognized as a MAP core network.

As a result of the recognition, when the network identifier is set to "0" and the connected core network is recognized as the GSM-MAP core network, in step S27, the synchronous terminal 100 selects the asynchronous CC 104 and the asynchronous MM 105. , Set the protocol accordingly. Thereafter, timing synchronization with the base station of the system selected in step S29 is achieved. In this way, the data interface with the asynchronous core network is possible in the synchronous terminal of the synchronous mobile communication system.

Next, when the recognition result network identifier is set to "1" and the connected core network is recognized as an ANSI-41 core network, in step S28, the synchronous terminal 100 synchronizes the synchronous CC 102 and the synchronous MM 103. Select and set the protocol accordingly. Thereafter, timing synchronization with the base station of the system selected in step S29 is achieved. In this case, the synchronous terminal of the synchronous mobile communication system interfaces with the synchronous core network as before.

According to the above-described "network interface method connected to a synchronous wireless network in a synchronous communication system", even if the core network is connected to any of the GSM-MAP network or ANSI-41 network smoothly with the core network to which the synchronous terminal is connected There is an advantage that can be linked.

In addition, by simply adding a new information element (network separator) without changing the information element of the synchronization channel message for the synchronization channel used in the synchronous mobile communication system using the existing synchronous wireless network, it is easily connected to the synchronous terminal in the synchronous wireless network. There is an advantage that can tell the type of core network.

In addition, there is an advantage that the synchronous system subscriber can use the service provided by the asynchronous GSM-MAP core network by the above effects.

Claims (6)

In the network interface method of a synchronous mobile communication system having a synchronous terminal and a synchronous wireless network, A first step of classifying a type of network connected from the control station in the synchronous wireless network, inserting the network identifier into a sync channel message, and transmitting the network identifier to the sync terminal through a sync channel; The synchronization terminal receiving the synchronization channel message transmitted from the synchronization wireless network, a) extracting a network separator inserted at a predetermined position of a sync channel message, b) recognize the type of core network connected to the synchronous wireless network according to the extracted network identifier; and c) a second step of setting a synchronous or asynchronous protocol so that a message interface can be made corresponding to the recognized core network. The method of claim 1, wherein the control station, A network interface method connected to a synchronous wireless network in a synchronous communication system, characterized in that the type of the connected network is determined using the information of a dip switch or a ROM during system initialization. The method of claim 1, wherein the control station, A network interface method connected to a synchronous wireless network in a synchronous communication system, characterized in that the type of the connected core network is determined by exchanging messages related to the operation core with the connected core network or signaling messages between the control station and the core network. . The method of claim 1, wherein the control station, After determining the type of the connected core network, if the connected core network is recognized as an ANSI-41 core network, the network identifier is set to "1". If the connected core network is recognized as a GSM-MAP core network, the network identifier is determined. Is set to "0", the network interface method connected to the synchronous wireless network in a synchronous communication system. The method of claim 1, wherein the synchronization terminal, If the network identifier extracted from the received sync channel message is "1", the connected core network is recognized as an ANSI-41 core network, and if the network identifier extracted from the received system guide message is "0", it is connected. A network interface method connected to a synchronous radio network in a synchronous communication system, characterized in that the core network is recognized as a GSM-MAP core network. The method of claim 1, wherein the synchronization terminal, If the network type recognized through the network identifier extracted from the synchronous channel message is an ANSI-41 core network, the current protocol state is maintained. If the recognized network type is GSM-MAP, the asynchronous protocol is activated to interface the asynchronous message. A network interface method connected to a synchronous wireless network in a synchronous communication system, characterized in that.