KR100316842B1 - Method for processing singaling between moblle switch center and public switched telephone network/integrated services digital network - Google Patents

Abstract

The present invention relates to a method for interworking between a mobile switch center (MSC) and a public switched telephone network (PSTN) / integrated services digital (ISDN) in a next generation mobile communication network. In the MSC 1 of the present invention, the processor 12 performs call processing such as number translation when a call from the PSTN / ISDN network 3 originates, and cell switching by allocating exchanger resources when the next-generation mobile communication network responds to paging. Register with the / decoding unit 11, and control the internal ATM switch to mediate a call between the PSTN / ISDN network 3 and the next generation mobile communication network through the registered resource when the terminal of the next generation mobile communication network is hooked off. In addition, the MSC 1 of the present invention allocates resources of the called party when a call originates from the next-generation mobile communication network, and transmits an initial request message (IAM) to the PSTN / ISDN network 3, and a request completion message (Address). When Comolete Message (ACM) is transmitted from PSTN / ISDN network 3, when the terminal of PSTN / ISDN network 3 is hooked off after registering the allocated resource, PSTN / ISDN is registered through the resources registered in the internal ATM switch. Control to arbitrate call between network (3) and next generation mobile communication network

As described above, in the present invention, signaling processing between the MSC having the ATM switch and the PSTN / ISDN network is possible, and thus, the ATM switch and the PSTN / ISDN network can be interoperated with each other.

Description

Signaling processing method between next-generation mobile network and public switched telephone network / service integrated digital network

The present invention relates to a method for interworking between a mobile switch center (MSC) and a public switched telephone network (PSTN) / integrated services digital network (ISDN) of a next-generation mobile communication network. More particularly, the present invention relates to a signaling processing method between a next generation mobile communication network and a PSTN / ISDN network for mediating communication between them.

As an implementation method of the next generation mobile communication network, an asynchronous transfer mode (ATM) method has been proposed. In ATM, high-speed switching is possible by switching cells in hardware using VPI / VCI in the header. Apart from this, in the PSTN / ISDN network which is widely used now, a method of exchanging information by setting a switching path in advance by using a separate signaling signal is adopted.

On the other hand, in the next generation mobile communication network employing the ATM method, the MSC to mediate communication is implemented as an ATM switch. Although the MSC needs to interwork with a PSTN / ISDN network, a method for controlling switching of an ATM switch in the MSC using signaling of the PSTN / ISDN network has not been proposed. That is, in order to interwork an ATM switch with a PSTN / ISDN network, ATM cells are converted into information from / to a PATN / ISDN network, and in these cells, a virtual pass identifier (VPI) / virtual channel identifier corresponding to signaling is used. (Virtual Channel Identifier: VCI) header information should be inserted, but conventionally, a signaling processing method between the MSC and the PSTN / ISDN network has not been proposed. In order to ATM information into / from the PSTN / ISDN network, conventionally, instead of signaling, an operator of an ATM exchanger generates a separate virtual circuit (PVC) in the exchange by applying a separate MMC (Man Muchine Command) command. Although the method is used, this method has a problem that it is extremely practical in that it requires operator control.

An object of the present invention is to provide a signaling processing method between a next generation mobile communication network and a PSTN / ISDN network capable of interworking an MSC and a PSTN / ISDN network of a next generation mobile communication network.

In order to achieve this object, the present invention is provided with an Asynchronous Transfer Mode (ATM) switch and provided from a Public Switched Telephone Network (PSTN) / Integrated Services Digital (ISDN) network. A method of driving a mobile switch center (MSC) for forwarding outgoing calls to a next-generation mobile communication network, according to channel information included in an initial address message (IAM) from a PSTN / ISDN network. Determining whether the corresponding channel is in use; If the channel is not in use, generating a profile of the called subscriber using information in the IAM and performing call processing; Requesting paging for the called subscriber in the next-generation mobile communication network according to the called subscriber profile, and transmitting a request completion message (ACM) to the PSTN / ISDN network; Allocating a resource for an incoming / outgoing call if a paging response is notified of the paging request; Registering the allocated resource with the ATM switch; Providing a response message (Answear: ANM message) to the calling exchange when the hooking off signal is provided from the called terminal of the called exchange, and controlling the ATM switch to arbitrate the call of the calling party and the called party with the registered allocation resource; It is provided.

Mobile communication with an Asynchronous Transfer Mode (ATM) switch and forwarding calls from the next-generation mobile network to the Public Switched Telephone Network (PSTN) / Integrated Services Digital (ISDN) network. A method of driving a mobile switch center (MSC), the method comprising: allocating a resource for a calling party by using information included in a call setup request message from a next generation mobile communication network and notifying the next generation mobile communication network; In response to the notification, when the next-generation mobile communication network responds, allocating resources for a called party and transmitting an initial address message (IAM) to a PSTN / ISDN network; If an address completion message (ACM) indicating receipt of an IAM is transmitted from a PSTN / ISDN network, registering the allocated resource with an ATM switch; After the allocation resource is set in the ATM switch, if the response message that the terminal is hooked off from the PSTN / ISDN network is transmitted, the ATM switch comprises controlling to arbitrate the call between the calling party and the called layer according to the set resource.

1 is a diagram illustrating a state in which a next generation mobile communication network and a public switched telephone network / integrated information communication network are connected through a mobile communication switch;

2 is a flowchart illustrating a case where a call is transmitted in a public switched telephone network / service integrated digital network in a signaling processing method between a next-generation mobile communication network and a public switched telephone network / service integrated digital network according to the present invention;

3 is a flowchart illustrating a case where a call is transmitted in a next generation mobile communication network in a signaling processing method between a next generation mobile communication network and a public switched telephone network / service integrated digital network according to the present invention;

<Description of the symbols for the main parts of the drawings>

1 mobile communication switch 2 wireless network control unit

3: PSTN / ISDN network 11: Cell coding / decoding unit

12: processor

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a schematic block diagram of a system for performing a signaling processing method capable of interworking between an MSC of a next generation mobile communication network and a PSTN / ISDN network according to the present invention, wherein the MSC 1 of the next generation mobile communication network is implemented as an ATM switch.

As shown, the MSC 1 is connected to a Radio Network Controller (RNC) 2 through a trunk interface module (TIM), and the RNC 2 is connected to the MSC 1 and the base station (TNC). Mediates communication between base stations (B1-Bn). Here, communication is performed between the MSC 1 and the RNC 2 by the ATM method.

The MSC 1 is also connected to the PSTN / ISDN network 3 to mediate the communication between these networks 3 and the RNC 2. Here, the network of the PSTN / ISDN (3) transmits information in units of channels, not ATM cells, differently from the MSC (1), so that the MSC (1) is between the PSTN / ISDN network (3) and the RNC (2). In order to mediate communication, it is necessary to decode ATM cells for each channel and output the information, and to input the information input for each channel into ATM cells. To this end, the cell coding / decoding unit 11 is configured in the MSC 1.

On the other hand, in order for the MSC 1 to mediate communication between the RNC 2 and the PSTN / ISDN network 3, the MSC, that is, ATM exchange according to the signaling from the RNC 2 and the signaling from the PSTN / ISDN network 3, may be used. It is necessary to allocate resources on board properly and to mediate their information accordingly.

The MSC 1 performs the above-described process while transmitting and receiving signaling with the RNC 2 and the PSTN / ISDN network 3, which are illustrated in FIGS. 2 and 3.

2 is a case where the PSTN / ISDN network 3 is the calling party, and FIG. 3 is a case where the RNC 2 is the calling party, and the PSTN / ISDN network 2 and the MSC 1 are ISUP (ISDN User Part) signaling. Use

In other words, when the PSTN / ISDN network 3 becomes the calling party, the PSTN / ISDN network 3 provides an initial address message (IAM) message to the MSC 1. The IAM message includes the number of the called terminal and channel information to be used in the PSTN / ISDN network 1.

When the IAM message is received in step 101, the processor 12 in the MSC 1 reads the usage channel information in the IAM message and determines whether the corresponding channel is currently in use (102, 103). If the channel is currently in use, communication is not possible through this channel. Therefore, the processor 12 proceeds to step 104 to release the call and terminates all processes. Proceed to 105.

In step 105, the processor 12 performs a call processing procedure such as number translation using information in the IAM to receive the called subscriber information and the location information from a home location register (HLR) (not shown), thereby obtaining the profile of the called subscriber. Create

Thereafter, the processor 12 requests the paging of the called subscriber to the RNC 2 (106), and transmits a request completion message (ACM) to the PSTN / ISDN network 3 (106). When the paging response is notified of the paging request in step 106 (107), the processor 12 allocates to the originating exchange resources such as VPI / VCI values and bandwidth and switching paths between origination and destination. The processor 12 also allocates 108 the VPI / VCI value and bandwidth for the called party and the switch path between the called party.

When this resource allocation process is finished (108), the processor 12 notifies the called party, i.e., the RNC 2, of the resource allocation condition, and if the RNC 2 responds to the notification (109), the resource allocation condition is counted. Registration in the coding / decoding section 11 enables the cell coding / decoding section 11 to encode / decode the ATM cell (110).

In this way, if the connection signal indicating that the mobile terminal from the RNC 2 is hooked off after registering the exchange resource to the cell coding / decoding unit 11 (111), the processor 12 sends a response message (Answear: ANM). By transmitting to the PSTN / ISDN network 3, which is the calling party, it notifies that communication with the called terminal is possible (112).

In step 112, all signaling procedures are terminated and a call procedure is performed (113). In the call process 113, the ATM cell from the RNC 2 is switched through a signal (not shown) to be provided to the cell coding / decoding section 11, and the cell coding / decoding section 11 is internal memory as described above. The ATM cell is decoded using the resources allocated to and transmitted on the corresponding channel. Similarly, the channel-specific information of the PSRN / ISDN network 3 is ATM cellized according to the memory-stored allocated resources of the cell coding / decoding unit 11 and then provided to the RNC 2 through an internal switch. That is, communication between the mobile terminal connected to the base stations BS1-BSn and the terminals of the PSTN / ISDN network 3 is possible through the call process.

This call process 113 is terminated because the call release message, that is, the signal that the terminal is hooked off is provided to the PSTN / ISDN network 3 or the RNC 2 (114, 115). That is, when the call release message is transmitted, the processor 12 terminates all processes by performing the call release procedure.

3 shows a case where the RNC 2, i.e., the next generation mobile communication network, becomes the calling party. When the next generation mobile communication network is the calling party, the RNC 2 sends a call establishment request message to the processor 12. When the call setup request message is received (201), the processor 12 allocates the VPI, the VCI, and the bandwidth for the calling party, that is, the PSTN / ISDN network 3, and transmits it to the calling party (202), and responds from the calling party. A call processing procedure, such as number translation, is performed (2030) to allocate exchange resources such as occupancy of the appropriate relay line to the called party and VPI / VCI values, bandwidth, and switching path between originating calls (204).

When the above-described exchange resource allocation process is completed (205), the processor 12 transmits the IAM to the PSTN / ISDN network 3 of the called party (206). The PSTN / ISDN network 3 transmits an ACM message in response to this IAM, and the processor 12, when ACM is authorized (207), the subscriber-specific exchange resources (VPI, VCI, By registering information such as bandwidth) into the cell coding / decoding unit 11, the cell coding / decoding unit 11 can code / decode an ATM cell with the registered resource (208).

After registering the exchange resource in the cell coding / decoding unit 11 as described above, the processor 12 notifies the RNC 2 that the called party, that is, the PSTN / ISDN network 3 has responded to the call setup (ACM). The RNC 2 is notified that the call is available (209).

The PSTN / ISDN network 3 generates an ANM message as a signal for notifying when the called terminal is hooked off and provides it to the processor 12, and the processor 12 is in a state in which communication with the called terminal is enabled by the ANM. Detect (210).

In step 210, all signaling processes are terminated and the call process is performed. In the call process 211, the ATM cell from the RNC 2 is switched through a switch (not shown) to the cell coding / decoding unit 11. As described above, the cell coding / decoding unit 11 decodes the ATM cell using the resources allocated to the internal memory and transmits the same to the corresponding channel. Similarly, the channel-specific information of the PSRN / ISDN network 3 is ATM cellized according to the memory-stored allocated resources of the cell coding / decoding unit 11 and then provided to the RNC 2 through an internal switch. That is, communication between the mobile terminal connected to the base stations BS1-BSn and the terminals of the PSTN / ISDN network 3 is possible through the call process.

The call process 211 ends 212 and 213 because a release message from the PSTN / ISDN 3 or the RNC 2 is provided, that is, a signal indicating that the corresponding terminal is hooked off. That is, when the release message is transmitted, the processor 12 terminates all processes by performing a call release procedure.

As described above, in the present invention, signaling processing between the MSC having the ATM switch and the PSTN / ISDN network is possible, and thus, the next generation mobile communication network and the PSTN / ISDN network can be interoperated with each other.

Claims (2)

Equipped with an Asynchronous Transfer Mode (ATM) switch, it allows outgoing calls from Public Switched Telephone Network (PSTN) / Integrated Services Digital (ISDN) networks to reach next-generation mobile networks. As a method of driving a mobile switch center (hereinafter referred to as MSC), Determining whether a corresponding channel is in use according to channel information included in an initial address message (IAM) from the PSTN / ISDN network; If the corresponding channel is not in use, generating a profile of a called subscriber using information in the IAM and performing call processing; Requesting paging for the called subscriber to the next-generation mobile communication network according to the called subscriber profile, and transmitting a request completion message (ACM) to the PSTN / ISDN network; Allocating resources for an originating call when a paging response to the paging request is notified; Registering the allocated resource with the ATM switch; When a hooking-off signal is provided from the called terminal of the called exchange, a response message (Answear: ANM) is provided to the calling exchange, and the ATM switch arbitrates the call of the calling party and the called party with the registered allocated resource. A signaling processing method between a next-generation mobile telecommunication network and a public switched telephone network / service integrated digital network, which comprises a step of controlling the digital network. Mobile communication with an Asynchronous Transfer Mode (ATM) switch and forwarding calls from the next-generation mobile network to the Public Switched Telephone Network (PSTN) / Integrated Services Digital (ISDN) network. As a method of driving a mobile switch center (MSC), Allocating a resource for a calling party using information included in a call setup request message from the next generation mobile communication network and notifying the next generation mobile communication network; Allocating resources for a called party when the next-generation mobile communication network responds in response to the notification, and transmitting an initial address message (IAM) to the PSTN / ISDN network; Registering an allocated resource with the ATM switch when a request completion message (ACM) indicating the reception of the IAM is transmitted from the PSTN / ISDN network; Controlling the ATM switch to mediate a call between the calling party and the called party according to the set resource when a response message indicating that the terminal is hooked off from the PSTN / ISDN network is transmitted after setting the allocated resource to the ATM switch; Signaling processing method between a next-generation mobile communication network and a public switched telephone network / service integrated digital network having a.