KR19980019779A - How to provide BISUP relay call - Google Patents

Abstract

The present invention relates to an asynchronous transfer mode (ATM) switching system, wherein a subscriber of a broadband integrated telecommunication network (B-ISDN) originating in another station requests a call with a subscriber of a broadband integrated telecommunication network in another country using a common line signaling method. By providing the call to the relay call originating from the relay switch, the common line signaling method NO. 7 indicates that it is necessary to meet the requirements of the broadband integrated telecommunication network in the signaling method. 7 Broadband Telecommunication Network User Part (BISUP) Signaling system allows the user to talk to or service a subscriber of the other broadband broadband telecommunication network by using the BISUP signaling system. 7 Signaling Broadband Telecommunication Network User Part (B-ISUP) By performing call setup for the call request, oscillating broadband telecommunication network subscribers of other countries have the effect of enabling subscribers and services of the broadband telecommunication network subscribers of other countries.

Description

How to provide BISUP relay call

1 is an overall structure diagram of an asynchronous transfer mode (ATM) virtual channel (VC) switch according to the present invention.

2 is a block diagram of a main block for performing relay call processing in an asynchronous transmission mode (ATM) virtual channel (VC) switching system according to the present invention.

3a to 3g is a flow chart for providing a broadband integrated information network user unit (BISUP) relay call in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

100: Asynchronous Transfer Mode Local Switching Subsystem (ALS / T)

101: Asynchronous transfer mode switch line block (ASLH)

102: access switch network module (ASNM)

103: call connection control processor (CCCP)

104: trunk line connection module (TIM)

105: broadband signal access block (BSIF)

106: trunk line service designation adjustment block (TSCF)

107: message transmitter 3 signal message processing block (SMHF)

108: Network Protocol Connection Block (NPIF)

109: Network connection resource processing block (NLRHF)

110: switch connection resource processing block (SLRHF)

111: Asynchronous transfer mode local switching translation control block (NTLF)

112: network protocol control block NPCF)

200: interworking switching subsystem / analog subscriber (IWS / S)

201: Asynchronous Transfer Mode Interworking Module (AIWM)

202: time switch module (TSWM)

203: analog line access module (ALAM)

204Signal Service Module (SSM)

205: analog access switching module (AASM)

300: Asynchronous Transfer Mode Central Switching Subsystem (ACS)

301: Asynchronous transfer mode switch line block (ASLH)

302: Interconnect Switch Network Module (ISNM)

303: operation maintenance processor (OMP)

304: Asynchronous Transfer Mode Central Switching Subsystem Translation Number Control Block (NTCF)

305: Routing control block (RTCF)

400: Intermodule Interface (IMI)

The present invention relates to an asynchronous transmission mode (ATM), and in particular, the subscriber of a broadband integrated services digital network (B-ISDN) originating in another station has a common line signaling method No. 7 BISDN User Part (No. 7 BISUP) Signaling method is used when calling with a subscriber of B-ISDN of another country using signaling method and outgoing from transit exchange. It is to provide a call providing method for the relay call.

In the past, the evolution of a communication network from a narrowband Integrated Information Network (Narrowband-ISDN) to a Broadband Integrated Information Network (B-ISDN) has been made. Countries around the world are interested in developing an Asynchronous Transfer Mode (ATM) exchange system. I was concentrating.

However, according to the evolution of the network, the common line signaling method No. 7 ISDN User Part (No. 7 ISUP) needs to meet the requirements of B-ISDN in signaling.

Therefore, the present invention proposed in the above solution, the outgoing broadband integrated telecommunications network (B-ISDN) subscribers of the other station by performing the relay line call control for the broadband integrated information communication network (B-ISDN) subscribers. 7 The purpose of this service is to make a call or service available to subscribers of BISDN of other countries by using No. 7 BISUP signaling method.

In order to achieve the above object, when it is determined that an outgoing call addressed to another station is received in response to a call request from an originating subscriber of another station in an asynchronous transmission mode (ATM) virtual channel (VC) switching system, It is characterized in that it provides a broadband integrated information network user unit (BISUP) relay call signal to make a call setup.

Therefore, when an initial address message (IAM) is received from an originating exchange system of another station, the message is analyzed and a band and switch link path suitable for a cell rate required by an originating subscriber of another station are analyzed. Set and send an initial address message (IAM) to the destination exchange system of another station.

In response to the above, an initial address message (IAM) is received. At this time, routing tag information of a cell header is transmitted to a related block to perform routing for transmission of a user data cell.

When the address complete message (ACM) is received from the destination exchange system of the other station according to the above, the address exchange complete message (ACM) is transmitted to the originating exchange system of the other station, and the response message is received from the destination exchange system of the other station. When receiving (Answer Message, ANM), an answer message (ANM) is transmitted to the originating exchange system of another station, where the status of the incoming / outgoing call is transferred to the busy state.

In addition, due to the caller's RELEASE request by the calling party or the called party, the call is performed the recovery procedure, and the request for the return of the band and the switch connection path in use and the deletion of the routing selection information are performed.

Hereinafter, described in detail with reference to the accompanying drawings.

1 is an overall structural diagram of an asynchronous transfer mode (ATM) virtual channel (VC) switch according to the present invention.

In view of the above structure, the asynchronous transfer mode (ATM) switching system is basically an asynchronous transfer mode local switching subsystem (ALS) and an asynchronous transfer mode central switching subsystem (ACS), 2 It consists of three subsystems.

The Asynchronous Transfer Mode Subsystem (ALS) may operate as a Concentrator having a constant concentration ratio together with the Asynchronous Transfer Mode Central Switching Subsystem (ACS) 300.

Thus, the asynchronous transmission mode central switching subsystem (ACS) 300 operates as a distribution device that performs the interconnection function between the asynchronous transmission mode local switching subsystem (ALS).

In addition, the asynchronous transmission mode local switching subsystem (ALS) is asynchronous for network matching with the access switching subsystem / Broadband Integrated Services Digital Network (ALS / BISDN Subscriber, ALS / S) for user matching of Broadband Integrated Services Digital Network (BISDN). Transmission Mode Local Switching Subsystem / Wideband Telecommunications Trunk Line (ALS / BISDN Trunk, ALS / T) (100) and Connection Switching Subsystem / Wideband Telecommunication Network Subscriber and Relay Line (ALS / BISDN) Subscriber and Trunk, ALS / ST).

As a concentrator according to the above, the connection switching subsystem / broadband integrated information network subscriber (ALS / S) has n (155 Mbps reference) of user-side links and n of switches (central switching subsystem (ACS))-side links. It can have a condensation ratio of * m.

Therefore, the Asynchronous Transmission Mode Central Switching Subsystem (ACS) 300 performs the translation of the called number for internal calls and incoming calls during call / connection control, and for outgoing or relay calls, the path for each relay line. (route) Perform control.

In addition, the asynchronous transmission mode central switching subsystem (ACS) 300 has an operation maintenance boss processor (OMP) 303 for the operation and maintenance of the entire system, system-level maintenance, testing, measurement and It performs various input / output control functions with the operator as well as the statistics function.

At this time, the relay asynchronous transmission mode (ATM) switching system is asynchronous transmission mode local switching subsystem / relay line (ALS) without a subscriber connected to the switching system, i.e. without an access switching subsystem / broadband integrated information network subscriber (ALS / S) module. / T) 100 and the Central Exchange Subsystem (ACS) 300 module only.

FIG. 2 is a block diagram of a main block for performing relay call processing in an asynchronous transmission mode (ATM) virtual channel (VC) switching system according to the present invention. The entire call control procedure will be described with reference to FIG. Same as

When a call request occurs from an originating exchange system of another station, the asynchronous transmission mode local exchange subsystem (ALS) detects this and performs call service. The routing subsystem (ACS) 300 makes a routing request.

The asynchronous transmission mode central switching subsystem (ACS) 300 receiving the above routing request designates an incoming asynchronous transmission mode local switching subsystem (ALS).

The designated Asynchronous Transfer Mode Local Switching Subsystem (ALS) selects the optimal path, notifies the Outgoing Asynchronous Transfer Mode Local Switching Subsystem (ALS), and makes a call setup request to the destination exchange system of another station. An exchange subsystem (ALS) establishes a currency path.

At this time, the outgoing asynchronous transmission mode local switching subsystem (ALS) counts the cells delivered during the call, and sends the billing data to the asynchronous transmission mode central switching subsystem (ACS) 300 together with the user requested service type after the completion of the call. The originating / receiving asynchronous transmission mode local exchange subsystem (ALS) recovers call data to a dormant state.

2 is a block diagram illustrating a main call processing block for performing the call control procedure as described above, and description of each block is as follows.

First, the system library block includes a switch link resource handling (SLRHF) 110, an asynchronous transmission mode local exchange subsystem translation number control block (111), NNI Link Resources Handling (NLRHF) 109.

The switch connection resource processing block 110 is a block for generating switch control and routing tag of a cell header, and the asynchronous transmission mode local exchange subsystem translation control block 111 is a station number. Block for translation.

The network connection resource processing block 109 is a system library block for managing a network node interface (NNI) resource.

In addition, the Broadband Signaling Interface (BSIF) 105 functions to control and manage a signaling connection for reliable transmission of B-ISDN call control messages. .

The trunk service specific coordination block (TSCF) 106 performs a function of adjusting the signal protocol for the network node interface to the service of the broadband signal access block 105.

In addition, the message transmitter 3 signaling message handling block (MTP-3 signaling message handling (SMHF)) 107 is NO. 7 This block performs the function of Message Transmitter 3 (MTP-3).

The following network protocol access block (NNI Protocol Interface) performs the message matching unit 3 (MTP-3) and user interface matching function of the broadband integrated information network (B-ISDN), and the network node interface protocol control block (NNI Protocol Control, NPCF) 112 performs B-ISDN user code control.

And a routing control block (RTCF) 305 for routing control.

3A to 3G are flowcharts for providing a broadband integrated information network user unit (BISUP) relay call according to the present invention.

Referring to the detailed relay call control procedure with reference to the drawings as follows.

3A illustrates a procedure of creating a child process for performing relay calls in the main process of the network protocol control block (NPCF) 112.

3b to 3g illustrate a call providing procedure of the outgoing relay line call processing process (NPCF_ogt) generated by the NPCF main process.

In the above procedure, the incoming trunk line call processing process (NPCF_ict), which first received the initial address message (IAM) that was the call request message from the switching system of the originating foreign station, analyzed the initial address message (IAM), If it turns out to be a relay call, it passes an internal message, LAM_int (1), to the main process of the network protocol control block (NPCF) 112.

After receiving the internal message, the main process examines the network resource to be used, and if the resource is available, creates a relay relay call processing process (2) and allocates the network resource.

Here, a child process for BISUP relay call processing will be described as NPCF_ogt.

After allocating the network resource and checking the call resource, if it is not available, the NPCF main process removes the initial address message to the incoming trunk line call processing process (NPCF_ict) (3). Address Message Reject internal, LAR_int) to notify that the call request failed.

At this time, the main process transitions to the idle state 4 and transitions to a message reception waiting state for another call request.

After the above transition, the subprocess NPCF_ogt for processing the user part relay call of the broadband integrated information communication network is the result of the switch connection resource processing block (SLRHF) 110 called using the switch information included in the internal message IAM_int message. Determine the optimal switch path (internal routing information).

At this time, if the result of the switch routing for the outgoing call (5) is successful, the initial address message accept internal (IAA_int) (6) message is notified to the NPCF_ict and the procedure of IAM_req (7) is performed. If the switch path fails, the IAR_int message is transmitted to NPCF_ict, the allocated network resource is released, and the child process (NPCF_ogt) for processing the user part relay call of the broadband integrated telecommunication network is terminated.

After transmitting the initial address message (IAM) to the exchange of the other station, the child process (NPCF_ogt) for processing the user part relay call of the broadband integrated telecommunication network is Await_IAA (IAM), which is waiting for the initial address message (IAM). Transition to Accept.

At this time, in the Await_IAA state, the child process NPCF_ogt for processing the user part relay call of the broadband integrated information communication network receives the IAA_ind message (8).

In addition, the child process (NPCF_ogt) for processing the relay call of the user part of the broadband integrated telecommunication network includes connection information (virtual path identifier / virtual channel identifier (VPI / VCI) allocated by the trunk interface module controller (TIMC). PtP_ConnEstabRQ and PtP_NPCInformation message, which includes internal routing information and Network Parameter Control (NPC) information (9), and then transition to the Await_ACM state that receives the PtP_Conn EstabRP message.

After receiving the ACM_ind message from the exchange of the other station (10), the child process (NPCF_ogt) for processing the user part relay call of the broadband integrated information communication network transfers the message to the NPCF_ict and transitions to the Await_ANM state.

In addition, the child process (NPCF_ogt) for receiving the ANM_ind message from the switching terminal of the other station (11) transmits the ANM_int message to the NPCF_ict and transitions to a conversation state.

Next, the call recovery procedure may be performed according to the request of the calling / receiving subscriber. If the calling subscriber first seeks recovery (12), a child process (NPCF_ogt) for processing the user part relay call of the broadband integrated information communication network (12). Receives a REL_int message from NPCF_ict.

When the called subscriber first requests recovery, the receiving subscriber receives the REL_ing message from the exchange of the power as shown in (18).

First, in the busy state, the child process NPCF_ogt for processing the user part relay call of the broadband integrated information communication network (12) starts the call recovery procedure when receiving the REL_int message from the NPCF_int (12).

In order to release the call, the child process (NPCF_ogt) for processing the user part relay call of the broadband integrated information communication network releases the internal switch link by calling the L_SwLinkRel library of the switch connection resource processing block (SLRHF) 110 (19). ).

In addition, the PtP_ConnDelRQ message is transmitted to the trunk line connection module controller (TIMC) 14 in order to delete the connection identifier, and in response, the PtP_ConnDelRP message is received.

The RtBwReleaseRQ message is transmitted to the routing control block (RTCF) 305 to delete the route band allocated to the calling outgoing call (15).

At this time, the child process (NPCF_ogt) for processing the relay call of the broadband integrated information communication network user part transmits the REL_req message to the exchange of the receiving station (16) and transitions to the release complete state (Release Complete, Await_RLC), which is waiting for a call recovery completion message. .

In the Await_RLC state, the child processor NPCF_ogt for processing the user part relay call of the broadband integrated information communication network terminates after receiving the RLC_ing message (17).

In the busy state, the child process (NPCF_ogt) for processing the user part relay call of the broadband integrated telecommunication network starts the call recovery procedure when the REL_ind message is received from the exchange of the other station.

Then, the procedure (13), (14), and (15) is performed again, and the REL_int message is transmitted to NPCF_ict (20).

After the above message is delivered, the RLC_req message is delivered to the exchange 21 of the other station in response to the REL_ind message and then terminated.

As described above, the method for providing a relay call may provide a BSIUP relay call by performing a call control procedure for a call relayed at a relay exchange by a call control procedure. It has the effect of providing the service to the called party of the receiving country in response to the BISDN service request from the BISDN subscriber of the other country.

Claims (6)

Broadband Telecommunications Network User Unit that determines the incoming call to the other station in response to the call request from the originating subscriber of the other station in the asynchronous transmission mode (ATM) virtual channel (VC) switching system. BISUP) method for providing relay call, A first step of analyzing a message received from an originating exchange system of another station and transmitting it to the destination exchange system of another station; A second step of setting a path for transmission of a user data cell by transmitting routing information of a cell header of a message received from the first step to a related block; A third step of transmitting the received message to the originating exchange system of the other station when the address reception completion message is received from the destination exchange system of the other station after performing the second step; After receiving the response message from the destination exchange system of the other station after performing the third step, transmitting the message received to the originating exchange system of the other station to make the status of the incoming / outgoing call busy; A fifth step of performing a procedure of recovering the call in response to a call recovery request of the calling party or the called party after performing the fourth step; And a sixth step of performing the return of the band and switch connection paths used for the call recovery and the deletion of the routing designation information after the fifth step. How to Provide. The method of claim 1, wherein the first step Broadband Telecommunication Network, characterized by forwarding internal message to the main process of network protocol control block that the requested call turns out to be a relay call as a result of analyzing the initial address message which is the call request message from the originating exchange system How to provide BISUP relay call. The method of claim 1, wherein the second step A user of a broadband integrated telecommunications network, which determines an optimal switch path that is a result of a called switch connection resource processing block using switch information included in a message of a child process for processing a broadband integrated telecommunications network user part (BISUP). How to provide BISUP relay call. The method of claim 1, wherein the fourth step Broadband Telecommunications Network (NPCF_ogt), which receives the ANM_ind message from the other station's exchange, forwards the message received by NPCF_ict and transitions to the busy state. How to provide BISUP relay call. The method of claim 1, wherein the fifth step Broadband Telecommunication Network User Part (NPCF_ogt) Receives a REL_ind message from an exchange of another station. BISUP) How to provide relay call. The method of claim 1, wherein the sixth step A method for providing a Broadband Integrated Services Telecommunications User Interface (BISUP) relay call, comprising: transmitting a RtBwReleaseRQ message to a routing control block to delete a route band allocated to an outgoing call in a call.