KR100249856B1 - A subscriber call control method for internet access service in tdx-10 isdn - Google Patents

Abstract

The present invention relates to a subscriber call control method for establishing and maintaining a call path between an ISDN subscriber and an Internet service provider so that Internet traffic can be routed inside an electronic switchboard. Create a child processor for the mobile station, request the relay line link status check from the generated child processor to the block in charge of the Internet traffic routing function, receive and process the relay line status check notification signal from the requested block, and transmit the Internet traffic. To connect the fixed line to the call and to initiate the PPP connection establishment, send the Internet connection call establishment request signal to the block in charge of the Internet connection of the subscriber and wait for a response, and notify the completion of the Internet connection call establishment from the requested block. Take a signal After waiting for the PPP connection establishment completion signal, and receiving the PPP connection establishment completion signal from the requested block, provides a subscriber call control method for all electronic Internet access service to maintain the assigned line state to enable Internet traffic communication By doing so, there is an effect of providing a base for providing a high-speed and low-cost Internet access service to subscribers who want to receive the Internet service.

Description

Subscriber Call Control Method for Internet Access Service of Electronic Switching System

The present invention is to provide a method for accessing the Internet by configuring a package separately by adding a subsystem for providing an Internet access service to a TDX-10 Integrated Services Digital Network (TDX-10) switch. To apply the packet transmission method used to the circuit-switched switch, a Point-to-Point Protocol (PPP) is performed during the exchange with the subscriber, assigning each subscriber an Internet address for Internet access. In exchange, the exchange performs the incoming function that the Internet Service Provider (ISP) that the subscriber wants to access to perform the transmission function, and sets the fixed line, that is, the call path, to the subscriber and transmits the Internet traffic. It is about how to do it.

Recently, the social interest in the Internet is rising and gradually spreading in real life. In the case of foreign exchange exchange traffic analysis, Internet access traffic is much longer than telephone traffic, and usage is gradually increased. Therefore, it is necessary to implement the Internet traffic routing function inside the electronic exchange. In addition, the existing Internet connection through a dedicated line has a variety of speeds, but the user burden is high due to the high communication charges, and there is a problem that the connection speed is significantly slower in the case of a low cost in the case of a connection via a modem.

The present invention has been made to solve the problems of the prior art, a method for providing a subscriber call control procedure for realizing the Internet traffic routing function to the electronic switching center, the internal communication path to the exchange to handle the high-speed Internet traffic It provides the function to maintain the link information and to maintain the set call path during the Internet access and the method of allocating the Internet address through the PPP connection setting request, so as to reduce the communication cost and speed up the Internet access. The purpose is to.

1 is a block diagram of a subsystem and a block diagram of an all-electronic exchanger to which the present invention is applied;

2 is a block diagram of an Internet subscriber access control subsystem of FIG. 1;

3 is a subscriber call processing procedure for an Internet access service according to the present invention;

4 is an overall subscriber call processing flowchart for an internet access service according to the present invention;

5 is a processing flowchart for generating a child process by the main process of FIG. 4;

6 is a process flow diagram for Internet access by the ruler process of FIG. 4;

7 is a process flowchart for requesting a relay line link status of FIG. 6;

8 is a flowchart illustrating a process of receiving a relay line state confirmation notification signal and transmitting an internet access call setup request signal of FIG. 6;

9 is a flowchart illustrating a process of receiving an Internet access call setup complete notification signal and a PPP connection setup complete signal waiting diagram of FIG. 6;

FIG. 10 is a process flowchart for receiving a PPP connection establishment completion signal and maintaining line state of FIG. 6; FIG.

<Explanation of symbols for main parts of drawing>

10: analog subscriber access subsystem

20: digital subscriber access subsystem 21: digital subscriber matching block

22: digital subscriber call control block

30: packet subscriber access subsystem 40: interconnect subsystem

41: number translation block 42: switch control block

50: central control subsystem 60: trunk line connection subsystem

70: No.7 connection subsystem

100: Internet subscriber access subsystem 101: time switch

102: subscriber registration board 103: high-speed IPC network

104: relay line registration board 105: time switch processor

106: subscriber matching processor 107: relay line matching processor

108: IPC network

109: Internet access signal processing processor

The present invention relates to a method for overcoming a difference in a transmission method between a circuit transmission based electronic switch and a packet transmission based internet service. In particular, the present invention relates to an ISDN subscriber and the Internet for routing Internet traffic inside an electronic switching center. The present invention relates to a subscriber call control method for establishing and maintaining a call path between service providers.

Since the ISDN subscriber's Internet access request is made using a special number assigned in advance, if the incoming number translation result is found to be the Internet access request number in the number translation block, the Internet subscriber access call setup request signal is transmitted to the Internet subscriber call control block. The control procedure is initiated. The Internet subscriber call control block allocates one child process for each call establishment request signal to allocate and maintain a fixed call path for each subscriber while performing the incoming call control function required to interwork with the existing ISDN subscriber call control block. When the disconnection signal is received, the process of releasing the assigned channel is released.

Hereinafter, a subscriber call control method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a subsystem and a block diagram of an electronic switching system to which the present invention is applied, and an analog subscriber access subsystem (ASS) 10 for accommodating and processing analog subscribers, and connected with a digital subscriber. A Digital Subscriber Access Subsystem (ASS) 20 for processing a packet, a Packet Subscriber Access Subsystem (ASS) for processing a packet subscriber, an ASS, a CCS, and An Interconnection Network Subsystem (INS) that provides ASS interconnection, a Central Control Subsystem (CCS) 50 that controls, operates, and maintains the system; A trunk line connection subsystem (Access Switching Subsystem-Trunk) 60 in charge of relay call processing to the exchange, and a No.7 connection subsystem (Access Switching Subsystem-No. 7) for processing common line No. 7 signals ( 70) and an Access Switching Subsystem (Internet) 100 for an Internet access service.

In this case, the digital subscriber access subsystem (ASS) 20 is a digital subscriber matching block 21 for matching with a subscriber requesting Internet access and a subscriber-side outgoing call requesting Internet access. It consists of a digital subscriber call control block 22 for controlling, and the Interconnection Network Subsystem (INS) 40 is a number translation block 41 and each sub for translating a called number to set up an incoming call. And a switch control block 42 for handling the time switch of the system and the space switch connection of the interconnect subsystem, wherein the Access Switching Subsystem-Internet 100 is an incoming call control function on behalf of the ISP. Internet Subscriber Call Control Block (110) in charge of the Internet, and Internet Routing in charge of Internet traffic routing processing Air consists of a block (Internet Routing Call Control) (120), and Internet subscribers Internet access control block (Subscriber's Internet Access Control) (130) that is responsible for communication with subscriber board.

Looking at the operation of the electro-electric exchanger configured as described above are as follows.

First, when a subscriber matched to each subscriber access subsystem 10, 20, 30 dials a called number to request a call connection, the number translation block 41 requests a number translation from the call control block of each subsystem, The call is forwarded to the corresponding subsystem according to the result of the number translation, and when the incoming call is answered by setting up a call path between the originating and the incoming through the switch control block 42, voice and data transmission between the originating / incoming call are possible.

FIG. 2 is a block diagram of an internet subscriber access control subsystem of FIG. 1 and illustrates an internal exchange path of an exchange established through an internet subscriber access subsystem structure and an internet access service subscriber call control procedure. The T-S-T switch has a structure in which a call path is formed by connecting a time switch of a subsystem connected to an originating subscriber, a space switch of an INS, and a time switch of a subsystem connected to a called party. Accordingly, the Internet subscriber subsystem is connected to the space switch of the INS through the time switch 101, which is mapped one-to-one with the subscriber matching board link 102 through the call setup process, so that the actual Internet packet is transmitted. It becomes a way. The subscriber board is connected to a relay line matching board link 104 connected to an ISP to be connected via a high-speed Inter Processor Communication (IPC) network 103, and includes a time switch processor 105 as a processor to control these hardware devices. The subscriber matching processor 106 and the trunk line matching processor 107 communicate with the internet access signal processing processor 109 via the IPC network 108.

3 is a flowchart of a subscriber call processing procedure for an Internet access service according to the present invention.

First, when an ISDN subscriber requests a call setup by dialing a number requesting Internet access (200), a call setup request signal is transmitted to the digital subscriber call control block (201), and the digital subscriber call control block is a digital subscriber matching device. The call progress signal is notified to the calling terminal through 202, and a number translation is requested (203). If the number translation results prove to be a special number requesting the Internet access, the special subscriber notification signal 204 is sent to the digital subscriber call control block, and the Internet subscriber access call setup request signal is transmitted to the Internet subscriber call control block (205). Initiate the access call processing procedure. The Internet subscriber call control block transmits a relay line link status check request signal to the Internet routing control block (206), inquires of a relay line state connected to the ISP, and receives a result (207). The originating subscriber information request signal is sent to the block (208). In the digital subscriber call control block, the calling party time switch and the space switch are connected by the switch connection request and the connection notification signal (209), and the switch information is loaded on the calling subscriber information notification signal and transmitted to the called party Internet call control block (210). ). The called party Internet call control block sets up the called party's call path using the time switch of the Internet subsystem and the spatial switch information transmitted from the originator (211), and transmits the called party response signal to the digital subscriber call control block (212). ). The calling digital subscriber call control block notifies the calling terminal that the call connection is completed (213), and receives a response signal from the terminal (214). At this time, the calling subscriber knows that the call setup is successful and performs the PPP setup procedure. On the other hand, when the called party's Internet subscriber call control block sends a response notification signal to the calling party's digital subscriber call control block and carries information on a call set as the subscriber's Internet access control block (215), the subscriber interface is requested. The board knows that the PPP establishment procedure will be performed from the subscriber through the established channel and starts preparation for it and notifies the response (216). If the calling subscriber performs the actual PPP configuration procedure and successfully performs the Internet address allocation and end-to-end connection establishment procedure, the subscriber interface board notifies the subscriber call control block of the completion of PPP configuration through the subscriber Internet access control block (216). ). The Internet subscriber call control block then maintains the established channel so that Internet traffic is transmitted through the channel.

4 is an overall subscriber call processing flowchart for an internet access service according to the present invention.

First, a single party process for receiving a call function by an internet subscriber call setup request signal is generated by the main process (300), and the call process between the ISDN subscriber and the Internet service provider is generated by the party process generated in step 300. Set up and maintain the Internet connection (400).

5 is a flowchart illustrating a process of generating a child process by the main process of FIG. 4.

First, after initializing the time switch information and the link information of the subscriber board necessary for setting the call path (301), a signal indicating that the call control block has been initialized is transmitted to the subscriber Internet access control block, thereby initializing all information at the board level. If an Internet subscriber access call setup request signal is received from the number translation block (304) in a message reception waiting state 303 (waiting to receive a message), the subscriber board state of the Internet subsystem is checked (305). The link state is then checked for a good board (306), the check selects the good link and assigns it to the call (307), and creates a child process for handling this call (308). If you pass the selected link information when you create the child process, the child process uses this link information to establish a currency path.

6 is a process flow diagram for Internet access by the ruler process of FIG.

First, a request for the relay line link status is requested from the subprocessor generated from the main process to the block in charge of the Internet traffic routing function (410), and when the relay line status confirmation notification signal is received from the block requested in step 410, It connects a call channel, which is a fixed line for processing and transmitting Internet traffic, and transmits an Internet access call establishment request signal to a block in charge of the subscriber's Internet connection to notify the start of the PPP connection establishment and waits for a response (420). Next, if an internet access call setup completion notification signal is received from the block requested in step 420, the process is processed and waits for a PPP connection setup completion signal (440). When the PPP connection setup completion signal is received, Internet traffic communication is possible. Maintain a line state allocated to maintain (460).

FIG. 7 is a process flowchart for requesting a relay line link status check of FIG. 6.

First, when the child process is started by the main process, it transmits the calling subscriber information request signal to the calling digital subscriber call control block 109 (411), sets a timer for waiting for a response (412), and then sends the calling subscriber. Transition to the information notification signal waiting state (413). The originating digital subscriber call control block (109) sends an outgoing subscriber information notification signal including space switch information (414), the process releases the assigned timer (415), and sends the Internet to the Internet routing control block 120. The relay line link state check request signal connected to the service provider is transmitted (416), and a timer for waiting for a response is set (417), and then the state transitions to the relay line state check notification wait state (418).

8 is a flowchart illustrating a process of receiving a relay line state confirmation notification signal and transmitting an internet access call setup request signal of FIG. 6.

First, when the relay line state is managed by the Internet routing control block 120 and transmits a response signal (421), the call control block releases the timer set (422) and analyzes the response signal to determine whether Internet traffic transmission is possible. It is determined whether or not (423). If it is impossible to transmit traffic to the Internet network due to a bad relay line in step 423, since further call progress is meaningless, a procedure for releasing a call connection is performed. That is, a call failure is notified to the calling party, the subscriber is notified of the failure (424), and the link information table update managed by the main process is requested (425), and the actual allocated link is released (426). The child process is then released.

Next, when it is determined in step 423 that the relay line is in good condition and the Internet traffic transmission is possible, the subscriber station link information transmitted from the main process and the space switch information included in the originating subscriber information notification signal are used. In step 427, the subscriber station response notification signal is transmitted to the calling party (428). Then, the user sets the timer for receiving an answer (429), sets a timer for receiving a response (429) by carrying information on a call set in the subscriber Internet access control block 130, and then transitions to the waiting state for setting up an Internet subscriber access call. (431).

FIG. 9 is a flowchart illustrating a process of receiving an Internet access call setup complete notification signal and a PPP connection setup complete signal waiting signal of FIG.

When the Internet subscriber access call setup notification message is received (431), when the Internet subscriber access call setup notification message is received (441), the set timer is released (442), and the notification result is analyzed to determine whether traffic can be transmitted to the link. Determine (443). If it is determined in step 443 that traffic transmission to the corresponding link is impossible, a call failure is notified to the subscriber (444), and resource release is requested to the main process (445). Call release request 446). Then, the connection path is released (447), the allocated link is released (448), and the child process is released.

Next, if it is determined that traffic can be transmitted to the corresponding link as a result of the analysis of step 443, it is determined that the PPP connection is in progress between the subscriber and the interface board, and a timer is set to go to a state for receiving the PPP connection completion notification ( After the PPP connection establishment completion notification wait state (450).

FIG. 10 is a flowchart illustrating a process for receiving a PPP connection establishment completion signal and maintaining a line state of FIG. 6.

When the PPP connection establishment completion notification waiting state (450) is notified of the completion of the PPP connection establishment (461), the timer is released (462), and the state transitions to the Internet call connection completion state, and the connected channel is maintained while maintaining the connected call path. Wait for the release request signal (463).

As described above, the subscriber call control method for the Internet access service of the electronic switch using the routing function in the ISDN exchange can support the communication speed up to 64Kbps compared with the modem's 9.6Kbps to 28.8Kbps, and the communication cost is also higher There is a saving effect.

As described above, the present invention provides a procedure for allocating a fixed circuit inside an exchange for routing Internet traffic to an ISP when an ISDN subscriber requests Internet access as a subscriber call control procedure, and an Internet made to support Internet access in a circuit switched scheme. PPP connection procedure, which is a protocol, is required to perform the end-to-end communication setup procedure so that the subscriber can be assigned an Internet address, maintains the circuit set at the exchange while internet traffic is being transmitted, and assigns a circuit for each subscriber call. To manage the links of time switches and subscriber boards that make up the Internet subsystem, and to provide subscriber call control methods for Internet access services of electronic switchboards that dynamically or statically assigns Internet address information for each link. By providing Internet services Group has the effect of laying a foundation that can provide high-speed Internet access service, yet affordable cost to the desired subscriber.

Claims (7)

In a subscriber call control method for establishing and maintaining a call path between an ISDN subscriber and an Internet service provider to route Internet traffic inside an electronic switch, A first step of generating, by a main process, a single party process for performing an incoming call function on the Internet subscriber call setup request signal; And a second process of establishing and maintaining a call path between the ISDN subscriber and the internet service provider to perform internet access by the party process generated in the first process. Call control method. The method of claim 1, The first process includes: a first step of initializing time switch information necessary for establishing a call path and link information of a subscriber board; A second step of transmitting a signal indicating that the call control block has been initialized to the subscriber internet access control block when the first step is completed, and requesting to initialize all the information even at the board level; Waiting for reception of an Internet subscriber access call establishment request message; A fourth step of receiving an internet subscriber access call establishment request signal from the number translation block; A fifth step of checking a subscriber board state of the internet subsystem according to the request signal of the fourth step; A sixth step of checking a link state for a board in a good state after the fifth step is completed; A seventh step of selecting a good link and assigning it to the call as a result of the checking in the sixth step; And an eighth step of generating a child process for processing the call of the seventh step. The method of claim 1, The second step may include a first step of requesting relay line link status check from a generated child processor to a block in charge of the Internet traffic routing function; Receives the relay line status confirmation notification signal from the block required in the first step, processes the connection line, connects the call path, which is a fixed line for transmitting Internet traffic, and connects the Internet to the subscriber in charge of the Internet connection for initiating the establishment of the PPP connection. Transmitting a call setup request signal and waiting for a response; A third step of receiving and processing an internet access call setup completion notification signal from the block requested in the second step and waiting for a PPP connection setup completion signal; And a fifth step of maintaining an assigned line state to enable internet traffic communication upon receiving a PPP connection establishment completion signal from the requested block. The method of claim 3, wherein The first step includes: a first substep of transmitting a calling party subscriber information request signal to a calling party digital subscriber call control block when the child process is started by the main process; A second substep of setting a timer for waiting for a response to the request signal of the first substep; A third substep of transitioning to an outgoing subscriber information notification signal waiting state after the second step is completed; A fourth substep of transmitting an originating subscriber information notification signal including space switch information in an originating digital subscriber call control block; A fifth substep of releasing the assigned timer after receiving the information notification signal of the fourth step; A sixth substep of transmitting a relay line link status check request signal connected to an internet service provider to an internet routing control block; A seventh substep of setting a timer for waiting for a response to the request signal of the sixth substep; And an eighth sub-step of transitioning to a relay line state confirmation notification waiting state after the seventh sub-step is completed. The method of claim 3, wherein The second step includes: a first substep of receiving a relay line status confirmation notification signal from an internet routing control block; A second substep of releasing a timer set in the call control block after receiving the notification signal of the first substep; A third substep of analyzing the notification signal of the first substep to determine whether Internet traffic transmission is possible; A fourth sub-step of notifying a call failure to the calling party by notifying the caller of the failure if traffic transmission to the Internet network is not possible due to a poor relay line state in the third sub-step; A fifth substep of requesting to update a link information table managed by the main process; A sixth substep of releasing the actually allocated internet subscriber link; If it is determined that the relay line is in good condition in the third sub-step, it is possible to transmit the Internet traffic, then the subscriber line link information transmitted from the main process and the space switch information included in the originating subscriber information notification signal are used. A seventh substep of connecting; An eighth sub-step of transmitting a called party response message to the calling party; A ninth sub-step of requesting to establish an Internet subscriber access call by carrying information on a call set as a subscriber internet access control block; A tenth substep of setting a timer to receive a response to the Internet subscriber call setup request of the ninth substep; And an eleventh substep of transitioning to an internet subscriber access call setup notification waiting state after the tenth substep is completed. The method of claim 3, wherein The third step may include a first sub-step of receiving an Internet subscriber access call establishment notification message in a waiting state for setting up an Internet subscriber access call establishment notification; A second sub-step of releasing the set timer after receiving the notification message of the first sub-step; A third substep of analyzing the notification result of the first substep to determine whether traffic can be transmitted to a corresponding link; A fourth substep of notifying a call failure to the subscriber if it is determined that the transmission of the traffic to the corresponding link is impossible as a result of the analysis of the third substep; A fifth substep of requesting resource release to the main process; A sixth substep of requesting call release to the subscriber Internet access control block; A seventh sub-step of releasing a channel already connected; An eighth substep of releasing the allocated internet subscriber link; A ninth sub-step, if it is determined in the third sub-step that traffic can be transmitted to the corresponding link, a timer is set to go to a state for receiving a PPP connection completion notification by determining that the PPP connection is in progress between the subscriber and the interface board; And a tenth substep of transitioning to a PPP connection establishment completion notification waiting state. The method of claim 3, wherein The fourth step may include a first sub-step of receiving a notification signal of completion of PPP connection establishment in a waiting state for completing a PPP connection establishment; A second substep of releasing a timer after receiving the notification signal of the first substep; And a third substep of waiting for a call release request signal from the subscriber or the board while continuing to connect to the Internet call connection completion state. .

Images