KR950014953B1 - B-channel selection method for virtual b-channel packet communication in the isdn system - Google Patents

Abstract

The B-channel selecting method for a virtual circuit B-channel packet communication in a full electronic exchanger ISDN system comprises the steps of detecting an idle B-channel and releasing a calling signal packet call processing; processing a virtual circuit B-channel packet calling signal call; releasing a celled signal packet call processing, setting a called signal and transmitting it to a called terminal; processing a virtual circuit B-channel packet called signal call and detecting a B-channel; determining if there is a packet mode B-channel in the preset B-channels; and processing a virtual circuit B-channel packet called signal and releasing a called signal packet call processing.

Description

B-Channel Selection Method for Virtual Line B-Channel Packet Communication in Electronic Switching System

1 is a block diagram of hardware to which the present invention is applied.

2 is a flowchart illustrating B channel establishment according to outgoing packet processing according to the present invention.

3 is a flowchart illustrating B-channel establishment according to incoming packet processing according to the present invention.

* Explanation of symbols for main parts of the drawings

1,3: Digital Subscriber Interchange Subsystem (ASS-I)

1-4,3-4: ISDN Subscriber Registration Processor (ISAP)

1-3,2-3,3-3: Time Switch Processor (TSP)

1-1,3-1: Basic Rate Subscriber Matching Processor (BSI)

2: Packet Matching Switching Subsystem (ASS-P)

2-2: Packet Subscriber Access Switch Processor (ASP-P)

2-4,2-6: Packet Layer Control Processor (PLCP)

2-5,2-7: B-channel packet processing module (PHM-B)

4: Internal Network Subsystem (INS) 4-1: Internal Network Processor (INP)

4-2: Number Translation Processor (NTP)

The present invention relates to a B-channel establishment method required for an all-electronic switching system to perform virtual line B-channel packet call processing requested by a digital subscriber in ISDN.

Conventionally, when a digital subscriber requests circuit call processing in line mode, there is a B-channel set up for outgoing processing and a B-channel set up for incoming processing, respectively. When 2B-channel is used as a line, all channels are used in line mode, so that only two outgoing calls or two incoming calls can be processed.

Accordingly, the present invention devised to solve the above problems, by setting the B-channel capable of outgoing processing and a plurality of incoming processing at the same time as one B-channel that is not provided in the electronic switchboard ISDN line mode of the electronic switchboard The purpose of the present invention is to provide a B-channel selection method when a digital subscriber requests a virtual line B-channel packet call in ISDN.

In order to achieve the above object, the present invention provides a digital subscriber matching exchange sub-system (ASS-I), an ISDN subscriber matching processor (ISAP), a time switch processor (TSP), a basic rate subscriber matching processor (BSI), and a packet matching exchange. Subsystem (ASS-P), Packet Subscriber Access Switching Processor (ASP-P), Packet Layer Control Processor (PLCP), B-Channel Packet Processing Module (PHM-B), Internal Network Subsystem (INS), Internal Network Processor (INP), the operating method of the hardware provided with a number translation processor (NTP); The originating subscriber processing process includes a first step of searching for an idle B-channel by canceling outgoing packet call processing by performing processing according to a system state when a digital subscriber packet terminal attempts a call; and performing a B-channel after performing the first step. A second step of canceling outgoing packet call processing and proceeding with virtual line B-channel packet outgoing call processing according to the availability of the setting is performed. According to the fourth step of canceling the incoming packet call processing and setting the incoming signal and transmitting it to the called terminal, and after performing the third step, if the message is capable of processing the incoming packet call, it is examined whether the channel is set in the existing network. According to the result of the investigation, it is confirmed whether there is no channel information in the incoming message, and according to the status, the virtual line B-channel packet incoming call processing is performed and the B-channel is removed. After performing the fourth step of the searching and the fourth step, the virtual line B-channel packet incoming call processing is performed according to whether the idle B-channel is set. After the fifth step and the fifth step are performed, it is determined whether the existing packet mode B-channel exists, and the virtual line B-channel packet incoming call processing is performed according to the investigation result, and the incoming packet call processing is performed. It is performed by the sixth step of releasing.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of hardware to which the present invention is applied, in which 1 and 3 are Access Switching Processor for ISDN (ASS-I), and 1-4 and 3-4 are ISDN subscriber matching. Processor (ISDN Subscriber Access Processor (hereinafter referred to as ISAP), 1-3, 2-3, and 3-3 are Time Switch Processor (hereinafter referred to as TSP), 1-1, 3-1 are basic Basic Rate Subscriber Interface Processor (hereinafter referred to as BSI), 2 for Access Swithching Subsystem for Packet Swithching (hereinafter referred to as ASS-P), 2-2- for Packet Subscriber Access Access Switching Processor for Packet (hereinafter referred to as AS-P), 2-4 and 2-6 are Packet Layer Control Processors (hereinafter referred to as PLCP), 2-5, 2- 7 is a Packet Handling Mouls for B Channel (hereinafter referred to as PHM-B), and 4 is an internal network subsystem (Interconn). ection Network Subsystem (hereinafter referred to as INS), 4-1 denotes Interconnection Network Subsystem (hereinafter referred to as INP), and 4-2 denotes Number Translation Processor (hereinafter referred to as NTP). Indicates.

As shown in the figure, an ASS-I (1) connected to an INS 4 by an internal signaling path and connected to an X.25 data terminal device (hereinafter referred to as DTE) by an internal signaling path and a packet information transmission path. And ASS-P (2) connected to the INS 4 and the ASS-I (1,3) by an internal signaling path and to the ASS-I (1,3) by a packet information delivery path. The software block required for the B-channel setting for the virtual line B-channel packet call processing includes the Digital Subscriber Packet mode Control (ASP) (1-2, 3-2). Hereinafter, a DPC block and a Call Processing Shared Library (CSL) block are embedded, and the ISAPs 1-4 and 3-4 have a digital subscriber interface; Hereinafter, the DSI block loads a packet trajectory / Pache Inward-call control block (PIC) to the ASP-P 2-2. .

2 is a flowchart of the present invention.

First, look at the B-channel setting process for outgoing packet processing, when the digital subscriber packet terminal attempts to call through the BSI (1-1) of the ASS-I (1) through the DSI in the ISAP (1-4) A call setup message, which is the first message for outgoing packet call processing, is received by the DPC of the ASP-I (1-2) (5). The DPC checks whether the system is in a normal state (6) and if the call processing is impossible, transmits a release message to the calling terminal (11) and releases the call request requested by the terminal (12).

If the call processing is possible, the DPC checks whether there is channel information set in the terminal in the received call establishment message (7) and if there is information on the channel, the line number of the subscriber, the category of the subscriber, and the terminal set With channel information (8), if there is no information about the channel, with channel information indicating the line number of the subscriber, the category of the subscriber, and no channel information (9), call the channel configuration library in CSL Receive the B-channel in the network (10).

The DPC checks whether an idle B-channel establishment notification in the network or a notification that all B-channel establishment in the network is received as a result of B-channel establishment in the network (13). In the case of receiving the B-channel in the available network as a result of the investigation (13), it is checked whether it is equal to the B-channel number in the call setup message received from the terminal (16). As a result of the survey 16, if the B-channel set by the terminal and the B-channel number set by the network are the same, the DPC omits the channel information element in the first call progress message sent to the terminal (17) (for outgoing packet call processing). After the B-channel is established, the DPC omits the channel information element in the message sent to the terminal.)

As a result of the survey 16, if the B-channel set by the terminal and the R-channel number set by the network are different from each other, the DPC includes the channel information set by the network in the channel information element in the call progress message first sent to the terminal. The DSI of 1-4) notifies the originating terminal via the BSI (1-1) (18). The B-channel for outgoing packet call processing is established, and then the DPC omits the channel information element in the message sent to the terminal.

If there is no channel information element in the call establishment message received from the terminal and the idle B-channel is set in the network, the DPC records the B-channel set in the network in the channel information element in the call progress message first sent to the calling terminal and then the ISAP (1). 19 through the BSI (1-1) through the DSI of -4). The B-channel is set up for outgoing packet call processing, and the DPC omits the channel information element in the message sent to the terminal.

When all the B-channels can not be set by the DPC, the release message including the cause of the channel cannot be set is sent to the calling terminal through the BSI (1-1) through the DSI of the ISAP (1-4). Request for release (14) is performed to release the outgoing packet call process (150).

The DPC notifies the B-channel number set as described above to the PIC of the ASP-P (2-2) and uses it as a B-channel for subsequent virtual line B-channel packet origination signal processing.

3 is a flowchart illustrating a process of configuring a B-channel for incoming packet processing. Referring to the B-channel setting process with reference to the drawings as follows.

First, when the incoming number is translated from the PIC of the ASP-P (2-2) and the occupied channel is occupied by the ASP-I (3-2) of the ASS-1 (3), the DPC receives this message. Investigate the status of the switchboard ISDN system (23). As a result of the investigation 23, if the network state is not possible to process the incoming call, a call release message including the cause of the incoming call processing cannot be given to the PIC of the ASP-P 2-2 to inform the release of the requested incoming packet call processing ( 30,31). As a result of the survey 23, when the status of the network can be received, the B-channel in the network is called by calling the channel setting library in the CSL with the information indicating the line number of the subscription book, the category of the subscription book, and no information on the channel. It is set (25). The DPC is notified of the idle B-channel setting notification in the network and the absence of the idle B-channel in the network as a result of the channel setting, and searches for the idle B-channel to determine whether the idle B-channel has been set (26).

In case the idle B-channel in the network is established, the BSI is included through the DSI of the ISAP 3-4, including the channel information element set in the network in the first call setup message sent from the DPC to the called terminal (27). Give to the called terminal via (3-1) (29). If there is no idle B-channel in the network, the channel information element is omitted in the first call establishment message sent to the called terminal to the DPC (28) and the call is made through the BSI (3-1) through the DSI of the ISAP (3-4). Give to the terminal (29).

When the call progress, call, and connection message is received from the called terminal through the BSI (3-1) to the DPC of the ASP-I (3-2) via the DSI of the ISAP (3-4) (32), the DPC is first transmitted from the terminal. Channel information elements in the received message are examined (33) to set the B-channel for incoming packet call processing. As a result of the survey 33, if there is no channel information element in the first message received from the called terminal and there is no B-channel established in the network (40), the status message including the essential information element is missing. The DSI is transmitted to the called terminal via the BSI 3-1 (42). Thereafter, the incoming call processing is released by the message transmitted from the terminal.

If there is no channel information element in the first message received from the destination terminal to the DPC, and there is a B-channel established in the network (34), the DPC uses the B-channel set in the network for B-channel packet incoming processing. -Use as channel (35). Thereafter, the channel information element is omitted in the message transmitted from the network to the terminal.

If there is an information element about the channel in the first message received from the terminal to the DPC, (34) the subscriber's line number and subscription to release the B-channel set in the network and set the B-channel set in the terminal in the network as well. The B-channel in the network is set by calling the channel setting library in the CSL with the chapter category and the channel information set by the terminal (35 to 39).

As a result of setting the B-channel configured in the terminal, the network checks whether it is an idle B-channel even in the network (43). It is used as a B-channel for incoming call processing (53). Channel information elements are omitted in the message transmitted from the network to the terminal (54, 55). If it is not an idle B-channel in the network, it is checked whether the B-channel set by the terminal is a packet call processing channel in the network (44). In the DPC, a library is searched for a B-channel that is currently used in the packet mode of the CSL using the subscriber line number and the B-channel number set by the terminal.

Investigate whether the B-channel set by the terminal is the B-channel being used in the network for packet communication (45). Send a call release message containing the cause of use and set Requires release of B-channel. In addition, it requires the release of the B-channel that is established and used in the network. In addition, the B-channel number, which is previously set and used in the network, is included in the preset channel information notification message and sent to the PIC of (2-2) to be used as a channel for subsequent virtual line B-channel packet call incoming processing. . As described above (44 to 49), multiple subscribers can simultaneously transmit various packet information to one subscriber using one B-channel. If the terminal is not the B-channel set by the terminal, the DPC is included in the release message that the channel is not available to the terminal to the destination terminal through the DSI of (3-4) to request the release of the ongoing packet incoming signal, the packet The PIC of the incoming call processing (2-2) is also notified of the release to the requested packet incoming signal (50 to 52).

Therefore, the present invention configured and operated as described above provides various services to subscribers by efficiently setting up the B-channel for virtual line B-channel packet communication required by the digital subscriber and improves the capacity and reliability of the system. It works.

Claims (6)

Digital Subscriber Switched Subsystem (ASS-I) (1,3), ISDN Subscriber Matched Processor (ISAP) (1-4,3-4), Time Switch Processor (TSP) (1-3,2-3,3) -3), Basic Rate Subscriber Matching Processor (BSI) (1-1, 3-1), Packet Matching Switching Subsystem (ASS-P) (2), Packet Subscriber Access Switching Processor (ASP-P) (2-2) ), Packet Layer Control Processor (PLCP) (2-4, 2-6), B-Channel Packet Processing Module (PHM-B), (2-5, 2-7), Internal Network Subsystem (INS) (4 A hardware operating method comprising an internal network processor (INP) 4-1 and a number translation processor (NIP) 4-2; The outgoing subscriber processing process is performed by the digital subscriber packet terminal when the call attempt is performed according to a system state to search for an idle B-channel and release the outgoing packet call processing, and performs the first step. Thereafter, according to whether or not the function of the B-channel setup is performed by the second step (13 to 21) to cancel the outgoing packet call processing and proceed with the virtual line B-channel packet outgoing call processing, the called party processing process is idle. In the state of requesting the packet subscriber, the third step (22 to 29) of releasing the incoming packet call processing according to the system state, setting the incoming signal and transmitting it to the called terminal, and performing the incoming packet call processing after performing the third step. In the case of a message that can be transmitted, it checks whether the channel is set in the existing network and checks whether there is any channel information in the incoming message according to the survey result. In the fourth step (32 to 42) of proceeding with the call processing and searching for the B-channel, and after performing the fourth step, the virtual line B-channel packet incoming call processing is performed according to whether the idle B-channel is established. The fifth step (43, 44, 53 to 55) for determining whether there is a packet mode B-channel among the previously set B-channel, and whether the existing packet mode B-channel exists after performing the fifth step. The virtual line in the electronic switch office ISDN system, which is performed by the sixth step (45 to 52) of proceeding the virtual line B-channel packet incoming signal processing and releasing the incoming packet call processing according to the investigation result. B-channel selection method for B-channel packet communication. 2. The method of claim 1, wherein the first steps (5 to 12) are performed by the digital subscriber packet terminal through the BSI (1-1) of the ASS-I (1), and the DSI in the ISAP (1-4). Through the DPC of the ASP-I (1-2) through the first message for the outgoing packet call processing message (setting) is received and the DPC to check whether the state of the system is normal (5, 6) And after performing the steps (5,6), if the call processing is impossible, sending a release message to the calling terminal and proceeding to release the call request requested by the terminal (11,12), and the steps (5,6) After performing, if the call processing is possible, the DPC checks whether there is channel information set in the terminal in the received call setup message (7), and after performing step (7), if there is information on the channel, the subscriber The line number of the subscriber, the category of the subscriber, the channel information set by the terminal, and if there is no information on the channel, the subscriber's line Characterized in that it is performed by a step (8 to 10) of receiving a B-channel in the network by calling a channel setting library (Libary) in the CSL with the channel information indicating the number, the category of the subscriber, and no channel information. B-channel selection method for virtual line B-channel packet communication in all electronic switch ISDN system. 2. The method of claim 1, wherein the second steps 13 to 21 are performed by the DPC as a result of setting up an idle B-channel in the network and notifying all B-channels in the network cannot be established. After performing step 13 and performing step 13, if the B-channel in the available network is set, the terminal checks whether it is the same as the B-channel number in the call setup message received from the terminal, and sets it in the terminal. If the B-channel number set in one B-channel and the network is different from each other, the DPC includes the channel information set in the network information element in the call progress message first sent to the terminal through the DSI of the ISAP (1-4). If (1-1) is notified to the calling terminal and there is no channel information element in the call setup message received at the terminal, and the idle B-channel is set in the network, the DPC first sends the B-channel set in the network to the calling terminal. IS in the channel information element in the progress message In step 16 to 21 of transmitting to the calling terminal through the BSI (1-1) through the DSI of the AP 1-4, and after performing the step 13, if all the B-channel setup notifications are received from the DPC, Releases outgoing packet call processing by requesting release of packet mode outgoing request requested by UE by sending release message including cause of channel establishment impossible through BSI (1-1) through DSI of ISAP (1-4). B-channel selection method for virtual line B-channel packet communication in an electronic switch system ISDN system, characterized in that carried out by steps (14, 15). The method as claimed in claim 1, wherein the third step (22 to 29) translates the called number in the PIC of the ASP-P (2-2) and calls the ASP-I (3-2) of the ASS-I (3). When the channel occupancy request is made, the DPC receives this message to investigate the state of the electronic switchboard ISDN system (22, 23), and after performing the steps (22, 23), if the state of the network is impossible to process incoming calls, (30,31) informing the release of the requested incoming packet call processing by giving a call release message including the cause information of the incoming call to the PIC of the ASP-P (2-2); Then, if the status of the network can be received, the channel setting library in the CSL is called with the information indicating the line number of the subscription book, the category of the subscription book, and no information on the channel, and the B-channel in the network is established. The DPC is notified of the idle B-channel setting in the network and the absence of the idle B-channel in the network as a result of the channel setting. Investigating whether the idle B-channel is established by searching for the B-channel (24 to 26), and after performing the above steps (24 to 26), when the idle B-channel in the network is established, the called terminal is first called by the DPC. Including the channel information element set in the outgoing call establishment message through the DSI of the ISAP (3-4) to the destination terminal through the BSI (3-1), and if there is no idle B-channel in the network, the DPC In step (27 to 29), the channel information element is omitted from the first call setup message sent to the called terminal by transmitting to the called terminal via the BSI 3-1 through the DSI of the ISAP 3-4. A B-channel selection method for virtual line B-channel packet communication in an all-electronic switch ISDN system. The method as claimed in claim 1, wherein the fourth steps 32 to 42 include call forwarding, calling, and connection message from the called terminal through the BSI 3-1 through the DSI of the ISAP 3-4. 3-2) (DPC checks the channel information elements in the message first received by the terminal (32, 33), and after performing the steps (32, 33), in the first message received at the called terminal If there is no channel information element and there is no existing B-channel set up in the network, a status message including the reason that there is no required information element is transmitted through the BSI (3-1) to the called terminal through the DSI of the ISAP (3-4). If there is no channel information element in the first message received from the destination terminal to the DPC and there is a B-channel established in the existing network, the DPC uses the B-channel set in the network for the virtual line B-channel packet incoming processing. In the first message received from the terminal to the DPC after the steps 40 to 42 and the steps 40 to 42 are performed. If there is an information element about the channel, it has the line number of the subscriber, the line category of the subscriber, and the channel information set by the terminal in order to release the B-channel set in the network and set the B-channel set in the terminal in the network. B-channel for virtual line B-channel packet communication in an electronic switchboard ISDN system, characterized by the steps 34 to 39 of setting up a B-channel in the network by calling a channel setting library in the CSL. How to choose. The method of claim 1, wherein the fourth step (45 to 52), the step 45 of checking whether there is a packet mode B-channel currently in use, and after performing the step 45, the B-channel set by the terminal Investigate whether the B-channel is being used in the network for this packet communication and send a call release message including the reason that the B-channel requested by the DPC to the terminal is preset and in use only in the B-channel. Set by Request for the release of the B-channel and include the B-channel number that has been set and used in the network in the preset channel information notification message and sent to the PIC of (2-2). In step 46 to 49, which enables multiple subscribers to simultaneously transmit various packet information to one subscriber by using one B-channel, and after performing step 45, the terminal sets If the B-channel is not a B-channel being used in the network for packet communication, the DPC is in the release message indicating that there is no channel available to the terminal, and is in progress by giving to the called terminal through the DSI of (3-4). All electronic switch ISDN characterized by requesting the release of the packet arrival signal, and notifying the release of the requested packet arrival signal (50 to 52) also by the PIC of the packet arrival signal processing request (2-2). Virtual on the system B- channel selection method for a line B- channel packet communications.