KR950014951B1 - Virtual b-channel packet call processing method in the ess - Google Patents

Abstract

The message processing method for a virtual circuit service B-channel packet intra-office call processing in an ISDN full electronic exchanger system comprises the steps of: (1) if a digital subscriber tries a packet mode call, checking the subscriber state whether it is possible to process a signal calling, if it is checked that it is possible to process a signal calling, allotting a calling signal B-channel to set a physical path of a calling party and if it is checked that it is impossible to process a signal calling, informing the impossibility of signal calling process by a release processing; and (2) if it is received a incoming call occupying request, checking the subscriber state if it is possible to process a call-receiving, if it is checked that is impossible to process a call-receiving, requesting an early release of a calling signal B-channel and if it is checked if it is possible to process a call-receiving, allotting an idle B-channel to set a physical path of a called party.

Description

Message Processing Method for Virtual Line Service (B) -Channel Packet Local Call in IDN Switching System

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

2 is an overall flow chart in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

110: digital subscriber match exchange subsystem (ASSI)

111: ISDN D-Channel Control Processor Board (IDPA)

112: digital subscriber matching processor (ISAP)

113: Digital Subscriber Access Switch Processor (ASPI)

114: time switch processor (TSP) 115: time switch (TSW)

120: Packet Matching Switching Subsystem (ASSP)

121: Packet Subscriber Access Switch Processor (ASPP)

122: packet processing module (PHM) 123: time switch processor (TSP)

130: internal network subsystem (INS)

131: internal network processor (INP)

132: number translation processor (NTP) 133: space switch processor (SSP)

134: space switch (SSW) 140: terminal adapter (TA)

150: X.25 data terminal equipment (DTE)

The present invention relates to a Q.931 (CCITT. Recommendation) message processing method for performing a virtual circuit B-channel packet local call processing required by a digital subscriber in an integrated services digital network (ISDN) electronic switch exchange.

In an electronic switch system that performs the ISDN function, the function of processing the virtual circuit B-channel packet local call required by the digital subscriber is essential for the switching function through the ISDN.

Accordingly, an object of the present invention is to provide a method for processing a Q.931 message on a D-channel supporting a B-channel packet exchange by establishing a physical path between subscribers according to a digital subscriber's request.

To achieve the above object, the present invention provides a digital subscriber matching exchange subsystem comprising an ISDN D channel control processor board, a digital subscriber matching processor, a digital subscriber access switching processor, a time switch processor, and a first time switch; A packet matched switching subsystem including a packet subscriber access switching processor, a packet processing module, a second time switch, and a time switch processor and connected to the digital subscriber matched switching subsystem; And an ISDN electronic switch having a space switch, a space switch processor, an internal network processor, and a number translation processor, and having an internal network subsystem connected to the digital subscriber-switched switching subsystem to perform a virtual circuit service B-channel exchange. In the message processing method for; When the digital subscriber attempts to make a packet mode call, the subscriber state is checked for possible outgoing processing, and when the outgoing subscriber is available, the outgoing B-channel is allocated to establish the outgoing physical path and the outgoing subscriber is not available. A first step of notifying that outgoing processing is not possible through the release processing; And when the incoming call occupancy request is received, the subscriber state is checked whether the incoming call processing is possible. If the incoming call processing is not possible, the call is requested to be released early. If the incoming call processing is possible, the temporal B-channel is allocated. And a second step of establishing a route.

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

1 is a schematic block diagram of an ISDN switch to which the present invention is applied, in which 110 is a Digital Access Switching Subsystem (ASSI) and 111 is an ISDN D-Channel Control Processor Board (IDPA). ISDN D-channel control processor board assembly (112), 112 is an ISDN Subscriber Access Processor (ISAP), 113 is a Digital Access Switching Processor (ISPI), 114 is a Time Switch Processor (TSP) Time Switch Processor), 115 is Time Switch (TSW), 120 is Access Switching Subsystem for Packet (ASSP), 121 is Access Switching for Processor Packet (ASPP), 122 is a Packet Handling Module (PHM), 123 is a Time Switch Processor (TSP), 130 is an Interconnection Network Subsy (INS) stem, 131 is the Interconnection Network Processor (INP), 133 is the Space Switch Processor (SSP), 134 is the Space Switch (SSW), 140 is the Terminal Adapter (TA), 150 is Represents an X.25 data terminal device (DTE), respectively.

In addition to the hardware configuration described above, a software block for virtual circuit service B-channel packet local call processing, and the ASPI 113 includes a digital subscriber packet mode control (DPC) block and local signal service control. A Local Service Control (LSC) block is mounted, a Digital Subscriber Interface (DSI) block is mounted on the ISAP 112, and a Time Switch Link (TSL) block is mounted on the TSP 114. The ASPP 121 is equipped with a function block for performing functions such as B-channel setup release and number translation request upon packet mode call request, and the function block for X.25 protocol processing is mounted on the PHM 122. The TSP 123 is equipped with a Time Switch Link (TSL) block, the INP 131 is equipped with a Switch Network Control (SNC) block, and the NTP 132 has a number translation (NTR). : Number T ranslation) block is implemented.

2 is an overall flowchart according to the present invention.

When the digital subscriber attempts to make a packet mode call, a packet call origination request is transmitted to the DPC block of the ASPI 113 via the IDPA 111 through the DSI block of the ISAP 112 (311).

The DPC block verifies the system status, originating subscriber status check, and information error to check if the subscriber status is capable of originating processing (312).

As a result of the investigation, if the subscriber cannot perform the origination processing, after generating the release information, the release processing is notified to the DSI block of the ISAP 112, and the origination processing is notified (315, 316). If possible subscribers are allocated to the B-channel (313) to prepare for the physical path setup of the calling party (314).

Accordingly, the processor performing the originating side physical path establishment makes a call progress request 317 to the DSI of the ISAP 112 and receives outgoing packet processing from the ASPP 121 (318 and 319).

Next, the originating space switch connection is requested (320) to check whether the connection is established (312). According to the survey 321, the DPC block requests the originating space switch to be connected from the SNC block of the INP 131 (322, 323). The call paths are allocated from 114 to 324 to 326.

Accordingly, after the call connection notification is made to the DSI block (327), a busy state is established (329).

However, when the originating space switch is not connected, the originating packet processing release request is sent to the ASSP 121 (331), and the call disconnection notification and release completion notification are sent to the DSI to release the set B-channel (332 to 334). ).

On the other hand, if the DPC block receives the incoming call request from the ASPP 121 (335), it checks whether the incoming call processing is possible by performing a status check and information error verification of the system state / called subscriber (336). As a result of the investigation 336, if the incoming call is impossible, the ASPP 121 requests the early release of the incoming B-channel (339).

However, if the incoming processing is possible, the temporal B-channel in the network is allocated (337) to prepare for establishing the called-side physical path (338).

Accordingly, the processor performing the physical path establishment of the called party requests the B-channel establishment to the called party 340, and the called terminal notifies the network of available channel information through the access notification message (341).

If the channel set by the terminal and the channel set by the terminal in the received message are the same (342), and if it is the same, the ASPP 121 makes an incoming packet processing allocation request (343). After the B-channel set by the network is released, the B-channel set by the UE is newly set (353, 354), and the process returns to the process (343) of requesting the allocation of the incoming packet.

When the ASPP 121 allocates and responds to the incoming packet processor (344), the DPC requests the space switch connection (345) to check whether the space switch is connected (346). As a result of the investigation 346, if the space switch is connected, the incoming time switch is requested to connect to the call to notify the subscriber that the call is connected (347 to 351).

As a result, calls between the calling party and the called party are connected to reach a busy state (352).

However, when the space switch is not connected (346), the DPC block makes a request for release of incoming packet processing to the ASPP 121 (355) and a disconnection notification to the destination terminal (356 to 358). Release (359).

In addition, when receiving a call progress message or a call message (340) in response to a packet call establishment request (340) as in the processes (340 to 359), the channel set by the network and the called terminal are set and transmitted. In operation 361, if the information of the provided channels matches, the process 341 or less is performed to receive the access notification, and if different, the process 353 and 354 or less is performed.

Therefore, the present invention has an effect of giving a packet switching function (especially 64 kbps) to an all-electronic switch by performing a virtual circuit service B-channel packet local call processing among packet mode services requested by a digital subscriber connected in the switch.

Claims (5)

ISDN D Channel Control Processor Board (IDAP) 111, Digital Subscriber Matching Processor (ISAP) 112, Digital Subscriber Access Switching Processor (ASPI) 113, Time Switch Processor (TSP) 114, First Time Switch A digital subscriber match exchange subsystem (ASSI) 110 having a (TSW) 115; A packet subscriber access switching processor (ASPP) 121, a packet processing module (PHM) 122, a second time switch 115, a time switch processor 123, and Connected packet matched exchange subsystem 120; And a space switch (SSW) 134, a space switch processor (SSP) 133, an internal network processor (INP) 131, and a number translation processor (NTP) 132. A message processing method for performing a virtual circuit service B-channel exchange applied to an ISDN switchboard having an internal network subsystem (INS) 130 connected to an INS 130; When the digital subscriber attempts to make a packet mode call, the subscriber state is checked for possible outgoing processing, and when the outgoing subscriber is available, the outgoing B-channel is allocated to establish the outgoing physical path and the outgoing subscriber is not available. First steps (311 to 316) for notifying the transmission process through the release process; And when the incoming call occupancy request is received, the subscriber state is checked whether the incoming call processing is possible. If the incoming call processing is not possible, the call is requested to be released early. If the incoming call processing is possible, the temporal B-channel is allocated. And a second step (335 to 339) of establishing a path. The method of claim 1, wherein the first step (311 to 316), if the digital subscriber requests packet call origination processing, the ASPI 113 checks the system status / originating subscriber status investigation and information error to verify the subscriber status. A third step (311, 312) for checking whether outgoing processing is possible; A fourth step (313, 314) of establishing a physical path of the calling party by allocating a B-channel if the subscriber is capable of originating as a result of the survey of the third step (311, 312); And a fifth step (315, 316) for notifying the originating process by requesting the release process after the release information is generated and returning to the first time when the subscriber is unable to process the call as a result of the investigation of the third step (311, 312). Message processing method for establishing a virtual line service B-channel packet local call in an ISDN electronic switch system. The originating side physical path establishment process of claim 1, wherein the originating side physical path setting process of the first steps 311 to 316 is requested after the call forwarding is requested to the ISAP 112 and the outgoing packet processing is allocated from the ASPP 121. A third step (317 to 321) for checking whether the switch is requested by connecting the switch; As a result of the investigation of the third step (317 to 321), when the outgoing space switch is connected, the outgoing time switch is requested to the ASPI 113 to allocate the call path from the TSP 114 to the ISAP 112. A fourth step (322 to 327,328) which is in a busy state after notifying the call connection; And when the outgoing space switch is not connected as a result of the investigation in the third step (317 to 321), requesting release of outgoing packet processing to the ASPP 121 and notifying the ISAP 112 of call disconnection and release; And a fifth step (330 to 334) of releasing the B-channel. 16. A method for processing a message for establishing a virtual line service B-channel packet local call in an ISDN switchboard system. 2. The method of claim 1, wherein the second step (335 to 339), upon receiving the incoming call request from the ASPP 121, the ASPI 113 checks the status of the system / incoming subscriber status and verify information error; A third step (335, 336) of checking whether the subscriber status is capable of incoming call processing; A fourth step (339) of requesting the early release of the incoming B-channel to the ASPP (121) when the subscriber status is not possible to process the incoming call as a result of the investigation of the third step (335, 336); And a fifth step (337, 338) of setting up a called-side physical path by allocating an idle B-channel when the subscriber state is capable of incoming call processing as a result of the investigation of the third step (335, 336). Method of message processing for virtual line service B-channel packet local call establishment in electronic switching system. The method of claim 1, wherein the setting of the called party physical path in the second steps 335 to 339 comprises: a third step 340 of requesting B-channel establishment to the called party; A fourth step (341, 342) of checking whether the channel set by the network and the channel set and transmitted by the terminal are the same after notifying the network of available channel information through the access notification message after performing the third step (340); As a result of the investigation of the fourth steps 341 and 342, if the two channels are the same, the ASPP 121 allocates an incoming packet handler and the ASPI 113 requests a space switch connection to check whether the space switch is connected. 5 steps 343 to 346; As a result of the investigation of the fourth step (341 to 342), if the two channels are not the same, after repeating the fifth step (343 to 346) after releasing the B-channel set in the network and setting a new B-channel The sixth step (353, 354); As a result of the investigation of the fifth step (343 to 346), when the space switch is connected, the seventh step (347 to 352) is in a busy state after requesting connection of the incoming time switch and the call to notify the subscriber that the call is connected. ); When the space switch is not connected as a result of the investigation in the fifth step (343 to 346), the ASPI 113 requests the ASPP 121 to release the incoming packet processing and notifies the disconnection to release the call. An eighth step (335 to 359) of releasing the channel; And after receiving the progress or call message after performing the third step 340, it checks whether the channel set by the network is identical to the channel set by the terminal, and if it is different, repeats from the sixth step (353, 354). And a ninth step (360,361) of repeating the fourth step (341, 342) from the fourth step (341, 342).