KR960014423B1 - Packet intermediation call set-up method of isdn switch - Google Patents

Abstract

41-51 assigning the sending call id number when receiving the X.75 call request packet from a relay sending switch, arranging a sending call table and a control packet buffer, analyzing the send/receive signal and checking a network utility, and requesting a link connection to request a number translation; 52-55 selecting a route according to a relay route status, choosing a connection link by requesting the receive call control request and transferring the receive PHM number and the link number into a send process; 56-60 storing the receive PHM number and the link number transferred from a receive process; 61-74 assigning the receiving id number and the inner call id number when receiving the call request packet for inner transmitting from the send process, storing the send processing information by arranging the receiving table and the control packet buffer, checking the network utility by separating the header of the call request packet, and transferring the call request packet into the relay sending switch; 75-87 checking the call connection packet, deciding the receive process control variable, arranging the receive data packet buffer, and transferring the call connection packet into the send process; and 88-100 deciding the send process flow control variable and the packet size for transmitting, arranging the send process data packet buffer, and transferring the send process call connection packet into the relay sending switch.

Description

How to set up packet relay call in an integrated telecommunication network switch

1 is a schematic configuration diagram of an integrated information communication network switch for processing packet data to which the present invention is applied.

2 is a software configuration diagram of an exchange for packet data processing to which the present invention is applied.

3 is a flowchart of a packet relay call setup method according to the present invention;

4 is a flowchart of processing upon reception of an X.75 call request packet by a calling party according to the present invention.

5 is a flowchart illustrating a packet relay link establishment process according to the present invention.

6 is a flow diagram of an originating side process after a packet relay link is established according to the present invention.

7 is a flowchart illustrating processing of receiving an X.75 call request packet at a called party according to the present invention.

8 is a flowchart illustrating a process of receiving an X.75 call connection packet at a called party according to the present invention.

9 is a flowchart illustrating a process of receiving an X.75 call connection packet at an originating party according to the present invention.

The present invention relates to a method for setting up a packet relay call in an ISDN switch. The present invention relates to an X.75 in an integrated IT network configured with an all-electronic ISDN exchange that provides not only voice but also packet data exchange functions over a conventional line. The present invention relates to a packet relay call setting method for relaying packet data using a protocol.

The conventional public telephone network provides only circuit switching, and the user who needs packet switching uses a packet switching network composed of a dedicated packet switch, so there is no relay of packet data in the public telephone network.

However, with the evolution of the public telecommunication network into a general information communication network that provides circuit switching and packet exchange at the same time by a conventional line, not only voice switching but also packet switching relaying is required in a general information communication network composed of all-electronic ISDN switches. The need for packet relay call establishment that satisfies the X.75 protocol, recommended by the International Organization for Electronic ISDN Switching Periods.

Accordingly, the present invention devised to meet the above demands provides distributed packet processing processors with a minimum of call processing resources according to the call setup procedure of the X.75 protocol, low call setup delay time, and reliable information. An object of the present invention is to provide a method for establishing a packet relay call during a communication network switching period.

The present invention for achieving the above object is an outgoing packet X.75 protocol processing block (P75Ho) which is connected to the packet relay link of the relay source exchange and the relay destination exchange to perform link layer processing and packet exchange of the X.75 protocol. And a packet handling module (PHM) including a destination packet X.75 protocol processing block (P75Ht), and an originating packet network interworking call control block (PICCo) that performs packet verification and logical channel management at the source and destination. A packet layer control processor (PLCP) including a called party packet network interworking call control block (PICCt) and a packet call direction control block (PDC) for performing call progress control according to a packet call setup request; Connection exchange program for packet exchange, including packet outgoing call control (POC) that controls the establishment and release of fixed paths and selects the relay route. A packet relay call setting method applied to an all-in-one telecommunications network switch for packet exchange with an access switching processor for packet (ASP-P), and is transmitted when an X.75 call request packet is received from a relay originating exchange. After assigning call identification number, assigning origination for outgoing call table and control packet, verifying outgoing signal analysis and network utility, relaying when receiving result of number translation by requesting number translation by requesting number translation A second step of selecting a route according to the state of the route, requesting a called party call control to select a relay link, and transferring the called party PHM number and the link number to the calling party process; The calling process stores the called party PHM number and link number delivered from the called party, constructs an internal request call packet, and transmits it to the called party. After assigning a call identification number and internal call identification number, assigning an outgoing call table and an outgoing call for a control packet, storing outgoing party information, verifying the network utility by separating the header of the call request packet, and constructing a call request packet. In the fourth step of transmitting the call connection packet as a response to the call request packet from the relay destination exchange, verifying the call connection packet, and determining the destination flow control variable, and for the destination data packet. After allocating outgoing call, construct the call connection packet for internal transmission and send it to the calling party. A sixth step of determining an originating flow control variable upon determining the originating packet, determining the size of the packet to be transmitted, assigning an origination for the originating data packet, constructing an originating call connection packet, and transmitting it to the relay originating exchange. Characterized in that it comprises a step.

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

1 is a schematic block diagram of an electric electronic ISDN switch for performing packet relay call setup to which the present invention is applied.

All electronic ISDN exchanges for packet data processing include an Access Switching Processor (APS-P) (1), which selects a packet relay route, performs packet verification and logical channel assignment. Packet Layer Control Processor (hereinafter referred to as 'PLCP') (2), Packet Handling Module (hereinafter referred to as 'PLCP'), which performs frame-packet conversion and packet exchange with X.75 link layer control. 3), a control interconnection network (CI) for providing a communication path between the ASP-P 1 and a packet layer control processor (PLCP) 2, and a packet processing module (PHM) ( 3) a packet bus (PBUS: Packet BUS) that provides a communication path between and between the packet layer control processor (PLCP) 2 and the packet processing module (PHM) (3).

Figure 2 shows a software block diagram of an all-electronic ISDN exchange performing packet relay call setup according to the present invention.

The PHM (3) is connected to the packet relay link of the relay originating exchange and the relay terminating exchange, and does not receive the originating packet X.75 protocol processing block (P75Ho) (4) that performs link layer processing and packet exchange of the X.75 protocol. An originating packet network interworking call control block (PICCo) 6 having a side packet X.75 protocol processing block (P75Ht) 5, which performs packet verification and logical channel management of the originating and destination side. And a called party packet network interworking call control block (PICCt) 7.

In addition, the ASP-P 1 controls a packet call direction control block (PDC) 8 that performs call progress control according to a packet call setup request, sets and releases a fixed path, and selects a relay route. Packet outgoing call control (POC) (9).

3 is a flowchart illustrating the overall process of the packet relay call setup method according to the present invention.

First, the X.75 call request packet inputted from the relay originating exchange is analyzed and verified, and then number translation is requested (31). After checking the packet relay call based on the number translation result, the relay route is selected, the incoming relay link is selected and notified to the calling party call control process (32). Next, after storing the calling party call control information, the call request packet is forwarded to the called party packet processing module (PHM) (33), the called party logical channel is assigned, the call request packet is converted, and then the relay called exchanger. Send an X.75 call request packet (34), and when the X.75 access packet is received from the relay destination exchange, verify the call connection packet, allocate the called party's call processing resource, and arrange the calling party call control information. After completing the call setup process of the called party, the terminal transmits the call connection packet to the calling party packet processing module (PHM) (35).

The calling party verifies the call connection packet, allocates the calling party's call processing resources, cleans up the calling party's call control information, and completes the calling party's call setup process. Complete call setup (36).

The present invention described above is described in more detail with reference to FIGS. 4 to 9 as follows.

4 is a flowchart illustrating an originating process when receiving an X.75 call request packet according to the present invention, in which an originating packet X.75 protocol processing block (P75Ho) receives an X.75 call request packet from a relay originating exchange. Upon receipt (41), a new call authorization is identified (42) with reference to the outgoing link and logical channel number.

If the call is not new, the X.75 call request packet is ignored or released according to the call processing state (43). If the call is new, the caller identification number is assigned (44). In addition, the call origination table for managing call processing information and the control packet origination are allocated (45) to confirm whether the allocation result is successful (46).

If the allocation for the originating table or the control packet fails due to the exhaustion of call processing resources (43), the call is released (43). If the allocation of the originating table and the origination is successful, the first X.75 call request packet header is used. After leaving three octets for the control packet transmission, the remaining packet body is transmitted to the PICCo 6 (47), and the call processing state is changed to the 'calling side call setup packet processing' state (48).

PICCo (6) verifies the network utility by analyzing the source and destination numbers of the call request packet body delivered from P75Ho (4) (49), and if abnormality of the verification result (50) is found, releases the call to P75Ho (4). (43), and if normal, requests the PDC (8) for packet call control (51).

5 is a flowchart illustrating a packet relay link setup process according to the present invention. When the PDC 8 receives a packet call control request from the PICCo 6, it requests a number translation software block (NTR: Number TRanslation) to convert the packet. It checks that it is a relay call (52), selects an appropriate route according to the state of the relay route, and requests the called party call control to a packet layer control processor (PLCP) 2 managing the route (53).

The destination packet layer control processor (PLCP) 2 generates a destination packet network interworking call control processor (PICCt) 7, and the PICCt 7 selects a relay link in consideration of the load distribution among the relay routes (54). At step 55, the called party's packet processing module (PHM) number and link number are notified to the calling party's packet network interworking call control process (PICCo).

6 is a flowchart illustrating an originating process after a packet relay link is established according to the present invention.

The originating packet network interworking call control process (PICCo) 6 receives the packet relay link establishment result from the called party packet network interworking call control processor (PICCt) 7 (56). The number is forwarded to the P75Ho (4) together with the call request packet verification result to store the called party's call processing information (57).

The P75Ho (4) combines the header stored in the origination for the control packet with the packet body delivered from the (PICCo) 6 to form a call request packet for internal transmission (58), and then transmits the internal call request packet to the called party's P75Ht. (59), and the call processing state is changed to the originating effective connection packet reception waiting state (60).

7 is a flowchart describing a called party processing procedure when receiving an X.75 call request packet according to the present invention.

When the destination packet X.75 protocol processing block P75Ht receives an internal transmission call request packet from the source P75Ho (61), it confirms the new call authorization with reference to the destination link and the logical channel number (62).

If the call is not a new call, the call request packet is ignored according to the call processing state, or the call release is requested to the calling party (63). In the case of a new call, an incoming call identification number is assigned with reference to the called link and logical channel number (64). ).

In addition, an incoming call table for processing call processing information and an origination for a control packet are allocated (65) to confirm the allocation result (66).

If the allocation for the table or the control packet fails due to the depletion of call processing resources, the call request is requested to the calling party (63). If the allocation is successful, the calling party processing information is stored in the incoming call table. 67), the header of the call request packet is separated, and the packet body is transmitted to the PICCt 7 (68), and the call processing state is changed to the called party's call connection packet reception wait state (69).

The destination packet network interworking call control process PICCt (7) analyzes the call request packet body delivered from P75Ht (5), verifies the network utility (70), and delivers the result to P75Ht (5). P75Ht (5) releases the incoming call table and control packet buffer when the verification result delivered from P75Ht (7) is abnormal in the call request packet and requests call release to the calling party (63). If normal, the X.75 call request packet is configured with the logical channel number (72), the call request packet is transmitted to the relay destination exchange (73), and a 180-second timer is used to monitor the response time of the call connection packet. To drive (74).

8 is a flowchart illustrating a receiver side processing procedure when receiving an X.75 call connection packet according to the present invention.

After transmitting the call request packet to the relay destination exchange (73), and receiving the X.75 call connection packet from the relay destination exchange (75), the incoming call identification number is found using the incoming link and the logical channel number, and the call processing state is obtained. In step 76, it is determined whether the receiver party is in a call waiting state.

If the call processing state is not waiting for the called party's call connection packet, the packet is released (77). If the call processing state is the waiting state for the called party's call connection packet, the main body transmits the horn access packet to PICCt (7). Verify (78).

PICCt (7) requests a packet call release process if the verification result (79) is abnormal (77), and if it is normal, the PICCt (7) determines the destination flow control variable and transmits it to P75Ht (80).

P75Ht (5) assigns (81) the outgoing packet for the called party packet according to the flow control variable transmitted from PICCt (7) (82) and confirms the assignment result (82).

If the assignment is unsuccessful, the packet call is released (77). If the assignment is successful, the destination data packet exchange-related variables are initialized (83), the transmission for the control packet is released, and the incoming call table is cleared. After completion (84), an internal call connection packet is configured (85) and an internal call connection packet is transmitted to the calling party P75Ho (86). Then, the call processing status is changed to the packet data transfer state to exchange the data packet. Begin (87).

9 is a flowchart illustrating an originating process when receiving an X.75 call connection packet according to the present invention.

When the calling party P75Ho (4) receives the call connection packet from the called party P75Ht (5) (88), it uses the internal protocol call identification number to find out the calling packet call identification number (89). In step 90, it is confirmed whether or not the reception is waiting.

If the call processing status is not in the call waiting state of the calling party connection packet, the call is released (91). If the call processing status is the waiting state of the calling party connection packet reception, the called party flow control variable is transferred to (PICCo) (6). The controller determines the flow control variable of the calling party (92), and compares the data size of the calling party and the called party, and decides whether to exchange data packets at the calling party, collect and reconstruct them, and exchange them as they are. (93).

Accordingly, the origination of the originating data packet is allocated (94), and if the allocation result 95 is unsuccessful, the packet call is released (91). If the allocation result (95) is successful, the originating data packet exchange related parameters are initialized. (96) release the control packet origination, complete the originating call processing table (7), construct an X.75 call connection packet (98) and send it to the originating relay exchange (99); The packet relay call setup is completed by changing the state to the packet data transfer state (100).

Therefore, the present invention made as described above can realize the relaying of the packet exchange in the integrated information communication network by performing the connection according to the X.75 protocol during the integrated information communication network switching period, and optimally distributes the packet analysis, verification and conversion functions. Minimize the process of setting control packet, maintain the call processing state of all packet relay calls with uniquely assigned call identifier according to link number and logical channel number, and allocate call processing resources to process packet relay call There is an effect that can maximize the ability.

Claims (7)

Source packet X.75 protocol processing block (P75Ho) (4) and destination packet X.75 connected to the packet relay link of the relay source exchange and the relay destination exchange to perform link layer processing and packet exchange of the X.75 protocol. Packet handling module (PHM) (3) including protocol processing block (P75Ht) (5), and originating packet network interworking call control block (PICCo) that performs packet verification and logical channel management at the source and destination. 6) and a packet layer control processor (PLCP) including a destination packet network interworking call control block PICCt (7) and a packet call direction control block for performing call progress control according to a packet call setup request ( Connection exchange processor for packet exchange including PDC: Packet call Direction Control (8) and Packet Outgoing Call Control (POC) (9) that controls the establishment and release of fixed paths and selects relay routes. ASP-P: Access Switchi In the packet relay call setup method applied to an all-in-one telecommunications network switch for packet exchange having a ng Processor for Packet (1), when an X.75 call request packet is received from a relay originating exchange, A first step (41 to 51) for assigning, assigning origination for the origination table and control packet, verifying the origination signal analysis and network utility, and requesting link establishment by requesting number translation; Receiving the number translation result, after selecting the route according to the state of the relay rouen, requesting the call control of the called party to select the relay link, and transmitting the called party PHM number and the link number to the calling process (52 to 52). 55); The originating process includes a third step (56 to 60) storing the called PHM number and the link number delivered from the called party, and constructing an internal transmission call request packet to the called party; When the call request packet for the internal transmission is received from the calling party, the caller identification number and the internal call identification number are assigned, the caller for the incoming call table and the control packet are allocated, the calling party information is stored, and the header of the call request packet is stored. A fourth step (61 through 74) of verifying the network utility by separating the network utility, constructing a call request packet, and transmitting it to the relay destination exchange; When a call connection packet is received as a response to the call request packet from the relay destination exchange, the call connection packet is verified, the called party flow control variable is determined, the call destination for the called party data packet is allocated, and then the call connection for the internal transmission is performed. A fifth step (75 to 87) of constructing a packet and transmitting it to the calling party; And upon receipt of an internal transmission call connection packet from the called party, determine an originating flow control variable, determine the size of the packet to be transmitted, assign an origination for the originating data packet, and construct an originating call connection packet. A sixth step (88 to 100) of transmitting to the relay originating exchange; Packet relay call setting method comprising a. 2. The method of claim 1, wherein the first steps (41 to 51), when the originating packet X.25 protocol processing block (P75Ho) receives the X.75 call request packet from the relay originating exchange, the originating link and logical channel number. A seventh step (41, 42) of confirming a new call authorization with reference; In the seventh step (41, 42), if it is not a new call, the X.75 call request packet is disregarded or released according to the call processing state, and in the case of a new call, a caller identification number is assigned and call processing information is assigned. An eighth step (43 to 46) of allocating the originating call table and the control packet for managing to confirm whether the allocation result is successful; And if the allocation of the calling signal table or the control packet buffer fails due to the depletion of call processing resources in the eighth step (43 to 46), the call is released. After separating the call request packet header and sending the packet body to the PICCo (6), the call processing status is changed to the 'calling side of the call setup packet processing' state, and the PICCo (6) sends the call from the P75Ho (4). After verifying the network utility by analyzing the originating and terminating number of the request packet body, if the abnormality of the verification result is found, P75Ho (4) is requested to release the call, and if it is normal, PDC (8) requests packet call control. Nine steps (47-51); Packet relay call setting method of a total information communication network switch comprising a. 2. The second step (52 to 55) according to claim 1, wherein the PDC (8) transmits a number translation to a number translation software block (NTR: Number TRanslation) when the PDC 8 receives a packet call control request from (PICCo) 6. A seventh step (52, 53) requesting the called party call control to the packet layer control processor (PLCP) 2, which requests and confirms that it is a packet relay call, selects an appropriate route according to the state of the relay route, and manages the route. ); And after performing the seventh steps 52 and 53, the called party packet layer control processor (PLCP) 2 generates the called party packet network interworking call control process (PICCt) 7, and the PICCt 7 is the relay route. An eighth step (54, 55) of selecting a relay link in consideration of heavy load distribution and notifying the called party's packet processing module (PHM) number and the link number to a calling party's packet network interworking call control process (PICCo); A method for setting a packet relay call of an integrated information communication network switch. The method of claim 1, wherein the third steps 56 to 60 are performed by the originating packet network interworking call control process (PICCo) 6 from the destination packet network interworking call control process (PICCt) (7). Upon reception, the called party's packet processing module (PHM) number and link number are forwarded to the P75Ho along with the call request packet verification result to store the called party's call processing information, and the P75Ho (4) stores the header and PICCo stored in the control packet origination. After combining the packet body delivered from (6) to construct an internal transmission call request packet, transmit the internal call request packet to the called party's P75Ht, and change the call processing status to 'waiting to receive call connection packet'. Method for setting a packet relay call of the integrated information communication network switch, characterized in that made. The method of claim 1, wherein the fourth steps (61 to 74) refer to the called link and the logical channel number when the destination packet X.75 protocol processing block (P75Ht) receives an internal transmission call request packet from the source P75Ho. A seventh step (61, 62) of confirming a new call; If the call is not a new call in the seventh step (61, 62), the call request packet is ignored or the call is released to the calling party according to the call processing state, and if the call is new, the incoming call is referred to with reference to the called link and logical channel number. An eighth step (63 to 66) for assigning an identification number and allocating an incoming call table for processing call processing information and a control packet buffer to confirm the allocation result; In the eighth step (63 to 66), if the table or control packet buffer fails to allocate due to the depletion of call processing resources, call release is requested to the calling party. If the allocation is successful, the calling party calling information is called. After storing in the table, the header of the call request packet is separated, the packet body is transferred to the PICCt (7), and the call processing status is changed to 'waiting for receiving call connection packet'. The process (PICCt) (7) analyzes the call request packet body delivered from (P75Ht) (5) to verify the network utility and passes the result to P75Ht (5), P75Ht (5) from PICCt (7) A ninth step (67 to 71) of analyzing the delivered verification result; And if the verification result is abnormal in the call request packet in the ninth step (67 to 71), release the call for the incoming call table and the control packet, request the call release to the calling party, and if it is normal, the called logical channel A tenth step (72 to 74) for constructing an X.75 call request packet with a number, and then transmitting a call request packet to a relay destination exchange and driving a timer for monitoring a response time of the call connection packet; A packet relay call setting method of an integrated information communication network switch. 5. The method of claim 1, wherein the fifth step (75 to 87), when the P75Ht (5) receives the X.75 call connection packet from the relay destination exchange to determine the incoming call identification number using the destination link and the logical channel number. A seventh step (75,76) of checking whether the call processing state is a waiting state for a called party call packet reception; if the call processing state is not a waiting state for a called party call packet in the seventh step (75,76); When the call processing is released and the call processing state is waiting to receive the called party's call connection packet, the body of the call connection packet is transferred to PICCt (7) to verify the network utility. And if it is normal, determine and forward the called party's flow control variable, and P75Ht (5) assigns an origination for the called party's data packet according to the flow control variable transmitted from PICCt (7) to confirm the allocation result. Step (in 77 G 82); And if the allocation result is failure in the eighth step (77 to 82), release the packet call; if the allocation result is success, initialize the receiving data packet exchange related variables, release the control packet transmission; After completing the incoming call table, constructing a call connection packet for internal transmission to transmit the internal call connection packet to the calling party P75Ho, and then changing the call processing state to the packet data transfer state (83 to 87): Packet relay call setting method of a total information communication network switch comprising a. The method of claim 1, wherein the sixth step (88 to 100), when the calling party P75Ho (4) receives the call connection packet from the called party P75Ht (5), uses the internal protocol call identification number to set the calling packet call identification number. A seventh step (88 to 90) of finding out and confirming whether the call processing state is a call waiting state of a calling party connection packet; In the seventh step (88 to 90), if the call processing state is not waiting to receive the calling party connection packet, the call is released. If the call processing state is waiting to receive the calling party connection packet, the called party flow control variable is converted into PICCo. (6) determine the source flow control variable, compare the source and destination packet data size, and decide whether to exchange the data packet at the calling party, collect and reconstruct it, and exchange it as it is. An eighth step (91 to 95) for determining the allocation result by allocating an origination for the originating data packet after the determination; And in the eighth step (91 to 95), if the allocation result is unsuccessful, releases the packet call; if the allocation result is successful, initializes the calling data packet exchange related variables, releases the control packet, and releases the originating call. A ninth step (96 to 100) of constructing an X.75 call connection packet and completing the processing table and transmitting the packet to the originating relay exchange and changing the call processing state to the packet data transfer state; Packet relay call setting method of a total information communication network switch comprising a.