JPH06112974A - Packet exchange - Google Patents

Abstract

PURPOSE:To properly leave diagnostic information when packet connection is disable. CONSTITUTION:The exchange is provided with an exchange control section 11 connected between a network and a terminal equipment and implementing exchange control of a channel between the network and the terminal equipment, a primary storage means 23 and a secondary storage means 25 storing a call control packet processed by the exchange control section 11, a primary storage processing means 21 storing a call control packet from an incoming/outgoing call sent/received in the exchange control by the exchange control section 1 till line interruption to the primary storage means 23, a content identification means 22 detecting an interruption packet from a call control packet relating to the storage of the primary storage processing means 21 and identifying whether or not the packet is to be stored in the secondary storage means 25 based on the information of a detected interruption packet cause and a diagnostic code, and a secondary storage processing means 24 storing the call control packet to the secondary storage means 25 based on the identification result of the content identification means 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packet switch capable of accurately obtaining diagnostic information when packet connection is impossible.

[0002]

2. Description of the Related Art Conventionally, if a packet switch is unable to collect diagnostic information when packet connection is not possible, a method of collecting diagnostic information and the cause of disconnection of a disconnect packet displayed on a packet communication terminal is used as diagnostic information. And a method using a protocol monitor connected to a packet communication line.

[0003]

However, according to the method of collecting the disconnection cause and the diagnostic code of the disconnection packet displayed on the packet communication terminal to obtain the diagnostic information, only the information about a part of the disconnection packet is obtained. There is a problem that cannot be applied when the diagnosis can be made based on the information of the entire call control.

Further, in the method using the protocol monitor, when the reproducibility of the phenomenon to be analyzed is low, it becomes difficult to see the contents of the call control packet in the phenomenon to be analyzed, and an accurate diagnosis cannot be performed. There was a point.

The present invention has been made to solve the above-mentioned problems of the conventional packet switch, and its object is to provide a packet switch capable of accurately collecting diagnostic information when a packet connection is impossible. Is.

[0006]

In the present invention, therefore, an exchange control unit which is connected between a network and a terminal and controls exchange of a communication path between the network and the terminal, and this exchange control unit are handled. Primary storage means and secondary storage means for accumulating the call control packets, and call control packets from the incoming and outgoing calls transmitted and received in the exchange control by the exchange control unit to the line disconnection are accumulated in the primary storage means. Primary storage processing means and
A content identification for detecting a disconnection packet in the call control packet for storage in the secondary storage processing means and for identifying whether or not to store in the secondary storage means based on the information on the disconnection cause of the detected disconnection packet and the diagnostic code. And a secondary storage processing means for storing the call control packet in the secondary storage means based on the identification result of the content identification means.

[0007]

According to the above structure, since the call control packets are accumulated from the incoming call to the disconnection, necessary diagnostic information is collected throughout the call control. Moreover, for each call control, only the necessary call control packets, such as analysis, etc., are selectively accumulated from the disconnection cause and the diagnostic code, and are secondary stored, so that the storage capacity can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2 shows a switching system using a packet switch. The packet switch 1 is an ISDN
Connected to the ISDN network via line 2 and ISDN line 4
Connected to the ISDN packet terminals 41 to 43 via
It is connected to the terminal adapter 51 via the ISDN line 5. A data terminal 52 is connected to the terminal adapter 51. The packet switch 1 has an ISD
The N primary group / basic interface 12 and the ISDN basic interface 13 are provided, and similarly, the provided exchange control unit 11 performs exchange control between them.
A call control packet management unit 14 is connected to the exchange control unit 11, and takes in a call control packet transmitted and received by the exchange control unit 11 to perform a primary accumulation and a secondary accumulation.

A more detailed block diagram of the call control packet manager 14 is shown in FIG. A series of call control packets from transmission / reception of transmission / reception of the exchange control unit 11 to disconnection are fetched by the primary accumulation processing means 21.

That is, in call control between the packet switch 1 and the ISDN network 3, as shown in FIG. 3, a call setup packet is transmitted at the time of an incoming / outgoing call to start call control, and a series of disconnection packets are transmitted. Since the call control of (3) ends, these are treated as a series by attaching the same identifier to them. The solid line in FIG. 3 indicates a call,
An alternate long and short dash line indicates an incoming call. The primary accumulation processing means 21 accumulates the series of fetched call control packets in a predetermined area of the primary storage means 23. The state thus accumulated in the primary storage means 23 is shown in FIG. At the same time, the primary accumulation processing means 21 sends out the series of fetched call control packets to the content identification means 22. The content identification means 22 detects a disconnect packet for the call control packet.

For example, as shown in FIG. 4, the disconnection packet includes an identifier, information indicating that the packet is a disconnection packet, a cause of disconnection, and a diagnostic code.
When the disconnection packet is detected, 2 retrieves the information of the disconnection cause and the diagnostic code that make up the content of this disconnection packet, and stores this information in the secondary storage previously stored in the identification table 22A. It is detected whether or not the information relating to the combination of the unnecessary disconnection cause and the diagnostic code matches, and if they do not match, an accumulation instruction is sent to the secondary accumulation processing means 24.

An example of the identification table 22A is shown in FIG. That is, in the identification table 22A, information relating to the combination of the disconnection cause and the diagnostic code when the secondary storage is not required is stored in a tabular form. When the secondary storage processing means 24 receives the storage instruction, the primary storage means 23 stores a series of call control packets from the corresponding outgoing / incoming call to disconnection.
It is read from and stored in the secondary storage means 25. FIG. 7 shows how call control packets are stored in the secondary storage means 25 in this manner.

The above-mentioned accumulation processing is actually executed by the CPU (not shown) of the packet switch 1 based on a program as shown in the flowchart of FIG.
First, the CPU monitors incoming and outgoing calls to and from the ISDN network 3 and waits for incoming and outgoing calls (801). When an incoming or outgoing call occurs, a call control packet corresponding to the identifier of the call is stored in the primary storage means 23 which is a temporary storage area (80
2) The process shifts to the detection of a disconnection packet (803). When a disconnection packet is detected, information on the disconnection cause and the diagnostic code is read from the packet (804), and the read information is compared with the information in the identification table 22A that does not need to store the call control packet. (805), it is detected whether the comparison result is a match or a mismatch (806). If they do not match, the corresponding call control packet is always stored in the storage area 2
The data is accumulated in the next storage means 25 (807), and if they match, the series of call control packets is discarded (808). Thus, only the call control packet necessary for diagnosis remains in the secondary storage means 25.

[0014]

As described above, according to the present invention, since the call control packets are accumulated, it is possible to obtain a series of information sufficient for analyzing the failure of the call control. In addition, since it is detected whether or not a series of call control packets are accumulated and left based on the cause of disconnection and the diagnostic code for the disconnection packet, there is no waste in accumulation and the capacity of the storage means can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of a system using a packet switch according to an embodiment of the present invention.

FIG. 3 is a diagram showing a transmission control procedure used in an embodiment of the present invention.

FIG. 4 is a diagram showing a configuration example of a call control packet.

FIG. 5 is a diagram of a memory map of an identification memory table.

FIG. 6 is a diagram of a memory map of primary storage means.

FIG. 7 is a diagram of a memory map of a secondary storage unit.

FIG. 8 is a flowchart for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

1 Packet switch 2, 4, 5
ISDN line 3 ISDN network 11 Switching control unit 12 ISDN primary group / basic interface 13 ISDN basic interface 14 Call control packet management unit 21 Primary storage processing means 22 Content identification means 22A Identification table 23 Primary storage means 24 Secondary storage processing Means 25 2 o'clock storage means

Claims (2)

[Claims] 1. A switching control unit which is connected between a network and a terminal and controls exchange of a communication path between the network and the terminal, and a call control packet which is handled by the switching control unit is stored in the primary. Storage means and secondary storage means; and primary storage processing means for storing, in the primary storage means, call control packets from the incoming and outgoing calls transmitted and received in the exchange control by the exchange control unit to the line disconnection. A disconnection packet is detected from the call control packets for storage by the primary storage processing means, and the above-mentioned 2 is performed based on the information on the disconnection cause and the diagnostic code of the detected disconnection packet.
Content identifying means for identifying whether or not to store the call control packet in the next storage means, and secondary storage processing means for storing the call control packet in the secondary storage means based on the identification result of the content identifying means. A packet switch equipped with. 2. The content identifying means is provided with a memory table storing a disconnection cause and a diagnostic code of a disconnection packet which does not need to be stored in the secondary storage means. Packet switch described.