JPH0936911A - Packet exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely receive an important packet communication request by preventing congestion or avoiding the acception of packet processing from being disabled due to a fault by efficiently allocating plural packet trunks corresponding to the packet communication request in an extremely simple configuration. SOLUTION: A subscriber data memory circuit 3 registers subscriber data corresponding to a terminal to be housed from a terminal 4 for command input into a subscriber data memory 3. A state managing memory 1 periodically collects and monitors the working states of packet trunks (PKTT) 15a-15n. Namely, normal, fault and busy states or the like are managed as the states of the PKTT 15a-15n. A configuration managing memory 2 divides the PKTT 15a-15n into groups and manages them and a redundant PKTT group A is redundantly constituted to use #1(15a) and #2(15b) as the PKTT to be used for processing for extension housing packet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packet switch,
It relates to packet trunk allocation.

[0002]

2. Description of the Related Art When a packet processing device (specifically, for example, a packet trunk) is distributedly arranged in a conventional packet switch, the state of the packet processing devices distributed when a communication request with a terminal / public network is generated. If there is a packet processing device that can be investigated and used, the method is to use the packet processing devices evenly or in order.

[0003]

However, the service capacity (logical channel) of the terminal or line for which a connection request is made due to the occurrence of a failure of the packet processing device (packet trunk), congestion of the packet processing device, or the like. If there is no packet processing device that can process the packet, there is a problem that the available packet processing device is not allocated even if a connection request is made from a terminal or a line of high importance, and packet communication cannot be provided to the terminal.

For example, in FIG. 2, when the packet processing device PHM # 3 connected to the public network fails or is congested, the PHM # 1 and PHM # 2 are not in the system even if they are not obstructed or congested. Regardless, there is no packet processing device PHM that can provide the service capacity (the number of logical channels = 200) of the connection line to the public network, so that the packet communication link cannot be set and the packet communication cannot be provided.

Specifically, the terminal A (logical channel = 12
The logical channel for 0) is accommodated in the memory of PHM # 1, and the logical channel for terminal B (logical channel = 80) is also accommodated in the memory circuit of PHM # 1, leaving 55 vacant channels. Furthermore, when the accommodation request of the terminal C (logical channel = 100) is given, the PHM
The memory circuit of # 1 cannot be accommodated because there are 55 channels available. Therefore, it is accommodated in the memory circuit of PHM # 2, and there are 155 free channels left. However, even if an attempt is made to accommodate the logical channel = 200 of the public network, it cannot be accommodated because there is no space in any of the PHM # 1 and # 2 memory circuits.

That is, in the conventional packet processing system, (1) irrespective of the priority of packet communication (the importance of the line and the accommodation terminal), the packet processing device PHM (packet trunk) in the exchange is arranged in the order in which the communication requests are issued. : PKT
T) is used, even if the packet processing device PHM is not a failure or congestion, the available packet processing devices PHM of the logical channels for the connection request are immediately removed in the order of the communication request, and a new packet communication request is issued. It may be difficult to deal with.

(2) Further, the packet processing device PHM (packet trunk:
Since the PKTT) is used, the packet processing device PH
When M is a failure or congestion, the redundantly prepared packet processing device PHM is used by allocating it to the terminal or line that has made a communication request earlier, so it cannot be used when a connection request is made from a special important line. is there.

From the above, it is important to efficiently allocate a plurality of packet trunks to packet communication requests with a very simple structure to prevent congestion and unacceptable packet processing due to failures. There is a demand for providing a packet switch that can reliably receive a packet communication request.

[0009]

SUMMARY OF THE INVENTION Therefore, the present invention is a packet switch for packet processing packets from a plurality of terminals or lines by any one of a plurality of packet trunks. It is provided with "management means" for grouping and managing, and "registration means" for registering accommodation target information for a terminal or line to be accommodated and for registering correspondence with the group. Further, the packet switch of the present invention, when a packet communication request is given from a terminal or a line, searches the accommodation target information corresponding to the terminal or the line, and the corresponding packet from the accommodation target information obtained by this search. "Decision means" for selecting a trunk group, searching for the "management means" from the selected group, and determining a packet trunk for packet processing for the packet communication request
The above-mentioned problems are solved by providing the above.

[0010]

According to the configuration of the present invention, the degree of importance (eg, important or non-important) to the terminal or line accommodating the plurality of packet trunks mounted in the packet switch, the intended use (eg, extension line correspondence, external line) Correspondence), information such as the number of terminals or lines to be accommodated is grouped and managed in advance as a determining factor.

Further, the registration means preliminarily registers the accommodation target information for the accommodated terminal or line so that the correspondence with the group can be understood. As the accommodation target information, it is preferable to register a group number or a group code corresponding to the grouping in order to select an optimum packet trunk. It is practically preferable to register the communication speed information, packet size information, subscriber number or line number for the accommodation terminal or accommodation line together.

In addition to the above management means and registration means, when the decision means gives a packet communication request from the terminal or line, the accommodation target information corresponding to the terminal or line is searched, A corresponding packet trunk group is selected from the accommodation target information obtained by this search, the management means is searched from the group, and the packet trunk for performing the packet processing for the packet communication request is determined.

Therefore, it is possible to prevent a shortage of available packet processing devices as in the prior art, and to efficiently allocate a plurality of packet trunks to packet communication requests with a very simple structure. As a result, it is possible to avoid unacceptable reception of packet processing due to a failure and to reliably receive an important packet communication request.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial functional block diagram of an example of a packet switch for realizing the present invention. In FIG. 1, the packet switch of the present embodiment mainly includes a central processing module (CPM) 10, a time division switch (TSW) 11,
Highway interface control circuit (HWIC) 12
And the basic late interface extension circuit (BRI
S) 14a to 14n and a packet trunk (PKTT)
It is composed of 15a to 15n, a terminal A, and a command input terminal 4. The actual hardware configuration of the packet switch is as shown in FIG. 3, which will be described later.
In FIG. 1, a description will be given centering on the functional components that are characteristic of the present invention.

In FIG. 1, what is characteristic is the internal functional configuration of the central processing module 10. The central processing module 10 is provided with a state management memory 1 for managing the operating states of the packet trunks 15a to 15n mounted in the packet switch, and the subscriber data such as lines or terminals accommodated in the packet switch is operated by the packet switch. A subscriber data memory circuit 3 for storing at start-up or for adding / changing during operation is provided, and processing of a packet from a terminal or a public network is performed by any of the packet trunks 15a to 15n in the packet switch. The configuration management memory 2 manages the packet trunk by grouping whether to process the packet.

The subscriber data memory circuit 3 receives data from the command input terminal 4 when the packet switch is started up.
Subscriber data for the accommodated terminal is registered in the subscriber data memory 3 via the I / O controller 5.
An example of this subscriber data is shown in FIG. In FIG. 5, for example, the accommodated data terminal A is set as an important terminal (for example, a terminal for emergency contact), a subscriber number of the terminal, communication parameters (for example, communication speed, packet size, etc.), and an important group. to register. Similarly, for example, the line from the public network as a general line,
For example, register as group B. Also at this time, communication parameters and subscriber numbers are set.

The state management memory 1 is a packet trunk 1
The operating states of 5a to 15n are periodically collected based on the notification from the highway interface control circuit (HWIC) 12, and the operating state is monitored. That is, the packet trunks (PKTT) 15a to 15n are in the normal (NM) state.
The state management memory 1 manages states such as L), failure (FLT), and busy (BSY) (no free memory).

The configuration management memory 2 is a packet trunk 1
5a to 15n are divided into groups and managed.
For example, the redundant PKTT group A has a packet trunk # 1 (1) as a packet trunk used for processing the extension accommodation packet.
5a) and # 2 (15b) are used as a redundant configuration. Further, the redundancy group B is # 3 (15) as a packet trunk used for packet processing with the public network.
c) and the group # 6 (15f) are used. Furthermore, the important group is # 4 (15) as a packet trunk used for processing packets of important terminals.
d) and # 5 (15e) are used to form a redundant configuration.

The group configuration of the configuration management memory 2 is as follows.
Even when the packet switch is operating, the configuration management memory circuit 2 of the central processing module 10 can be changed by an instruction from the command input terminal 4.
That is, even if the memory contents are temporarily rewritten by the operation of the central processing module 10 while the packet trunks 15a to 15n are performing packet processing, they can be processed based on a new group configuration in the processing of the next cycle for the packet. It does not cause a problem.

Further, by grouping the packet trunks 15a to 15n by the configuration management memory 2,
To solve the conventional problem of not being able to respond to new packet communication requests because there is no longer any packet trunk that can use the logical channel for connection request even if the packet trunk is not faulty or congested. It contributes. In addition, it was a conventional problem,
It also contributes to solving the problem of not being able to handle a connection request from a special important line.

Like the configuration management memory 2 described above, the subscriber data memory circuit 3 also adds or changes subscriber data based on an instruction from the command input terminal 4 even when the packet switch is operating. It can be easily done.

(Operation): Next, the operation of FIG. 1 will be described. First, when the system of the packet switch is constructed (when the operation is started), the above-mentioned subscriber data is registered in the subscriber data memory circuit 3 via the I / O controller 5 by an online command from the command input terminal 4. In addition, online commands can be used to organize (assign) the above group structure.
Data (group number and packet trunk number) for the configuration management memory 2 via the I / O controller 5.
Register to

When the subscriber data and the group data for configuration management are registered as described above, the packet communication request from the terminal or the public network line which has made the packet communication request based on these registration data. Packet processing for

Therefore, a packet communication request is sent from the terminal A, which is an extension, to the basic late interface extension circuit 14.
When given to a, this packet communication request is given to the highway interface control circuit 12. The highway interface control circuit 12 causes the processor MP to search the subscriber data memory 3 in order to confirm the subscriber data of the terminal A that has made a packet communication request. When this search confirms that the data terminal A is the important terminal as shown in FIG. 5, the processing processor MP recognizes that the packet trunk of the important group is used.
Then, the processor MP searches the configuration management memory 2 and selects a packet trunk that can be used in the important group C as PKTT # 4 (5a) or # 5 (15b).

For example, when the packet trunk PKTT # 4 (15a) is selected as the important group C, the processing processor MP confirms in the state management memory 1 whether or not this packet trunk can be used. If the packet trunk PKTT # 4 (15a) is normal as a result of this confirmation and the number of free logical channels (service capacity) satisfies the number of logical channels of the terminal A, the processing processor MP determines that the time division switch 11 Packet trunk PKTT # 4 (15a) via the highway interface control circuit 12
Then, the packet communication link of the terminal A is set up and the packet processing is performed.

In addition, a packet communication request from the public network line may be transmitted by the primary late interface trunk (PRI).
T) 13, the subscriber data memory 3 is confirmed in the same manner as described above, and when it is confirmed that the processing group for the public network is a group as shown in FIG. Confirm. In this confirmation, the packet trunk number registered in the redundancy group B is confirmed, and if it is confirmed that it is the packet trunk PKTT # 3 (15c), for example, this packet trunk is normal and
It is judged whether or not the number of free logical channels satisfies the number of logical channels capable of processing the packet communication request from the public network. If not, another packet trunk PKTT # 6 registered in the redundancy group B is determined. Select.

Therefore, the state management memory 1 confirms whether or not the packet trunk is normal and the number of free logical channels satisfies the number of logical channels capable of processing the packet communication request from the public network. If it is determined that the packet trunk is satisfied, packet trunk PKTT # 6 (15f)
Is used, a packet communication link from the public network is set up, and packet processing is performed.

(Hardware Configuration): FIG. 3 is a diagram showing a hardware configuration of an example of a packet switch to which the present invention is applied. In FIG. 3, the packet switch includes a central processing module (CPM) 10, a time division switch (TSW) 11, and a line trunk device (LTE).
17, a packet switch (PKSW) 18, and a workstation 4A.

The line trunk device 17 includes a highway interface control circuit (HWIC) 12, a primary late interface trunk (PRIT) 13, and a basic late interface extension circuit (BRIS) 1.
4a to 14n and a packet trunk (PKTT) 15a
~ 15n and packet highway control circuit (PKHC)
16 and 16.

The workstation 4A realizes the command input terminal 4 of FIG. 1, and inputs subscriber data and group data for configuration management to the central processing module 10 by online commands. The central processing module 10 realizes the subscriber data memory 3, the state management memory 1, the configuration management memory 2 and the like described above, and exchanges data with the time divisional switch 11. Time division switch 1
Reference numeral 1 is for circuit switching and performs circuit switching between the highway interface control circuit 12 and the central processing module 10.

Highway interface control circuit 12
Performs transmission / reception of highway data PCM-multiplexed with the time division switch 11 and communication processing of call control information via a bus. The packet highway control circuit 16 controls multiplexing of packet frames from a trunk having a packet bus interface when performing packet switching. The packet switch 18 is a packet highway control circuit 1
Switching of fixed length frames multiplexed on H.6 is performed.

The packet trunks 15a to 15n perform packet protocol processing for D-channel mutual, B-channel mutual, and D-channel and B-channel packet switched connection. These packet trunks are grouped by the central processing module 10. It is managed separately. Basic late interface extension circuit 14a-
14n is an ISDN basic user / network interface S
This is an extension circuit that supplies points and accommodates various ISDN terminals (2B + D). The primary late interface trunk 13 is an office line trunk connected to the point T of the primary group speed interface of the INS 1500, and is a layer 1 or 2 layer.
It has a control function of.

FIG. 4 is a hardware configuration diagram of an example of the above-mentioned central processing module 10. In FIG. 4, the central processing module 10 is a microprocessor MP10.
a, program ROM 10b, working RAM 1
0c, a hard disk device DK10d, and an I / O (input / output) controller 5. The microprocessor MP10a is the processing processor M shown in FIG.
Program corresponding to P and stored in the program ROM 10b (Operating System, etc.)
Alternatively, the subscriber data input from the I / O controller 5 and the packet trunk grouping data are registered in the working RAM 10c using a program (such as an application program) stored in the hard disk device DK10d.

The signal of the operating state of the packet trunk is collected by the microprocessor MP10a and stored in the working RAM 10c. Working RA
M implements the subscriber data memory 3, state management memory 1, configuration management memory 2 and the like described above.

(Effects of Embodiment): According to the above embodiments, a plurality of packet trunks P that can be used.
Since the usable groups are assigned to the KTT according to the extension line, the public network line, the important line, etc., the problem as in the past can be prevented, and even if the packet trunk is occupied in the order of packet communication requests, It is possible to solve the important problem that there is no packet trunk that can be used when there is a packet communication request from an important line.

That is, the subscriber data of the terminals or lines to be accommodated is registered in advance, and the packet trunks are divided into groups according to the purpose of use or the importance of the terminals or lines to be accommodated in advance and registered in the configuration management memory. If a packet communication request is given, the subscriber data corresponding to this terminal or line is searched in the subscriber data memory, and the corresponding packet trunk group is selected from the subscriber data obtained by this search. Then, by searching the configuration management memory from the selected group and determining the packet trunk for packet processing for the packet communication request, packet processing can be performed very efficiently without causing congestion. .

An optimum packet trunk is selected by registering the group number or group code, communication speed information for the accommodation terminal or accommodation line, packet size information, subscriber number or line number, etc. as the subscriber data. Easy to do.

Further, by providing a state management memory for monitoring the operating states of the plurality of packet trunks, it is determined whether the packet trunks of the assigned group can be occupied by the packet processing, the remaining memory amount, etc. If it is determined that the packet trunk can be occupied, the packet trunk is occupied, and if it is determined that the packet trunk cannot be occupied, the packet trunk is selected by confirming the possibility of occupation of another packet trunk in the same group. Can be done efficiently.

From the above, a plurality of packet trunks can be efficiently allocated to packet communication requests with a very simple structure to prevent congestion and unacceptability of packet processing due to a failure. It is possible to realize a packet switch that can reliably receive a packet communication request.

Other Embodiments: (1) In the above embodiment, the grouping is performed by the importance of the terminal or line to be accommodated, the usage purpose of the terminal or line to be accommodated, the number of terminals or lines to be accommodated. By using such information as a determinant, it is possible to realize a highly practical packet switch with high performance.

For example, each department can be divided into groups. Since the data of such grouping can be changed even during the operation, it can be changed without stopping the operation of the exchange.

(2) Further, the hardware configuration diagrams of FIGS. 3 and 4 described above are examples, and as another hardware configuration, for example, a magnetic disk device or the like may be mounted to store various data. You may comprise.

(3) Further, in FIG.
It is also preferable to have an office line trunk that connects to the four basic interface T points.

(4) Furthermore, the packet switch of the above-described embodiment is used in a financial system (ATM system) or the like to register a communication line for depositing and withdrawing money as an important line, and to perform other office work. By registering the line for communication as a non-important line, even if the number of non-important packet communication requests increases, it is possible to always ensure the important line and to respond to the packet communication request from the important line. The packet trunk can be secured reliably.

[0045]

As described above, according to the present invention, the management means for managing the plurality of packet trunks for processing packets by grouping, and the accommodation target information for the terminals or lines to be accommodated are registered together with the group. When the packet communication request is given from the terminal or line, the accommodation target information corresponding to the terminal or line is searched, and the accommodation target information obtained by this search is searched. It is provided with a deciding means for selecting a corresponding packet trunk group, searching the managing means from the selected group, and deciding a packet trunk for packet processing for the packet communication request.

By adopting such a structure, a plurality of packet trunks can be efficiently allocated to packet communication requests with a very simple structure to avoid congestion and unacceptable packet processing due to a failure. It is possible to realize a packet switch that can reliably receive an important packet communication request.

[Brief description of drawings]

FIG. 1 is a partial functional configuration diagram of a packet switch according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a problem of a conventional packet switching process.

FIG. 3 is a hardware configuration diagram of an example of a packet switch of the embodiment.

FIG. 4 is a hardware configuration diagram of an example of a central processing module (CPM) of the packet switch according to the embodiment.

FIG. 5 is a configuration diagram of subscriber data according to the embodiment.

[Explanation of symbols]

1 ... Status management memory, 2 ... Configuration management memory, 3 ... Subscriber data memory, 4 ... Command input terminal, 5 ... I / O controller, 10 ... Central processing module (CPM), 1
1 ... Time division switch, 12 ... Highway interface control circuit (HWIC), 13 ... Primary late interface trunk (PRIT), 14 ... Basic late interface extension circuit (BRIS), 15 ... Packet trunk (PKTT).

Claims (4)

[Claims] 1. A packet switch for packet processing packets from a plurality of terminals or lines by any of a plurality of packet trunks, and managing means for grouping and managing the plurality of packet trunks for processing the packets. And registration means for registering accommodation target information for the accommodated terminal or line and for registering correspondence with the group, and when a packet communication request is given from the terminal or line The accommodation target information is searched, a corresponding packet trunk group is selected from the accommodation target information obtained by this search, the management means is searched from the selected group, and packet processing for the packet communication request is performed. A packet-determining means for determining a packet trunk to be performed. Ket exchange machine. 2. The grouping of the management means includes information on the importance of the terminals or lines to be accommodated, information on the intended use of the terminals or lines to be accommodated, information on the number of terminals or lines to be accommodated, etc. 2. The grouping of the plurality of packet trunks is set in the management means by command input data during packet switching processing or while packet switching processing is stopped, using any one of the information as a deciding factor. Packet switch. 3. The packet switch according to claim 1, wherein the registration means registers a group number or a group code corresponding to the grouping as the accommodation target information. 4. A monitoring means for monitoring the operating states of the plurality of packet trunks is further provided, and whether or not the packet trunk determined by the determining means can be occupied by packet processing is determined from the monitoring result of the monitoring means. If it is determined that the packet trunk can be occupied, the packet trunk is occupied, and if it is determined that the packet trunk cannot be occupied, a confirmation means for confirming the possibility of occupation of another packet trunk in the same group is provided. The packet switch according to claim 1.