KR20010057112A - Method for monitoring data traffic transmitted in an internet interfacing unit in an exchange - Google Patents

Abstract

PURPOSE: A method for monitoring data traffic of an Internet interworking device of an exchanger is provided to efficiently manage resources to a telecommunication channel by performing automatic assignment function of a data telecommunication channel in the exchanger. CONSTITUTION: A data channel traffic assignment control part sets up critical traffic quantity assigned to a channel currently being used(210-240). A data traffic monitor process calculates the difference in data traffic quantity transmitted and received in a current channel and a previous channel(250-280). A data channel traffic monitor part monitors the calculated data traffic difference and the set critical traffic quantity. If the data traffic difference exceeds the critical traffic quantity, a new channel is additionally assigned to the currently assigned channel, and if the data traffic difference does not exceed the critical traffic quantity, the assigned channel is reduced(290-330).

Description

Method of monitoring data traffic of internet linkage device of exchange {METHOD FOR MONITORING DATA TRAFFIC TRANSMITTED IN AN INTERNET INTERFACING UNIT IN AN EXCHANGE}

The present invention relates to an Internet interworking device interworking with an Internet subscriber in a switch. More particularly, the present invention relates to an Internet interworking device interworking with an Internet subscriber. It is about how to control.

In recent years, integrated digital communication networks (ISDNs), which digitalize and construct subscriber lines based on digital telephone networks, have become popular. The ISDN subscriber's digital subscriber line logically uses a two-channel (2B channel) call channel (B channel) with a transmission rate of 64 kbits / sec. The AO / DI (always on dynamic ISDN) subscriber line is a 2B channel. A 2B + D channel is used by adding a common signal channel or information channel (D) on one line in k bits / second. The Internet linkage of next-generation exchanges based on ISDN, which is currently under development, has a data access control unit that manages up to 128 channels.

However, the data access control unit of the Internet-linked device does not know whether the bandwidth of the data traffic transmitted and received during the exchange period with the subscriber is appropriate or insufficient. In addition, although traffic has become a major cause of congestion of the exchanges in recent years due to the increase of Internet users, the data access control unit has no way to allocate higher bandwidth when the traffic is congested.

Therefore, an object of the present invention is to provide a method of controlling the bandwidth of a data channel by monitoring an amount of traffic transmitted and received between an exchange and a subscriber in an Internet interworking device.

According to the present invention for achieving the above object, the transmission and reception data traffic monitoring of the Internet-linked device for transmitting and receiving data with the ISDN subscriber connected by 2B channel and the AO / DI subscriber connected by AO / DI channel connected by 2B + D channel at the exchange. The method includes: setting a threshold traffic amount allocated to a channel currently in use; Calculating a difference between the amount of data traffic transmitted and received on a current and previous time channel over time; Monitoring whether the difference in the amount of data traffic exceeds the threshold; A channel that additionally allocates a new channel to the currently allocated channel when the difference in the amount of data traffic exceeds the threshold, and decreases and allocates the allocated channel when the difference in the amount of data traffic does not exceed the threshold. And an allocating step.

1 is a block diagram of an Internet interworking device of an exchange having a data traffic monitoring function configured according to the present invention;

2 is a detailed block diagram of the data access control unit shown in FIG. 1;

3A and 3B are flowcharts illustrating a data traffic monitoring method for channel addition allocation and allocated channel reduction allocation, respectively.

<Description of the symbols for the main parts of the drawings>

10 subscriber interface 20 data access control unit

22: PPP protocol unit 24: data channel bandwidth allocation control unit

26: data channel traffic monitor unit 28: shared memory

30: subscriber 50: Internet network

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

1 shows a block diagram of an Internet interworking apparatus 100 according to the present invention. The Internet interworking device 100 includes a subscriber interface 10 and a data access control (DAC) 20.

Each subscriber 30 and the switch's internet interworking device 100 use a point-to-point (PPP) protocol, and the switch's internet interlocking device 100 and the internet network 50 are TCP / IP. (transfer control protocol / internet protocol) protocol is used.

Each subscriber 30 is connected to the data access control unit 20 through the subscriber interface 10 of the Internet interworking device 100. In the case of an ISDN subscriber, the subscriber 30 uses a 2B channel composed of 0 to 127 channels. In the case of AO / DI (always ondynamic ISDN) subscribers, the subscriber station is connected to the subscriber 30 using 2B + D channels (128 channels + 13 channels).

The data access control unit 20 can be additionally expanded, interworking with each subscriber 30 according to the PPP protocol based on Q.931, and controlling the bandwidth by monitoring the traffic volume of the data channel. The data access control unit 20 includes a PPP protocol unit 22, a data channel bandwidth control unit 24, a data channel traffic monitor unit 26, and a memory 28.

The PPP protocol unit 22 establishes a link with the subscriber 30 using the PPP protocol. At this time, the information of the subscriber 30 and the number of channels or channel numbers being used are provided to the data channel bandwidth allocation control unit 24. . In this case, the information of the subscriber 30 is information on whether the subscriber 30 is an ISDN or AO / DI subscriber, information on the amount of data traffic transmitted and received through the channel in use from channels 0 to 127 of channel 2B, respectively. It includes information about the amount of data traffic of the bandwidth that the channel of the can afford.

The data channel bandwidth allocation control unit 24 stores the channel information of the subscriber 30 in the memory 28 which is shared with the data channel traffic monitoring unit 26, and the data channel traffic monitoring unit 26 stores the shared memory 28. Monitor the bandwidth of each channel based on what is stored in The result monitored by the data channel traffic monitor 26 is transferred back to the data channel bandwidth allocation control section 24, and the data channel bandwidth allocation control section 24 is currently used according to the monitoring result of the data channel traffic monitoring section 26. If the volume of sending / receiving data traffic of the current channel is congested, a new channel should be allocated to the channel currently in use. On the contrary, if the amount of sending / receiving data traffic of the currently used channel has enough space, the channel currently in use is spared. Reduce and allocate channels.

More specifically, the data channel bandwidth allocation control unit 24 and the data channel traffic monitor unit 26 share the information about the data channel through the shared memory 28 while the maximum channel bandwidth of the connected 2B or 2B + D channels is maximum. Share information about whether to perform a channel add using all the limits, or conversely, to perform a channel drop or whether both reduction and addition assignments are possible. Accordingly, the data channel traffic monitor unit 26 continuously monitors the channel set up with the above-described information from channel 0 to channel 128 to provide the data channel assignment control unit 24 with information on channel addition or channel reduction. .

Transmitting / receiving data traffic monitoring operation of the Internet interworking device 100 having the above-described configuration will be described in detail as follows with reference to the flowchart of FIG. 3A illustrating a process of adding a channel and a flowchart of FIG. do. Of course, it will be appreciated that the channel addition and channel reduction processes described in FIGS. 3A and 3B are performed simultaneously during data traffic monitoring.

First, a monitoring process for adding a channel of FIG. 3A will be described.

In step 210, the PPP protocol process 22 determines whether the channel currently being used uses up to 2B channel or up to D channel. This means that if you are using less than 0 to 127 channels, you are using the 2B channel, and if more than that, it will be determined to use the D channel. If only up to 2B channel is used, it is determined that it is the ISDN subscriber 30 and proceeds to step 220, and if it is more than that, it is determined that it is the AO / DI subscriber 30 and proceeds to step 230. In this case, the related information is transmitted to the data channel traffic allocation controller 24.

In step 220, the data channel traffic allocation controller 24 sets the appropriate number of channels in the shared memory 28 as a threshold. In this regard, the maximum channel that can be allocated for an ISDN subscriber is up to 128 channels.

On the other hand, in step 230, the data channel traffic allocation control unit 24 refers to the subscriber information provided from the PPP protocol process 22 to determine whether the subscriber 30 is registered as an AO / DI subscriber, and AO / DI If this is not a subscriber, the process ends. Otherwise, if it is an AO / DI subscriber, the process proceeds to step 240.

In step 240, the data channel traffic allocation control section 24 sets the appropriate number of channels in the shared memory 28 as a threshold as a threshold. In this regard, the bandwidth limit of the channel that can be allocated maximum for AO / DI subscribers is up to 142 (= 128 + 13) channels.

The data traffic monitor process 26 then reads the amount of up and down data traffic transmitted and received over the channel currently being established and in use (step 250), and then presets to detect how much data traffic increases. After a period of time, for example, about 1 second (step 260), the amount of down and up data traffic transmitted and received over the channel is again calculated (step 270).

In a subsequent step 280, the difference between the amount of data present, i.e., one second later, and the amount of data traffic in the past, i.e. one second ago, is calculated.

Next, the data channel traffic monitor 26 performs a monitoring process for comparing the calculated data traffic difference with the threshold set in step 220 or step 240 (step 290).

As a result of the comparison, when the data traffic difference value exceeds the threshold, it means that the channel currently in use is congested. Therefore, the number of monitoring is incremented by 1 to confirm how long the congestion is maintained (step 300). On the contrary, if the data traffic difference does not exceed the threshold, the currently used channel is not congested. Therefore, the channel is used as it is, the monitoring count is decremented by 1, and the monitoring process is terminated. 310).

In step 320, it is determined whether the number of monitoring exceeds a preset number of monitoring, for example, three times. In this case, if the number of monitoring does not exceed three times the preset number of monitoring, it means that data traffic has not continuously increased beyond the maximum usable bandwidth, which means that the currently allocated channel can be sufficiently handled. Thus, return to step 250 to initiate new monitoring.

However, if the number of monitoring exceeds three times the preset number of monitoring, it means that data traffic has continuously increased to reach a congestion state over the bandwidth of the currently allocated channel. Thus, this state is reported to the main processor (not shown) to further allocate the number of currently linked channels (step 330). At this time, the bandwidth of the additionally allocated channel is stored as a threshold value in the shared memory 28 through the data channel bandwidth allocation control unit 24.

3B is a flowchart illustrating a monitoring process for channel reduction. In step 490, a difference value is compared with a threshold value, and the channel reduction is performed when the difference value is less than a predetermined number of times (step 520). Except for the process performed in step 530, since the monitoring process for channel addition described in FIG. 3A is substantially the same, a detailed description thereof will be omitted.

Therefore, according to the present invention, if the data traffic amount of the data communication channel with the subscriber is monitored within the exchange, if the data traffic amount is monitored to increase over the bandwidth of the set channel, the maximum allocable channel bandwidth is additionally allocated, and vice versa. If the traffic volume is monitored to be reduced than the bandwidth of the set channel, the allocated channel bandwidth can be reduced and allocated to efficiently manage the resources for the communication channel.

Claims (2)

A method for monitoring data transmission / reception of an internetworking device that exchanges data with an ISDN subscriber connected through a 2B channel and an AO / DI subscriber connected through an AO / DI channel connected through a 2B + D channel, Setting a threshold traffic amount allocated to a channel currently in use; Calculating a difference value of the amount of data traffic transmitted / received over a current and previous time channel over time; Monitoring whether the difference in the amount of data traffic is greater or less than the threshold; When the difference value of the data traffic amount exceeds the threshold, a new channel is additionally allocated to the currently allocated channel, and when the difference value of the data traffic amount does not exceed the threshold value, the allocated channel is allocated. And a channel allocation step of reducing allocation. The method as claimed in claim 1, wherein the channel allocation step is performed when the number of monitoring occurs continuously by a predetermined number of times in the monitoring step.