JP3075317B2 - Policing violation notification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an ATM (Asynchronous
The present invention relates to a policing violation notifying apparatus that monitors a user's traffic volume in a transfer mode (Network) network and determines whether or not the traffic volume violates a contracted volume.

In an ATM network, a user (subscriber) reports required bandwidth and quality of a call to the network when a communication request is made. The network checks whether resources that satisfy the request of the call can be secured in the network along an appropriate route, and determines whether the call can be accepted. If the call is accepted,
A cell is transmitted from the user to the network according to the information amount of the call. At this time, the network is declared (contract)
UPC (Usa (Usa)
ge Parameter Control), and if there is a violation, take countermeasures such as discarding the offending cell.

As described above, in the ATM network, a policing technique for monitoring a cell flow of a user and judging whether or not the cell flow violates a contracted amount is used to protect the QOS (quality of service) of another user. Is also required. The present invention relates to such a technique.

[0004]

2. Description of the Related Art Since an ATM network is a new technology, a technology for monitoring and notifying a breach of a contract of the above-mentioned cell flow rate is currently under examination, but it is most generally considered as a policing violation notification method. This is a method in which the value of the cell flow rate that violates the contracted amount of the user is notified as it is.

FIG. 10 is a diagram for explaining this method. In the figure, the horizontal axis represents time t (sec), the vertical axis is the number of cells, characteristic A
Represents the cell flow rate of a certain user (the number of cells flowing per t seconds). Here, the number X of cells flowing per time T is defined as a prescribed amount contracted by the user. If the cell flow rate per T second of the user exceeds the specified amount X, it is a violation, and the excess ΔX is the number of violating cells. As the policing violation notification information, the number of violating cells ΔX is notified as it is.

[0006]

In the ATM network, the cell flow rate is monitored for each virtual path (VP) or virtual channel (VC). Since the number of virtual paths or virtual channels is very large, in the method of notifying the violating cell flow for each virtual path or virtual channel, the amount of information for violating notification is the number of bits for displaying the violating cell flow × There is a problem that the number of virtual paths or virtual channels becomes very large.

The present invention has been made in view of such a problem, and an object of the present invention is to reduce the amount of information for policing violation notification.

[0008]

Figure 1 [Means for Solving the Problems] The Ru principle diagram der according to the present invention.

[0009] policing violation notification device of the present invention, the first
As a form of the above, the violating cell flow exceeding the contracted amount of the user is divided into a plurality of levels by a plurality of thresholds, and the cell flow of the user is monitored, and if there is a violating cell flow, the violating cell flow is set to the above-mentioned plurality. In this case, it is determined which one of the stages corresponds to the information, and the information of the corresponding stage is notified.

[0010] The policing violation notifying device of the present invention comprises:
As a second mode, a threshold value is set for the ratio of the violating cell flow rate to the contracted amount of the user, and the cell flow rate of the user is monitored, and if the ratio exceeds the threshold value, it is determined that there is a violation. This is to notify.

Further, the policing violation notifying device of the present invention
As a third mode, the ratio of the violating cell flow rate to the contracted amount of the user is divided into a plurality of stages by a plurality of thresholds, and the cell flow rate of the user is monitored, and the ratio corresponds to any of the plurality of stages. Is determined, and information of the corresponding stage is notified.

Further, the policing violation notifying device according to the first to third embodiments can be configured so that the threshold value can be arbitrarily changed by a soft strap from the monitoring and control system.

[0013]

The policing violation notifying apparatus according to the first embodiment monitors the cell flow rate of the user and, when there is a violation cell flow rate, determines which of the plurality of steps the violation cell flow rate corresponds to, Since the information of the corresponding stage is notified, only the information for displaying the stage is sufficient as the violation notification information, and the amount of the violation notification information is much larger than when notifying the number of violating cells themselves. Can be reduced.

In the policing violation notifying apparatus of the second embodiment, there is a violation when the cell flow rate of the user is monitored and the ratio of the violating cell flow rate to the contracted quantity exceeds the threshold value. Therefore, the violation notification only needs to be information indicating whether or not there is a violation, and the amount of violation notification information can be greatly reduced.

In a policing violation notifying apparatus according to a third aspect, a cell flow rate of a user is monitored to determine which of the plurality of steps the ratio of the violating cell flow rate to the contracted amount of the user corresponds to. Judgment and information of the corresponding stage are notified, so only the information for indicating the stage is sufficient as the violation notification information, and the violation notification information is compared with the case of notifying the number of violating cells themselves. The amount can be greatly reduced.

Further, the threshold value can be arbitrarily changed by a soft strap from the monitoring and control system, so that flexible processing can be performed according to various situations of the cell flow. It becomes possible.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 2 shows a configuration example of a UPC (usage parameter control) unit equipped with various policing violation notification devices as embodiments of the present invention described below. In the figure, 1
, A UPC unit; and 2, a COM system (device monitoring control unit). A main signal (consisting of ATM cell streams of a plurality of users) is input to the UPC unit 1 as an insertion cell. This UPC
The unit 1 includes a policing unit 11, a cell counter 12, a threshold table 13, a comparing unit 14, a COM-system IF (interface) unit 15, and the like.

The policing unit 11 is a circuit which monitors an inserted cell (ATM cell) and outputs it as a passing cell. At the time of passing, the policing unit 11 determines the flow rate of the cell flow of each user in the main signal. Compared with the contracted amount of the user, if the contracted amount is violated in excess, a function of discarding the violated excess cell is provided.

The cell counter 12 is a circuit for counting, based on a signal from the policing unit 11, the cell flow rate of an inserted cell or the cell flow rate of a violating cell of each user in a main signal per fixed time T. . The threshold value table 13 is a table composed of a memory for holding various threshold values to be described later, and the contents thereof can be arbitrarily changed by a soft strap from the COM system 2. The comparing unit 14 is a circuit that compares the inserted cell flow rate (or violating cell flow rate) from the cell counter 12 with a predetermined threshold value of the threshold value table 13 and sends the comparison result to the COM IF unit 15.

The COM system IF unit 15 transmits the comparison result received from the comparison unit 14 to the COM system 2 and receives soft strap information from the COM system 2, for example, the UPC unit 1 and the C
An interface circuit for transmitting and receiving signals between the OM systems 2.

In the present invention, the UPC unit 1 is used to make various types of policing violation notifications described below.

A method in which a threshold value N is provided and a violation is notified when the cell flow rate at time T exceeds the threshold value N. FIG. 3 is a diagram for explaining this method.
The horizontal axis is time, the vertical axis is the number of cells, and characteristics A and B are examples of cell flow characteristics of a user. Here, the contract amount with the user is a prescribed amount X per time T.

Now, a threshold value N (that is, the number of cells flowing per time T is set to N) is set to slightly exceed the specified amount X per time T. And like characteristic B,
When the cell flow rate n per time T of the user is equal to or smaller than the threshold value N (that is, n ≦ N), it is determined that there is no violation. On the other hand, when the cell flow rate n per time T exceeds the threshold value N (that is, n <N) as in the characteristic A, it is determined that there is a violation. Then, only when the cell flow rate n exceeds the threshold value N at the latter time T, a signal of “1” is transmitted as the violation notification information to notify the COM system of the violation. In the case of the former, no notification of the violation is made. By doing so, the presence or absence of a violation can be notified by one bit as the violation notification information, and the violation notification information can be greatly reduced.

A method in which a plurality of threshold values are provided and a threshold value corresponding to the cell flow rate at time T is notified. FIG.
Is a diagram for explaining this method. The horizontal axis is time,
The vertical axis is the number of cells, and characteristics A and B are examples of cell flow characteristics of the user, respectively, and the contracted amount with the user is a specified amount X per time T.

As shown, a plurality of threshold values N _{0 to} N ₄
, The cell flow rate is divided into a plurality of stages, the threshold values N _{0 to} N ₄ are represented by 3-bit values “000” to “100”, which are used as notification information, and the cell flow rate n at time T
If the notification threshold N _i corresponding to, it can be compressed notification information amount. For example, the cell flow rate at the time T is the characteristic A
In the case of the characteristic B, it is between the thresholds N _{2 and} N ₃ , so that “011” is notified as the notification information. In the case of the characteristic B, since it is between the thresholds N _{0 and} N ₁ , As "00
1 "is notified.

A method in which a plurality of threshold values are provided and a threshold value corresponding to the offending cell flow rate at time T is notified.
FIG. 5 is a diagram for explaining this method. The horizontal axis is time, and the vertical axis is the number of cells. Characteristics A and B are examples of cell flow characteristics of a user, respectively, and the contract amount with the user is a prescribed amount X per time T.

As shown, a plurality of threshold values N _{0 to} N ₄
The flow rate of the violating cell (ie, the specified amount X
Are divided into a plurality of stages, and their threshold values N _{0 to} N ₄ are set to three-bit values “000” to “10”.
If the threshold value N _i is expressed as “0” and used as notification information and a threshold value N _i corresponding to the violation cell flow rate at the time T is notified, the violation notification information amount can be reduced. because between ₁ to N _2, notifies the "010" as the violation notification information, since in the case of characteristic B does not violate a below the threshold N _0, do not perform violation notification.

A method of converting a violating cell flow rate at time T into a violation rate, dividing the violation rate into a plurality of threshold levels, and notifying a corresponding threshold level.
The violation rate for a user is defined as follows. Violation rate = (number of violations / T ^* ) / (X _S / T _S ^* ) where the number of violations is a measured value of the number of violating cells of the user at time T, and T ^* is a main signal cell flow flowing during period T. X _S is a specified amount contracted by the user at the time T _S , and T _S ^* is a value converted into the number of cells of the main signal cell flow flowing during the time T _S.

Therefore, when the violation rate is 0, there is no violation cell, and when the violation rate is 1.0, the cell flow is twice as large as the cell flow contracted by the user. This violation rate is divided into 0.2 intervals, and the threshold levels “000” to “11” are set for each section.
In this case, when the threshold level is defined by the violation rate, the information amount notified to the COM system 2 is only 3 bits per virtual path identifier (VPI).

For example, the cell flow of VPI # 50 has a violation rate of 0.
0, the threshold level notified to the COM system 2 is “000”, and the cell flow of VPI # 100 has a violation rate of 0.35, and the threshold level notified to the COM system 2 is “000”. 010 "and the flow rate given by the VPI # 200 was the violation rate 1.2, so the threshold level notified to the COM system 2 is" 110 ". A method in which a threshold is set for the violation rate and a violation notification is made when the user cell flow exceeds the threshold. For example, a threshold value of 0.2 is provided, and when the violation rate of the cell amount of the user exceeds the threshold value of 0.2, a violation notification (one bit is sufficient) that a violation has occurred is performed.

Next, the operation of the above-mentioned UPC section 1 for implementing each of the above-described methods will be described with reference to FIGS. Here, FIG. 7 is a flowchart showing a policing processing flow in the UPC section 1, FIG. 8 is a flowchart showing an abnormality detection processing flow in the UPC section 1, and FIG. 9 is a flowchart showing a threshold level processing flow in the UPC section 1. .

In the policing process flow, when an ATM cell is inserted into the policing unit 11 (step S1), the processing in the policing unit 11 is performed (step S1).
2) It is determined whether the cell flow of the user violates the contracted amount (step S3). If there is a violation, the violation cell is discarded in the policing unit 11 and the number of violations is counted by the cell counter 12. If there is no violation, the inserted cell is output as a passing cell as it is. At this time, the number of passing cells is counted by a counter (not shown) in the policing unit 11.

First, the above method is implemented as follows according to the flow shown in FIG. A threshold value N is set in the threshold value table 13. Cell counter 12
Counts the cell flow rate n at the time T of the cell flow of each user (step S11). The comparing unit 14 compares the cell flow rate n of the cell counter 12 with the threshold value N of the threshold value table 13 (step S12), and when the cell flow rate n exceeds the threshold value N, through the COM system IF unit 15. CO
A notice of violation is sent to the M system 2 (step S
13).

The above system is also implemented in the same manner as the four systems. That is, a threshold having a violation rate is set in the threshold table 13. The comparing unit 14 calculates the violation rate of the cell flow of the user based on the information on the violated cell flow from the cell counter 12 and calculates the violation rate in the threshold table 1.
If the threshold value is exceeded by comparing with the threshold value of the violation rate from No. 3, a violation notification indicating that there is a violation is sent to the COM system 2 through the COM IF unit 15.

The above method is implemented as follows according to the flow shown in FIG. Threshold table 13
It is set threshold N ₀ to N ₄ in. The cell counter 12 counts the cell flow rate n at the time T of each user. The comparing unit 14 determines the cell flow rate n as a threshold value N ₀
Determine enter any of the threshold level to be partitioned in to N ₄ is converted to the threshold level (step S2
2), and notifies the COM system 2 of the threshold level information through the COM system IF unit 15.

The above method is also implemented in the same manner as the above method, except that the threshold value table 13 is set with threshold values N _{0 to} N ₄ for the number of violating cells, and the cell counter 12 is set at the time T of each user. The difference is that the violation cell flow rate is counted. The comparing unit 14 determines which of the threshold levels classified by the threshold values N _{0 to} N ₄ falls into this threshold cell flow, converts the violation cell flow rate into the threshold level, and converts the threshold level information into the threshold level information. To the COM system 2 through the COM system IF unit 15 as violation notification information.

The above method is implemented in the same manner as the above method, except that the threshold value table 13 is set with the threshold level of the violation rate with respect to the number of violating cells.
Is different in that it counts the number of violating cells at the time T of each user. The comparing unit 14 converts the violating cell flow rate into a violation rate, determines which of the threshold levels the violation rate falls into, and sends the threshold level information to the COM system 2 through the COM IF unit 15. Notify as violation notification information.

In these embodiments, the various threshold values of the threshold value table 13 can be arbitrarily rewritten by a soft strap from the COM system 2, and are thus flexible to various situations. Can be handled.

[0039]

As described above, according to the present invention, the amount of information for policing violation notification can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the principle according to the present invention.

FIG. 2 is a diagram illustrating a configuration example of a UPC unit equipped with various policing violation notification devices as an embodiment according to the present invention.

FIG. 3 is a diagram illustrating a policing violation notification method according to an embodiment of the present invention.

FIG. 4 is a diagram for explaining a policing violation notification method according to an embodiment of the present invention.

FIG. 5 is a diagram for explaining a policing violation notification method according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating a policing violation notification method according to an embodiment of the present invention.

FIG. 7 is a flowchart showing a policing process flow in the UPC section of the embodiment.

FIG. 8 is a flowchart illustrating an abnormality detection processing flow in the UPC unit according to the embodiment.

FIG. 9 is a flowchart showing a threshold level processing flow in the UPC section of the embodiment.

FIG. 10 is a diagram showing a conventional example.

[Explanation of symbols]

 1 UPC (Usage Parameter Control) Unit 2 COM System 11 Policing Unit 12 Cell Counter 13 Threshold Table 14 Comparison Unit 15 COM System Interface Unit

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor, Jinichi Yoshizawa 1015, Kamidadanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Hiroshi Takeo 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Naoaki Yamanaka 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Yoichi Sato 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References IEICE Spring Meeting 1992 B-692 (March 15, 1992) Technical Report of IEICE SS E90-119 (January 18, 1991) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04L 12/28 H04L 12/56

Claims (4)

(57) [Claims] 1. A violation cell flow rate exceeding a user's contracted quantity is divided into a plurality of levels by a plurality of thresholds, and a user's cell flow rate is monitored. A policing violation notifying device that determines which of a plurality of stages corresponds to, and notifies information of the corresponding stage. 2. A threshold value is set for a ratio of a violating cell flow rate to a contracted amount of a user, and a cell flow rate of the user is monitored, and when the ratio exceeds the threshold value, a notification that there is a violation is provided. Policing violation notification device . 3. A ratio of a violating cell flow rate to a contracted amount of a user is divided into a plurality of steps by a plurality of thresholds, and the cell flow rate of the user is monitored, and the ratio corresponds to any of the plurality of steps. A policing violation notifying device which determines whether the policing violation has occurred or not and notifies the corresponding stage of information. 4. A polishing violation notification apparatus according to any one of claims 1 to 3 as constructed can be changed at will soft strap above the threshold from the monitoring control system.