JP3474092B2 - Exchange connection equipment - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange connecting device, and more particularly to a device which accommodates a plurality of subscriber lines having different line speeds and is connected to the exchange by a high speed line.

[0001]

2. Description of the Related Art In a device connected to a conventional exchange such as a frame relay exchange, when a plurality of subscriber lines having different line speeds are mixed and multiplexed and traffic of a certain subscriber line exceeds a guaranteed band, Since the guaranteed bandwidth of other subscriber lines is affected, processing such as reception stop was immediately performed.

[0002]

However, in general,
Even if communication is performed within the guaranteed band, the guaranteed band may be exceeded due to momentary traffic fluctuations.
Even in such a case, the conventional problem has been that the reception is immediately stopped.

Therefore, in view of the above problems, the present invention does not protect the guaranteed bandwidth in a device which accommodates a plurality of subscriber lines having different line speeds and is connected to the exchange by a high-speed line after considering statistically. The purpose is to suspend reception only on the subscriber line.

[0004]

In order to achieve the above-mentioned object, the exchange connection device according to the present invention, as shown in principle in FIG. 1, determines the data passage amount per unit time for each subscriber line. The statistical information management unit 1 for detecting, the memory unit 2 for holding the guaranteed bandwidth and the same identification value for each subscriber line, and each time each notification of the data passage amount is received from the statistical information management unit 1. The guaranteed bandwidth and the data passage amount for each private line are compared, and when the data passage amount exceeds the guaranteed bandwidth, the identification value is lowered and held in the memory unit 2, and the identification value is the minimum threshold value. When the data transmission amount falls within the guaranteed band, the identification value is increased and held in the memory unit 2, and when the data passage amount falls within the guaranteed band, Do not restart reception until the identification value rises above the minimum threshold A subscriber information management unit 3, and comprising the.

The basic concept of the present invention is to set an identification value, which is a numerical value capable of identifying that a communication exceeding the guaranteed bandwidth is made, to each subscriber line after considering statistically. This means that reception is not stopped until the value falls below a certain threshold.

That is, in the present invention, the statistical information management unit 1
Counts the amount of data passing through each line for a certain period of time,
The subscriber information management unit 3 is notified of the data passing amount as statistical information at regular intervals. On the other hand, the memory unit 2 holds the guaranteed band and the same identification value for each subscriber line.

The subscriber information management unit 3 is a statistical information management unit 1.
The data passing amount of each subscriber line notified from the above is compared with the guaranteed bandwidth of the subscriber line held in the memory unit 2. As a result, when the data passage amount> the guaranteed band, the identification value held in the memory unit 2 is lowered,
It is held in the memory unit 2. Then, when the identification value falls to the minimum threshold value held in the subscriber information management unit 3, the reception is stopped.

After that, when the data passage amount <the guaranteed band, the identification value is increased and then held in the memory unit 2. When the identification value becomes higher than the minimum threshold value for the subscriber line whose reception is stopped, reception is restarted, and reception is not restarted until then.

As described above, according to the present invention, the identification value is added to the subscriber line that has communicated beyond the guaranteed band without stopping the reception immediately, and thus the identification value becomes a certain value or less. Only when the reception is stopped.

Further, the subscriber information management section 3 may forcibly restart the reception of the subscriber line whose reception has been stopped after a certain period of time.

Further, the subscriber information management unit 3 can count the time of the reception suspension and, when the reception suspension time exceeds a predetermined time, reduce the guaranteed bandwidth of the subscriber line by a predetermined value.

As a result, for a subscriber line having a large amount of data passing, it is possible to continue reception with the guaranteed bandwidth reduced without immediately performing the reception stop operation.

Further, the subscriber information management unit 3 gives the guaranteed band and the initial value of the identification value to the memory unit 2 and also applies to the subscriber line where the identification value has not dropped for a predetermined time from the initial value. On the other hand, it is also possible to raise the identification value, and when the identification value reaches a predetermined maximum threshold value, increase the guaranteed bandwidth by a predetermined value for a fixed time.

As a result, the subscriber line can communicate with a capacity exceeding the previous band only while the guaranteed band is increased.

Further, the subscriber information management section 3 controls the subscriber line when the number of decrease of the identification value within a fixed time exceeds a predetermined value, even if the identification value does not decrease to the minimum threshold value. It is also possible to stop reception.

As a result, even before the identification value drops to the minimum threshold value, the reception can be stopped early depending on the degree of the drop.

Further, the subscriber information management unit 3 guarantees that the identification value is the predetermined maximum among all subscriber lines until the subscriber line resumes reception when the subscriber line is stopped. The bandwidth may be increased by the guaranteed bandwidth of the subscriber line whose reception is stopped.

Therefore, even if the guaranteed bandwidth is increased, the bandwidth of this subscriber line has more margin than before, so that even if communication beyond the previous bandwidth is performed, the identification value does not decrease, and efficiency is improved. Operation can be performed.

Further, when there are a plurality of subscriber lines whose reception has been stopped, the subscriber information management section 3 determines that the identification value is the highest among all the subscriber lines until the subscriber lines resume reception. The guaranteed bandwidth may be increased in order from the subscriber by the guaranteed bandwidth of the subscriber line whose reception is stopped.

Further, when there are a plurality of subscriber lines having the highest identification value among all the subscriber lines, the subscriber information management unit 3 sets the guaranteed bandwidth of the subscriber line whose reception is stopped to the highest value. It is also possible to distribute evenly by the number of subscribers.

[0021]

FIG. 2 is a block diagram of an embodiment of an exchange connecting device according to the present invention. In this embodiment, a frame relay exchange connecting device is shown. In addition, the statistical information management unit 1 receives the subscriber data from the subscriber lines L0 to L59, notifies the subscriber information management unit 3 of the data passage amount for each subscriber line, and receives the received data in the reception buffers 501 to 559. Accumulate.

The reception buffers 501 to 559 transfer the reception data to the frame relay exchange (not shown) via the memory transfer unit 6 and the transmission unit 7.

The memory unit 2 is composed of an identification value storage memory (RAM) 21 for each subscriber line and a subscriber information memory (RAM) 22 for storing the guaranteed bandwidth for each subscriber line. .

Further, the subscriber information management unit 3 compares the data passage amount notified from the statistical information management unit 1 with the identification value read from the memory 21 and / or the guaranteed bandwidth read from the memory 22 and transfers the data to the memory. A comparison unit 31 that controls reception / restart of the unit 6, a counter 32 that is used when performing this control, a ROM 33 that holds a predetermined maximum threshold value and a predetermined minimum threshold value in advance, and a timer 3
It is composed of 4 and.

Next, various operation examples (1) to (1) to be executed by the subscriber information management section 3 in such a configuration example will be described.
(8) will be described with reference to the flowcharts of FIGS. Embodiment (1): FIG. 3 First, the comparison unit 31 of the subscriber information management unit 3 sets a guaranteed bandwidth (contract bandwidth: 16, 64, 128, ..., 20 Kbps) for each of the subscriber lines L1 to L59 when the initial state is set. ) Is set in the subscriber information memory 22 (step S1), and the same identification value "10" is set in the identification value storage memory 21 for each subscriber line (step S2).

When the statistical information management unit 1 notifies the subscriber information management unit 3 of the amount of data passage for each subscriber line per fixed time (s) to the subscriber information management unit 3 every time t, the subscriber information management unit 3
Compares the amount of data passing for each subscriber line, which is the notification content from the statistical information management unit 1, with the guaranteed bandwidth held in the subscriber information memory 22 of each subscriber line (at step S3).

As a result, if the data passage amount is normal and the data passage amount ≦ guarantee band, the identification value storage memory 21
The identification value of the subscriber line X is read from and compared with the initial value (at step S4).

At this stage, the identification value has not changed yet and remains "10", so that the process returns to (step S3).

After that, when the data passage amount increases and the data passage amount> the guaranteed band, the subscriber line X is not in the reception stop state yet, so that the steps S3 to S8 are followed by the step S9. Then, the identification value held in the identification value storage memory 21 is lowered. In this example, it is lowered by "1" to "9".

Then, in step S10, it is compared with the minimum threshold value stored in the ROM 33. At this stage, the identification value is only decreased by "1", so the procedure returns to.

When a new notification is received from the statistical information management unit 1 after the time t, and the data passage amount> the guaranteed band is still satisfied, the identification value is further decreased by 1 (at step S9).

As described above, the statistical information management unit 1 is provided every time t.
The data passing amount received from the device is compared with the guaranteed band of each subscriber line. If the data passing amount> the guaranteed band, the identification value is lowered by one.

On the other hand, if the data passage amount ≦ guaranteed band, the process proceeds to step S4, where the identification value has already decreased from the initial value “10” (identification value <initial value).
In step S5, one identification value is returned. That is, the identification value is increased only for the subscriber line whose identification value has dropped from the state at the time of initial setting, and for the subscriber line whose identification value has not changed since the time of initial setting, Do not raise the value any further.

The subscriber information management unit 3 constantly monitors the state of the identification value of each subscriber line, and the identification value of the subscriber line is set to R in advance.
When the minimum threshold value "0" set in the OM 33 is reached, the memory transfer unit 6 is notified that the reception of the subscriber line is stopped (at steps S10 and S11).

The memory transfer unit 6 includes reception buffers 501 to 501.
The memory transfer from 559 to the transmitter 7 is stopped, and the subscriber line stops receiving.

The contents of statistical information received after the subscriber line has stopped receiving are compared with the guaranteed band, and when the data passage amount ≦ the guaranteed band, the identification value of the subscriber line is increased by 1 at the same time. , The subscriber information management unit 3 notifies the memory transfer unit 6 of the reception stop line to restart memory transfer,
The memory transfer unit 6 restarts the memory transfer to the transmission unit 7 (at steps S6 and S7).

Embodiment (2): FIG. 4 In this embodiment, the same is true until the reception is stopped (S11 of the same) after the embodiment (1), but when the memory transfer is stopped, the timer is used. (T) 34 is activated (S1 of the same)
2). Then, when the timer (T) times out after a fixed time, the subscriber information management unit 3 notifies the memory transfer unit 6 of the memory transfer restart, and the memory transfer unit 6 restarts the memory transfer to the transmission unit 7. (S13,14).

Embodiment (3): FIG. 5 In this embodiment, step S1 in Embodiment (1) is used.
5 to 19 are added.

That is, in the subscriber line X whose reception is stopped in step S8, the state (data passage amount> guaranteed band) (the number of times the program is executed) continues m times after the reception of the subscriber line is stopped. When continued (same S1
7, S18), the subscriber information management unit 3 sets the guaranteed bandwidth stored in the information memory 22 of each subscriber line to a predetermined value YKbps.
Only (step S19).

The subscriber line whose guaranteed bandwidth has been lowered is
After that, the amount of data passing, which is the notification content from the statistical information management unit 1, is compared with this guaranteed bandwidth.

As a result, with respect to a subscriber line having a large amount of data passing, reception is continued without reducing the guaranteed banding operation immediately.

Embodiment (4): FIG. 6 This embodiment is different from Embodiment (1) in steps S20-.
25 is added.

That is, first, the number P of times that the data passage amount is kept within the guaranteed band is initially set to "0" (S2
0), in the subscriber line whose data passage amount ≦ guaranteed band and whose identification value is “10” at the time of initial setting (Y in step S4), the number of times P is increased by “1” (at step S21), which is n. Only when it continues consecutively (P = n), the subscriber information management unit 3 notifies the identification value memory 21 to increment the identification value by 1 (at step S22).

Upon receiving this notification, the memory 21 increments the identification value of the corresponding subscriber line by one (at step S5).

After that, when the contents of the statistical information notification to this subscriber line are in the state of data passage amount> guaranteed band, the subscriber information management unit 3 resets the number of times P = 0 (S25). As in the embodiment (1), the memory 21 is notified to decrease the identification value by one.

If the data passage amount ≦ guaranteed bandwidth continues for n consecutive times, the subscriber information management unit 3
Notifies the memory 21 to further increase the identification value by one. When the identification value continues to rise and reaches the maximum threshold value stored in advance in the ROM 33 (at step S23), the subscriber information management unit 3 notifies the memory 22 of that fact.

When receiving the notification that the subscriber line has reached the maximum threshold value, the memory 22 increases the guaranteed bandwidth of the subscriber line by a predetermined value αKbps (at step S24).

In this case, a timer for a predetermined fixed time is started, and the guaranteed bandwidth is held until the timer times out (at step S24). When the timer times out, the subscriber information management unit 3 determines that the subscriber information memory 22 of the subscriber line.
Restore the subscriber guaranteed bandwidth within.

In this manner, while the guaranteed bandwidth is increasing, the subscriber line can communicate with a capacity exceeding the previous bandwidth.

Embodiment (5): FIG. 7 This embodiment is different from Embodiment (1) in step S2.
6 to 32 are added.

That is, the subscriber information management section 3 executes the step S2, and then the timer T that times out for a subscriber line whose identification value has dropped for the first time at a predetermined time, and the subscriber line identification. The identification value reduction number counter 34 that counts the number K indicating how much the value has decreased from the initial value is initialized (at step S26).

While the timer T has not timed out in step S27, if the data passage amount> the guaranteed band in step S31, the decrease number K is increased by "1" (step S32).

When the timer T has timed out (Y in S27), and the number K of lowered identification values is β or more (K> β), the subscriber information management section 3 determines that the subscriber line To stop reception (S29 of the same).
Notify to. The memory transfer unit 6 stops the memory transfer,
Reception of the subscriber line is stopped. After this, K is reset (at step S30).

Therefore, even before the identification value drops to the minimum threshold value, the reception can be stopped early depending on the degree of the drop.

Embodiment (6): FIG. 8 This embodiment is different from Embodiment (1) in step S3.
3 to 35 are added.

That is, when the subscriber line is stopped receiving (S11 in the same figure), the subscriber information management unit 3 searches the identification value storage memory 21 of all the subscriber lines, and finds the highest value among the subscriber lines. Select a subscriber line that has an identification value. (However, if the subscriber line with the highest value is less than the initial value of the identification value, it is preferable not to select any subscriber line.)

Next, the subscriber information management unit 3 sets the guaranteed bandwidth (Z) of the subscriber line whose reception has been stopped to the subscriber information memory 2
Band (A + Z) that is read from 2 and the guaranteed band (Z) and the guaranteed band (A) of the subscriber line with the highest identification value are added.
Is overwritten on the guaranteed bandwidth of the subscriber information storage memory 22 of the subscriber line having the highest identification value (at step S33).

Then, the increased guaranteed bandwidth of the subscriber line having the highest identification value among the subscriber lines is retained until the line whose reception is stopped resumes reception (S34 of the same). It is returned to the band (at step S35).

While the guaranteed bandwidth is increasing, the bandwidth of this subscriber line has more margin than before, so even if communication is performed beyond the previous bandwidth, the identification value will not decrease.

Embodiment (7): FIG. 9 In this embodiment, step S3 is added to the embodiment (1).
6 to 39 are added.

That is, when there are a plurality of subscriber lines whose reception is stopped, the subscriber information management section 3 determines the guaranteed bandwidths H of the subscriber lines X, Y and Z whose reception is stopped.
I and J are the guaranteed bandwidth D of the subscriber line A whose identification value is (highest value −1), the guaranteed bandwidth E of the subscriber line B whose identification value is (highest value −2), and the identification value (highest Subscriber line C with value -3)
To the guaranteed bandwidth F of the above (S36, 37 of the same).

As a result, the guaranteed bandwidth is sequentially increased from the subscriber line having the highest identification value to the number of subscriber lines whose reception is stopped. Subscriber lines with increased guaranteed bandwidth
The increased bandwidth is held until the corresponding subscriber line whose reception is stopped resumes reception, and when reception is resumed, the bandwidth is returned to the previous value (S38, 39).

Embodiment (8): FIG. 10 This embodiment is different from Embodiment (1) in step S4.
0-43 is added.

That is, when there are a plurality of subscriber lines having the highest identification value for the subscriber line for which reception is stopped, the subscriber information management section 3 causes the subscriber line X of the reception line for which reception is stopped. A band obtained by dividing the guaranteed band D by the total number of subscriber lines having the highest identification value is distributed to the bands A, B, and C of the subscriber lines having the highest identification value as follows. A = A + D / 3 B = B + D / 3 C = C + D / 3

Then, when the subscriber line whose reception is stopped resumes reception, the band of the subscriber line having the highest identification value is restored (S38, 43).

[0066]

As described above, according to the exchange connection device of the present invention, the statistical information management unit detects the data passing amount per unit time for each subscriber line, and the subscriber information management unit Each time the notification of the data passage amount is received, the guaranteed band for each subscriber line held in the memory unit is compared with the data passage amount, and when the data passage amount exceeds the guaranteed band, the identification value is lowered. Hold it in the memory section, stop reception when the identification value falls to the minimum threshold value, and raise the identification value and hold it in the memory section when the data passage amount falls within the guaranteed band. The subscriber line that has stopped receiving is configured not to restart reception until the identification value becomes higher than the minimum threshold value. Therefore, for the subscriber line that has performed communication exceeding the guaranteed band. Adds identification value without stopping reception immediately Can be a reception stop only if equal to or less than a certain value identification value by Rukoto.

The band of the subscriber line whose reception is stopped can be effectively used by adding it to the band of the subscriber line having the highest identification value.

Further, a grace period is given to a subscriber line which communicates over the band, and when the communication is continued over the band, the communication is considered in consideration of the influence on other subscriber lines. The bandwidth of other subscriber lines can be secured by shutting off the line.

Even if the bandwidth is exceeded, the communication will not be interrupted if communication is performed with normal traffic after that. Therefore, the bandwidth is given to all the subscriber lines, and the communication truly exceeding the bandwidth is performed. It is possible to suspend reception only for existing subscriber lines, which greatly contributes to ensuring the communication quality of the subscriber lines.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the principle of an exchange connection device according to the present invention.

FIG. 2 is a block diagram showing a configuration example of an exchange connection device according to the present invention.

FIG. 3 is a flow chart diagram showing an operation embodiment (1) executed particularly in subscriber information management in the exchange connection device according to the present invention.

FIG. 4 is a flowchart showing an operation embodiment (2) executed particularly in subscriber information management in the exchange connection device according to the present invention.

FIG. 5 is a flow chart diagram showing an operation embodiment (3) executed particularly in subscriber information management in the exchange connection device according to the present invention.

FIG. 6 is a flow chart showing an operation embodiment (4) executed particularly in subscriber information management in the exchange connection device according to the present invention.

FIG. 7 is a flow chart diagram showing an operation example (5) executed particularly in subscriber information management in the exchange connection device according to the present invention.

FIG. 8 is a flowchart showing an operation example (6) executed particularly in subscriber information management in the exchange connection device according to the present invention.

FIG. 9 is a flowchart showing an operation embodiment (7) executed particularly in subscriber information management in the exchange connection device according to the present invention.

FIG. 10 is a flow chart diagram showing an operation embodiment (8) executed particularly in subscriber information management in the exchange connection device according to the present invention.

[Explanation of symbols]

1 Statistical Information Management Department 2 memory section 21 Identification value storage memory 22 Subscriber information memory 3 Subscriber Information Management Department 31 Comparison Department 32 counter 33 ROM 34 timer 501-559 receive buffer 6 Memory transfer unit 7 Transmitter L0 to L59 subscriber line In the drawings, the same reference numerals indicate the same or corresponding parts.

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shin Abe 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nihon Telegraph and Telephone Corporation (56) Reference JP-A-6-334688 (JP, A) Kaihei 3-89744 (JP, A) JP 5-284173 (JP, A) JP 9-1449046 (JP, A) JP 4-168834 (JP, A) JP 9-247208 ( JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04L 12/56

Claims (8)

(57) [Claims] 1. A statistical information management unit for detecting a data passage amount per unit time for each subscriber line in a device which accommodates a plurality of subscriber lines having different line speeds and is connected to a switching system by a high speed line. , A memory unit holding a guaranteed bandwidth and the same identification value for each subscriber line, and a guaranteed bandwidth and a data passage amount for each subscriber line each time the notification of the data passage amount is received from the statistical information management unit. When the data passing amount exceeds the guaranteed bandwidth, the identification value is lowered and held in the memory unit, and when the identification value falls to the minimum threshold value, the reception is stopped, and then the When the amount of data passing falls within the guaranteed band, the identification value is increased and held in the memory unit until the identification value becomes higher than the minimum threshold value for the subscriber line in which the reception is stopped. With the subscriber information management unit that does not restart reception Exchange connection apparatus characterized by comprising a. 2. The exchange connection device according to claim 1, wherein the subscriber information management unit forcibly restarts reception of the subscriber line whose reception has been stopped after a certain period of time. 3. The subscriber information management unit according to claim 1, wherein the subscriber information management unit counts the reception suspension time, and when the reception suspension time exceeds a predetermined time, the guaranteed bandwidth of the subscriber line is a predetermined value. Switch connection device characterized by lowering. 4. The subscriber information management unit according to claim 1, wherein the subscriber unit has an initial value of the guaranteed bandwidth and an identification value for the memory unit, and the identification value has not dropped for a predetermined time from the initial value. Switch connection device characterized by increasing the identification value for a subscriber line and increasing the guaranteed bandwidth by a predetermined value for a certain time when the identification value reaches a predetermined maximum threshold value . 5. The subscriber information management unit according to claim 1, wherein the identification value does not fall to the minimum threshold value when the number of reductions of the identification value within a fixed time exceeds a predetermined value. An exchange connection device characterized in that reception of the subscriber line is stopped. 6. The subscriber information management unit according to claim 1, wherein when the subscriber line is stopped receiving, the identification value among all the subscriber lines is kept until the subscriber line restarts receiving. An exchange connection device characterized by raising the predetermined maximum guaranteed bandwidth by the guaranteed bandwidth of the subscriber line whose reception has been suspended. 7. The subscriber information management unit according to claim 1, wherein when there are a plurality of subscriber lines whose reception is stopped, the subscriber information management unit identifies all the subscriber lines until reception of the subscriber lines resumes. In order from the subscriber with the highest value,
An exchange connection device characterized by increasing the guaranteed bandwidth by the guaranteed bandwidth of the subscriber line whose reception is stopped. 8. The subscriber information management unit according to claim 1, wherein when there are a plurality of subscriber lines having the highest identification value among all subscriber lines, the guarantee of the subscriber line which has been stopped is received. An exchange connection device characterized in that a band is evenly distributed by the maximum number of subscribers.