JPH066381A - Variable setting system for communication line band - Google Patents

Abstract

PURPOSE:To secure a communication and flexibly cope with variation in communication quantity even if the communication quantity varies by selectively changing bands to be used out of combinations of plural kind of bands which are already registered in an up and down course band distribution registering means. CONSTITUTION:Plural kind of combinations of bands to be distributed to the up and down courses of a communication path 300 are previously registered in the up and down course band distribution registering means 101. Here, the total of bands which are allowed for the up and down courses is made constant. An exchange 100 is provided with an up and down course band distribution changing means 102 and the combination of bands to be used are selected and changed among the combinations of bands which are already registered in the registering means 101. At this time, the combination of bands in use is selected corresponding to the communication quantity, time zone, or a request from a terminal device 200. Then even if the up or down course varies in communication quantity, the communication of each course is secured and the variation can flexibly be coped with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable communication channel band setting system in an exchange used in a data communication network such as a packet network or a frame relay network.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing an example of a conventional packet switch. In FIG. 5, the packet switch 1 includes
A plurality of packet terminals 2 are connected by a communication line 3, and each packet terminal 2 sets a plurality of logical channels 4 on the communication line 3 and transmits / receives packet format data via each logical channel 4. To do.

In FIG. 5, only one packet terminal 2 is shown. The packet terminal 2 uses the communication speed used for the upstream route for transferring a packet from the packet terminal 2 to the packet switch 1 when starting communication via an arbitrary logical channel 4 _i , and the packet switch 1 to the packet terminal 1. 2 and the communication speed used for the downstream route for transferring the packet are determined [hereinafter referred to as band (S)].

The packet switch 1 has a required number of buffers 14 _i for temporarily storing packets transferred via, for example, an up route and a down route, as resources required for packet transfer by the logical channel 4 _i. Hereinafter, referred to as the number of buffers (N)], the resource registration management unit 1 secured in the storage unit 12 and corresponding to the logical channel 4 _i in the processing unit 11
The band (S) and the number of buffers (N) are registered in 3 _i .

The N sets of buffers 14 _i are shared for storing packets transferred via the ascending and descending routes of the logical channel 4 _i , so that the ascending packets are transmitted at certain times. When a large amount of packets are transferred via the route and a large number of packets are transferred via the downstream route in other time zones, the buffer 14 _i is efficiently used, but When a large number of packets are transferred at the same time via the route and the down route, the buffer 14 _i becomes insufficient, and for example, by transmitting the suppression packet (RNR) from the packet switch 1 to the packet terminal 2. The packet transmission from the packet terminal 2 has to be restricted, or the communication in the determined band (S) has to be temporarily terminated, the higher speed band (S) has to be determined again, and the communication has to be restarted.

[0006]

As is apparent from the above description, in the conventional packet switch, when the communication is started via the logical channel 4 _i , the total bandwidth of the up route and the down route is Since (S) has been decided, if the time zone in which a large number of packets are transferred via the up route and the time zone in which a large number of packets are transferred via the up route are different, , Efficient communication is expected, but when both time zones match, two-way communication presses each other and regulates communication in each direction, or communication is temporarily stopped and the allowable communication volume is increased. After increasing the number, communication had to be restarted.

However, via the up and down routes,
In order to transfer a large number of packets smoothly at the same time, there is no solution other than securing sufficient bandwidth for each of the upstream and downstream routes, but the total bandwidth of the upstream and downstream routes is constant. Assuming that, as the second best measure, even if the communication in one direction increases, it is important to secure the communication in the other direction to some extent.

It is an object of the present invention to ensure communication on each route even if the amount of traffic on the upstream and downstream routes fluctuates, and to be able to flexibly deal with variations in the amount of communication. .

[0009]

FIG. 1 is a diagram showing the principle of the present invention. In FIG. 1, reference numeral 100 denotes an exchange which is a target of the present invention, 200 denotes a terminal device accommodated in the exchange 100, and 300 denotes a communication path set between the exchange 100 and the terminal device 200.

Reference numeral 101 is an upper / lower path band distribution registration means provided in the exchange 100 according to the present invention. 102 is
It is an upper / lower path band distribution changing means provided in the exchange 100 according to the present invention.

[0011]

The upper / lower path band distribution registration means 101 is used for the communication path 3
The total number of bands allowed for the up route and the down route of 00 is fixed, and a plurality of combinations of bands allocated to the up route and the down route are registered in advance.

The upper / lower path band allocation changing means 102 selects and changes the active band combination from a combination of a plurality of types of bands registered in the upper / lower path band allocation registering means 101.

The upper / lower path band allocation changing means 102 is
It is considered that the amount of data transmitted via the up route and the down route is monitored and the combination of the currently used bands is changed to the combination of the bands that enables the data amount to be smoothly transmitted.

The upper / lower road band distribution registration means 101 is
It is considered that the combination of each band is registered in correspondence with each time zone, and the upper / lower path band allocation changing means 102 changes the combination of the active band in correspondence with the time zone.

Further, the upper / lower path band allocation changing means 102 is
It is considered to change the combination of active bands in response to the change request from the terminal device 200. Further, it is considered that the upper / lower path band allocation changing unit 102 notifies the terminal device 200 of the changed contents when the combination of the currently used bands is changed.

The exchange 100 is assumed to be an exchange that transmits / receives packet format data or an exchange that transmits / receives frame relay format data. Therefore, the communication via the up route and the communication via the down route are guaranteed independently of each other, and fluctuations in the communication amount via the up route and the communication amount via the down route can be prevented. It will be possible to respond flexibly and the reliability of the exchange will be greatly improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing a packet switch according to an embodiment of the present invention (claim 2), FIG. 3 is a diagram showing a packet switch according to an embodiment of the present invention (claim 3), and FIG. It is a figure which shows the packet switch by one Example of invention (Claim 4). The same reference numerals denote the same objects throughout the drawings.

2 to 4, a packet switch 1 is shown as the switch 100 in FIG. 1, and FIG.
The packet terminal 2 is shown as the terminal device 200 in FIG. 1, and the logical channel 4 _i is shown as the communication path 300 in FIG.

In FIGS. 2 to 4, the sum of the upstream and downstream bandwidths of the logical channel 4 _i [hereinafter referred to as upstream bandwidth (S _U ) and downstream bandwidth (S _D )], that is, It is assumed that the band (S) is set to be constant, and the storage unit 12 stores the resource corresponding to the band (S).
The total number of buffers 14 _i secured therein [the number of buffers (N)] is also constant.

First, an embodiment of the present invention (claim 2) will be described with reference to FIG. 2, a band management table registration unit 15 _Ai is provided as the upper / lower road band distribution registration unit 101, and a resource management unit 16 _Ai is provided as the upper / lower road band distribution change unit 102 in FIG. There is.

In FIG. 2, the packet terminal 2 is connected to another party via the arbitrary logical channel 4 _i and is connected to another party (VC).
When setting up a call with, or fixed connection type (PVC)
When setting a communication path in, a band allocation type (P ₀ ) in which a constant value band (S) is allocated to three different allocation types, that is, an upstream usage band (S _U0 ) and a downstream usage band (S _D0 ).
And the upstream bandwidth (S _U1 ) and downstream bandwidth (S _D1 )
Bandwidth allocation type (P ₁ ) allocated to the
_U2) and bandwidth allocation type was allocated to the downlink bandwidth used (S _D2) and (P ₂₎ is provided, to declare the packet switch 1.

The bandwidth management table registration unit 1 provided in the processing unit 11 in the packet switch 1 in correspondence with the logical channel 4 _i.
5 _Ai registers the three types of band allocation types (P ₀ ) to (P ₂ ) declared by the packet terminal 2.

Further, the resource management unit 16 _Ai provided in the processing unit 11 corresponding to the logical channel 4 _i has three types of bandwidth allocation types (P ₀ ) to P ₀ registered in the bandwidth management table registration unit 15 _Ai. The bandwidth allocation type [eg (P ₀ )] currently used is determined from (P ₂ ) and the logical channel 4
_The (N) sets of buffers 14 _i reserved in the storage unit 12 corresponding to _i are _{assigned the} number of upstream buffers (N _U0 ) corresponding to the upstream use band (S _U0 ) and the downstream use band (S _D0 ). And the number of downstream buffers (N _D0 ), and further, an upstream threshold (S _TU0 ), which serves as a reference for determining whether the upstream bandwidth (S _U0 ) or the downstream bandwidth (S _D0 ) is insufficient. A downlink threshold (S _TD0 ) [for example, set to 80% of the uplink used band (S _U0 ) and the downlink used band (S _D0 )] is calculated.

The resource management unit 16 _Ai uses the band allocation type (P ₀ ) [= uplink use band (S _U0 ) and downlink use band (S _D0 )], the up threshold (S _TU0 ) and the down threshold (S
_TD0 ), the number of buffers (N), the number of upstream buffers (N _U0 ) and the number of downstream buffers (N _D0 )
_{In addition} to managing the transfer of packets through the upstream and downstream routes of _i , the number of packets transferred through the upstream and downstream routes of logical channel 4 _i is monitored, and When it is detected that the number of packets transferred via the number exceeds the upstream threshold (S _TU0 ), another bandwidth allocation type (P ₁ ) registered in the bandwidth management table registration unit 15 _Ai is detected.
Alternatively, from (P ₂ ), the bandwidth allocation type [eg (P (P)) to which a larger upstream bandwidth [eg (S _U1 )] is allocated
₁ )] is selected and the setting is changed to the band allocation type (P ₀ ) currently set, and accordingly, the buffer 14 in the storage unit 12 is changed.
_i is the number of upstream buffers (N _U1 ) and the number of downstream buffers (N _U1 )
_D1 ), and the upstream threshold (S _TU0 ) and the downstream threshold (S _TD0 ) already set in the resource management unit 16 _Ai are changed to the upstream threshold (S _TU1 ) and the downstream threshold (S _TD1 ).
Further, the number of upstream buffers set in the resource management unit 16 _Ai (N
_U0 ) and the number of downstream buffers (N _D0 ) are changed to the number of upstream buffers (N _U1 ) and the number of downstream buffers (N _D1 ).

During the above setting change, the packet transfer via the logical channel 4 _i of the packet terminal 2 is not interrupted. As is apparent from the above description, according to the embodiment of the present invention (claim 2), when the packet terminal 2 starts packet communication via the logical channel 4 _i , a plurality of types of band allocation types (P ₀ ) to (P ₂ ) are registered in the bandwidth management table registration unit 15 _Ai , and the resource management unit 16 _Ai performs packet transfer via the upstream route and the downstream route based on the registered bandwidth allocation type (P ₀ ). monitoring, when the number of transfer packets exceeds an uplink threshold (S _TU0) or downlink threshold (S _TD0), without interrupting the communication via a logical channel 4 _i, other bands allocation type (P ₁ ) Or (P ₂ )
By changing to ( ₁ ), the bandwidth allocation types (P ₀ ) to (P ₂ ) that match the current state of packet transfer via the upstream and downstream routes will be used.

It is to be noted that FIG. 2 shows an embodiment of the present invention until the end.
Of course, for example, the bandwidth allocation type (P) is requested by the packet terminal 2.
The bandwidth management table registration unit is not limited to what is notified.
15 _AiIs considered to be set autonomously, but it takes
In this case, the effect of the present invention does not change. Resource management department 1
6_AiChange the setting of bandwidth allocation type (P),
Although it is considered to notify the packet terminal 2 of the content,
Even in such a case, the effect of the present invention does not change. Bandwidth management
Table registration unit 15_AiThere are three types of bandwidth allocation types (P) registered in
It is not limited to any kind, and many other variations are considered.
However, the effect of the present invention does not change in any case.

Next, one embodiment of the present invention (claim 3) will be described.
This will be described with reference to FIG. In FIG. 3, a band management table registration unit 15 _Bi is provided as the upper / lower road band distribution registration unit 101, and a resource management unit 16 _Bi is provided as the upper / lower road band distribution change unit 102 in FIG. There is.

In FIG. 3, the packet terminal 2 connects via a logical channel 4 _i and selects a connection type (VC).
When setting up a call with, or fixed connection type (PVC)
When setting a communication path in, when allocating a constant value band (S) to the upstream use band (S _U ) and the downstream use band (S _D ), different allocations depending on the time zone (T), that is, Weekday 9
From 17:00 to 17:00 [hereinafter referred to as time zone (T _A )], the upstream use band (S _UA ) and the downstream use band (S _DA ) and other (for example, from 17:00 on weekdays to 9 on the next day)
When, and time zone holiday) [hereinafter hours (T _B) and referred] an uplink use band allocated in correspondence with the (S _UB) and downstream usable band (S _DB) provided to return the packet switch 1 .

A bandwidth management table registration unit 1 provided in correspondence with the logical channel 4 _i in the processing unit 11 in the packet switch 1.
5 _Bi is the time zone (T _A ) declared by the packet terminal 2.
Corresponding uplink band used (S _UA) and downstream usable band (S _DA), and registers an uplink bandwidth used (S _UB) and downstream usable band (S _DB) corresponding to the time zone (T _B) to.

The resource management unit 16 _Bi provided in the processing unit 11 corresponding to the logical channel 4 _i corresponds to the two kinds of time zones (T _A ) registered in the bandwidth management table registration unit 15 _Bi. from the uplink band used (S _UA) and downstream usable band (S _DA), upstream use band corresponding to the time zone (T _B) (S _UB) and downstream used bandwidth and (S _DB) which, current time interval The upstream use band (S _UA ) and the downlink use band (S _DA ) corresponding to [for example (T _A )] are selected, and the (N) sets secured in the storage unit 12 corresponding to the logical channel 4 _i are selected. The buffer 14 _i is _divided into the number of upstream buffers (N _UA ) and the number of downstream buffers (N _DA ) corresponding to the upstream use band (S _UA ) and the downstream use band (S _DA ).

The resource management unit 16 _Bi uses the selected time zone (T
_A ), corresponding upstream bandwidth (S _UA ) and downstream bandwidth (S _DA ), number of buffers (N), number of upstream buffers (N _UA ) and number of downstream buffers (N _DA ) of the logical channel 4 _i In addition to managing the transfer of packets through the up route and the down route, monitoring the passage of time, for example, after 17:00 on weekdays, the bandwidth management table registration unit 15
New current time zone registered in the _Bi extracts (T _B) in the corresponding uplink band used (S _UB) and downstream usable band (S _DB), the time zone of the current setting in (T _A), the uplink uses Band (S
_UA ) and downlink used band (S _DA ), and accordingly change the buffer 14 _i in the storage unit 12 into the number of upstream buffers (N _UB ) and the number of downstream buffers (N _DB ),
Further, the number of upstream buffers set in the resource management unit 16 _Bi (N
_UA ) and the number of downstream buffers (N _DA ) are changed to the number of upstream buffers (N _UB ) and the number of downstream buffers (N _DB ).

During the above setting change, the packet transfer via the logical channel 4 _i of the packet terminal 2 is not interrupted. As is apparent from the above description, according to the embodiment of the present invention (claim 3), when the packet terminal 2 starts the packet communication via the logical channel 4 _i , it corresponds to the time zone (T _A ). The bandwidth management table registration unit 15 _{Bi stores} the upstream bandwidth (S _UA ) and the downstream bandwidth (S _DA ), and the upstream bandwidth (S _UB ) and the downstream bandwidth (S _DB ) corresponding to the time zone (T _B ). registered, resource management unit 16 _Bi is applicable time zone the present time (T _a) or (T _B) corresponding uplink band used in the (S _UA) and downstream usable band (S _DA) or upstream bandwidth in use in the (S _UB ) And downlink bandwidth (S _DB ).
When the packet transfer via the up route and the down route is assumed to change depending on the time zone, it is possible to perform management that matches each time zone by changing to.

It is to be noted that FIG. 3 is merely an embodiment of the present invention, and when the resource management unit 16 _Bi changes the setting of the time zone (T), it is considered that the packet terminal 2 is notified of the changed contents. However, even in such a case, the effect of the present invention does not change. Further, the time zone (T) registered in the bandwidth management table registration unit 15 _Bi is not limited to two types, and various modifications are considered, but in any case, the effect of the present invention is different. Absent.

Next, one embodiment of the present invention (claim 4) will be described.
This will be described with reference to FIG. 4, a band management table registration unit 15 _Ci is provided as the upper / lower road band distribution registration unit 101, and a resource management unit 16 _Ci is provided as the upper / lower road band distribution change unit 102 in FIG. There is.

[0035] In FIG 4, the packet terminal 2, via any of the logical channels 4 _i permanent virtual circuit format (PV
When setting the communication path in C), the band allocation type (Q) in which the constant value band (S) is allocated to three different allocation types, that is, the upstream use band (S _U0 ) and the downstream use band (S _D0 ). ₀ ), the band allocation type (Q ₁ ) allocated to the upstream band (S _U1 ) and the downstream band (S _D1 ), and the band allocated to the upstream band (S _U2 ) and the downstream band (S _D2 ). The distribution type (Q ₂ ) is provided, and the packet switch 1 is notified.

A bandwidth management table registration unit 1 provided in correspondence with the logical channel 4 _i in the processing unit 11 in the packet switch 1.
5 _Ci registers three types of band allocation types (Q ₀ ) to (Q ₂ ) declared by the packet terminal 2.

Further, the resource management unit 16 _Ci provided in the processing unit 11 corresponding to the logical channel 4 _i has three types of band allocation types (Q ₀ ) to Q ₀ registered in the band management table registration unit 15 _Ci. A band allocation type [eg (Q ₀ )] defined as an initial value is extracted from (Q ₂ ), and (N) sets are secured in the storage unit 12 in correspondence with the logical channel 4 _i. The buffer 14 _i is _divided into the number of upstream buffers (N _U0 ) and the number of downstream buffers (N _D0 ) corresponding to the upstream use band (S _U0 ) and the downstream use band (S _D0 ).

The resource management unit 16 _Ci determines the determined band allocation type (Q ₀ ) [= upstream used band (S _U0 ) and downlink used band (S _D0 )], the number of buffers (N), and the number of upstream buffers (N).
_U0 ) and the number of downstream buffers (N _D0 ) are used to manage the transfer of packets via the upstream and downstream routes of logical channel 4 _i .

On the other hand, when the packet terminal 2 communicating through the logical channel 4 _i desires to change to another band allocation type [eg (Q ₁ )] from the packet transmission / reception status, the band allocation is performed. The "bandwidth change request packet" for requesting the change of the type (Q ₀ ) to (Q ₁ ) is transferred to the packet switch 1 via the logical channel 4 _i .

In the packet switch 1, the processing unit 11
When the resource management unit 16 _Ci therein receives the "bandwidth change request packet" transferred from the packet terminal 2 via the logical channel 4 _i , the bandwidth requested by the packet terminal 2 from the bandwidth management table registration unit 15 _Ci. allocation type (Q ₁₎ to extract, and setting change with the bandwidth allocation type currently set in (Q _0),
Accordingly, the buffer 14 _i in the storage unit 12 is _divided into the number of upstream buffers (N _U1 ) and the number of downstream buffers (N _D1 ), and the number of upstream buffers (N _U0 ) currently set in the resource management unit 16 _Ci . And the number of downstream buffers (N _D0 ) is changed to the number of upstream buffers (N _U1 ) and the number of downstream buffers (N _D1 ).

During the above setting change, the packet transfer via the logical channel 4 _i of the packet terminal 2 is not interrupted. As is clear from the above description, according to the embodiment of the present invention (Claim 3), when the packet terminal 2 starts the packet communication by the permanent virtual connection format (PVC) via the logical channel 4 _i , A plurality of types of band allocation types (Q ₀ ) to (Q ₂ ) are registered in the band management table registration unit 15 _Ci , and the resource management unit 16 _Ci uses the registered band allocation types (Q ₀ ) based on the registered band allocation types (Q ₀ ). The packet terminal 2 manages the packet transfer via the route, and the packet terminal 2 uses the "bandwidth change request packet" at any time without interrupting the communication via the logical channel 4 _i without changing the bandwidth allocation type (Q ₁ ) or (Q By changing to ₂ ), the bandwidth allocation types (Q ₀ ) to (Q ₂ ) that match the current state of packet transfer via the upstream and downstream routes will be used.

It is to be noted that FIG. 4 shows an embodiment of the present invention until the end.
For example, the bandwidth management table registration unit 15 _CiBands registered in
Allocation type (Q) is not limited to three types,
Many variations are considered, but in any case, the effect of the present invention is
The result is unchanged.

Further, FIGS. 2 to 4 are merely embodiments of the present invention, and the resources prepared by the packet switch 1 are not limited to the buffer 14, for example, the window size and the like. However, the effect of the present invention does not change in any case. Further, the exchange 100 to which the present invention is applied is not limited to the packet switch 1, and various modifications such as a frame relay exchange may be considered, but the effect of the present invention does not change in any case.

[0044]

As described above, according to the present invention, in the exchange, the communication via the up route and the communication via the down route are independently guaranteed, and the communication via the up route is performed. It is possible to flexibly cope with fluctuations in traffic volume and traffic volume passing through the down route, and the reliability of the exchange is significantly improved.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention.

FIG. 2 is a diagram showing a packet switch according to an embodiment of the present invention (claim 2).

FIG. 3 is a diagram showing a packet switch according to an embodiment of the present invention (claim 3).

FIG. 4 is a diagram showing a packet switch according to an embodiment of the present invention (claim 4).

FIG. 5 is a diagram showing an example of a conventional packet switch.

[Explanation of symbols]

1 Packet Switch 2 Packet Terminal 3 Communication Line 4 Logical Channel 11 Processing Unit 12 Storage Unit 13 Resource Registration Management Unit 14 Buffer 15 _A , 15 _B , 15 _C Band Management Table Registration Unit 16 _A , 16 _B , 16 _C Resource Management Unit 100 Switching device 101 Upper / lower road band distribution registering means 102 Upper / lower road band distribution changing means 200 Terminal device 300 Communication path

Claims (7)

[Claims] 1. An exchange (100) for transmitting and receiving data via an up route and a down route provided in a communication path (300) set between a terminal device (200) and said communication path (300), (300) The total of the bands allowed for the up and down routes is fixed, and a plurality of types of combinations of bands to be allocated to the up and down routes are registered in advance, and the up and down band bands are allocated. Registration means (101) and the upper / lower path The upper / lower path for selecting and changing the combination of the currently used bands from the combination of the plurality of types of bands registered in the band allocation registration means (101). A communication path band variable setting method, characterized in that a band allocation changing means (102) is provided. 2. The upper / lower path band allocation changing means (10)
2) monitors the amount of data transmitted via the ascending route and the descending route, and selects the combination of the currently used bands to the combination of the bands that enables the data amount to be transmitted smoothly. The communication path band variable setting method according to claim 1, wherein the setting is changed. 3. The upper and lower path band allocation registration means (10)
1) registers the combination of each of the bands in association with each time zone, and the upper / lower path band allocation changing means (10).
2. The communication path variable setting method according to claim 1, wherein in 2), a combination of the currently used bands is changed in correspondence with the time zone. 4. The upper and lower band allocation changing means (10)
The communication path band variable setting method according to claim 1, wherein (2) changes a combination of the currently used bands in response to a change request from the terminal device (200). 5. The upper / lower road band allocation changing means (10)
The communication path variable setting method according to claim 1, wherein (2) notifies the terminal device (200) of the changed contents when the combination of the currently used bands is changed. 6. The variable channel bandwidth setting method according to claim 1, wherein the exchange (100) transmits and receives packet format data. 7. The exchange (100) sends and receives data in a frame relay format.
Variable communication band setting method described.