KR0175568B1 - Emulation control device and method for ABR / ABT transmission capability interworking of asynchronous transfer mode (AMT) public network - Google Patents

Abstract

(ABR) input traffic having different resource management (RM) cell structures and flow control schemes when only asynchronous transfer mode block transfer (ABT) flow control is implemented in an asynchronous transfer mode The present invention relates to an apparatus and method for controlling an emulation of an ABR / ABT transmission capability interworking with an effective bit rate / asynchronous transmission mode block transmission (ABR / ABT) capable of accommodating an effective bit rate forward resource The management cell is passed through without being terminated to be transmitted to the effective bit rate switching system of the destination private network so that the flow control is performed in one closed loop from the source effective bit rate switching system to the destination effective bit rate switching system, In the public network, the effective bit rate (ACR) Asymmetric transmission mode block transmission capacity flow control that requests the block cell ratio (BCR) band between switching systems of asynchronous transmission mode block transmission in the public network is performed internally by extracting the parameter values, thereby realizing a simple effective bit rate / Mode block transmission interoperability can be performed.

Description

Emulation control device and method for ABR / ABT transmission capability interworking of asynchronous transfer mode (ATM) public network

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for receiving an available bit rate (ABR) input traffic when only ATM block transfer (ABT) flow control is implemented in an asynchronous transfer mode To an apparatus and method for controlling an emulation of interworking with an effective bit rate / asynchronous transfer mode block transfer (ABR / ABT) capability.

In ITU-T SG13 Q.8, the deterministic bit rate (DBR), the statistical bit rate (Sbr), the asynchronous transfer mode block transmission (ABT) and the effective bit rate (ABR) (ATM Transfer Capability, ATC).

Unlike the fixed bit rate (CBR) and the variable bit rate (VBR) services, the ATCs are classified in terms of user services, and the transmission characteristics of the asynchronous transmission mode .

However, the Asynchronous Transfer Mode Forum does not accept the Asynchronous Transfer Mode (ABT) transmission capability recommended by the ITU-T and the Unspecified Bit Rate (UBR) of the Asynchronous Transfer Mode Forum Not yet defined in the Recommendation, the two standardization bodies have different standardized asynchronous transfer mode transmission capabilities.

On the other hand, the user considers only the asynchronous transmission mode transmission capability (ATC) provided in the user network interface (UNI) or the user network interface of the private network, but does not consider what asynchronous transmission mode transmission capability is provided in the public network.

The public network may also not provide all of the asynchronous transmission mode transmission capabilities defined in the Recommendation.

Accordingly, the user may request the asynchronous transmission mode transmission capability not implemented in the public network. In this case, the switching system of the public network can not provide the requested asynchronous transmission mode transmission capability but the quality of service (Quality of Service, QOS), or use a routing function from the viewpoint of network management.

Currently, ITU-T SG13 defines the implementation of a deterministic bit rate (DBR) as essential and recommends that all asynchronous transmission mode transmission capabilities be accommodated at a deterministic bit rate.

However, in this case, by allocating the transmission band to the maximum transmission rate (Peak Cell Rate), the band use efficiency for the traffic with a large burst is lowered.

In particular, in the case of the effective bit rate (ABR) traffic, the characteristic of the effective bit rate traffic is maintained in the private network so that the bandwidth can be efficiently used. However, if the public bit rate is allocated to the DBR, It gets worse.

Also, since the statistical bit rate (SBR) requires a sustained cell rate (SCR) and an intrinsic burst tolerance (IBT) as traffic parameters, it is difficult to accept an effective bit rate or an asynchronous transmission mode block transmission.

Therefore, the effective bit rate or the asynchronous transmission mode block transmission must be implemented in the public network in terms of traffic characteristics and bandwidth utilization efficiency.

However, the effective bit rate or the asynchronous transmission mode block transmission is intended to support bursty data transmission and can accommodate the same purpose user requested service.

Therefore, in the public network, only one of the effective bit rate or the asynchronous transmission mode block transmission can be implemented, and the other asynchronous transmission mode transmission capacity can be accommodated by the interoperability mechanism.

In this case, in the public network, asynchronous transmission mode block transmission in which the source switching system can request the transmission rate is more advantageous from the viewpoint of interoperability than the effective bit rate whose transmission rate is limited by the control of the network.

However, the effective bit rate and the asynchronous transfer mode block transfer differ in the structure of the resource management (RM) cell used for each flow control and the flow control method is different.

Therefore, when the subscriber of the private network using the effective bit rate is required to pass through the public network in which only the asynchronous transmission mode block transmission flow control is implemented, the public bit rate is set to the effective bit rate / asynchronous transmission mode block transmission (ABR / ABT) transmission capability interoperability mechanism is needed.

At this time, in the effective bit rate / asynchronous transfer mode block transmission capability interworking mechanism, an effective bit rate resource management (ABR RM) cell must be converted into an asynchronous transfer mode block transfer resource management (ABT RM) cell and a flow control method must be converted.

Also, since the allowed bit rate (ACR), which is the transmission rate of the source according to the control of the network, changes in accordance with the control of the network, the asynchronous transmission mode block transmission flow controller changes the allowed bit rate There is a problem that the block cell rate (BCR) of the asynchronous transmission mode block transmission traffic must be changed.

Asynchronous Transfer Mode Block Transfer (ABT) Effective bit rate (ABR) of a private network in a public network switching system implemented only in flow control. Effective bit rate input from the switching system source. Forward resource management (RM) To be passed to the effective bit rate switching system so that flow control can be performed in one closed loop from the source effective bit rate switching system to the destination effective bit rate switching system.

In the public network, which is an intermediate node, the asynchronous transfer mode block transfer flow control in the public network is performed internally by extracting the allowable cell ratio (ACR) parameter value in the effective bit rate forward resource management room, And to provide an effective bit rate / asynchronous transmission mode block transmission (ABR / ABT) transmission capability interoperability method that only serves as a path for traffic flow control.

FIG. 1 is an overall configuration diagram of an asynchronous transfer mode (ATM) system in which the present invention is mounted; FIG.

FIG. 2 is a block diagram of an emulation control apparatus according to the present invention; FIG.

3 is a flow chart of an emulation control method according to the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

10: Asynchronous transfer mode switching system 11: Subscriber matching apparatus

12: asynchronous transfer mode switch 13: call control device

14: Network matching device 15: Emulation unit

20: Emulation control device 21: Effective bit rate forward resource management detector

22: buffer 23: emulation control unit

According to an aspect of the present invention, there is provided an emulation apparatus mounted in an asynchronous transfer mode (ATM) switching system of a public network, the apparatus comprising: an effective bit rate forward resource management cell among cells input from an external effective bit rate (ABR) An effective bit rate forward resource management cell detection unit for detecting a forward resource control cell; A buffer for receiving cells from the detector and outputting the received cells to another asynchronous transfer mode block transfer switching system; (BCR) bandwidth requesting resource management cell to the asynchronous transfer mode block transfer switching system by receiving the allowed cell ratio (ACR) parameter in the effective bit rate forward resource management cell from the effective bit rate forward resource management cell detection unit, Asynchronous Transfer Mode Block Transmission Checking the Block Cell Ratio Bandwidth from the Switching System Upon receipt of the resource management cell, it notifies the block cell rate transmission rate to the buffer means in order to control the buffer transmission rate, and the effective bit rate from the external asynchronous transmission mode block transmission switching system And an emulation control unit for receiving the resource management cell and transmitting the resource management cell to the corresponding source effective bit rate switching system.

The method of the present invention for achieving the above object is also a method for effective bit rate / asynchronous transfer mode block transmission (ABR / ABT) transmission capability interworking applied to an emulation apparatus mounted in an asynchronous transfer mode switching system, Effective bit rate When the forward resource management cell receives the effective bit rate forwarding resource management cell from the switching system, the effective bit rate forward resource management unit extracts the allowable cell ratio (ACR) parameter in the room, and the external relative asynchronous transmission mode block transmission. A second step of receiving the management cell and controlling to transmit the block cell rate bandwidth control resource management cell again and to transmit the data cells in the buffer at the block cell rate transmission rate; And a third step of receiving the effective bit rate reverse resource management cell from the external asynchronous transfer mode block transfer switching system and transmitting the received effective bit rate reverse resource management cell to the corresponding source effective bit rate switching system.

The present invention relates to emulation control for effective bit rate / asynchronous transmission mode block transmission capability interworking in an asynchronous transmission mode public network, and the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an overall configuration diagram of an asynchronous transfer mode system in which the present invention is mounted.

First, only asynchronous transfer mode block transfer (ABT) damping control is implemented in the asynchronous transfer mode system of the public network, so that the emulation unit is mounted on the subscriber unit for effective bit rate / asynchronous transfer mode block transfer (ABR / ABT) The effective bit rate input traffic is converted into the asynchronous transmission mode block transmission traffic of the public network, and is transmitted to the counterpart node according to the asynchronous transmission mode block transmission flow control.

FIG. 2 is a block diagram of an emulation control apparatus according to an embodiment of the present invention. In FIG. 2, an effective bit rate forward resource management cell is detected from among cells input from an external effective bit rate switching system, and an allowable cell ratio (ACR) To an emulation control unit (23), and an effective bit rate forward resource management cell detection unit (21) for receiving cells from the effective bit rate forward resource management cell detection unit (21) and outputting the cells to another asynchronous transfer mode block transmission (ABT) switching system Cell ratio bandwidth requesting resource management cell to the asynchronous transfer mode block transfer switching system by receiving the allowable cell rate parameter in the effective bit rate forward resource management cell from the buffer 22 and the effective bit rate forward resource management cell detection unit 21, External Asynchronous Transfer Mode Block Transmission From the switching system, Upon receipt of the rate control resource management cell, the transmission rate of the buffer 22 is controlled to a block cell ratio, and when the effective bit rate reverse resource management cell is received from the external asynchronous transfer mode block transfer switching system, it is transmitted to the corresponding source effective bit rate switching system And an emulation control unit 23.

FIG. 3 is a flowchart of an emulation control method according to the present invention. When an effective bit rate forward resource management cell is received from an external effective bit rate switching system, the allowed cell rate parameter is extracted 302 within an effective bit rate forward resource management cell, The external asynchronous transfer mode block transfer switching system transfers the block cell rate bandwidth request resource management cell according to the allowable cell ratio value (303) and terminates.

On the other hand, when receiving the block cell ratio bandwidth check resource management cell from the external asynchronous transfer mode block transmission switching system, the block cell ratio bandwidth check resource management cell is transmitted again (305) (306). ≪ / RTI >

In addition, when the effective bit rate reverse resource management cell is received from the external asynchronous transfer mode block transfer switching system (307), it is transmitted to the corresponding source effective bit rate switching system (308).

According to the present invention configured to operate as described above, when only asynchronous transmission mode block transmission (ABT) flow control is implemented in the public network, emulation control is performed to accommodate effective bit rate input traffic, and the effective bit rate forward resource management cell (ACR) parameter is extracted from the forward resource management cell of the effective bit rate, and the asynchronous transmission mode block transmission traffic flow control according to the allowable cell ratio value is performed internally in the public network, so that the function implementation is simple effective bit rate / asynchronous Transmission mode block transmission (ABR / ABT) transmission capability interoperability can be performed.

Claims (2)

1. An emulation control apparatus mounted in an asynchronous transfer mode (ATM) switching system, the apparatus comprising: an effective bit rate resource management cell detector for detecting an effective bit rate forward resource management (RM) cell among cells input from an external effective bit rate (ABR) ; A buffer for receiving cells from the cell detector and outputting the cells to another asynchronous transfer mode block transfer (ABT) switching system; (BCR) bandwidth request resource management cell to an asynchronous transfer mode block transfer switching system by receiving an allowable cell ratio (ACR) parameter in an effective bit rate forward resource management cell from the effective bit rate forward resource management cell detector, When receiving a block cell ratio bandwidth check resource management cell from a transmission mode block transfer switching system, the control unit controls the transmission rate of the buffer to a block cell ratio, receives an effective bit rate reverse resource management cell from an external asynchronous transfer mode block transmission switching system, And an emulation controller for transmitting the data to an effective bit rate switching system. The emulation controller for interworking ABR / ABT transmission capability of an ATM public network. 1. An emulation control method for interworking an effective bit rate / asynchronous transfer mode block transmission capability applied to an emulation unit device mounted in an asynchronous transfer mode (ATM) switching system, the method comprising: (BCR) bandwidth as an external relative asynchronous transfer mode block transfer (ABT) switching system by extracting an allowable cell ratio (ACR) parameter within a forward resource management cell when a resource management (RM) cell is received. And terminating the process; And a control unit for receiving the block cell rate bandwidth control resource management cell from the external asynchronous transfer mode block transmission switching system and for transmitting the block cell rate bandwidth control resource management cell again and transmitting the data cells in the buffer at the block cell rate transmission rate Step 2; And a third step of receiving the effective bit rate reverse resource management cell from the external asynchronous transfer mode block transmission switching system and transmitting the effective bit rate reverse resource management cell to the corresponding source effective bit rate switching system. ABR transmission capability interworking of an asynchronous transfer mode (ATM) public network.