KR950012323B1 - Header data control unit of isdn - Google Patents

Abstract

The apparatus and method for controlling header data adopts binary coefficient usage parameter control algorithm. The method comprise the steps of; (A)discriminating violation of a cell by checking VCI, loss bits, and control coefficient for the VCI; (B)tagging the cell for 0 cell loss and disusing the cell for 1 cell loss; and (C)sending processing result of the cell to a communition module and terminating the cell processing by resetting a counter.

Description

Header Data Control Device in Broadband Integrated Telecommunication Network

1 is a flowchart of a control method according to the present invention.

2 is a block diagram of a control device according to the present invention.

* Explanation of symbols for main parts of the drawings

24: control information extraction unit 25: control behavior determination unit

26: header data extraction unit 27: drive signal generation unit

28: data cell monitoring unit

The present invention relates to a header data control industry and apparatus for performing a user parameter control (UPC) function among ATM cell control modules of the STM-1 class of broadband broadband terminator. Particularly, a binary coefficient user parameter control algorithm. The present invention relates to a header data control method and apparatus.

The header data controller is an essential function to provide the quality of service (Qos) promised upon accepting the connection of a virtual channel. During the data transmission, the header data controller is provided with a negotiation parameter (Negotiated Parameter). It has a feature that allows to continue providing.

The ATM traffic control algorithms that are currently proposed, except that they must be accurate cell control methods, are problematic for the complex configuration of a considerable volume of hardware in terms of monitoring the amount of traffic. Most user parameter control algorithms require some buffer for the cell being transmitted and have the concept of leaking control information from waiting data cells in this buffer.

Therefore, the necessity of a considerable amount of buffers for the storage of data cells and the traffic processing delay time due to the processing of the stored data cells are a major impediment to the performance of the entire functional block.

Therefore, the present invention devised to solve the problems of the prior art, by efficiently monitoring the user traffic by monitoring the user traffic by using the maximum cell rate as the basic information within one cell time to perform efficient cell control It is an object of the present invention to provide a method and apparatus for controlling header data.

In order to achieve the above object, the control method according to the present invention receives a data cell header from a common ATM access module to obtain a virtual channel value (VCI) and a loss bit, and a control coefficient value and a cell loss bit value for the corresponding virtual channel. Extracting, determining whether the cell is in violation, and after performing the first step, determining cell tagging when the cell violation occurs and the cell loss value is 0, and discarding the cell when the cell loss value is 1. After performing the second step and performing the second step, the control result signal according to the non-violation and the violation is transmitted to the mutual communication module so as to be input to the ATM header configuration, and the counter is reset to monitor the cell in one cell cycle. And a third step of terminating control.

In addition, the control device according to the present invention receives the cell header coming immediately after the cell clock, extracts the most channel value (VCI) and the cell loss value (CLP), and outputs the extracted virtual channel value to the external ATM. Header data extracting means for sending to the connection control unit to output control information from the ATM connection control unit; receiving control information from the external ATM connection control unit; a coefficient designation value corresponding to the control coefficient value and the virtual channel value of the current cell; A control information extraction means for extracting and outputting a match flag value for determining the validity of a cell; and determining whether a negotiation parameter of the current data cell is violated by receiving a control coefficient value and a monitoring coefficient value from the control information extraction means and the header data extraction means; Control action determining means for controlling communication with the intercommunication module in accordance with a control signal from an external ATM state controller; It is driven by a drive signal generating means for outputting a driving clock using a cell clock and a byte clock input from a general ATM connection module, and a cell clock input from the external common ATM connection module, and designated by an external ATM state controller. And data cell monitoring means for extracting the coefficient value of the virtual channel according to the coefficient designation value and outputting the coefficient value to the control action determining means.

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

1 is a flowchart of a binary coefficient cell control algorithm according to the present invention, which extracts the virtual channel and cell loss value of the header reception 11 of 5 bytes in 10, the control coefficient value reception monitoring control value reception of 12, Negotiation violation in (13), check cell loss value in (14), change cell loss value in (15) to = 1, reset the counter of the module in (16), transmit cell control signal to the intercommunication module in (17), (18) a waste disposal decision, and the cell tagging decision step of (19).

A 5-byte data cell header is received from the common ATM access module (ATM layer), and the virtual channel value VCI and cell loss bits CLP are extracted from the received cell header (11).

The control coefficient value, the monitoring coefficient value and the cell loss bit value for the virtual channel are extracted (12), and the cell violation value is determined (13, 14). The cell loss value is in violation of the counter value. If (CLP) = 0, the cell tagging value is changed to cell loss value = 1 (15, 19). If the cell loss value is 1, the cell discard decision is made (18). (17) To be input to ATM header configuration.

Then, by resetting the counter, cell monitoring and control are performed in one cell cycle. In this case, the cell violation cell is characterized by monitoring up to 16 Kbps user traffic using a 14-bit binary counter.

2 is a configuration and connection diagram of a header data control device according to the present invention, 24 is a header data disassembly unit (HDDU), and 25 is a control data disassembly unit (CDDU). ), 26 are Control Action Determination Units (CADU), 27 are Driving Signal Generation Units (DSGU), and 28 are Data Cell Monitoring Units (DCMU). Respectively.

As a functional module to which the present invention is connected, 20 denotes an AMT connection controller, 21 an ATM state controller, 22 a common ATM connection module, and 29 an intercommunication module, respectively.

The header data extracting unit 26 receives the 5-byte cell header synchronized with the byte clock coming in immediately after the cell clock generated every 2.726 ms and extracts the virtual channel value (VCI) and the cell loss value (CLP). Deliver it to other units by function. In addition, the header data extraction unit 26 finds the control coefficient values recorded by referring to the extracted 16-bit virtual channel value by referring to a look-up table of the corresponding virtual channel value of the AMT connection controller 20 and controls information. 17 bits of control information are sent to the extraction unit 24. The control information extraction unit 24 uses the 17-bit control information to determine a coefficient value (Mo_id) corresponding to the control coefficient value and the virtual channel value of the current cell. ), And a match flag value of a cell validity determination is extracted and transmitted to the control behavior determining unit 26 and the data cell monitoring unit 28 for each function.

The control behavior determination unit 25 receives the Cc (Controlled Counter value) and Cm (Monitored Counter value) values from the control information extraction unit 24 and the data cell monitoring unit 28 to determine whether the current data cell is in violation of the negotiation parameter. And a function unit for transmitting the control signal to the intercommunication module or stopping the function execution according to the control signal of the ATM state controller 21.

The drive signal generation unit 27 uses the cell clock and byte clock coming from the common ATM connection module 22 to drive each functional unit in the header data control device, and thus the timing of the header data control device of the present invention and the other function clocks. Considering the relationship, six driving clocks are generated at an appropriate time within one cell time.

The data cell monitoring unit 28 is driven by the cell clock coming up from the common ATM access module 22, and extracts the coefficient value of the corresponding virtual channel according to the coefficient designation value specified by the ATM state control unit 21 to determine the control action. Deliver to unit 25. All counters are operated by a cell clock every 2,726 µC, regardless of whether they are valid or idle, and the counters corresponding to the specified count specification are reset at the same time the cell control signal is sent to the header intercommunication module.

The present invention configured and implemented as described above can be performed on all broadband user traffic from 16Kbps to 150Mbps, and in particular, it can realize functions such as stepwise VBR traffic or Fast Reservation Protocol (FRP). In this case, the control information according to the negotiation parameter change of the management plane is faithfully followed, and there is an effect of efficient cell control.

Claims (3)

A header data control method applied to a control device that performs a user parameter control function in an ATM cell control module of a STM-1 class centralized broadband network termination device, comprising: receiving a data cell header from a common ATM access module and receiving a virtual channel value (VCI). 1) (10 to 13) and the first step (10 to 13) to investigate whether the cell violation by extracting the control bit value and the cell loss bit value for the corresponding virtual channel, Then, if cell violation occurs and the cell loss value is 0, the cell tagging is determined. If the cell loss value is 1, the second step (14, 15, 18, 19) is determined. 14,15,18,19) After execution, it transmits the control result signal according to the non-violation and the violation by the mutual communication module so that it becomes the input of ATM header configuration and resets the corresponding counter to monitor and control the cell in one cell cycle. A number having a third stage (16, 17) of terminating The header data control method characterized in that it is carried out. The method of claim 1, wherein the cell violation determination in the first step (10 to 13) is performed by monitoring a user traffic using a binary counter. A header data control device that performs a user parameter control function among ATM cell control modules of a STM-1 class centralized network termination device, wherein the cell clock receives a cell header immediately following a virtual channel value (VCI) and a cell. A header data extracting means 26 for extracting and outputting a loss value CLP and sending the extracted virtual channel value to an external ATM connection control unit 20 to output control information from the ATM connection control unit 20; Control information extraction means for receiving control information from an external ATM connection control unit 20 and extracting and outputting a control coefficient value, a coefficient designation value corresponding to a virtual channel value of the current cell, and a match flag value of a cell validity determination ( 24), and receives control coefficient values and monitoring coefficient values from the control information extracting means 24 and the header data extracting means 26 to determine whether the negotiation parameters of the current data cell are violated, Control behavior determining means 25 for controlling communication with the intercommunication module in accordance with a control signal of the ATM state control unit 21 of the present invention, and a cell clock and a byte clock input from an external common ATM connection module 22. It is driven by a drive signal generating means 27 for outputting a drive clock and a cell clock input from the external common ATM connection module 22, in accordance with a coefficient designation value specified by an external ATM state control unit 21. And data cell monitoring means (28) for extracting a coefficient value of the virtual channel and outputting the coefficient value of the virtual channel to the control behavior determining means (25).