KR20000034325A - Apparatus for controlling connection acceptance to support multiple qos and method thereof - Google Patents

Abstract

PURPOSE: An apparatus for controlling connection acceptance to support multiple qos and method thereof are provided, considering properly traffic parameters such as peak cell rate, sustained cell rate, maximum burst size, minimum cell rate, etc., latency characteristics, service quality grades, etc., according to traffic kinds. CONSTITUTION: A traffic kind classification device(101) discriminates what kind of traffic characteristics the connection requested traffic has. A service quality grade classification device(102) determines a service quality grade that a connection requested variable bit rate(VBR) belongs to. An equivalent band calculator(103-105) gets equivalent bands to meet service qualities, based on the value of a peak cell rate(PCR). An equivalent band calculator(106) gets equivalent bands, based on the value of a minimum cell rate(MCR). A connection acceptance determination device(107) judges whether so much bands to approve the connection of the connection requested traffic remains.

Description

Connection Acceptance Control Device Supporting Multiple Quality of Service and Its Method

The present invention provides a connection acceptance control device and method for determining whether a connection is accepted by inputting a traffic type, a traffic parameter, and a band of an output link extracted from a traffic descriptor declared by a user when a connection establishment request signal is received. And a computer-readable recording medium having recorded thereon a program for realizing the same.

Connection acceptance control manages traffic by approving or rejecting a newly requested connection by determining whether a new connection can be accepted by the system in order to efficiently use network resources while providing service quality required by service users. And to control.

Conventionally, a connection acceptance control method that assumes a maximum cell rate (PCR) as an equivalent band, and a connection acceptance control method that assumes an average cell rate (SCR) as an equivalent band are used.

However, the method of assuming a maximum cell rate (PCR) as an equivalent band does not consider the delay variation in the case of the constant bit rate (CBR) connection, and thus does not satisfy the required quality of service. : VBR) connection has a problem of reducing efficiency by reducing the number of connections that can be allocated to the output link, and the method of assuming an average cell rate (SCR) as an equivalent band does not satisfy the required quality of service. there was. In addition, the control method for the case of Available Bit Rate (ABR) and Unspecified Bit Rate (UBR) connection has not been previously considered.

The present invention devised to solve the above problems, the maximum cell rate (PCR), average cell rate (SCR), maximum burst size (MBS), minimum cell rate (Minimum Cell Rate) for each traffic type : Provides a connection acceptance control device which performs connection acceptance control in consideration of traffic parameters, delay characteristics, and quality of service, such as MCR), and a method thereof, and a computer-readable recording medium recording a program for realizing the same. There is a purpose.

1 is an exemplary configuration diagram of a connection acceptance control apparatus supporting multiple quality of service according to the present invention;

2 is a Markovian ON / OFF model diagram modeling typical variable bit rate (VBR) traffic.

Figure 3 is a flow diagram of one embodiment of a connection acceptance control method for supporting multiple quality of service according to the present invention.

4 is a detailed flowchart illustrating an equivalent band calculation of the equal bit rate (CBR) connection of FIG. 3 according to the present invention.

FIG. 5 is a detailed flowchart of an embodiment of an equivalent band calculation process of the available bit rate (ABR) connection of FIG. 3 in accordance with the present invention. FIG.

6 is a detailed flowchart illustrating an equivalent band calculation process of the real-time variable bit rate (rt-VBR) connection of FIG. 3 according to the present invention.

FIG. 7 is a detailed flowchart illustrating an equivalent band calculation process of the non-real time variable bit rate (nrt-VBR) connection of FIG. 3 according to the present invention. FIG.

8 is a general ATM traffic type determination method.

* Explanation of symbols for the main parts of the drawings

101: traffic type separator 102: quality of service classifier

103: equivalent band calculator using PCR

104: Equivalent band calculator using PCR0 + 1, SCR0 + 1, MBS0 + 1 and delay characteristics

105: Equivalent Bandwidth Calculator Using PCR0, SCR0, MBS0, and Delay Characteristics

106: Equivalent Bandwidth Calculator Using Minimum Cell Rate (MCR)

107: Connection Acceptor

The present invention for achieving the above object, in the connection acceptance control apparatus, receives a connection establishment request signal from the service user, the connection establishment requested traffic is constant bit rate (CBR), real-time variable bit rate (real-time) Variable Bit Rate (rt-VBR), non-real-time Variable Bit Rate (nrt-VBR), Available Bit Rate (ABR), and Unspecified Bit Rate (UBR) Traffic type discrimination means for determining whether the traffic characteristics are present; Receives real-time and non-real-time variable bit rate (VBR) traffic connection establishment request signal from the traffic type classification means, and classifies a service quality class that classifies a service quality class to which the connection-required variable bit rate (VBR) traffic belongs. Way; First equivalent band calculation means for receiving a connection establishment request signal from the traffic type classification means and the service quality class classification means, and obtaining an equivalent band of the traffic for which connection setting is requested according to the type of traffic; Receiving a connection establishment request signal having an equivalent band calculated from the first equivalent band calculation unit, and receiving an undefined bit rate (UBR) traffic connection establishment request signal from the traffic type classification unit, and connecting the requested traffic according to the type of traffic. It includes a connection acceptance determination means for determining whether there is a band remaining to approve.

In addition, the method of the present invention, the connection acceptance control method applied to the connection acceptance control device, comprising: a first step of receiving a connection establishment request signal from a service user, and determines the characteristics of the connection establishment requested traffic; As a result of the determination in the first step, if the connection establishment request for the identity bit rate (CBR) traffic is calculated, the equivalent bandwidth of the requested connection establishment operation is calculated, and the connection establishment request is added to the sum of the equivalent bands of the already-equalized identity bit rate (CBR) traffic. A second step of adding the equivalent bands of the traffic and comparing the value with the band allocated to the constant bit rate (CBR) to control connection acceptance; As a result of the determination in the first step, if the connection establishment request for the variable bit rate (VBR) traffic is calculated, the equivalent bandwidth of the traffic requesting the connection establishment is calculated, and the connection establishment request is added to the sum of the equivalent bands of the already-connected variable bit rate (VBR) traffic. A third step of controlling connection acceptance by adding the equivalent bands of the traffics and comparing the value with a band allocated to a variable bit rate (VBR); As a result of the determination in the first step, if the connection establishment request for the available bit rate (ABR) traffic is calculated, the equivalent bandwidth of the requested connection establishment is calculated, and the connection establishment request is added to the sum of the equivalent bands of the available bit rate (ABR) traffic already connected. A fourth step of adding up the equivalent bands of one traffic and comparing the value with the band allocated to the available bit rate (ABR) to control connection acceptance; And as a result of the determination of the first step, if the connection establishment request for the undefined bit rate (UBR) traffic is added, the number of traffics already connected (Nubr) plus 1 is the allowable number of unregulated bit rate (UBR) traffic (# And a fifth step of controlling connection acceptance in comparison with the < RTI ID = 0.0 >

The present invention also provides a connection acceptance control device having a processor, comprising: a first function of receiving a connection establishment request signal from a service user and determining a characteristic of the connection establishment requested traffic; If the connection setup request for the constant bit rate (CBR) traffic is calculated, the equivalent band of the traffic for which connection establishment is requested is calculated, and the equivalent band of the connection setup requested traffic is added to the sum of the equivalent bands of the already-equipped content bit rate (CBR) traffic. A second function of controlling the connection acceptance by comparing the value with a band allocated to an identity bit rate (CBR); If the connection establishment request of the variable bit rate (VBR) traffic is calculated, the equivalent band of the traffic requesting the connection establishment is calculated, and the equivalent band of the connection establishment requested traffic is added to the sum of the equivalent bands of the already-connected variable bit rate (VBR) traffic. A third function of controlling the connection acceptance by comparing the value with the band allocated to the variable bit rate VBR; If the connection setup request of available bit rate (ABR) traffic is calculated, the equivalent band of the connection requesting traffic is calculated, and the equivalent band of the connection requesting traffic is added to the sum of the equivalent bands of available bit rate (ABR) traffic already connected. A fourth function of controlling the connection acceptance by comparing the value with the band allocated to the available bit rate ABR; And if the connection establishment request of the unregulated bit rate (UBR) traffic is controlled, the number of already connected traffic (Nubr) plus 1 is controlled by comparing the number of unregulated bit rate (UBR) traffic (#) with the allowable number. A computer readable recording medium having recorded thereon a program for realizing a fifth function is provided.

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

1 is an exemplary configuration diagram of a connection acceptance control apparatus supporting multiple quality of service according to the present invention.

First, the traffic type separator 101 determines that the traffic requested for connection is the identity bit rate (CBR), the real time variable bit rate (rt-VBR), the non-real time variable bit rate (nrt-VBR), the available bit rate (ABR), and the undefined bit rate (UBR). ) To determine which traffic characteristics.

The quality of service classifier 102 determines the quality of service class to which the connection requested variable bit rate (VBR) traffic belongs.

The equivalent band calculator 103 using the maximum cell rate (PCR) obtains an equivalent band capable of satisfying the quality of service based on the maximum cell rate (PCR) value of the traffic requested for connection.

Equivalent band calculator 104 considering PCR0 + 1, SCR0 + 1, MBS0 + 1 and delay characteristics has a quality of service class specified in I.356, International Telecommunication Union (hereinafter referred to as "ITU-T"). An equivalent band is obtained to satisfy the quality of service of the non-three variable bit rate (VBR) traffic. The equivalent band calculator 105 considering the PCR0, SCR0, MBS0, and delay characteristics can satisfy the service quality of the variable bit rate (VBR) traffic having a service quality class of 3 specified in ITU-T specification I.356. Get

The equivalent band calculator 106 using the minimum cell rate (MCR) obtains the equivalent band based on the minimum cell rate (MCR) value of the available bit rate (ABR) traffic requested for connection.

The connection acceptance determiner 107 determines whether there is a band enough to approve connection of the traffic requested for connection. That is, if the remaining band is larger than the equivalent band obtained from the equivalent band calculator, the connection is accepted, otherwise the connection is rejected.

FIG. 2 is a Markovian ON / OFF model that models typical variable bit rate (VBR) traffic.

T _on is the average time In the On period following the exponential distribution, T is the inverse of the maximum cell rate (PCR) as the minimum cell arrival time. During the On period, cells arrive at the maximum cell rate, and T _off is an Off period that follows an exponential distribution such that the time combined with T _on is equal to the average cell rate (SCR). The units of T, T _on and T _off are seconds.

3 is a flowchart illustrating an embodiment of a connection acceptance control method supporting multiple quality of service according to the present invention.

When a connection request comes in (301), traffic types are identified (302). Here, the constant bit rate (CBR) and the real time variable bit rate (rt-VBR) have real time delay characteristics (303, 304), and the non-real time variable bit rate (nrt-VBR) and the available bit rate (ABR) have non-real time delay characteristics. 305, 306. Then, EBW _new (equivalent bandwidth of connection requested traffic: Effective Band Width _new ) is calculated (307, 308, 309, 310).

For constant bit rate (CBR) traffic, the sum of SEBWcbr (equivalent bands of already connected constant bit rate (CBR) traffic: Sum of Effective Band Width _cbr ) and EBW _new (equivalent bandwidth of connection requested traffic) is C _cbr If it is greater than (band allocated for identity bit rate (CBR)) (311), the connection is rejected (316), otherwise (311), the connection is accepted (315).

For variable bit rate (VBR) traffic, the sum of SEBWvbr (the sum of equivalent bands of already connected variable bit rate (VBR) traffic) and EBWnew (equivalent band of connection requested traffic) is assigned to Cvbr (variable bit rate (VBR)). Band) (313) reject the connection (316), otherwise (313) accept the connection (315).

For available bit rate (ABR) traffic, the sum of SEBWabr (the sum of equivalent bandwidths of already connected ABR traffics) and EBWnew (equivalent band of connection requested traffic) is assigned to Cabr (available bit rate (ABR)). Band) (312) reject the connection (316), otherwise (312) accept the connection (315).

For unqualified bit rate (UBR) traffic, if Nubr (number of already connected traffic) plus 1 is greater than # (number of unqualified bit rate (UBR) traffic allowed) (314), the connection is rejected ( 316, otherwise 314 approve the connection (315).

FIG. 4 is a detailed flowchart illustrating an equivalent band calculation process of the constant bit rate (CBR) connection of FIG. 3 according to the present invention.

As shown in FIG. 3, an equivalent band calculation process for identity bit rate (CBR) connection according to the present invention is performed by calculating θ as shown in [Equation 1] (401).

θ ←-(lnCLR) / B _cbr

Here, CLR is a required cell loss rate, ln is a natural logarithm, and Bcbr is a buffer size allocated to equal bit rate (CBR) traffic.

In this case, it is determined whether θ is 0 (402), and if 0, EBW _new (equivalent band of traffic requested for connection) is taken as the maximum cell rate (PCR) value (404), and if it is not 0, EBW _new (equivalent band of traffic requested for connection). ) Is calculated by [Equation 2] and taken (403).

EBW _new ← PCR * [(e ^θ ) -1] / θ

As described above, the constant bit rate (CBR) traffic may be modeled by a Poisson probabilistic process having a maximum cell rate (PCR) value as an input rate in order to consider cell delay. The equivalent band of identity bit rate (CBR) traffic is obtained as the equivalent band for this Poisson probability process (403).

FIG. 5 is a detailed flowchart of an embodiment of an equivalent band calculation process of the available bit rate (ABR) connection of FIG. 3 in accordance with the present invention. FIG.

As shown in FIG. 3, an equivalent band calculation process of an available bit rate (ABR) connection according to the present invention 310 is performed by first calculating θ as shown in Equation 3 (501).

θ ←-(lnCLR) / B _abr

Here, B _abr is the buffer size allocated to the available bit rate (ABR) traffic.

In this case, it is determined whether θ is 0 (502), and if 0, EBWnew (equivalent bandwidth of connection request traffic) is taken as the minimum cell rate (MCR) value (504), and if not 0, EBWnew (equivalent band of connection request traffic) is obtained. Calculation is taken as in Equation 4 (503).

EBW _new ← MCR * [(e ^θ ) -1] / θ

As described above, the equivalent band of available bit rate (ABR) traffic is obtained as the equivalent band for the Poisson probability process with the minimum cell rate (MCR) as the input rate (503).

FIG. 6 is a detailed flowchart illustrating an equivalent band calculation process of the real-time variable bit rate (rt-VBR) connection of FIG. 3 according to the present invention.

As shown in FIG. 3, an equivalent band calculation process of a real-time variable bit rate (rt-VBR) connection according to the present invention (308) depends on the quality of service grade. In determining the quality of service class (601), if 3, the cell loss priority (CLP) is 0 only, the maximum cell rate (PCR), average cell rate (SCR) according to ITU-T standard I.356. Considering the traffic parameter of the maximum burst size (MBS) (602), if not 3, the maximum cell rate (PCR) of all cells with a cell loss priority (CLP) of 0 or 1 according to ITU-T specification I.356; In step 603, traffic parameters of an average cell rate (SCR) and a maximum burst size (MBS) are considered.

First, burst is calculated by [Equation 5], activity [Equation 6], [epsilon] [Equation 7], [θ] [Equation 8], and rot as [Equation 9] (604). .

burst ← MBS / (9 * ln10 * PCR)

activity ← SCR / PCR

ε ← -lnCLR

θ ← ε * burst * (1-activity)

Where burst is [Equation 5], activity is [Equation 6], and ε is a value obtained from [Equation 7].

rot ← (θ * PCR-B _rtvbr ) * (θ * PCR-B _rtvbr )

Here, θ is a value obtained from Equation 8, and B _rtvbr is a real time variable bit rate (rt-VBR).

Using the calculated rot, θ, and activity, a new rot value is obtained by calculating as shown in Equation 10 (605).

rot ← rot + 4 * B _rtvbr * θ * activity * PCR

Determining whether the obtained θ is 0 (606), if 0, EBW _new (equivalent band of traffic requested for connection) is taken as the maximum cell rate (PCR) value (608); otherwise, EBW _new (equivalent band of traffic requested for connection). Calculated as [Equation 11] and taken (607).

As described above, the equivalent band of real-time variable bit rate (rt-VBR) traffic is obtained as the equivalent band for the Markovian ON / OFF input process (607).

7 is a detailed flowchart illustrating an equivalent band calculation process of the non-real time variable bit rate (nrt-VBR) connection of FIG. 3 according to the present invention.

As shown in FIG. 3, an equivalent band calculation process of a real-time variable bit rate (rt-VBR) connection according to the present invention (309) depends on the quality of service grade. Determining the quality of service class (701), if 3, cell loss priority (CLP) is 0 only cell, the maximum cell rate (PCR), average cell rate (SCR) according to ITU-T standard I.356 Considering the traffic parameter of the maximum burst size (MBS) (702) and, if not 3, the maximum cell rate (PCR) of all cells with a cell loss priority (CLP) of 0 or 1 according to ITU-T specification I.356. The traffic parameters of the average cell rate (SCR) and the maximum burst size (MBS) are considered (703).

First, burst is calculated by [Equation 12], activity [Equation 13], [epsilon] [Equation 14], [θ] [Equation 15], and rot as [Equation 16] (704). .

burst ← MBS / (9 * ln10 * PCR)

activity ← SCR / PCR

ε ← -lnCLR

θ ← ε * burst * (1-activity)

Where burst is [Equation 12], activity is [Equation 13], and ε is a value obtained from [Equation 14].

rot ← (θ * PCR-B _nrtvbr ) * (θ * PCR-B _nrtvbr )

Where θ is a value obtained from Equation 15, and B _nrtvbr is a non-real time variable bit rate (nrt-VBR).

Using the calculated rot, θ, and activity, a new rot value is obtained by calculating as shown in Equation 17 (705).

rot ← rot + 4 * B _nrtvbr * θ * activity * PCR

Determining whether the obtained θ is 0 (706), if 0, EBW _new (equivalent bandwidth of connection requested traffic) is taken as the maximum cell rate (PCR) value (708), and if not 0, EBW _new (equivalent band of connection requested traffic) Calculated as [Equation 18] to take (707).

As described above, an equivalent band of non-real-time variable bit rate (nrt-VBR) traffic is obtained as the equivalent band for the Markovian ON / OFF input process considering the quality of service class (707).

8 is a general ATM traffic type determination method diagram.

In the traffic type divider 101 shown in FIG. The traffic type is determined by looking at a broadband bearer class and ATM transfer capability.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The present invention as described above, by receiving a variety of services to control the connection acceptance to ensure a variety of service quality, there is an effect that can increase the system efficiency.

Claims (14)

In the connection acceptance control device, Receive the connection establishment request signal from the service user, and the traffic requested for connection establishment is constant bit rate (CBR), real-time variable bit rate (rt-VBR), non-real time variable bit rate (non-real). traffic type dividing means for determining which traffic characteristics among -time Variable Bit Rate (nrt-VBR), Available Bit Rate (ABR), and Unspecified Bit Rate (UBR); Receives real-time and non-real-time variable bit rate (VBR) traffic connection establishment request signal from the traffic type classification means, and classifies a service quality class that classifies a service quality class to which the connection-required variable bit rate (VBR) traffic belongs. Way; First equivalent band calculation means for receiving a connection establishment request signal from the traffic type classification means and the service quality class classification means, and obtaining an equivalent band of the traffic for which connection setting is requested according to the type of traffic; Receiving a connection establishment request signal having an equivalent band calculated from the first equivalent band calculation unit, and receiving an undefined bit rate (UBR) traffic connection establishment request signal from the traffic type classification unit, and connecting the requested traffic according to the type of traffic. Acceptance means for determining whether there is a band remaining to approve Connection acceptance control device supporting multiple quality of service made, including. The method of claim 1, The first equivalent band calculating means, Receives an equal bit rate (CBR) traffic connection establishment request signal from the traffic type classification means, and based on a maximum cell rate (PCR) value of the requested traffic, an equivalent band capable of satisfying the quality of service Second equivalent band calculating means obtained; Receives a variable bit rate (VBR) traffic connection establishment request signal that is not a predetermined quality of service grade from the service quality classifying means, and is capable of satisfying the service quality of the variable bit rate (VBR) traffic that is not the predetermined quality of service grade. Third equivalent band calculating means for obtaining a band; A fourth equivalent band that receives a traffic connection setup request signal of a predetermined service quality class from the service quality classifying means and obtains an equivalent band capable of satisfying the service quality of the variable bit rate (VBR) traffic of the predetermined service quality class; Calculation means; And Receives an available bit rate (ABR) traffic connection establishment request signal from the traffic type classification means, and based on a minimum cell rate (MCR) value of the traffic requested for connection establishment, an equivalent band capable of satisfying the quality of service is provided. Fifth equivalent band calculating means obtained Connection acceptance control device supporting multiple quality of service made, including. In the connection acceptance control method applied to a connection acceptance control apparatus, A first step of receiving a connection establishment request signal from a service user to determine a characteristic of the traffic for which connection establishment is requested; As a result of the determination in the first step, if the connection establishment request for the identity bit rate (CBR) traffic is calculated, the equivalent bandwidth of the requested connection establishment operation is calculated, and the connection establishment request is added to the sum of the equivalent bands of the already-equalized identity bit rate (CBR) traffic. A second step of adding the equivalent bands of the traffic and comparing the value with the band allocated to the constant bit rate (CBR) to control connection acceptance; As a result of the determination in the first step, if the connection establishment request for the variable bit rate (VBR) traffic is calculated, the equivalent bandwidth of the traffic requesting the connection establishment is calculated, and the connection establishment request is added to the sum of the equivalent bands of the already-connected variable bit rate (VBR) traffic. A third step of controlling connection acceptance by adding the equivalent bands of the traffics and comparing the value with a band allocated to a variable bit rate (VBR); As a result of the determination in the first step, if the connection establishment request for the available bit rate (ABR) traffic is calculated, the equivalent bandwidth of the requested connection establishment is calculated, and the connection establishment request is added to the sum of the equivalent bands of the available bit rate (ABR) traffic already connected. A fourth step of adding up the equivalent bands of one traffic and comparing the value with the band allocated to the available bit rate (ABR) to control connection acceptance; And As a result of the determination in the first step, if the connection establishment request for the non-regulated bit rate (UBR) traffic is added, the value of the number of non-regulated bit rate (UBR) traffic which is equal to 1 plus the number of traffic (Nubr) already connected is allowed. 5th step of controlling connection acceptance in comparison with Connection acceptance control method supporting multiple quality of service made including. The method of claim 3, wherein The second step, A sixth step of calculating an equivalent band using a Poisson probabilistic process having a maximum cell rate (PCR) as an input rate if the connection establishment request of the constant bit rate (CBR) traffic is requested; A seventh step of determining whether the sum of the equivalent bands of the already-connected equal bit rate (CBR) traffics and the equivalent band of the required connection establishment traffic is greater than the band allocated to the constant bit rate (CBR); An eighth step of approving the connection if the band allocated to the identity bit rate (CBR) is larger as a result of the determination of the seventh step; And As a result of the determination of the seventh step, the ninth step of rejecting the connection if the band allocated to the identity bit rate (CBR) is smaller Connection acceptance control method supporting multiple quality of service made including. The method of claim 4, wherein The sixth step, A natural log (ln) of the required cell loss rate (CLR) divided by the buffer size (B _cbr ) assigned to the equal bit rate (CBR), multiplied by -1, and a value of θ is used to determine whether θ is 0. 10 steps; An eleventh step of setting the equivalent band (EBW _new ) of the traffic for which connection establishment is requested as the maximum cell rate (PCR) when θ is 0 as a result of the determination of the tenth step; And As a result of the determination in the tenth step, if θ is not 0, the maximum cell rate (PCR) is multiplied by a value obtained by subtracting θ power of the natural constant e by 1, and dividing the value by θ to the equivalent band of the required traffic for connection establishment. 12th step with (EBW _new ) Connection acceptance control method supporting multiple quality of service made including. The method of claim 3, wherein The third step, If the connection setup request of the variable bit rate (VBR) traffic is required, the equivalent bandwidth of the connection setup request traffic is determined by considering the maximum cell rate (PCR), the average cell rate (SCR), and the maximum burst size (Sim). A sixth step of calculating an equivalent band using a Markovian ON / OFF model using a traffic parameter such as Size: MBS; A seventh step of determining whether the sum of the equivalent bands of the already-connected variable bit rate (VBR) traffics and the equivalent band of the connection setup requested traffic is greater than the band allocated to the variable bit rate (VBR); An eighth step of approving the connection if the band allocated to the variable bit rate (VBR) is larger as a result of the determination of the seventh step; And As a result of the determination of the seventh step, if the band allocated to the variable bit rate (VBR) is smaller, the ninth step of rejecting the connection Connection acceptance control method supporting multiple quality of service made including. The method of claim 6, The sixth step, If the connection establishment request of the real-time variable bit rate (rt-VBR) traffic among the variable bit rate (VBR) traffic, the maximum cell rate (PCR) considering the equivalent quality of the real-time variable bit rate (rt-VBR) traffic required for connection establishment A tenth step of calculating an equivalent band with a Markobian ON / OFF model using traffic parameters such as average cell rate (SCR) and maximum burst size (MBS); And If the connection establishment request of the non-real time variable bit rate (nrt-VBR) traffic among the variable bit rate (VBR) traffic, the maximum cell rate considering the quality of service class in consideration of the equivalent bandwidth of the non-real time variable bit rate (nrt-VBR) traffic An eleventh step of calculating an equivalent band with a Markobian ON / OFF model using traffic parameters such as PCR, average cell rate (SCR), and maximum burst size (MBS); Connection acceptance control method supporting multiple quality of service made including. The method of claim 7, wherein The tenth step is A twelfth step of determining whether a connection-required real-time variable bit rate (rt-VBR) traffic is the predetermined quality of service class; As a result of the determination in the twelfth step, if the quality of service class is 3, the maximum cell rate PCR0 of the cell of which the CLP bit is 0 is set to the maximum cell rate PCR, and the average cell rate SCR0 is set to the average cell rate SCR. A thirteenth step of making the maximum burst size MBS0 the maximum burst size MBS; As a result of the determination in the twelfth step, if the quality of service class is not 3, the maximum cell rate (PCR0 + 1) of all cells is set to the maximum cell rate (PCR), and the average cell rate (SCR0 + 1) is set to the average cell rate (SCR). A fourteenth step of setting the maximum burst size MBS0 + 1 to the maximum burst size MBS; And The fifteenth step of calculating the equivalent band with a Markobian ON / OFF model using traffic parameters such as the obtained maximum cell rate (PCR), average cell rate (SCR), and maximum burst size (MBS) Connection acceptance control method supporting multiple quality of service made including. The method of claim 8, The fifteenth step, The burst value is obtained by dividing the maximum burst size (MBS) by the natural logarithm (ln) by 10 and the product of 9 and the maximum cell rate (PCR) as the burst, and the average cell rate (SCR) as the maximum cell rate ( 16) dividing the value obtained by PCR) as activity and taking the natural log (ln) to the required cell loss rate (CLR) and multiplying by -1 to ε; Using the burst, activity, and ε obtained in step 16, the value obtained by subtracting the activity from 1 and the product of the burst and ε is θ, θ and the maximum cell rate. (PCR) multiplied by the result of subtracting the buffer size (B _rtvbr ) assigned to the real-time variable bit rate (rt-VBR) to rot, and the buffer size allocated to 4 and the real-time variable bit rate (rt-VBR). A seventeenth step of determining whether the value of θ is 0 after rt is equal to the value obtained by adding rot to a value obtained by multiplying (B _rtvbr ), θ, activity, and maximum cell rate (PCR) by rt; An eighteenth step of setting an equivalent band (EBW _new ) of the traffic for which connection establishment is requested as the maximum cell rate (PCR) when θ is 0 as a result of the determination of the seventeenth step; And As a result of the determination of step 17, if θ is not 0, the square root of rt is obtained by subtracting the buffer size B _rtvbr allocated to the real-time variable bit rate rt-VBR from the product of θ and the maximum cell rate PCR. The 19th step of dividing the value obtained by dividing the value by the product of 2 and θ as the equivalent bandwidth (EBW _new ) of the traffic required for connection establishment. Connection acceptance control method supporting multiple quality of service made including. The method of claim 7, wherein The eleventh step, A twelfth step of determining whether a non-real time variable bit rate (nrt-VBR) traffic required for connection establishment is the predetermined quality of service; As a result of the determination in the twelfth step, if the quality of service class is 3, the maximum cell rate PCR0 of the cell having the CLP bit of 0 is the maximum cell rate PCR, and the average cell rate SCR0 is the average cell rate SCR. A thirteenth step of making the maximum burst size MBS0 the maximum burst size MBS; As a result of the determination in the twelfth step, if the quality of service class is not 3, the maximum cell rate (PCR0 + 1) of all cells is set to the maximum cell rate (PCR), and the average cell rate (SCR0 + 1) is set to the average cell rate (SCR). A fourteenth step of setting the maximum burst size MBS0 + 1 to the maximum burst size MBS; And The fifteenth step of calculating the equivalent band with a Markovian ON / OFF model using the obtained maximum cell rate (PCR), average cell rate (SCR), and maximum burst size (MBS) traffic parameters Connection acceptance control method supporting multiple quality of service made including. The method of claim 10, The fifteenth step, The burst value is obtained by dividing the maximum burst size (MBS) by the natural logarithm (ln) by 10 and the product of 9 and the maximum cell rate (PCR) as the burst, and the average cell rate (SCR) as the maximum cell rate ( 16) dividing the value obtained by PCR) as activity and taking the natural log (ln) to the required cell loss rate (CLR) and multiplying by -1 to ε; Using the burst, activity, and ε obtained in step 16, the value obtained by subtracting the activity from 1 and the product of the burst and ε is θ, θ and the maximum cell rate. Multiplying (PCR) by the result of subtracting the buffer size (B _nrtvbr ) allocated to the non-real time variable bit rate (nrt-VBR) to rot, and assigning rot to 4 and the non-real time variable bit rate (nrt-VBR). A seventeenth step of determining whether the value of θ is 0 after adding rot to a value obtained by multiplying the buffer size B _nrtvbr by θ, the activity, and the maximum cell rate (PCR); An eighteenth step of setting an equivalent band (EBW _new ) of the traffic for which connection establishment is requested as the maximum cell rate (PCR) when θ is 0 as a result of the determination of the seventeenth step; And As a result of the determination of step 17, if θ is not 0, the square root of rt is obtained by subtracting the buffer size (B _nrtvbr ) allocated to the non-real time variable bit rate (nrt-VBR) from the product of θ and the maximum cell rate (PCR). The 19th step of dividing the value obtained by dividing the value by the product of 2 and θ as the equivalent bandwidth (EBW _new ) of the traffic required for connection establishment. Connection acceptance control method supporting multiple quality of service made including. The method according to any one of claims 3 to 11, wherein The fourth step, Calculating an equivalent band using a Poisson probability process having a minimum cell rate (MCR) as an input rate if the equivalent bandwidth of the available bit rate (ABR) traffic is requested; A twenty-first step of determining whether the sum of the equivalent bands of the available bit rate (ABR) traffics already connected and the equivalent band of the traffic requested for connection establishment are greater than the band allocated to the available bit rate (ABR); A twenty-second step of approving the connection if the band allocated to the available bit rate (ABR) is larger as a result of the determination in the twenty-first step; And As a result of the determination of step 21, when the band allocated to the available bit rate (ABR) is smaller, step 23 of rejecting the connection Connection acceptance control method supporting multiple quality of service made including. The method of claim 12, The 20th step, A twenty-fourth step of determining whether θ is 0 by taking the natural log ln to the required cell loss rate CLR, dividing by the buffer size B _abr allocated to the available bit rate ABR, and multiplying -1 by θ. step; A twenty-fifth step if the θ is 0, the equivalent band (EBW _new ) of the traffic for which connection establishment is requested is the minimum cell rate (MCR); And As a result of the determination in the twenty-fourth step, if θ is not 0, the minimum cell rate (MCR) is multiplied by the θ power of the natural constant e and the value obtained by subtracting 1, and the result obtained by dividing the value by θ is equivalent to the bandwidth required for connection establishment 26th step to (EBW _new ) Connection acceptance control method supporting multiple quality of service made including. In the connection acceptance control device having a processor, A first function of receiving a connection establishment request signal from a service user and determining a characteristic of the traffic for which connection establishment is requested; If the connection setup request for the constant bit rate (CBR) traffic is calculated, the equivalent band of the traffic for which connection establishment is requested is calculated, and the equivalent band of the connection setup requested traffic is added to the sum of the equivalent bands of the already-equipped content bit rate (CBR) traffic. A second function of controlling the connection acceptance by comparing the value with a band allocated to an identity bit rate (CBR); If the connection establishment request of the variable bit rate (VBR) traffic is calculated, the equivalent band of the traffic requesting the connection establishment is calculated, and the equivalent band of the connection establishment requested traffic is added to the sum of the equivalent bands of the already-connected variable bit rate (VBR) traffic. A third function of controlling the connection acceptance by comparing the value with the band allocated to the variable bit rate VBR; If the connection setup request of available bit rate (ABR) traffic is calculated, the equivalent band of the connection requesting traffic is calculated, and the equivalent band of the connection requesting traffic is added to the sum of the equivalent bands of available bit rate (ABR) traffic already connected. A fourth function of controlling the connection acceptance by comparing the value with the band allocated to the available bit rate ABR; And If the connection establishment request of the non-regular bit rate (UBR) traffic is requested, the number of already connected traffic (Nubr) plus 1 controls the acceptance of the connection compared to the number of allowable non-regular bit rate (UBR) traffic (#). 5th function A computer-readable recording medium having recorded thereon a program for realizing this.