KR100606345B1 - Apparatus and method for quality of service of differentiated services in 3G GPRS network - Google Patents

Abstract

The present invention provides an apparatus and method for applying a quality of service of a differential service in a 3G GPRS network, comprising: a session table configured to receive and store session information; A classification unit for receiving a packet from an interface card and classifying the packet according to QoS level by referring to the session table; A measuring unit which receives a packet classified by the classification unit and measures a QoS level of the classified packet by referring to the session table; A component unit which receives and measures the packet measured by the measurement unit, displays a grade, and discards the excess packet; A queue for storing graded packets in the configuration unit; By configuring the GTPU card including a scheduler that outputs the packet stored in the queue to an interface card according to a predetermined output method, QoS control can be performed by identifying the characteristics of the actual subscriber when applying DiffServ in a 3G GPRS network. .

Description

Apparatus and method for quality of service of differentiated services in 3G GPRS network}

1 is a block diagram of a general 3G GPRS,

2 is a block diagram of an apparatus for applying a quality of service of a differential service in a conventional 3G GPRS network;

3 is a flowchart illustrating a method of applying a quality of service of a differential service in a conventional 3G GPRS network;

4 is a block diagram of an apparatus for applying a quality of service of a differential service in a 3G GPRS network according to the present invention;

5 is a flowchart illustrating a service quality application method of a differential service in a 3G GPRS network according to the present invention;

FIG. 6 is a conceptual diagram illustrating a processing method according to a PDP context creation request in a method for applying a service quality of a differential service in a 3G GPRS network of FIG. 5.

FIG. 7 is a conceptual diagram illustrating a processing method according to a PDP context deletion request in the method of applying a quality of service of a differential service in the 3G GPRS network of FIG. 5.

Explanation of symbols on the main parts of the drawings

10: terminal 20: SGSN

30: GGSN 40: GTPU card

41, 51: classification unit 42, 52: measurement unit

43, 53: 44, 54: queue

45, 55: scheduler 46: session table

50: interface card 60: QoS management unit

70: service management unit 80: QoS mapping unit

The present invention relates to the application of Quality of Service (QoS) of Differentiated Services (DiffServ) in 3rd Generation General Packet Radio Services (3G GPRS), in particular when applying DiffServ in 3G GPRS networks. The present invention relates to an apparatus and a method for applying a quality of service of a differential service in a 3G GPRS network configured to grasp the characteristics of subscribers and to perform QoS control.

In general, the 3G GPRS network is a packet-based wireless communication service network that was made available in 2000, and provides mobile and computer users with continuous internet access at 56 ~ 114Kbps data rates. GPRS's high-speed data transmission allows users to participate in video conferencing and to communicate with multimedia websites using laptops as well as portable devices. GPRS is based on GSM (Global System for Mobile communication) communications, and will complement existing services such as circuit-switched mobile phones and short message services.

GPRS, a packet-based service, is theoretically less lossy than circuit-switched services, which are entirely assigned to only one user at a time because they use a communication channel to share packets only when they are needed.

GPRS also makes it easier to create tasks for mobile users because the higher data rates no longer require the middleware needed to adapt the task to slower wireless systems. Once GPRS is available, mobile users of virtual private network services (PNs) will be able to continue to access the private network without dial-up connections.

GPRS will complement Bluetooth, the standard for replacing wired connections between wireless devices with wireless connections. In addition to IP (Internet Protocol), GPRS also supports X.25, a packet-based protocol that was used mainly in Europe. GPRS is an evolutionary step towards EDGE (Electronic Data Gathering Equipment) and UMTS (Universal Mobile Telecommunication System).

1 is a block diagram of a general 3G GPRS.

Here, reference numeral 10 is a terminal, 20 is a Serving GPRS Support Node (SGSN), 30 is a Gateway GPRS Support Node (GGSN) that performs a gateway function, and 40 is a GTPU (Geometry & Topology Publications User plane) that processes traffic. Card, and 50 is an interface card.

Therefore, SGSN 20 and GGSN 30 are provided with the GTPU card 40 and the interface card 50 which are single or duplexed. In the case of the WCDMA SGSN / GGSN (20) 30, since the traffic throughput is generally high, and it is difficult to process all the traffic of the SGSN / GGSN (20) 30 with the GTPU card 40, which is a single traffic processing unit. In general, the SGSN / GGSN 20 and 30 are constituted by the GTPU card 40 and the interface card 50, which are several traffic processing devices.

On the other hand, DiffServ is a protocol for assigning and controlling network traffic for each class so that it has priority over other types of general traffic for relatively special types of traffic such that voice should not be interrupted. DiffServ is the most advanced way of managing traffic in the form of a class of service, or Class of Service (CoS). DiffServ uses more complex policies or rules instead of simply tagging priorities to determine how to deliver a given network packet. In a given packet movement rule, a packet is applied with one of 64 possible forward movements called per hop behaviors, or per hop behaviors (PHBs). A six-bit long field called DiffServ code point (DSCP) in the IP header specifies the per-hop movement for a given packet flow.

2 is a block diagram of an apparatus for applying a quality of service of a differential service in a conventional 3G GPRS network.

Where reference numeral 40 is a GTPU card, 50 is a plurality of interface cards, 51 is a classifier in the interface card, 52 is a meter, 53 is a remarker and a dropper. It is a configuration unit (Meter Configuration), 54 is a queue (Queue), 55 is a scheduler (Scheduler), 60 is a QoS Of (Quality Of Service Manager).

Therefore, in order to apply QoS in the conventional GPRS network, the operator predicts the traffic in advance and manually sets the bandwidth for each QoS class, and then operates according to the traffic bandwidth for each QoS set by the operator on the interface card 50.

However, since the QoS is processed according to the type of service (TOS) field for each IP (Internet Protocol) class when setting the traffic bandwidth for each QoS, it is impossible to process according to the actual QoS of each subscriber.

3 is a flowchart illustrating a method of applying a quality of service of a differential service in a conventional 3G GPRS network.

As shown in the figure, when the terminal 10 transmits a PDP context creation request (Create PDP Context Request) to the SGSN 20, the SGSN 20 transmits a PDP context creation request to the GGSN 30 (ST11). (ST12); The GGSN 30 generates a PDP context, transmits a PDP context creation response to the SGSN 20, and transmits a PDP context creation response from the SGSN 20 to the terminal 10. (ST13) (ST14) is performed.

The operation of the prior art will be described in detail with reference to the accompanying drawings.

First, in order to set each QoS, the operator anticipates the traffic for each interface card 50, and the operator sets the traffic bandwidth according to the QoS class for each interface card 50.

The classifying section 51 in the interface card 50 receives the packets and classifies the packets according to the QoS class.

The measurement unit 52 receives the QoS setting information for each class previously set by the operator through the QoS management unit 60 and measures the QoS level of the classified packets.

In the marker configuration 53, the remarker marks the packet according to the grade preset by the operator to mark the packet, and the dropper discards the excess packet.

The QoS class is defined for the classes defined in DiffServ, and is defined as EF, AF1, AF2, AF3, AF4, and DF.

Therefore, in the related art, the bandwidth is set by the operator according to six grades in the remarker of the component 53 and stored in the queue 54.

The scheduler 55 determines how to output the packet stored in the queue 54 and sends it to the GTPU card 40.

Therefore, according to the bandwidth setting, the IP packets are classified into DiffServ classes and QoS processing is performed within each traffic bandwidth.

Each interface card 50 checks the TOS field of the IP packet, guarantees QoS processing for the traffic in the bandwidth, and drops the excess packet.

As described above, after setting the bandwidth for each QoS class, the received packet is processed by the interface card 50.

However, such a conventional technique may waste resources because the bandwidth for each QoS class is set in a state where the actual traffic may not flow, and since the QoS for the subscriber is not known on the actual interface board, the actual QoS processing is impossible. There was this.

That is, since the packet flowing into the interface card is introduced according to the routing, it is not known how much packet is introduced to a specific interface. Therefore, the operator arbitrarily sets the bandwidth for each QoS class, so that the actual QoS processing cannot be performed.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to differentiate the 3G GPRS network in which 3G GPRS networks can perform QoS control by identifying the characteristics of the actual subscribers when applying DiffServ. The present invention provides a service quality application apparatus and a method thereof.

Apparatus for applying a service quality of a differential service in a 3G GPRS network according to an embodiment of the present invention to achieve the above object,

A session table for receiving and storing session information; A classification unit for receiving a packet from an interface card and classifying the packet according to QoS level by referring to the session table; A measuring unit which receives a packet classified by the classification unit and measures a QoS level of the classified packet by referring to the session table; A component unit which receives and measures the packet measured by the measurement unit, displays a grade, and discards the excess packet; A queue for storing graded packets in the configuration unit; The technical configuration of the GTPU card includes a scheduler that outputs the packet stored in the queue to an interface card according to a predetermined output method.

In order to achieve the above object, the service quality application method of the differential service in the 3G GPRS network according to an embodiment of the present invention,

A first step of receiving a PDP context creation request from the terminal in the GGSN; The GGSN is a second step of changing a QoS information setting with a GTPU card; After the second step, the GGSN includes a third step of transmitting a PDP context creation response to the terminal.

Hereinafter, an embodiment according to the present invention, an apparatus for applying a service quality of a differential service in a 3G GPRS network, and a technical concept of the method will be described with reference to the accompanying drawings.

4 is a block diagram of an apparatus for applying a quality of service of a differential service in a 3G GPRS network according to the present invention.

As shown therein, a session table 46 for receiving and storing session information; A classification unit 41 for receiving a packet from the interface card 50 and classifying the packet according to the QoS class with reference to the session table 46; A measuring unit 42 for receiving a packet classified by the classification unit 41 and measuring a QoS level of the classified packet by referring to the session table 46; A component unit 43 for receiving and marking the packet measured by the measuring unit 43 to display a grade and discarding the excess packet; A queue 44 for storing the graded packet in the configuration section 43; The GTPU card 40 is configured by including a scheduler 45 for outputting the packet stored in the queue 44 to the interface card 50 according to a predetermined output method.

5 is a flowchart illustrating a method of applying a quality of service of a differential service in a 3G GPRS network according to the present invention.

As shown therein, a first step (ST21) (ST22) of receiving the PDP context creation request from the terminal 10 in the GGSN (30); The GGSN (30) is a second step (ST23) to change the QoS information settings to the GTPU card (40); After the second step, the GGSN 30 includes a third step (ST24) (ST25) of transmitting a PDP context creation response to the terminal (10).

An apparatus and a method of applying a service quality of a differential service in a 3G GPRS network according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention intends to perform QoS control by grasping the actual characteristics of subscribers when applying DiffServ in 3G GPRS network. Therefore, in the present invention, it is possible to efficiently perform bandwidth allocation for each class during DiffServ operation.

In the prior art, the operator predicted the traffic and manually set the bandwidth for each QoS class in the interface card 50. In contrast, in the present invention, the bandwidth for each QoS class is set as much as the session setup request.

To this end, the QoS processing is performed in the GTPU card 40 instead of the QoS processing in the interface card 50 as in the related art.

The QoS profile transmitted from the terminal 10 when a GPRS session establishment request is included includes information such as a Universal Mobile Telecommunication System (UMTS) QoS Class, Maximum bitrate and Guaranteed bitrate, Tunnel Endpoint Identifier (TEID), DSCP, and the like. have.

Therefore, the DiffServ QoS Class is determined through QoS mapping based on the corresponding information, and the measurement unit 42 sets a bandwidth for the corresponding DiffServ QoS Class based on the Maximum bitrate and Guaranteed bitrate information.

Therefore, the session table 46 receives and stores session information through the service manager 70. Session information includes TEID, DSCP, Upstream Maximum bitrate, Upstream Guaranteed bitrate, Downstream Maximum bitrate, Downstream Guaranteed bitrate.

The classifier 41 receives a packet from the interface card 50 and classifies the packet according to the QoS class with reference to the session table 46.

The measurer 42 receives a packet classified by the classifier 41 and measures the QoS level of the classified packet by referring to the session table 46.

The component part 43 receives the packet measured by the measuring part 42, displays the grade by marking in a remarker, and discards the excess packet using the dropper.

Queue 44 stores graded packets in component 43.

The scheduler 45 outputs the packet stored in the queue 44 to the interface card 50 according to a predetermined output method.

Referring to the operation of the present invention in more detail as follows.

First, the PDP context creation request transmitted from the terminal 10 is transmitted to the SGSN 20. The SGSN 20 then sends a PDP context creation request to the GGSN 30.

When the GGSN 30 receives the PDP context creation request from the terminal 10, the GGSN 30 sets the QoS information to the GTPU card 40 after completing the call processing.

The QoS information is released when the PDP context is deleted, and the QoS information is changed when the PDP context is updated.

After performing such QoS information setting, the GGSN 30 sends a PDP context creation response to the terminal 10 through the SGSN 20.

The process of setting DiffServ measurement according to the requested bandwidth during call processing will be described with reference to FIGS. 6 and 7.

FIG. 6 is a conceptual diagram illustrating a processing method according to a PDP context creation request in the method for applying a service quality of a differential service in the 3G GPRS network of FIG. 5.

Upon receiving the PDP context creation request from the SGSN 20, the GGSN 30 performs admission control according to the requested QoS and performs mapping from UMTS QoS to DSCP.

The session information generated during the call processing includes DSCP, Maximum bitrate, and Guaranteed bitrate information, and is transmitted to the GTPU card 40 which processes the traffic.

The GTPU card 40 configures a meter by accumulating bandwidth according to DiffServ class according to DSCP.

FIG. 7 is a conceptual diagram illustrating a processing method according to a PDP context deletion request in the method of applying a quality of service of a differential service in the 3G GPRS network of FIG. 5.

When the PDP context deletion request is made, the session information of the GTPU card 40 is deleted and the meter is configured by reducing the bandwidth for each DiffServ class according to the previously assigned DSCP.

When requesting a PDP context update, the meter is configured by increasing or decreasing the bandwidth for each DiffServ class according to the previous QoS allocation.

As described above, the present invention performs QoS control by identifying the characteristics of the actual subscriber when applying DiffServ in the 3G GPRS network.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, an apparatus and a method for applying a quality of service of a differential service in a 3G GPRS network according to the present invention have an effect of identifying QoS characteristics of a practical subscriber when applying DiffServ in a 3G GPRS network to perform QoS control. .

In addition, the present invention is able to know in advance how much the packet is introduced by processing the QoS in the GTPU card, there is an advantage that no waste of resources by applying QoS.

In addition, the interface card cannot know which subscriber belongs to the packet, so the characteristics of the subscriber cannot be considered when processing the QoS in the interface card. However, when processing in the GTPU card, the actual QoS control is possible considering the characteristics of the subscriber. As a result, an effective DiffServ QoS application can be applied on the GGSN of the 3G GPRS network.

Claims (2)

A QoS mapping unit for generating a DSCP (Diffserv code point) corresponding to the QoS of the QoS profile included in the PDP context creation request information according to the call connection request for the packet service of the terminal; A server manager which outputs session information of a PDP context corresponding channel generated by the PDP context creation request including the DSCP generated by the QoS mapping unit; A session table for receiving and storing the session information; A classification unit for receiving a packet from an interface card and classifying the packet according to QoS level by referring to the session table; A measuring unit which receives a packet classified by the classification unit and measures a QoS level of the classified packet by referring to the session table; A component unit which receives and measures the packet measured by the measurement unit, displays a grade, and discards the excess packet; A queue for storing graded packets in the configuration unit; And a GTPU card including a scheduler for outputting a packet stored in the queue to an interface card according to a predetermined output method. A first step of receiving, by the GGSN, the PDP context creation request of the terminal from the SGSN ; The GGSN performs QoS mapping to generate a DSCP (Diffserv code point) corresponding to the QoS of the PDP context, outputs session information of the PDP context corresponding channel including the DSCP to a GTPU card, and outputs the session to the GTPU card. A second step of setting QoS information by storing the information in a session table ; After the second step, the GGSN transmits a PDP context creation response for the terminal to SGSN, notifying generation of the PDP context request corresponding PDP context, and inserting the DSCP stored in the session table into a packet input from the session corresponding channel. And applying a third step of outputting the service quality of the 3G GPRS network.

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