KR101078846B1 - Residential gateway with ethernet switch for ensuring quality of service - Google Patents

Abstract

The present invention relates to a subscriber gateway device for guaranteeing a quality of service of an Internet video phone user using an Ethernet switch chip.

In order to guarantee the quality of service of the video data by using the Ethernet switch chip in the subscriber gateway device, it is possible to apply the priority to the uplink traffic and the downlink traffic, and process the packets of the traffic according to the applied priority.

Accordingly, by installing an Ethernet switch chip in a subscriber gateway device providing an Internet service including an Internet video phone service, even if a plurality of user terminal devices are connected and the traffic is congested, the quality of service can be satisfied. The quality of the uplink traffic as well as the downlink traffic of the video phone packet can be guaranteed. In addition, even if the traffic is congested, it is possible to satisfy the Internet video phone service quality to prevent the phenomenon such as broken video.

 Residential Gateway, Subscriber Gateway Device, QoS, Ethernet Switch, Traffic Processing, Internet Video Phone Service

Description

Residual gateway with ethernet switch for ensuring quality of service

1 is a block diagram of a subscriber gateway device according to an embodiment of the present invention.

2 is a structural diagram of an Ethernet switch chip according to an embodiment of the present invention.

3 is a diagram illustrating an example of downlink traffic processing of a subscriber gateway device according to an embodiment of the present invention.

4 is a diagram illustrating an uplink traffic processing example of a subscriber gateway device according to an embodiment of the present invention.

The present invention relates to a subscriber gateway device which is a home gateway for connecting to an external large-capacity network, and more particularly, to a subscriber gateway device capable of ensuring the quality of Internet video phone service.

Currently, when a service provider provides a service to an Internet service subscriber, even if the bandwidth of a digital subscriber line connecting the service provider to a subscriber gateway device (RG) is up to 100 Mbps, the network used when the service provider desires the service. Quality of Service (QoS) for high quality service is not guaranteed depending on the traffic conditions. In this case, the subscriber gateway device refers to a home gateway that is a connection device that enables home networking by being located at a boundary inside and outside a home as a bridge between the Internet or a wide area service network and a home network.

In this case, asymmetric service such as xDSL, which collectively refers to various variants of DSL (Digital Subscriber Line) such as ADSL, HDSL, and RADSL, allocates wide bandwidth to downlink traffic, but narrow bandwidth is allocated to upstream traffic compared to downlink traffic. It is becoming. As such, most of the services provided by the Internet service carriers provide a lot of bandwidth for downlink traffic. However, in the case of a service such as a video phone, the uplink and downlink traffic between the user and the user must be guaranteed at the same time to ensure smooth service. In this case, the quality of service for downlink traffic as well as the upstream traffic from the user should be guaranteed.

However, the current service type stays in a service that simply increases the bandwidth of the digital subscriber line connecting the Internet, rather than guaranteeing the service quality of such upstream and downstream traffic. In this way, some problems arise when a service provider provides a service to a subscriber. For example, the carrier does not increase the bandwidth to the subscriber indefinitely, the service provided by the carrier to the subscriber gateway device may not be provided to only a specific user to guarantee only the specific quality of service, and the subscriber gateway. In addition to the service terminal device which should guarantee the quality of service, a device such as a user terminal device is connected to the device, so that a function of guaranteeing the quality of a specific service is required in the subscriber gateway device.

In particular, when several user terminal devices are connected to the subscriber gateway device, and the bandwidth of the traffic generated from the user terminal device is higher than the bandwidth of the digital subscriber line allocated from the service provider, the subscriber may be caused by traffic collision in the subscriber gateway device. The bandwidth of the service used by each user terminal connected to the gateway device may not be guaranteed. In order to solve this problem, in general, an attempt has been made to guarantee the quality of service for a particular service by using a processor inside the subscriber gateway device. It is hard to improve.

Accordingly, the present invention is to solve the problems of the prior art as described above, and provides a subscriber gateway device that can satisfy the quality of Internet video phone service of the user by using an Ethernet switch chip.

In addition, the present invention provides a subscriber gateway device that can guarantee service quality for uplink traffic as well as downlink traffic by applying priority information.

In the subscriber gateway device for providing an Internet video phone service provided by a telecommunications operator terminal device to a user terminal device through the Internet according to a feature of the present invention for achieving the technical problem of the present invention, the telecommunications carrier terminal over the Internet A first interface for performing packet transmission and reception with a device; A second interface for performing packet transmission and reception with the user terminal device; And processing downlink traffic packets provided from the communication service provider terminal device through the first interface and providing them to a second interface, and adding priority information to uplink traffic packets provided from the user terminal device through the second interface. Based on this, an Ethernet switch chip for processing the packet and providing it to the first interface.

In this case, the Ethernet switch chip, a media access control unit including an output queue for storing the uplink traffic packet and the downlink traffic packet according to priority information; A priority information adding unit for adding priority information to the uplink traffic packet provided through the second interface; And an Ethernet packet memory unit which sequentially stores packets output from the output queue and outputs the packets to the first interface or the second interface.

The first and second interfaces may include an Ethernet connection jack connected to the user terminal device or the service provider terminal device to receive and provide a service packet; An Ethernet magnetic device connected to the Ethernet connection jack and outputting the service packet by matching an impedance between the service provider terminal device and the user terminal device; And Ethernet physical to connect the Ethernet magnetic and the Ethernet switch chip to convert the signal output from the Ethernet magnetic into a digital signal and output the digital signal.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.

Now, a subscriber gateway device using an Ethernet switch chip according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a subscriber gateway device according to an embodiment of the present invention.

Referring to FIG. 1, a subscriber gateway device capable of guaranteeing a quality of service of a subscriber includes a first interface 100 for transmitting and receiving a packet with a communication operator terminal device over the Internet, and a second packet for transmitting and receiving a packet with a user terminal device. The interface 200, the first interface 100 or the second interface 200 and the central processing unit 500 and the third interface 300 to perform the packet transmission and reception, the Ethernet switch chip 400 and the central processing unit 500 ).

The first interface 100 includes a carrier Ethernet connection jack 110, an Ethernet magnetic 120, and an Ethernet physical (PHY: also referred to as PHY) 130. The second interface 200 includes a user Ethernet connection jack 210, a four port magnetic (also referred to as a second Ethernet magnetic) 220, and an eight port Ethernet PHY (also referred to as a second Ethernet PHY) 230. The third interface 300 includes an Ethernet PHY 320 and an Ethernet magnetic 310. Here, among the elements constituting the second interface 200, the four-port magnetic 220 and the eight-port Ethernet PHY 230 and the third interface 300, the Ethernet PHY 320 and the Ethernet magnetic 310 The same function as the Ethernet magnetic 120 and the Ethernet PHY 130 constituting the first interface 100.

Ethernet magnetic (120, 310) or four-port magnetic 220 and Ethernet physical 130 and carrier Ethernet connection jack 110, four-port magnetic 220 and user Ethernet connection jack 210 or four-port magnetic 220 and Located between the Ethernet PHY (320) and functions as a transformer (Transformer).

Ethernet processes signals in digital form when processing them, but when an actual Ethernet cable transmits a signal, it transmits the signal through Manchester coding method. Digital is represented by 0 and 1. For example, if 0 is represented by 0V and 1 is represented by 5V, it is difficult to distinguish 0 and 1 when external noise invades the cable. Coding is required. That is, a scheme in which 0 represents voltage when the voltage is generated on the negative side of 0V, 1 denotes 0V when the voltage occurs on the reference positive side, or vice versa is referred to as Manchester coding.

Even though the cable signal is transmitted using the Manchester coding method, it is necessary to transmit the signal over the Ethernet cable of up to 100 meters, so impedance matching is important to reduce reflection due to the impedance difference between the transmitting side and the receiving side. . Therefore, Ethernet magnetic (120, 310) or 4-port magnetic (220) electrically separates the primary side (input side) and secondary side (output side)-the general transformer electrically separates the primary side and the secondary side, the signal transmission is magnetic It is the same as the form to transmit to-responsible for impedance matching.

The Ethernet PHY (130, 320) or the 8-port Ethernet PHY (230) converts the signal passing through the Ethernet magnetic (120, 310) or 4-port magnetic (220) into a digital signal to the MAC (Media Access Control, MAC or media) (Also referred to as an access control unit) (see FIG. 2, 420) or a central processing unit 500. The user ethernet connection jack 210 and the service provider ethernet connection jack 110 function to connect the terminal device of the user with the subscriber gateway device.

The central processing unit 500 manages the overall operation of the subscriber gateway device, and the traffic received through the operator Ethernet connection jack 110 of the first interface 100 and the user Ethernet connection jack 210 of the second interface 200. It performs the function of controlling.

The Ethernet switch chip 400 includes an Ethernet MAC / PHY and performs a function of transferring packet data between blocks. That is, by comparing the MAC address and the MAC address of the carrier connected to the carrier Ethernet connection jack 110, if the compared two MAC address is matched to deliver a service packet to the user terminal connected to the user Ethernet reverse jack 210 Function The detailed structure of the Ethernet switch exchanging the packet data as described above will be described with reference to FIG.

2 is a structural diagram of an Ethernet switch chip according to an embodiment of the present invention.

Referring to FIG. 2, the Ethernet switch chip includes PHYs 431 and 432, MACs 421 and 422, Ethernet packet memory unit 410, and a switching controller connected to the first interface 100 and the second interface 200, respectively. 440 and the priority information adding unit 450.

The PHY 431 is connected to the first interface 100 to perform packet transmission and reception with a communication service provider through the Internet, and the PHY 432 is connected to the second interface unit 200 to transmit and receive packets with the user terminal device. To perform. In particular, the PHYs 431 and 432 transmit incoming service packets to the MACs 421 and 422 to be processed.

The MACs 421 and 422 include output queues (423 shown in Figs. 3 and 4 below) and store packets in the output queue 423 according to priority.

The Ethernet packet memory unit 410 functions to sequentially store the service packet input through the terminal port through which the service packet is input and output. The switching controller 440 functions to sequentially call the packet data of the Ethernet packet memory unit 410 to control the driving of the MACs 421 and 422. In addition, after driving the MAC configured at the rear end of the Ethernet packet memory unit 410, the packet data stored in the Ethernet packet memory unit 410 is sequentially called and input to the MACs 421 and 422, and then through the PHYs 431 and 432. Output to the termination port.

The priority information adding unit 450 functions to provide priority to packets transmitted through uplink traffic. Since the packet transmitted from the user terminal device (eg, video phone, PC, etc.) does not have priority information, in the embodiment of the present invention, the priority information adding unit 450 is placed at the front end of the output queue 423. Locate and add priority information to the packet transmitted from the user terminal.

Next, the operation of the subscriber gateway device for guaranteeing the quality of the video data provided according to the downlink traffic and the uplink traffic will be described in detail based on this structure.

First, an operation of processing downlink traffic based on FIG. 3 will be described.

3 is a diagram illustrating an example of downlink traffic processing of a subscriber gateway device according to an embodiment of the present invention.

In general, when providing an Internet service, a service provider does not provide priority information for guaranteeing the quality of a packet, but when providing an Internet video phone service, provides a priority information to guarantee quality. If the priority information is not provided when providing an Internet video phone service, and the image is broken, the service provider provides a packet including the priority information for service quality.

When the packet including the priority information to be delivered to the predetermined user terminal device is provided from the carrier, the packet is received through the first interface 100 of the subscriber gateway device and then sent to the Ethernet switch chip 400. Delivered.

The Ethernet switch chip 400 stores each packet in the output queue 423 included in the MAC 421 according to priority information provided to ensure quality of service. Specifically, the MAC 421 of the Ethernet switch chip 400 extracts priority information from the received packet, and then stores the packet in the output queue 423 according to the priority information. In this case, as shown in FIG. The packet with the highest priority is first inputted to the output queue 423 (stored in " output queue 0 ") to be processed first, and then predetermined packets are sequentially inputted to the output queue 423 according to the priority.

In the embodiment shown in FIG. 3, the percentage assigned to each output queue 423 is illustrative of processing speed, but is not necessarily limited thereto. In the embodiment of the present invention, the percentage assigned is applied empirically by the Internet service carrier.

According to the applied value, the packet stored in the "output queue 0" to which the fast processing percentage is assigned is processed faster than other packets, so that the quality of the packet can be guaranteed, and many user terminal devices can use the user Ethernet Even if the traffic is congested by being connected to the subscriber gateway device through the connection jack 210, since the packet is processed according to the priority, the quality of service can be guaranteed.

By applying the percentage processing rate assigned to the output queue 423 to the packet, 50% of the video traffic of the packet transmitted from the service provider to the user terminal is applied, and a Voice over IP (VoIP) session to which the 20% processing rate is applied. And a processing speed of a Hypertext Transfer Protocol (HTTP) web session and a File Transfer Protocol (FTP) session to which 10% throughput is applied, but are not necessarily limited thereto. It handles 50% of the video traffic among the allotted 100% throughput first, then processes the traffic for VoIP and HTTP webs with 20% throughput, and finally 10% throughput. Traffic processing proceeds in the order of processing the applied FTP traffic.

In the embodiment to which the processing speed is applied, video traffic is processed first, and even though traffic congestion occurs in the subscriber gateway device, priority is given to processing the video traffic, so that the Internet video phone provided to the user terminal is provided. Guarantee the quality of service for

Next, an uplink traffic processing operation of a subscriber gateway device according to an embodiment of the present invention will be described with reference to FIG.

The upstream traffic refers to a packet transmitted from the user terminal device to the terminal device of the telecommunications operator. The upstream traffic also uses the output queue 423 having the same structure as that of the downlink traffic packet in the same way as the downlink traffic. The packet is processed. However, since the packet transmitted from the user terminal device does not have priority information, an additional step of adding priority information to the packet is required by the priority information adding unit 450 located in front of the output queue 423.

As shown in FIG. 4, when a packet to be delivered to a service provider is provided from the user terminal device, the packet is received through the second interface 200 of the subscriber gateway device and then forwarded to the Ethernet switch 400. Uplink traffic transmitted to the Ethernet switch chip 400 is transmitted to the priority information adding unit 450 through the PHY 432, and priority information is added to the packet to determine the first packet to be processed among the forwarded traffic. .

In this case, as the priority information is added to the packet, the priority information of the downlink traffic delivered to the user terminal device in the form of the first downlink traffic is used as it is, or the priority information is added when the Ethernet switch chip 400 is manufactured. It is possible to use a variety of methods, such as by inputting the priority applied to the empirical value separately by the carrier in the unit 450, and inserting it into the upstream traffic entering the priority information adding unit 450. In the embodiment of the present invention, the priority information input when the Ethernet switch chip 400 is manufactured is used, but is not necessarily limited thereto.

The uplink traffic inserted with the priority information in the priority information adder 450 is transferred to the MAC 422, and the packet is stored in the output queue 423 according to the inserted priority information. The packet is input and stored in the output queue 423 so that it can be processed first. Like the downlink traffic, the upstream traffic can guarantee the quality of the packet stored in the "output queue 0" because the packet stored in the "output queue 0" is processed faster than the other packets.

In this way, for upstream traffic, the service provider establishes and applies a policy for priority information as well as a percentage indicating a processing speed in each output queue 423. In addition, the video phone packet including the fastest processing speed and priority information is stored in the "output queue 0" and communicated through the carrier Ethernet connection jack 110 connected to the Ethernet switch chip 400 chip at a higher speed than other packets. By being delivered to a network including an operator's terminal device, it is possible to provide a video phone packet with a guaranteed quality of service to a counterpart user using an Internet video phone.

Here, a program for realizing a function corresponding to the configuration of the above-described embodiment of the present invention or a recording medium on which the program is recorded is also included in the scope of the present invention.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

According to the above-described embodiment, an Ethernet switch chip is attached to a subscriber gateway device providing an Internet service including an Internet video phone service, so that even if a plurality of user terminal devices are connected and the traffic is congested, the quality of service can be satisfied. .

In addition, priority information may be provided to guarantee quality of uplink traffic as well as downlink traffic of the video phone packet.

 In addition, even if the traffic is congested, it is possible to satisfy the Internet video phone service quality to prevent the phenomenon such as broken video.

Claims (7)

A subscriber gateway device for providing an Internet video phone service provided by a telecommunications operator terminal device to a user terminal device through the Internet, A first interface for transmitting and receiving a packet to and from a communication operator terminal device through the Internet; A second interface for performing packet transmission and reception with the user terminal device; And The downlink traffic packet provided from the communication service provider terminal device is processed and provided to the second interface through the first interface, and priority information is added to the uplink traffic packet provided from the user terminal device through the second interface. Ethernet switch chip for processing the packet to be transmitted to the operator terminal device based on the first interface Subscriber gateway device comprising a. The method of claim 1, The Ethernet switch chip, A media access control unit including an output queue for storing the uplink traffic packet and the downlink traffic packet according to priority information; A priority information adding unit for adding priority information to the uplink traffic packet provided through the second interface; And Ethernet packet memory unit sequentially storing the packets output from the output queue and outputting the packets to the first interface or the second interface Subscriber gateway device comprising a. 3. The method of claim 2, The media access control unit extracts priority information included in the downlink traffic packet, stores the downlink traffic packet in an output queue based on the priority information, and stores the uplink traffic according to the priority information added by the priority information adding unit. Subscriber gateway device for storing packets in an output queue. The method of claim 3, And the priority information is set to a processing rate for processing a packet to be transmitted to the operator terminal device. 5. The method of claim 4, And the priority information is set by the service provider. The method according to claim 1 or 2, The first and second interfaces, An Ethernet connection jack connected to the user terminal device or the service provider terminal device to receive and provide a service packet; An Ethernet magnetic device connected to the Ethernet connection jack and outputting the service packet by matching an impedance between the service provider terminal device and the user terminal device; And Ethernet physical that connects the Ethernet magnetic and the Ethernet switch chip to convert the signal output from the Ethernet magnetic into a digital signal and output the digital signal Subscriber gateway device comprising a. The method according to claim 1 or 2, A central processing unit for controlling the traffic received through the first and second interfaces; And A third interface for transmitting and receiving a packet between the first or second interface and the CPU Subscriber gateway device further comprising.

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