KR100609144B1 - Apparatus for traffic filtering in the home network system and traffic control system using it - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a traffic filtering device in a home network system and a traffic control device using the same.

2. The technical problem to be solved by the invention

The present invention discards unused traffic among large-capacity (1 Gbps) traffic input from an external access network, and delivers the used traffic to the next destination of the home network within the bandwidth of the home gateway (100 Mbps). The purpose of the present invention is to provide a traffic filtering device and a traffic control device using the same in a home network system for matching with a large capacity (1 Gbps) access network using a low capacity (100 Mbps) central processing unit (CPU). .

3. Summary of the Solution of the Invention

The present invention provides a traffic filtering apparatus in a home network system, comprising: filtering setting means for storing destination information according to a traffic selection signal from an external device; And comparing the destination information of the traffic input from the external access network with the destination information stored in the filtering setting means to deliver traffic having the same destination information to the corresponding destination, and discarding traffic having the same destination information. Traffic filtering means for performing traffic filtering.

4. Important uses of the invention

The present invention is used in home network systems and the like.

Home network system, traffic filtering, MAC address, IP address, TCP / UDP port number, application protocol identifier

Description

Apparatus for traffic filtering in the home network system and traffic control system using it}             

1 is a block diagram of an embodiment of a traffic control device interworking with a home network system to which the present invention is applied;

2 is a block diagram of an embodiment of a traffic filtering device in a home network system according to the present invention;

3 is a signal flow diagram of an embodiment of a traffic filtering method in a home network system according to the present invention.

* Explanation of symbols on the main parts of the drawing

10 home network system 11 access network matching device

12: central processing unit 13: traffic filter

14: exchange device 15, 16, 17: home network matching device

18, 19, 20: set top device 211, 221: MAC filter

212, 222: IP filter 213, 223: TCP / UDP port filter

214, 224: Application Filter

The present invention relates to a traffic filtering device in a home network system and a traffic control device using the same, and more particularly, to discard unused traffic among large-capacity (1 Gbps) traffic input from an external access network, and to use the traffic. To be delivered to the next destination of the home network within the bandwidth of the home gateway (100 Mbps), so that the home gateway can be matched with a large capacity (1 Gbps) access network using a low capacity (100 Mbps) central processing unit (CPU). The present invention relates to a traffic filtering device in a home network system and a traffic control device using the same.

In the future, if the home network is implemented in the home, it is expected that an environment where anyone can receive various digital home services regardless of time and place will be established. To this end, it accommodates FTTH (Fiber To The Home), an access network for digital home services that enters the home, and interconnects wired and wireless home network-based devices to connect high-definition television (HDTV: High Definition TeleVision) -class high-quality multimedia-based digital home services. A communication / broadcast convergence type home gateway capable of providing is required. When these home gateways are combined with home servers and integrated with set-top boxes, they will play a central role in the communication and broadcasting of a home.

Meanwhile, home gateways connected to broadband access networks are expected to adopt HDTV-class broadcasting services. Therefore, when a number of HDTV-class broadcasting channels are delivered to the home gateway, specific channels are delivered to the user's home through traffic filtering according to the user's selection.

However, in the conventional home network system, the central processing unit (CPU) of the home gateway needs high performance processing power to process traffic filtering in software. In other words, when 1Gbps of traffic flowed from the access network, a central processing unit capable of processing 1Gbps of traffic was needed.

In addition, in the conventional technology, when IPTV broadcasts of several channels are input to a home gateway using a bandwidth of 1 Gbps, the header of an IP packet must be opened to deliver traffic of these broadcast channels to a next destination. At this time, the opening of the IP packet is performed by the software of the central processing unit, causing a large load on the central processing unit, and there is a serious problem in that it cannot handle the load unless it is a high performance central processing unit.

In addition, even if this problem is solved by using a high performance central processing unit, there is a problem that the price is increased by providing a high performance central processing unit in the home gateway.

The present invention has been proposed to solve the above problems, and discards unused traffic among large capacity (1Gbps) traffic input from an external access network, and uses the traffic within a bandwidth (100Mbps) of the home gateway. A traffic filtering device in a home network system for forwarding to a next destination of a home network, so that a home gateway can be matched with a large capacity (1 Gbps) access network using a low capacity (100 Mbps) central processing unit (CPU), and An object thereof is to provide a traffic control device using the same.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object is a traffic filtering apparatus in a home network system, comprising: filtering setting means for storing destination information according to a traffic selection signal from an external device; And comparing the destination information of the traffic input from the external access network with the destination information stored in the filtering setting means to deliver traffic having the same destination information to the corresponding destination, and discarding traffic having the same destination information. Traffic filtering means for performing traffic filtering.

On the other hand, another apparatus of the present invention is a traffic control apparatus in a home network system, comprising: access network matching means for receiving traffic from an external access network and delivering it to the traffic filtering means; Control means for setting destination information of the filtering setting means by using the traffic selection signal received from an external device, identifying a destination of the traffic received from the traffic filtering means, and delivering the destination to the corresponding home network matching means; The filtering setting means for storing destination information according to the control of the control means; By comparing the destination information of the traffic received through the access network matching means with the destination information stored in the filtering setting means, the traffic having the same destination information is delivered to the corresponding destination, and the traffic having the same destination information is not the same. The traffic filtering means for discarding and performing traffic filtering; And exchange means for identifying a destination of the traffic received from the traffic filtering means and delivering it to the corresponding home network matching means.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an embodiment of a traffic control apparatus interworking with a home network system to which the present invention is applied.

As shown in FIG. 1, a traffic control device interworking with a home network system 10 to which the present invention is applied includes an access network matching device 11, a central processing device 12, a traffic filter 13, and a switching device ( 14) and a plurality of home network matching devices (15, 16, 17).

The access network matching device 11 performs a function of receiving traffic from an external access network and delivering the traffic to the traffic filter 13.

The traffic filter 13 determines whether the traffic received from the access network matching device 11 is the traffic to be transmitted to the switching device 14 or the traffic to the CPU 12 according to the lookup table managed by the traffic filter 13. It performs a function of transmitting to the exchange unit 14 or the central processing unit 12. Conventionally, even traffic destined for a device connected to the exchange device 14 has been passed to the exchange device 14 after passing through the central processing unit 12. Therefore, the computing power of the CPU 12 is consumed a lot. In contrast, the traffic filter 13 reduces the computing power consumption of the central processing unit 12 by separating and forwarding the traffic to the central processing unit 12 and the switching unit 14.

The CPU 12 resides in software having a home gateway function, and manages a lookup table of the traffic filter 13.

The switching device 14 checks the destination of the traffic received from the traffic filter 13 and delivers it to the corresponding home network matching device 16 or 17.

The home network matching device (16, 17) delivers the traffic received from the switching device 14 to the destination set-top device (19, 20). At this time, if the traffic delivered to the destination set-top device (19, 20) is broadcast traffic, the video is displayed on the TV screen, if not the broadcast traffic is terminated by the software of the set-top device (19, 20).

The set-top device 18, 19, 20 is a subscriber signal conversion device, and is generally a home communication terminal required to use a next generation interactive multimedia communication service (so-called interactive TV) such as video on demand (VOD), home shopping, network games, and the like. Say. In general, it is also called a set-top box to mean a box used on the TV set (top).

Meanwhile, the traffic transmitted from the traffic filter 13 to the central processing unit 12 is delivered to the destination set-top device 18 via the home network matching device 15, and in the case of broadcast traffic, the image is displayed on the TV screen. If it is displayed and is not broadcast traffic, it is terminated by software of the set-top device 18.

2 is a block diagram of an embodiment of a traffic filtering device in a home network system according to the present invention.

As shown in Fig. 2, the traffic filter 13 according to the present invention comprises a first traffic filter 21, and a multiple traffic filter of the second traffic filter 22 according to the next destination, wherein the first Each of the traffic filter 21 and the second traffic filter 22 includes MAC filters 211 and 221 for performing filtering based on a media access control (MAC) address, and an Internet protocol (IP). IP filter (212, 222) for filtering based on address, TCP / UDP filter (213, 223) for filtering based on transmission control protocol / user diagram protocol (TCP / UDP) port number, And application filters 214 and 224 for performing filtering based on the identifier of the application protocol.

In particular, the first traffic filter 21 performs filtering on traffic destined for the central processing unit 12, and the second traffic filter 22 performs filtering on traffic destined for the switching device 14. .

To this end, the first traffic filter 21 and the second traffic filter 22 have a plurality of lookup tables set under the control of the CPU 12. The first traffic filter 21 and the second traffic filter 22 compare the destination information (MAC address, IP address, TCP / IP port number, etc.) included in the traffic with a look-up table to determine the next destination (central processing unit ( 12) or traffic that does not need to be delivered to the next destination.

First, when the MAC filter 211 of the first traffic filter 21 receives 1 Gbps Ethernet traffic from the access network matching device 11, a medium access control (MAC) destination address of the Ethernet traffic is received. Filtering is performed by comparing (DA: Destination Address) with the MAC DA set in the MAC lookup table. That is, the MAC filter 211 registers a medium access control (MAC) destination address (DA) extracted from an Ethernet frame received from the access network matching device 11 in the MAC lookup table. Check if there is a registration, and if it is registered, discard it. At this time, the traffic passing through the MAC filter 211 is input to the IP filter (212).

The IP filter 212 extracts an Internet Protocol (IP) address from the Ethernet traffic received from the MAC filter 211 and checks whether the address is registered in the IP lookup table. As a result of the confirmation, if it is registered in the IP lookup table, it is passed. If it is not registered, it is discarded. Traffic passing through the IP filter 212 is input to a Transmission Control Protocol / User Datagram Protocol (TCP / UDP) filter 213.

The TCP / UDP port filter 213 extracts the TCP / UDP port number from the traffic (IP packet) received from the IP filter 212 and compares it with the TCP / UDP port number registered in the TCP / UDP port lookup table. As a result of the comparison, if the TCP / UDP port number extracted from the traffic (IP packet) is registered in the TCP / UDP port lookup table, it is passed. If it is not registered, it is discarded. Traffic passing through the TCP / UDP port filter 213 is passed to the application filter 214.

The application filter 214 extracts information of the application layer from the traffic received from the TCP / UDP port filter 213 and compares it with the information registered in the application lookup table. As a result of the comparison, if they coincide with each other, they are passed.

As such, the first traffic filter 21 is composed of a combination of the MAC filter 211, the IP filter 212, the TCP / UDP port filter 213, and the application filter 214. At this time, since each filter filters the traffic according to the lookup table managed by the filter and transmits the traffic to the destination, the destination of the home gateway (the central processing unit 12) does not need to process the traffic filtering. Therefore, the computing power consumption of the central processing unit 12 can be reduced.

On the other hand, the second traffic filter 22 has the same structure as the first traffic filter 21, except that the destination is the switching device 14. That is, the second traffic filter 22 includes the MAC filter 221, the IP filter 222, the TCP / UDP port filter 223, and the application filter 224 similarly to the first traffic filter 21. Each filter filters traffic according to a lookup table managed by itself (MAC lookup table, IP lookup table, TCP / UDP port number lookup table, application lookup table). At this time, the finally filtered traffic is delivered to the switching device (14).

3 is a signal flow diagram of an embodiment of a traffic filtering method in a home network system according to the present invention.

First, when a user selects a specific channel while watching a program guide broadcast through the TV 31, a corresponding channel selection signal is transmitted to the set-top device 32 (301). Then, the set top device 32 transmits the channel selection signal received from the TV 31 to the central processing unit 33 (302), and the central processing unit 33 receives the channel selection signal received from the set top device 32. In operation 303, lookup table update information is generated. In this case, the lookup table update information is information to be recorded in the lookup table of the traffic filter 34 and includes a MAC address, an IP address, a TCP / UDP port number, an identifier of an application protocol, etc. corresponding to the channel selection signal.

Meanwhile, the CPU 33 transmits the lookup table update request signal to the traffic filter 34 (304), and the traffic filter 34 generates the lookup table according to the request (control) of the CPU 33. Update (305). At this time, the CPU 33 requests (controls) an update of the lookup table through its local bus.

Thereafter, the broadcast traffic 306 input from the access network matching device 35 is filtered by the traffic filter 34 according to the selected channel so that the traffic corresponding to the channel selected by the user is transmitted through the set-top device 32. 307, 308.

As such, the present invention filters the traffic input at 1 Gbps according to channel selection so that the central processing units 12 and 33 of the home network system 10 can fulfill the function of the home gateway even if they do not have the processing capacity of 1 Gbps.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, discards the unused traffic from the home gateway among the large-capacity (1 Gbps) traffic input from the external access network, and transfers the used traffic to the next destination of the home network within the bandwidth (100 Mbps) of the home gateway. By transmitting, the home gateway can use a low capacity (100 Mbps) central processing unit to match a high capacity (1 Gbps) access network.

In addition, the present invention, since 100 Mbps or less traffic used in the final destination of the 1Gbps Ethernet traffic received from the home gateway through the access network to the home network, there is an effect that can solve the traffic congestion of the home network.

Claims (8)

In the traffic filtering device in a home network system, Filtering setting means for storing destination information according to a traffic selection signal from an external device; And By comparing the destination information of the traffic received from the external access network with the destination information stored in the filtering setting means, the traffic having the same destination information is delivered to the corresponding destination, and the traffic having the same destination information is discarded. Traffic filtering means for performing traffic filtering Traffic filtering device in a home network system comprising a. The method of claim 1, The destination information, In the home network system, characterized in that it includes one or more of the following information: MAC (Media Access Control) address, Internet Protocol (IP) address, Transmission Control Protocol / User Diagram Protocol (TCP / UDP) port number, Application Protocol Identifier. Traffic filtering device. The method of claim 1, The filtering setting means, Medium access control (MAC) address setting means for storing a medium access control (MAC) address according to a traffic selection signal from an external device; An Internet Protocol (IP) address setting means for storing an Internet Protocol (IP) address according to a traffic selection signal from an external device; TCP / UDP port number setting means for storing a transmission control protocol / user diagram protocol (TCP / UDP) port number according to a traffic selection signal from an external device; And Means for setting an application protocol identifier storing an application protocol identifier according to a traffic selection signal from an external device Traffic filtering device in a home network system comprising a. The method of claim 3, wherein The traffic filtering means, Check whether the medium access control (MAC) destination address (DA) of the traffic received from the external access network is stored in the medium access control (MAC) address setting means. Medium access control (MAC) filtering means for passing the received traffic and discarding the received traffic if it is not stored; Check whether the internet protocol (IP) address of the traffic received from the medium access control (MAC) filtering means is stored in the internet protocol (IP) address setting means. Internet protocol (IP) filtering means for discarding the received traffic if not already; Check whether the TCP / UDP port number of the transmission control protocol / user diagram protocol (TCP / UDP) port of the traffic received from the IP protocol filtering means is stored in the TCP / UDP port number setting means. TCP / UDP filtering means for passing traffic and discarding the received traffic if it is not stored; And Check whether the application protocol identifier of the traffic received from the TCP / UDP filtering means is stored in the application protocol identifier setting means, and if it is stored, pass the received traffic; Application protocol filtering means for retirement Traffic filtering device in a home network system comprising a. The method according to any one of claims 1 to 4, And said filtering setting means and said traffic filtering means are each composed of multiple. In the traffic control device in a home network system, Access network matching means for receiving traffic from an external access network and delivering it to the traffic filtering means; Control means for setting destination information of the filtering setting means by using the traffic selection signal received from an external device, identifying a destination of the traffic received from the traffic filtering means, and delivering the destination to the corresponding home network matching means; The filtering setting means for storing destination information according to the control of the control means; By comparing the destination information of the traffic received through the access network matching means with the destination information stored in the filtering setting means, the traffic having the same destination information is delivered to the corresponding destination, and the traffic having the same destination information is not the same. The traffic filtering means for discarding and performing traffic filtering; And Exchange means for identifying the destination of the traffic received from the traffic filtering means to deliver to the home network matching means Traffic control apparatus in a home network system comprising a. The method of claim 6, The destination information, In the home network system, characterized in that it includes one or more of the following information: MAC (Media Access Control) address, Internet Protocol (IP) address, Transmission Control Protocol / User Diagram Protocol (TCP / UDP) port number, Application Protocol Identifier. Traffic control device. The method according to claim 6 or 7, And said filtering setting means and said traffic filtering means are each composed of multiple devices.

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