WO2014153860A1

WO2014153860A1 - Network access method, gateway and system

Info

Publication number: WO2014153860A1
Application number: PCT/CN2013/077488
Authority: WO
Inventors: 景麟; 王晓晖; 施驰
Original assignee: 深圳创维数字技术股份有限公司; 深圳市创维软件有限公司
Priority date: 2013-03-29
Filing date: 2013-06-19
Publication date: 2014-10-02
Also published as: CN103220276A; CN103220276B

Abstract

The embodiments of the present invention provide a network access method, comprising: when a PPPoE message sent by a terminal is received, detecting a message type of the PPPoE message, wherein the message type comprises a message PPPoED at the sending stage or a message PPP at the session stage, and the PPPoED carrying access identification data; if the message type of the PPPoE message is the PPPoED, obtaining an exit network channel matching the PPPoE message according to the access identification data carried by the PPPoED; and accessing the terminal to a network through the exit network channel. Also disclosed are a gateway and a system. By adopting the present invention, the function of accessing various networks through a single port can be achieved, thereby saving hardware costs and network maintenance costs.

Description

Network access method, gateway and system

This application claims priority to Chinese Patent Application No. 201310110069.5, filed on March 29, 2013, entitled "A Method, Gateway and System for Network Access", the entire contents of which are incorporated by reference. In this application. Technical field

The present invention relates to a communication technology, and in particular, to a network access method, gateway, and system. Background technique

With the development of broadband technology and the rapid development of Internet TV services, the original IPTV (Internet Protocol TV) terminal products cannot meet the business development needs of broadband operators, and operators urgently need to be under the IPTV technology architecture. Introduced Internet TV services. At present, when China's mainstream broadband operators (China Telecom, China Unicom) launch IPTV services, in order to ensure service quality, a dedicated network for IPTV services is set up, and set-top boxes are connected to IPTV service private networks through PPPoE and other means. The Internet TV service needs to be accessible through the traditional public Internet. Therefore, in order to be compatible with these two services on the terminal, the set-top box needs to have the following network access and service capabilities: Access to the public Internet and access to the IPTV service-specific service network.

However, IPTV set-top boxes currently on the market usually have only one port fixedly connected to the IPTV service-specific service network. They are not compatible with both IPTV services and Internet services. Users cannot connect to other network types through set-top boxes, for example: access to the public Internet through set-top boxes. This poses a bottleneck for the business development of broadband operators and does not provide more networks for users to use. However, if the operator installs multiple ports on the set-top box to solve the problem, the set-top box can access multiple networks, which increases the hardware cost and requires connecting two physical network cables, which is neither beautiful nor network. Maintenance costs. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and a gateway for network access. It can realize the function of single port access to multiple networks, saving hardware cost and network maintenance cost.

In order to solve the above technical problem, the embodiment of the present invention provides a network access method, including: when receiving a PPPoE packet sent by a terminal, detecting a packet type of the PPPoE packet, where the packet type includes sending Phase packet PPPoED or session phase packet PPP, the PPPoED carrying access Identification data;

If the packet type of the packet is PPPoED, the egress network channel matching the PPPoE message is obtained according to the access identifier data carried by the PPPoED;

The terminal is connected to the network through the egress network channel.

Correspondingly, an embodiment of the present invention further provides a gateway, including:

a detecting unit, configured to: when receiving a PPPoE packet sent by the terminal, detecting a type of the PPPoE packet, where the text type includes a sending phase, a PPPoED session, or a session phase, a PPP, the PPPoED Carrying access identification data;

a matching unit, configured to: if the packet type of the PPPoE packet is PPPoED, obtain an egress network channel that matches the PPPoE packet according to the access identifier data carried by the PPPoED; The egress network channel connects the terminal to the network.

The present invention also provides a system for network access, comprising: a terminal and a server, and a gateway as described in the above invention.

Embodiments of the present invention have the following beneficial effects:

In the embodiment of the present invention, in the existing digital television terminal and the home media gateway hardware architecture, the PPPoED packet in the transmission phase carries the access capable of discriminating the network type by extending the PPPoED packet in the PPPoE packet. Identifying the data and enabling the digital television terminal to access the corresponding egress network channel by parsing the access identification data. This enables digital TV terminals to support multiple network accesses, enabling existing digital TV terminals to access multiple network types only through software upgrades of digital TV terminals and gateways, eliminating the need for users to replace single-port digital TV terminals. It can realize the function of accessing multiple network types, which not only saves hardware cost, user's use cost, but also saves network maintenance cost. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is merely some embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic structural diagram of a conventional ADSL system networking of the present invention;

2 is a schematic flow chart of a first embodiment of a method for accessing a network according to the present invention; 3 is a schematic flow chart of a second embodiment of a method for network access according to the present invention;

4 is a schematic flow chart of a third embodiment of a method for network access according to the present invention;

FIG. 5 is a schematic flowchart diagram of a fourth embodiment of a method for network access according to the present invention; FIG.

6 is a schematic flow chart of a fifth embodiment of a method for network access according to the present invention;

7 is a schematic structural view of a first embodiment of a gateway according to the present invention;

8 is a schematic structural view of a second embodiment of a gateway according to the present invention;

9 is a schematic structural diagram of a third embodiment of a gateway according to the present invention;

10 is a schematic structural diagram of a fourth embodiment of a gateway according to the present invention;

11 is a schematic structural view of a fifth embodiment of a gateway according to the present invention;

FIG. 12 is a schematic structural diagram of a first embodiment of a network access system according to the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

In the embodiment of the present invention, the terminal may be a digital television set top box, a digital television integrated machine, or the like, and a digital television terminal having a single or two-way digital television function.

Referring to FIG. 1 , it is a flowchart of a first embodiment of a prior art ADSL (Asymmetric Digital Subscriber Line) system networking structure. The following describes the networking structure of the existing ADSL system in detail with reference to Figure 1, and introduces the PPPoE (Point to Point Protocol over Etherne) protocol.

In a specific embodiment, at present, the home user usually accesses the network of the operator by using the ADSL method. The existing ADSL system networking structure can be generally divided into an ADSL transmission system 001, an ATM (Asynchronous Transfer Mode) network 002 and an access server 003. The ADSL transmission system 001 includes a terminal 10 and a demodulator. 11 and the central office device 12, the ADSL transmission system 001 is responsible for the ADSL line codec and transmission of the telephone line segment. The ATM network 002 is responsible for collecting user data from the central office device 12 into the access server 003 in an ATM PVC manner. The access server 003 is an access server that implements the PPPoE function at the central office, and terminates the PPPoE process initiated by the user side. For example, the downlink Ethernet frame is sent from the IP metropolitan area network to the access server 003 via the router, and PPPoE is added. The header is sent to the central office device 003 and encapsulated into an AAL5 frame, which is sent to the demodulator 11 through the cross module, and the AAL5 (ATM Adaptation Layer 5, ATM Adaptation Layer 5) frame recombination is completed by the demodulator 11 and the Ethernet frame is solved. Sending to the terminal 10, the terminal 10 extracts the IP data packet from the PPPoE packet; the uplink PPPoE packet originates from the terminal 10, is encapsulated into an AAL5 frame in the demodulator 11, is transmitted by the ATM cell to the central office device 12, and is set by A good PVC (Permanent Virtual Circuit) is transmitted to the access server 003 for processing. The ATM between the downlink of the central office device 12 and the demodulator 11 is ATM, and the ATM between the uplink of the central office device 12 and the access server 003 is also ATM. The ATM PVC starts between the demodulator 11 and the access server 003. The local device core uses ATM cell multiplexing, has a single structure, and does not require protocol conversion. Because the local device is based on ATM's complete technical design, it can support multiple services, provide different processing measures and different buffer spaces for these services, provide different levels of priority and flow control for different service types, and make different ATM services. The type obtains bandwidth compatible with the service throughout the service transmission line, thereby ensuring high performance quality support from the demodulator 11 to the access server 003.

At present, the telecom operator's home media gateway can be configured with up to 8 channels of PVC, supports AUTO PVC and PVC sharing functions, and supports multi-session of single PVC and multiple PVC. In order to ensure that the Internet and IPTV services do not interfere with each other and ensure the quality of IPTV users, two different PVCs are usually used for Internet and IPTV private network access, and each PVC adopts an independent PPPoE session. In addition, since ATM PVC has a natural security isolation mechanism, when PPPoE authentication is adopted, the PPP session from each terminal 10 to the access access server 003 is also isolated from each other, further enhancing the security mechanism. For example: A terminal with two physical networks and dual PPPoE dial-up to connect to the Internet and IPTV private network simultaneously, achieving dual-network dual standby. In general, the network port type is two RJ45 ports, or one RJ45 port and one WLAN port. When the set-top box uses two RJ45 ports, one of the dedicated IPTV ports connected to the home media gateway uses PPPoE dial-up to access the IPTV private network, and the other one connects to the Internet port of the home media gateway, and also uses PPPoE dial-up mode to access the public. the Internet. Thereby achieving the function of the user accessing multiple types of networks.

Among them, the user dials on the digital line of ADSL, adopts the special dialing protocol PPPoE, and dials directly to the verification server for verification. The user needs to input the user name and password. After the verification is passed, a high-speed user number is established and correspondingly allocated. Dynamic IP. The workflow of the PPPoE protocol includes two phases of discovery and session. The discovery phase is stateless. The purpose is to obtain the Ethernet MAC address of the access server 003 and establish a unique PPPoE session identifier. After the discovery phase is over, it enters the standard PPP session phase. When a terminal 10 wants to start a PPPoE session, it must first perform a discovery phase to identify the Ethernet MAC address of the access server 003 and establish a PPPoE session identifier. In the discovery phase, based on the network topology, the host can discover multiple access servers 003 and then allow the user to select one. When the discovery phase is successfully completed, both the terminal 10 and the selected access server 003 have information that they have established a PPP connection on the Ethernet. Until the PPP session is established, the discovery phase remains stateless in client/server mode. Once the PPP session is established, both the terminal 10 and the access server 003 must allocate resources for the PPP virtual interface.

Further, the PPPoE message is encapsulated in the data field of the Ethernet frame. The Ethernet frame header includes: The destination server MAC address, followed by the address of the access server, the client MAC address, and the Ethernet protocol type. The format of the PPPoE data packet includes: The first 4 bits of the PPPoE data packet are the version field, and the content filled in the domain is 0x01; the version field is followed by the 4-bit type field, and the content filled in the domain according to the protocol It is also 0x01; the code field occupies one byte. The content of this field is different for different P segments of PPPoE. The session identifier occupies two bytes. When accessing the concentrator, no unique session ID is assigned to the user host. The content of the changed domain must be filled with 0x0000; once the host obtains the session ID, then the unique session identifier must be filled in all subsequent messages; the PPPoE Payload length takes up two bytes, and the PPPoE Payload can It consists of multiple TLVs, each of which includes Tag_Type, Tag-Length, Tag_Vlaue.

The PPPoED process during the PPPoE discovery phase may include the following four phases: First, the terminal 10 sends a PADI frame for initialization. This frame will be broadcast over Ethernet, indicating that the access service is being sought; secondly, one or more access servers 003 reply to a PAD0 frame, ie, a response signal is sent to the terminal 10, indicating that the access server 003 is responding to whether a connection is to be established; 10 does not receive PAD0 within the specified time, it will resend the PADI packet, and double the waiting time, this process is generally repeated four times; again terminal 10 selects an access server 003, and sends a unicast PADR frame that is the connection request signal The access server 003 for the response indicates that it is desired to establish a connection; finally, the access server 003 sends a PADS frame, that is, a PPPoE connection confirmation signal, indicating that the connection can be established and the connection number is assigned. This connection number, along with the Ethernet address of the terminal and access server 003, will uniquely identify a PPPoE session. The sending phase message PPPoED is stateless, and the purpose is to obtain the PPPoE access server 003, that is, the Ethernet MAC address of the access server 003 or a unique PPPoE session identifier established by the access server 003, the session identifier data. Stored in the SESSION_ID in the PPPoE message. Among them, in the four steps of the PPPoE discovery phase, the Payload of the PPPoE header always contains A TLV with a Tag_Type of 0x0103: Host-Uniq. Host-Uniq is the host unique identifier, a random number randomly generated by the dialing host. Host-Uniq is similar to the identification field in PPP data packets, and is mainly used to match the sender and receiver. Because there are many PPPoE data messages in the broadcast network.

Further, during the PPPoE session, the PPP process includes: sending some configuration packets to configure the data link; authenticating; configuring the network layer protocol; and transmitting and terminating the PPPoE session. At this time, the user transmits or receives data by accessing the server.

Referring to FIG. 2, it is a flowchart of a first embodiment of a method for network access according to the present invention. As shown in FIG. 2, the steps of a network access method in this embodiment include:

S100: When receiving the PPPoE text sent by the terminal, detecting the type of the PPPoE text, where the text type includes a sending phase, a PPPoED, or a session phase, and the PPPoED carries the access identifier data.

In a specific embodiment, the gateway port is set to be in the bridge mode, and the PPPoE packet is transparently transmitted. The PPPoE (Point to Point Protocol over Ethernet) allows the terminal to connect to a remote access server through a single bridge device. Through the PPPoE protocol, the remote server can implement Control each access terminal. For example: When the terminal needs to access the public Internet, the terminal accesses the public Internet by sending a PPPoE message carrying the public Internet data, and transmits data according to the PPPoE protocol and the corresponding server in the public Internet.

Further, the Ethernet frame detection is set, and the detection of the PPPoE packet is added in the bridging process. The PPPoE packet includes the PPPoED packet and the PPP session. The PPPoE packet type is detected and the corresponding operation is performed.

Further, when the packet type is the transmission phase packet PPPoED, in combination with the first embodiment of FIG. 1, in the four steps of the PPPoE discovery phase, the Payload in the PPPoE packet always contains a TLV: Host-Uniq. Host-Uniq is the host unique identifier, a random number randomly generated by the dialing host. Host-Uniq is similar to the identifier field in PPP data packets. It is mainly used to match the sender and receiver. Because there are many PPPoE data packets in the broadcast network. Among them, we can use the always-present Host-Uniq as the access identification data to identify the type of access network required by the terminal. If the access account has two, the access identifier data may be set to, the value of one account type corresponding to Host-Uniq is between [0, C), and the other account type corresponds to the value of Host-Uniq. Between the [C, +∞) ranges, where C is a constant constant between (0, +∞), for example: No. Use the Internet dial-up account, ie, the Internet account, that is, the terminal needs to access the public Internet network. Set the value of Host-Uniq between [0, C). If the dial-up uses the IPTV dial-up account, that is, the @iptv account. That is, the terminal needs to access the IPTV private network, and the value of Host-Uniq is set between [C, +∞). When there are multiple access accounts, the access identification data may be set such that one account type corresponds to the value of Host-Uniq between [0, A), and the other account type corresponds to the value of Host-Uniq. Α, Β) Between the ranges, the third account type corresponds to the value of Host-Uniq between [B, C), etc., so that the value of Host-Uniq is set to multiple ranges to correspond to multiple accounts.

5101. If the packet type of the PPPoE packet is PPPoED, obtain an egress network channel that matches the PPPoE packet according to the access identifier data carried by the PPPoED packet.

In a specific embodiment, the PPPoED packet is parsed to obtain the access identifier data carried by the PPPoED, and the access identifier data may be the data of the Host-Uniq indicated by the host in the Payload, and the terminal identifier is determined according to the access identifier data. Dial-up account type, for example: If Host-Uniq is in the [0, C) range, the message is from the Internet dial-up account, then the PPPoED message is mapped to the PVC1 network channel, and the PVC1 network channel access server It is an Internet server. If the Host-Uniq is in the range of [C, +∞), the packet is from the IPTV dial-up, and the PPoED packet is mapped to the PVC2 network channel. The server accessed by the PVC2 network channel is the IPTV server. The PVC1 and the PVC2 are permanent virtual circuits of the PVC. When the PPPoED packet is mapped to the corresponding network channel, the corresponding operation is performed according to the PPPoE protocol. The setting of the access identification data for the PPPoED message includes setting the access identification data for the four processing stages of PADI, PADO, PADR, and PADS, wherein each stage performs a mapping of the network path.

5102. Access the terminal to the network by using the egress network channel.

In a specific embodiment, when the PPPoED packet is mapped to the corresponding network channel according to the access identifier data, the terminal accesses the terminal through the network channel, and the terminal exchanges information with the access server through the network channel.

In a specific embodiment, when the server accessed by the egress network channel is an Internet server, the PPPoED is broadcast to the Internet. When the server accessing the egress network channel is an IPTV server, the PPPoED is broadcasted to the IPTV private network.

Please refer to FIG. 3, which is a flowchart of a second embodiment of a method for network access according to the present invention. As shown in FIG. 3, the steps of a network access method in this embodiment include:

S200: When receiving the PPPoE text sent by the terminal, detecting the type of the PPPoE text, The text type includes a sending phase PPPoED or a session phase PPP, and the PPPoED carries access identification data.

5201. If the packet type of the PPPoE packet is PPPoED, the PPPoED is parsed to obtain the access identifier data carried by the PPPoED, where the access identifier data includes: the host in the PPPoED indicates the host-Uniq data.

In an embodiment, the access identifier data carried by the PPPoED may be the access identifier data carried by the PADI or PADO or the PADR or the PADS, and the identifier data may be marked in the host identifier host-Uniq of the packet.

S202: Determine, according to the access identifier data, a dialing account type of the terminal, where the dialing account type includes: an Internet Internet dialing account type or an interactive network television IPTV dialing account type.

In a specific embodiment, if two dialing accounts are used, for example, the two dialing accounts are an Internet Internet dialing account type and an interactive Internet TV IPTV dialing account type, the PPPoE protocol of the terminal is extended, and the user needs to access the Internet. Dial-up account type, the digital TV terminal system sets the value of Host-Uniq in the PPPoED message between [0, C). When the user needs to access the IPTV dial-up account type, the digital TV terminal system will use the PPPoED message. The value of Host-Uniq is set between [C, +∞), where C is a constant constant between (0, +∞), and the set rule is synchronized to the gateway. At this time, the access identifier is set. When the gateway parses out the access identifier data and obtains the value of Host-Uniq between [0, C), the corresponding setting rule, the gateway obtains the user needs to access the Internet network, when the gateway When the access identification data is parsed and the value of Host-Uniq is between [C, +∞), corresponding to the setting rule, the gateway obtains the user to access the IPTV private network.

5203. Select, according to the dialed account type, an egress network channel that matches the dialed account type.

In a specific embodiment, if it belongs to Internet dialing, the cell is mapped to PVC1, and if it belongs to IPTV dialing, the cell is mapped to PVC2. The server accessing the PVC1 network channel is an Internet server, and the server accessed by the PVC2 network channel is an IPTV server.

S204: Connect the terminal to the network by using the egress network channel.

For the steps S200 and S204, refer to step S100 and step S102 of the embodiment shown in FIG. 2, and details are not described herein.

Please refer to FIG. 4, which is a flowchart of a third embodiment of a method for network access according to the present invention. As shown in Figure 4 The steps of a network access method in this embodiment include:

5300. When receiving the PPPoE file sent by the terminal, detecting, by the terminal, the type of the PPPoE file, where the file type includes a sending phase, a PPPoED, or a session phase, a PPP, where the PPPoED carries the access identifier data.

5301. If the packet type of the PPPoE packet is PPPoED, obtain an egress network channel that matches the PPPoE packet according to the access identifier data carried by the PPPoED.

5302. Broadcast the PPPoED to the network by using the egress network channel.

In a specific embodiment, the PPPoED is broadcast to the matching egress network path, and when the Internet network is matched, the PPPoED is broadcast to the Internet. When the match is for the IPTV private network, the PPPoED is broadcast to the IPTV private network.

S303: Receive a response message returned by at least one server in the network.

In a specific embodiment, the lookup access server sent by the terminal is forwarded through the egress network channel, that is, the PADI frame, and the server in the network responds to the response message returned by the PADI frame, and the response message includes whether the terminal needs to establish a connection.

5304. Select, according to the response message, one server from the at least one server as an access server.

In a specific embodiment, the connection request is sent by the forwarding terminal, that is, the PADR frame is sent to the responding access server, indicating that it is desired to establish a connection with the server with the appropriate conditions.

S305. Access the terminal to the network by using the selected access server.

In a specific embodiment, when receiving a PPPOE connection confirmation sent by the access server, that is, a PADS frame, the terminal accesses the determined access server network.

S306. Record a mapping relationship between the session identifier and the egress network channel according to the session identifier allocated by the access server.

In a specific embodiment, when receiving the PPPoE connection confirmation sent by the access server, the mapping relationship between the session identifier and the egress network channel is recorded according to the session identifier allocated by the access server.

The session identifier includes: a MAC address of the access server and a unique identifier generated by the access server, and the gateway may need to find the destination access server according to any session identifier. The unique identifier generated by the access server is stored in the Session_ID in the PPPoE protocol structure, and the gateway can read the unique identifier generated by the access server in the Session_ID and obtain the destination access. The server; the MAC address of the access server is stored in the last step of the broadcast PPPoED. The source address of the Ethernet frame header of the PADS, the source address of which is the MAC address of the access server, due to the MAC address of the access server. It is unique, that is, the gateway can also find the destination access server according to the MAC address of the access server. Further, the mapping relationship between the session identifier and the egress network channel may be, for example, when the egress network channel of the access is PVC1, the mapping relationship between the session identifier and the PVC1 is recorded, and when the egress network channel is accessed, the PVC2 is , the mapping relationship between the session identifier and PVC2 is recorded. The session identifier will uniquely identify a PPPoE session. The session identifier is used in a PPP session.

For the step S300 and the step S301, reference may be made to the step S100 and the step S101 of the embodiment shown in FIG. 1 , and details are not described herein.

Referring to FIG. 5, it is a flowchart of a fourth embodiment of a method for network access according to the present invention. As shown in FIG. 5, the steps of a network access method in this embodiment include:

5400. When receiving the PPPoE file sent by the terminal, detecting, by the terminal, the type of the PPPoE file, where the file type includes a sending phase, a PPPoED, or a session, a PPP, where the PPPoED carries the access identifier data.

S401: If the packet type of the PPPoE packet is PPP, determine an access server according to the session identifier carried in the PPP, and determine an egress network channel that is mapped to the session identifier.

In a specific embodiment, the current Ethernet frame is determined to be a PPP packet by using the set Ethernet frame detection. The PPP uplink packet is encapsulated into an ATM cell by the protocol stack, and the mapping relationship between the session identifier and the query session identifier in the PPP packet is extracted, and the terminal and the access server that establish the connection relationship are obtained and obtained. Export network channel. When the session identifier is mapped to the PVC1 egress network channel, the ATM cell encapsulated by the PPP uplink packet is mapped to the PVC1 egress network channel. When the session identifier is mapped to the PVC2 egress network channel, The ATM cells encapsulated in the PPP uplink packet are mapped to the PVC2 egress network channel, and the access is queried to the corresponding access server according to the session identifier.

The session identifier may include a unique identifier generated by the access server and a MAC address of the access server. When the read session identifier is a unique identifier generated by the server, the gateway extracts the uplink PPP. The session identifier Session_ID is used to query the mapping relationship between the Session_ID and the PVC, thereby obtaining the terminal and the access server that establish the connection relationship and obtaining the egress network channel. When the read session identifier is the MAC address of the access server, the gateway extracts the destination MAC address of the uplink PPP Ethernet frame header, that is, the MAC address of the access server, and queries the MAC address of the access server. The mapping relationship between the PVCs is obtained, and the terminal and the access server that establish the connection relationship are obtained and the egress network channel is obtained.

S402. Send the PPPoE packet to the access server by using the egress network channel, so that the terminal performs a session with the access server.

In a specific embodiment, an ATM cell is sent to the access server terminal and the access server to perform a PPP session through the egress network channel. Please refer to FIG. 6, which is a flowchart of a fifth embodiment of a method for network access according to the present invention. As shown in FIG. 6, the steps of a network access method in this embodiment include:

5500. Create at least one egress network channel for connecting the terminal to the network.

In a specific embodiment, two PVC connections or more than two PVC connections are created. If two PVC connections are created, the two parameters of the VPI/VCI can be respectively connected to different networks in the ATM, the different The network may be an IPTV line and an Internet line, wherein PVC1 may be an Internet line, and PVC2 may be an IPTV line.

5501. When receiving the PPPoE text sent by the terminal, detecting, by the terminal, the type of the PPPoE file, where the text type includes a sending phase, a PPPoED, or a session phase, a PPP, where the PPPoED carries the access identifier data.

S502: If the packet type of the PPPoE packet is PPPoED, obtain an egress network channel that matches the PPPoE packet according to the access identifier data carried by the PPPoED.

S503. Access the terminal to the network by using the egress network channel.

Step S501, step S502, and step S503, refer to step S100, step S101, and step S102 of the embodiment shown in FIG. 5, and details are not described herein.

A specific implementation of a gateway provided by an embodiment of the present invention is described below.

Please refer to FIG. 7, which is a schematic structural diagram of a first embodiment of a gateway according to the present invention. A gateway according to this embodiment includes:

The detecting unit 100 is configured to: when receiving the PPPoE packet sent by the terminal, detecting a packet type of the PPPoE packet, where the packet type includes a PPPOED packet or a session phase packet PPP, where the PPPoED carries Access identification data.

In a specific embodiment, the gateway port is set to be in the bridge mode, and the PPPoE packet is transparently transmitted. Among them, PPPoE (Point to Point Protocol over Ethernet, Ethernet-based peer-to-peer ten-party negotiation) can make The terminal is connected to a remote access server through a single bridge device. Through the PPPoE protocol, the remote server can control each access terminal. For example: When the terminal needs to access the public Internet, the terminal accesses the public Internet by sending a PPPoE message carrying the public Internet data, and transmits data according to the PPPoE protocol and the corresponding server in the public Internet.

Further, when the packet type is the transmission phase packet PPPoED, in combination with the first embodiment of FIG. 1, in the four steps of the PPPoE discovery phase, the Payload in the PPPoE packet always contains a TLV: Host-Uniq. Host-Uniq is the host unique identifier, a random number randomly generated by the dialing host. Host-Uniq is similar to the identifier field in PPP data packets. It is mainly used to match the sender and receiver. Because there are many PPPoE data packets in the broadcast network. Among them, we can use this always-present Host-Uniq as the access identification data to identify the type of access network required by the terminal. If the access account has two, the access identifier data may be set to, the value of one account type corresponding to Host-Uniq is between [0, C), and the other account type corresponds to the value of Host-Uniq. Between the [C, +∞) range, where C is a constant constant between (0, +∞), for example: If the dial-up uses an Internet dial-up account, ie, an Internet account, that is, the terminal needs to access the public Internet network. , set the value of Host-Uniq between [0, C). If the dial-up uses the IPTV dial-up account, that is, the @iptv account, that is, the terminal needs to access the IPTV private network, set the value of Host-Uniq at [C, +∞) between the ranges. When there are multiple access accounts, the access identification data may be set such that one account type corresponds to the value of Host-Uniq between [0, A), and the other account type corresponds to the value of Host-Uniq. Α, Β) Between the ranges, the third account type corresponds to the value of Host-Uniq between [B, C), etc., so that the value of Host-Uniq is set to multiple ranges to correspond to multiple accounts.

The matching unit 200 is configured to obtain, according to the access identifier data carried by the PPPoED, an egress network channel that matches the PPPoE packet, if the packet type of the PPPoE packet is PPPoED.

In a specific embodiment, the PPPoED packet is parsed to obtain the access identifier data carried by the PPPoED, and the access identifier data may be the data of the Host-Uniq indicated by the host in the Payload, and the terminal identifier is determined according to the access identifier data. Dial-up account type, for example: If Host-Uniq is in the [0, C) range, the message is from the Internet dial-up account, then the PPPoED message is mapped to the PVC1 network channel, and the PVC1 network channel access server It is an Internet server. If Host-Uniq Between the [C, +∞) range, the packet is from the IPTV dial-up, and the PPPoED packet is mapped to the PVC2 network channel, and the server accessed by the PVC2 network channel is the IPTV server. The PVC1 and the PVC2 are permanent virtual circuits of the PVC. When the PPPoED packet is mapped to the corresponding network channel, the corresponding operation is performed according to the PPPoE protocol. The setting of the access identification data for the PPPoED message includes setting the access identification data for the four processing stages of PADI, PADO, PADR, and PADS, wherein each stage performs a mapping of the network path.

The access unit 300 is configured to access the terminal to the network by using the egress network channel.

Please refer to FIG. 8, which is a schematic structural diagram of a second embodiment of a gateway according to the present invention. A gateway according to this embodiment includes:

The detecting unit 100, the matching unit 200, and the access unit 300.

The matching unit 200 may further include:

The parsing sub-unit 101 is configured to parse the PPPoED, and obtain the access identifier data carried by the PPPoED, where the access identifier data includes: the host in the PPPoED indicates host-Uniq data.

The determining subunit 102 is configured to determine, according to the access identification data, a dialing account type of the terminal, where the dialing account type includes: an Internet Internet dialing account type or an interactive network television IPTV dialing account type.

In a specific embodiment, if two dialing accounts are used, for example, the two dialing accounts are an Internet Internet dialing account type and an interactive network television IPTV dialing account type, the PPPoE protocol of the digital television terminal is extended, when the user needs to access Internet Internet dialing account type, the digital TV terminal system sets the value of Host-Uniq in the PPPoED message between [0, C). When the user needs to access the IPTV dialing account type, the digital TV terminal system will report PPPoED. Host-Uniq The value is set between the [C, +∞) range, where C is a constant constant between (0, +∞), and the set rule is synchronized to the gateway. At this time, the access identifier is set. When the gateway parses out the access identification data and obtains the value of Host-Uniq between [0, C), the corresponding setting rule, the gateway obtains the user needs to access the Internet network, when the gateway When the access identification data is parsed and the value of Host-Uniq is between [C, +∞), corresponding to the setting rule, the gateway obtains the user to access the television interactive network.

The first selection sub-unit 103 is configured to select, according to the dialed account type, an egress network channel that matches the dialed account type.

Please refer to FIG. 9, which is a schematic structural diagram of a third embodiment of a gateway according to the present invention. A gateway according to this embodiment includes:

The detecting unit 100, the matching unit 200, and the access unit 300.

The access unit 300 may further include:

The broadcast subunit 201 is configured to broadcast the PPPoED to the network through the egress network channel. In a specific embodiment, the PPPoED is broadcast to the matching egress network path, and when the Internet network is matched, the PPPoED is broadcast to the Internet. When the match is for the IPTV private network, the PPPoED is broadcast to the IPTV private network.

The receiving subunit 202 is configured to receive a response message returned by at least one server in the network. In a specific embodiment, the lookup access server sent by the terminal is forwarded through the egress network channel, that is, the PADI frame, and the server in the network responds to the response message returned by the PADI frame, and the response message includes whether the terminal needs to establish a connection.

The second selection sub-unit 203 is configured to select one server from the at least one server as the access server according to the response message.

The access subunit 204 is configured to access the terminal to the network by using the selected access server.

In a specific embodiment, when receiving a PPPOE connection confirmation sent by the access server, that is, a PADS frame, the terminal is connected to the determined access server network. The recording sub-unit 205 is configured to record, according to the session identifier allocated by the access server, a mapping relationship between the session identifier and the egress network channel.

The session identifier includes: a MAC address of the access server and a unique identification code generated by the access server, and the gateway may find the destination access server according to any of the session identifiers. The unique identifier generated by the access server is stored in the Session_ID in the PPPOE protocol structure, and the gateway can read the unique identifier generated by the access server in the Session_ID to obtain the destination access server; the MAC address of the access server is stored in The last address in the PPPoED broadcasts the source address of the Ethernet frame header of the PADS. The source address is the MAC address of the access server. Since the MAC address of the access server is unique, the gateway can also be based on the access server. The MAC address is used to find the destination access server. Further, the mapping relationship between the session identifier and the egress network channel may be, for example, when the egress network channel of the access is PVC1, the mapping relationship between the session identifier and the PVC1 is recorded, and when the egress network channel is accessed, the PVC2 is , the mapping relationship between the session identifier and PVC2 is recorded. The session identifier will uniquely identify a PPPOE session. The session identifier is used in a PPP session.

Please refer to FIG. 10, which is a schematic structural diagram of a fourth embodiment of a gateway according to the present invention. A gateway according to this embodiment includes:

The detecting unit 100, wherein the gateway further includes:

The determining unit 400 is configured to: when the packet type of the PPPoE packet is PPP, determine an access server according to the session identifier carried by the PPP, and determine an egress network channel that is mapped to the session identifier.

In a specific embodiment, the current Ethernet frame is determined to be a PPP packet by using the set Ethernet frame detection. The PPP uplink packet is encapsulated into an ATM cell by protocol stack conversion, and the session identifier in the PPP packet and the mapping relationship between the query session identifier and the egress network path are extracted, thereby obtaining an egress network channel and an access server. When the session identifier is mapped to the PVC1 egress network channel, the ATM cell encapsulated by the PPP uplink packet is mapped to the PVC1 egress network channel. When the session identifier is mapped to the PVC2 egress network channel, the PPP is mapped. The ATM cell encapsulated in the uplink packet is mapped to the PVC2 egress network channel, and accesses the corresponding access server according to the session identifier.

The session identifier may include a unique identifier generated by the access server or an access server. The MAC address, when the read session identifier is a unique identifier generated by the server, the gateway extracts the session identifier Session_ID of the uplink PPP packet, and queries the mapping relationship between the Session_ID and the PVC, thereby obtaining the terminal and the access establishing the connection relationship. The server gets the exit network channel. When the read session identifier is the MAC address of the access server, the source address of the Ethernet frame header of the last step PADS in the broadcast PPPoED is read, and the mapping relationship between the MAC address of the access server and the PVC is obtained, thereby obtaining Establish a connection terminal and an access server and obtain an exit network channel.

The sending unit 500 is configured to send, by using the egress network channel, the PPPoE message to the access server, so that the terminal performs a session with the access server.

In a specific embodiment, an ATM cell is sent to the access server terminal and the access server to perform a PPP session through the egress network channel.

Please refer to FIG. 11, which is a schematic structural diagram of a fifth embodiment of a gateway according to the present invention. A gateway according to this embodiment includes:

The detecting unit 100, the matching unit 200, the access unit 300, the determining unit 400, and the transmitting unit 500. The gateway further includes:

The creating unit 600 is configured to create at least one egress network channel for connecting the terminal to the network. In a specific embodiment, two PVC connections or more than two PVC connections are created. If two PVC connections are created, the two parameters of the VPI/VCI can be respectively connected to different networks in the ATM, the different The network may be an IPTV line and an Internet line, wherein PVC1 may be an Internet line, and PVC2 may be an IPTV line.

Referring to FIG. 12, it is a schematic structural diagram of a first embodiment of a network access system according to the present invention. A network access system according to this embodiment includes:

Terminal 1, Gateway 2 and Server 3.

In a specific embodiment, the terminal 1 can automatically switch between multiple networks according to the type of service that is running. For example, when the terminal 1 is powered on, the terminal 1 uses the Internet account to dial the connection network by default. After the IPTV application is started, the terminal 1 disconnects the current Internet dial-up connection and initiates the iTV private network dialing, so that the user can use the IPTV dedicated channel to use the IPTV service. When the user exits the IPTV application, the terminal 1 will Disconnect the IPTV private network dial-up connection and restore the Internet dial-up connection.

The gateway 2 is as described in the gateways shown in Figures 6-9.

The server 3 is connected to the PVC egress network channel, and the PVC is not less than one. The following embodiments describe a system for network access.

The terminal 1 sets the corresponding PPPoE packet according to the user's selection. When the user selects to access the Internet network, the terminal 1 sets the value of the host-Uniq value of the access identifier data in the PPPoE packet to be in [0, C). Between the ranges, when the user selects to access the IPTV private network, the terminal 1 sets the value of the host-Uniq value of the access identification data in the PPPoE message to be in the range of [C, +∞). The terminal sends the packet to the gateway, and the gateway receives the packet and detects the packet type of the PPPoE packet. When the packet type of the PPPoE packet is PPPoED, the terminal searches for the packet according to the PPPoED. The value of the data host-Uniq obtains an egress network channel that matches the PPPoE packet, that is, when the value of Host-Uniq is between [0, C), the matching egress network channel may be an access to the Internet network. PVC1, when the value of Host-Uniq is between [C, +∞), the matching egress network channel can be PVC2 accessing the IPTV private network, and then the gateway sends the encapsulated ATM cell through the matching network. The PPPoE packet exchanges data with the accessed server 3, wherein the access server may access the server according to the session identifier assigned by the access server, for example: when the read session identifier is a unique identifier generated by the server. When the code is used, the gateway extracts the session identifier SessionJD of the uplink PPP packet, and searches for the mapping relationship between the Session_ID and the PVC, thereby obtaining the terminal and the access service for establishing the connection relationship. And obtain the egress network channel; or when the read session identifier is the MAC address of the access server, the gateway extracts the destination MAC address of the uplink PPP Ethernet frame header, that is, accesses the MAC address of the server, and Query the mapping between the MAC address of the access server and the PVC, and obtain the terminal and access server that establish the connection relationship and obtain the egress network channel. Further, the data exchange may be, by using the egress network channel, to broadcast an ATM cell to the network, and receive a response message returned by the plurality of servers 3 in the network, according to the response message, from the server 3 that returns the response message. A server 3 is selected as the access server 3, and the terminal 1 is connected to the selected server 3 through the selected access server 3, so that the server 3 obtains the data content of the terminal 1 data content or the terminal content obtaining server 3.

Through the description of the above embodiments, the present invention has the following advantages:

In the embodiment of the present invention, in the existing digital television terminal and the home media gateway hardware architecture, the PPPoED packet in the transmission phase carries the access capable of discriminating the network type by extending the PPPoED packet in the PPPoE packet. Identifying the data and enabling the digital television terminal to access the corresponding egress network channel by parsing the access identification data. This enables digital TV terminals to support access to multiple networks, allowing existing digital TV terminals to be upgraded only through software for digital TV terminals and gateways. Access to multiple network types allows users to access multiple network types without replacing single-port digital TV terminals. This not only saves hardware costs, user cost, but also saves network maintenance costs.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes made by the claims of the present invention are still within the scope of the present invention.

Claims

Rights request

1. A method of network access, characterized in that the method includes:

When receiving the PPPoE message sent by the terminal, the message type of the PPPoE message is detected. The message type includes sending a P-segment message PPPoED or a session P-segment message PPP, and the PPPoED carries an access identifier. data;

If the message type of the PPPoE message is PPPoED, the egress network channel matching the PPPoE message is obtained according to the access identification data carried by the PPPoED;

The terminal is connected to the network through the egress network channel.

2. The method of claim 1, wherein obtaining the egress network channel matching the PPPoE message based on the access identification data carried by the PPPoED includes:

Parse the PPPoED to obtain the access identification data carried by the PPPoED. The access identification data includes: the host identification host-Uniq data in the PPPoED;

According to the access identification data, the dial-up account type of the terminal is determined, and the dial-up account type selects an egress network channel that matches the dial-up account type based on the dial-up account type.

3. The method of claim 1, wherein said connecting the terminal to the network through the egress network channel includes:

Broadcast the PPPoED to the network through the egress network channel;

Receive a response message returned by at least one server in the network;

According to the response message, select one server from the at least one server as the access server;

The terminal is accessed to the network through the selected access server.

4. The method according to claim 3, characterized in that, after connecting the terminal to the network through the selected access server, it further includes: Record the mapping relationship between the session identifier and the egress network channel according to the session identifier assigned by the access server;

The session identifier includes: the MAC address of the access server or a unique identification code generated by the access server.

5. The method of claim 1, further comprising:

If the message type of the PPPoE message is PPP, determine the access server based on the session identifier carried by PPP, and determine the egress network channel mapped to the session identifier;

The PPPoE message is sent to the access server through the egress network channel, so that the terminal has a session with the access server.

6. The method of claim 6, wherein when receiving the PPPoE message sent by the terminal, before detecting the message type of the PPPoE message, the method further includes:

Create at least one egress network channel for connecting the terminal to the network.

7. A gateway, characterized in that the gateway includes:

The detection unit is configured to detect the message type of the PPPoE message when receiving the PPPoE message sent by the terminal. The message type includes the transmission phase message PPPoED or the session phase message PPP, and the PPPoED carries the Enter identification data;

Matching unit, used to if the message type of the PPPoE message is PPPoED, then according to the

The access identification data carried by PPPoED obtains an egress network channel that matches the PPPoE message; an access unit is configured to access the terminal to the network through the egress network channel.

8. The gateway according to claim 7, wherein the matching unit includes: a parsing subunit, configured to parse the PPPoED and obtain the access identification data carried by the PPPoED, and the access identification data includes : The host in PPPoED indicates host-Uniq data;

The first determination subunit is used to determine the dial-up account type of the terminal according to the access identification data. The dial-up account type includes: Internet dial-up account type or interactive network television IPTV dial-up account type; The first selection subunit is used to select an egress network channel that matches the dial-up account type according to the dial-up account type.

9. The gateway according to claim 7, characterized in that the access unit includes: a broadcast subunit, used to broadcast the PPPoED to the network through the egress network channel; a receiving subunit, used to receive all a response message returned by at least one server in the network; a second selection subunit, configured to select one server from the at least one server as the access server according to the response message;

The access subunit is configured to access the terminal to the network through the selected access server.

10. The gateway according to claim 9, wherein the access unit further includes: a recording subunit, configured to record the session identifier and the session identifier according to the session identifier assigned by the access server. Mapping relationship of egress network channels;

The session identifier includes: the MAC address of the access server; or a unique identification code generated by the access server.

11. The gateway according to claim 7, characterized in that, the gateway further includes:

A determining unit configured to determine the access server based on the session identifier carried by PPP when the message type of the PPPoE message is PPP, and determine the egress network channel mapped to the session identifier;

A sending unit, configured to send the PPPoE message to the access server through the egress network channel, so that the terminal can conduct a session with the access server.

12. The gateway according to claim 11, wherein the access gateway further includes: a creation unit, configured to create at least one egress network channel for connecting the terminal to the network.

13. A network access system, characterized in that the system includes: a terminal and a server, and a gateway as claimed in claims 7-12.