WO2012016531A1 - 一种接入网设备的入网方法及系统 - Google Patents
一种接入网设备的入网方法及系统 Download PDFInfo
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- WO2012016531A1 WO2012016531A1 PCT/CN2011/077991 CN2011077991W WO2012016531A1 WO 2012016531 A1 WO2012016531 A1 WO 2012016531A1 CN 2011077991 W CN2011077991 W CN 2011077991W WO 2012016531 A1 WO2012016531 A1 WO 2012016531A1
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- protocol packet
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/14—Routing performance; Theoretical aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
Definitions
- the present invention relates to the technical field of a novel network, and in particular, to a network access method for an access network device, a network access system for an access network device, a node server, and an access switch.
- Background technique
- New networks including the Internet, enable the exchange of information and other information resources between different individuals and institutions.
- Networks typically include technologies such as path, transport, signaling, and network management. These techniques have been widely found in various literatures. The general introduction to this is:
- Path technologies connecting terminals to a wide-area transport network have evolved from 14.4, 28.8 and 56K modems to include ISDN, Tl, cable modem, DSL, Ethernet and wireless Connected technology.
- Synchronous Optical Network SONET
- DWDM Closed Wavelength Division Multiplexing
- ATM Asynchronous Transfer Mode
- RPR Resilient Packet Ring
- IP Internet Protocol
- IP-based network such as the Internet
- voice such as telephony
- video and data networks will be inevitable.
- IP-based trains that integrate all types of networks have already left the station, and some passengers are extremely enthusiastic about the trip. Others are reluctantly dragged, crying, calling, kicking and enumerating IP. Defects. But no matter what its flaws, IP has been adopted as an industry standard, and no other technology except it has such great potential and room for development. , (taken from
- TCP/IP Transmission Control Protocol/Internet Protocol
- ARPANET ARPANET
- Application layer - Application layer is a general term for all applications that users are targeting.
- the TCP/IP protocol family has multiple protocols at this level to support different applications, and many of the familiar Internet-based applications are inseparable from these protocols.
- WWW World Wide Web
- FTP File Transfer Protocol
- SMTP file transfer protocol
- DNS domain name resolution
- Telnet protocol remote login, etc.
- the function of the transport layer one layer is mainly to provide communication between applications.
- the TCP/IP protocol family has TCP and UDP protocols at this layer.
- Network layer 1 is a very important layer in the TCP/IP protocol family. It mainly defines the IP address format, so that data of different application types can be smoothly transmitted on the Internet.
- the IP protocol is a network layer protocol.
- Network interface layer This is the lowest layer of TCP / IP software, responsible for receiving IP packets And send it through the network, or receive physical frames from the network, extract IP datagrams, and hand them over to the IP layer.
- IP IP-to-Network Interface
- the main reason for their incompatibility is because of the basic unit of data they transmit (technically called "frames").
- the format is different.
- the IP protocol is actually a set of protocol software consisting of software programs that convert all kinds of different "frames" into an "IP packet” format. This conversion is one of the most important features of the Internet, making all kinds of computers Interoperability can be achieved on the Internet, which is characterized by "openness.”
- a packet is also a form of packet switching, which means that the transmitted data is segmented into “packets” and then transmitted. However, it belongs to the “connectionless type", and each "package” (grouping) that is marked is transmitted as an "independent message”, so it is called “data packet”. In this way, it is not necessary to connect a circuit before starting communication, and each data packet does not have to be transmitted through the same path, so it is called “connectionless type”. This feature is very important, in the case of text messaging, it greatly enhances the robustness and security of the network.
- Each packet has two parts: a header and a message.
- the header has a necessary content such as a destination address, so that each packet can accurately reach the destination without going through the same path. Recombination at the destination is restored to the originally sent data. This requires IP to have the function of packet packing and assembly.
- the data packet can also change the length of the data packet according to the packet size specified by the network.
- the maximum length of the IP data packet can reach 65535 bytes.
- QoS Quality of Service
- the network transmission quality is specifically represented by packet loss and bit error.
- Computer files are not sensitive to errors in transmission. Even if most of the data packets are lost during transmission, as long as there is a TCP retransmission mechanism, the computer will still consider the network available. However, if the packet loss and bit error rate are higher than one thousandth, the video quality will be degraded for synchronous video.
- the empirical data tells us that high-quality video communication even requires less than one in 100,000 lost packets and errors.
- the test data of the current network environment shows that most of the packet loss occurs inside the router, and the error generated in the fiber transmission is almost negligible.
- “Inte Serv” is built on the basis of independent stream resource reservation, using Resource Reservation Setup Protocol (RSVP).
- RSVP Resource Reservation Setup Protocol
- RSVP 2Mbps bandwidth can only be macroscopically. If the 1 second data set is sent in the first half of the second, it will cause problems and form periodic burst traffic. Because the core idea of the IP Internet is to do its best, at every network node, the switch always tries to forward data as fast as possible. When a video is circulated through a multi-level switch, the traffic distribution will inevitably become uneven. Multiple non-uniform non-synchronous flows together will result in greater non-uniformity over time, that is, network traffic must be periodically blocked. As the number of video users increases, there is no upper limit for periodic blocking. When the internal storage capacity of the switch exceeds the value of the switch, the result of packet loss is directly caused.
- Diff Serv tries to provide a better than best-effort network service. This method does not require complex network-wide resource reservation, and the implementation is very simple. Just put “priority, mark, network switch in each packet first. Handling video data with "priority,” the basic principle is that banks can issue gold cards to VIP customers, which can effectively reduce the queue time of high-end customers. This method sounds good, but it still doesn't work.
- HDTV quality video content can be transmitted.
- most of today's web servers use Gigabit Ethernet ports, and their instantaneous traffic is dozens of times that of HDTV. If there are many similar websites that happen to collide together, the burst traffic generated in a short period of time will exceed the usage of the entire network. HDTV is required to be able to fill any lenient network. Statistical analysis shows that this type of collision is very frequent.
- the IP Internet attempts to use storage to absorb transient traffic, with the result that transmission delays are increased. Due to limited storage capacity, there is no upper limit for bursty traffic. Therefore, the storage method can only improve the chance of packet loss of this device, and the burst traffic absorbed by this node will put more pressure on the next node. Video traffic continues to flow, and the storage mode of the switch intensifies the convergence of bursts to weak nodes, and network packet loss is inevitable.
- the technical problem to be solved by the embodiments of the present invention is to provide a network access method for an access network device, which is used to ensure a stable transmission rate of data packet transmission and avoid delay, thereby ensuring network transmission quality.
- the embodiment of the invention further provides a network access system of the access network device, a node server and an access switch, which are used to ensure the implementation and application of the above method in practice.
- a network access method of an access network device which includes the following steps: The access switch is powered on, and all downlink protocol packets are directed to the CPU module in the internal downlink protocol packet address table;
- the access switch Receiving, by the access switch, a downlink protocol packet sent by the node server, and according to the setting of the downlink protocol packet address table, directing the downlink protocol packet to a CPU module of the access switch, where the CPU module generates an uplink protocol packet, and Sending to the node server;
- the downlink protocol packet includes an access network address to be allocated;
- the node server sends an access network command to the access switch, where the access network command includes an access network address of the access switch, where the access network address is the to-be-allocated access in the downlink protocol packet received by the access switch.
- the access switch updates its internal downlink protocol packet address table so that only the protocol packet whose destination address is its own access network address is directed to the CPU module.
- the access switch enters the network.
- the "net” entered refers to a novel network.
- This new type of network is a centralized control network structure.
- the network can be a tree network, a star network, a ring network, etc., but on this basis, a centralized control node is needed in the network to control the entire network.
- the new network is divided into two parts: the access network and the metropolitan area network.
- the devices in the access network can be mainly divided into three categories: node servers, access switches, and terminals (including various set-top boxes, code boards, memories, etc.).
- the node server is a node in the access network that functions as a centralized control, and can control the access switch and the terminal.
- the node server can be directly connected to the access switch or directly connected to the terminal.
- the devices in the metropolitan area network can also be divided into three categories: metropolitan area servers, node switches, and node servers.
- the node server is the node server of the access network part, that is, the node server belongs to both the access network part and the metropolitan area network part.
- the metropolitan area server is a node that functions as a centralized control function in the metropolitan area network, and can control the node switch and the node server.
- the metro server can be directly connected to the node switch or directly to the node server. It can be seen that the whole new network is a layered and centralized control network structure, and the network controlled by the node server and the metropolitan area server can be various structures such as a tree type, a star type, and a ring type.
- the access switch is also connected to other subordinate access network devices.
- the node server sends a port allocation packet to the access switch that has entered the network. That is, as a preferred embodiment of the present invention, when the access switch that has entered the network receives the port allocation packet sent by the node server, the method further includes the following steps:
- the access switch that has entered the network directs the port allocation packet whose destination address is its own access network address to the CPU module.
- the downlink port directed by each port downlink protocol packet is set.
- the method further includes the following steps:
- the access switch directs the port downlink protocol packet to the corresponding downlink port according to the setting of the internal downlink protocol packet address table; the port downlink protocol packet includes an access network address to be allocated;
- the node server receives the port uplink protocol packet sent by the lower-level access network device connected to the downlink port of the access switch, sending a network access command to the lower-level access network device, where the network access command includes the lower-level connection
- the access network address of the network access device where the access network address is the access network address to be allocated in the port downlink protocol packet received by the lower-level access network device.
- the subordinate access network device may include an access switch or a terminal.
- the access switch updates its internal downlink protocol packet address table according to the network access command, and sets a protocol packet whose destination address is its own access network address to the CPU module. It also sends an incoming network command response to the node server.
- the terminal When the lower-level access network device is a terminal, the terminal sends a network access command response to the node server.
- the node server When the node server receives the network access command response sent by the access switch, it knows that the access switch has entered the network, and then periodically sends a state downlink protocol packet to the access switch, that is, as a preferred embodiment of the present invention.
- the access switch that has entered the network receives the state downlink protocol packet that is sent by the node server, the method further includes the following steps: The access switch that has been connected to the network directs the downlink protocol packet whose destination address is its own access network address to the CPU module according to the setting of its internal downlink protocol packet address table.
- the CPU module generates a status uplink protocol packet and sends it to the node server.
- the node server For a lower-level access network device connected to an access switch, the node server also periodically sends a state downlink protocol packet to the lower-level access network device, that is, as a preferred embodiment of the present invention, when When the access switch receives the status downlink protocol packet sent by the node server, the method further includes the following steps:
- the access switch that has entered the network, according to the setting of the internal downlink protocol packet address table, directs the state downlink protocol packet whose destination address is the access network address of the lower-level access network device to the corresponding port; the state downlink protocol packet is The port is transmitted to the corresponding subordinate access network device;
- the subordinate access network device generates a status uplink protocol packet for the received state downlink protocol packet, and sends the packet to the node server.
- the access switch may also be configured with an uplink protocol packet address table.
- the method further includes the following steps:
- the access switch may further set a data packet address table.
- the method further includes the following steps:
- the embodiment of the present invention may further include a process in which the node server accesses the network. After the node server is powered on, the registration information of the lower-level access network device is imported to the CPU, the metropolitan area network address is obtained, and the own access network address is configured.
- the process of connecting the node server to the network may include the following steps:
- the node server enters a metropolitan area network, where the metropolitan area network is a network with centralized control functions, including a metropolitan area server, a node switch, and a node server, where the node exchanges
- the machine is connected between the metropolitan area server and the node server; and the step of the node server entering the metropolitan area network includes:
- the metropolitan area network device is connected to the metropolitan area network, and the metropolitan area server having the centralized control function in the metropolitan area network allocates a protocol label and a metropolitan area network address to the networked device;
- the metropolitan area network device includes a node switch and a node server, and the protocol label is used to describe a connection between the metropolitan area network device and the metropolitan area server; when there is more between the same metropolitan area network device and the metropolitan area server When connecting, the metropolitan area server assigns different protocol labels to each connection;
- the metropolitan area server For each service request across the metropolitan area network, the metropolitan area server assigns a data tag for the corresponding service, the data tag being used to describe the connection between the node servers involved in the service.
- the label is divided into an inbound label and an outgoing label, and the inbound label refers to a label of the data packet entering the metropolitan area server or the node switch, and the outgoing label refers to the label of the data packet leaving the metropolitan area server or the node switch;
- the inbound and outbound tags of the same packet are different tags or the same tag. More specifically, the metropolitan area network device accesses the metropolitan area network, and the steps of assigning the protocol label and the metropolitan area network address by the metropolitan area server include the following substeps:
- the metropolitan area server sends a metropolitan area query tag packet to all its downlink ports, and each metropolitan area query tag packet contains a to-be-used protocol tag assigned by the metropolitan area server;
- the node server After the node server is powered on, it receives the metropolitan area query label packet sent by the metropolitan area server, and then returns the metropolitan area response label packet to the metropolitan area server, where the metropolitan area response label packet includes the serial number of the metropolitan area network device and is received.
- the port number of the metropolitan area query tag package
- the metropolitan area server After receiving the metropolitan area response label packet, the metropolitan area server verifies whether the metropolitan area network device is registered according to the serial number in the packet. If it is already registered, it sends a network access command to the port of the metropolitan area network device that receives the metropolitan area query label packet.
- the network entry command includes a metropolitan area network address allocated by the metropolitan area server for the metropolitan area network device and the inactive protocol label;
- the node server accesses the network into the metropolitan area network in the manner of an IP node, that is, the metropolitan area network is an IP network structure.
- IP node that is, the metropolitan area network is an IP network structure.
- the embodiment of the present invention may further include the following steps: the node server sets, in its internal downlink protocol packet address table, a downlink port that is respectively directed by each downlink protocol packet;
- the node server sends a downlink protocol packet through the corresponding downlink port according to the setting of the downlink protocol packet address table.
- the embodiment of the present invention may further include the following steps:
- the node server generates a port allocation package including port allocation information
- the node server sends a port allocation packet through the corresponding downstream port according to the setting of its internal downlink protocol packet address table.
- the node server is further provided with an address information table, and the address information table records address occupation information, device identification information, and device resource information.
- the operation for the address information table may include the following:
- the write device resource information is the port information of the current node server.
- the address information table is updated according to the setting of the downlink port that is directed by each downlink protocol packet in the internal downlink protocol packet address table of the node server, and the update operation includes:
- the address of the access network to be allocated in each downlink protocol packet is respectively written in the blank entry of the address information table, and the address occupation information is marked as the address to be used.
- Scenario 3 Update the address information table according to the setting of the downlink port of the other access device that is directed by the port downlink protocol packet, where the update operation includes: The address of the to-be-assigned access network in each port downlink protocol packet is respectively written in the blank entry of the address information table, and the address occupation information is marked as the address to be used.
- the device resource information is updated to be the port information of the current access switch, and the access network address information of the access network device to which the port is connected.
- Scenario 5 When the node server receives the network access command response sent by the terminal, updating the address information table, where the update operation includes:
- the device resource information is updated to be the port information of the current terminal, and the access network address information of the access network device to which the port is connected.
- Scenario 6 If the node server does not receive the status uplink protocol packet sent by the access switch within a preset time, it stops sending the status downlink protocol packet to the access switch, and updates the address information table;
- the update operations include:
- Scenario VII If the node server does not receive the state uplink protocol packet sent by the lower-level access network device within a preset time, stop sending the state downlink protocol packet to the lower-level access network device, and update the address information.
- Table; the update operation includes:
- the address information table of the node server may further include uplink and downlink traffic information of the current access network device port, in order to facilitate the control and management of the communication path of the lower-level access network device and the data transmission.
- the node server may further be provided with an uplink protocol packet address table, and the method further includes the following steps:
- the node server When the node server is powered on, it is set in its internal uplink protocol packet address table, and all uplink protocol packets are directed to the CPU module.
- the node server may further be configured with a data packet address table, and the method further includes the following steps:
- the direction of all packets is set to be turned off in its internal packet address table.
- the node server For a subordinate access network device that requests access, the node server usually first determines whether it is legal, and sends a network access command to it when it is legal.
- the method further includes The following steps:
- the CPU module of the node server determines whether the registration information of the access switch exists according to the network access command response packet, and if yes, determines that the access switch is legal; otherwise, it determines that the access switch is invalid;
- the CPU module of the node server determines whether the registration information of the access network device exists according to the network access command response packet, and if yes, determines that the access network device is legal; otherwise, determines that the access network device is invalid;
- the registration information may include a device type and a device identification.
- the embodiment of the invention further includes a node server, which includes the following modules:
- a downlink protocol packet sending module configured to send a downlink protocol packet to the access switch, where the downlink protocol packet includes an access network address to be allocated;
- An uplink protocol packet receiving module configured to receive an uplink protocol packet that the access switch replies to the downlink protocol packet;
- a first network access command sending module configured to send an access network command to the corresponding access switch according to the received uplink protocol packet, where the network access command includes an access network address allocated to the access switch, where the access network The address is the address of the access network to be allocated in the downlink protocol packet received by the access switch.
- the node server may further include the following modules:
- a port allocation packet sending module configured to send a port allocation packet to the access switch that has entered the network, where the port allocation packet includes port allocation information, and the port allocation information is that each port downlink protocol packet is directed to each downlink of the access switch. Port information.
- the node server may further include the following modules: a port downlink protocol packet sending module, configured to send a port downlink protocol packet to the access switch that has entered the network; and the port downlink protocol packet includes a to-be-allocated The access network address of the port; the port uplink protocol packet receiving module, configured to receive a port uplink protocol packet sent by a lower-level access network device connected to a downlink port of the access switch;
- a second network access command sending module configured to send a network access command to the lower-level access network device, where the network access command includes an access network address of the lower-level access network device, where the access network address is the lower-level access The access network address to be allocated in the port downlink protocol packet received by the network device.
- the node server may further include:
- the network access response receiving module is configured to receive an incoming network command response sent by the lower-level access network device.
- the subordinate access network device may include an access switch or a terminal.
- the node server further includes the following modules:
- a status downlink protocol packet sending module configured to periodically send a status downlink protocol packet to an access switch that has entered the network;
- the first receiving module of the status uplink protocol packet is configured to receive a status uplink protocol packet that is replied by the access switch for the status downlink protocol packet.
- the node server further includes the following modules:
- the second uplink receiving module of the state uplink protocol packet is configured to receive a state uplink protocol packet that is sent by the lower-level access network device for the downlink protocol packet in the state.
- the node server further includes the following modules:
- the initialization module is configured to import the registration information of the lower-level access network device to the CPU after power-on, obtain the metropolitan area network address, and configure its own access network address.
- the node server may further include the following modules:
- a protocol label and an address obtaining module configured to obtain an allocated protocol label and a metropolitan area network address from the metropolitan area server after accessing the metropolitan area network, where the protocol label is used to describe a connection between the node server and the metropolitan area server;
- the upper-level connection device includes a node switch and a metropolitan area server;
- the metropolitan area network is a network with centralized control functions.
- the utility model includes a metropolitan area server, a node switch, and a node server, wherein the node switch is connected between the metropolitan area server and the node server;
- a data label obtaining module configured to obtain, for each service request across the metropolitan area network, a data label of the allocated service to the secondary service from the metropolitan area server, where the data label is used to describe a connection between the node servers involved in the service ;
- a label adding module configured to send a protocol packet or a data packet to a protocol packet or a data packet sent by the node server to the metropolitan area network;
- a label deletion module is configured to remove a corresponding protocol label or data label from a protocol packet or a data packet received from the metropolitan area network.
- the label is divided into an inbound label and an outgoing label, and the inbound label refers to a label of the data packet entering the metropolitan area server or the node switch, and the outgoing label refers to the label of the data packet leaving the metropolitan area server or the node switch;
- the inbound label and the outgoing label of the same data packet are different labels, or are the same label; the label includes a protocol label and a data label. More preferably, the node server may further include:
- An address-to-label mapping table configured to record, for each service across the metropolitan area network, a binding relationship between an access network address and an outgoing label of two terminals across the metropolitan area network; wherein, the access network address is each node The address assigned by the server to the networked device connected to it;
- the label adding module searches the outbound label corresponding to the protocol packet or the data packet sent by the node server to the metropolitan area network according to the address-tag mapping table, and adds the found outbound label to be sent.
- the node server may further include:
- the protocol package label table is configured to set all the metropolitan area protocol packets to the CPU module when the node server is powered on, and the metropolitan area protocol package includes the metropolitan area query label package and the metropolitan area service application package sent by the metropolitan area server.
- the node server may further include the following modules:
- the response packet label table is used to direct the metropolitan area response label packet to the corresponding uplink port;
- the response packet label table initialization module is configured to set the direction of all the urban response label packets to be closed when the node server is powered on;
- the response packet label table configuration module is configured to: after receiving the metropolitan area query label packet sent by the metropolitan area server, modify the response packet label table of the metropolitan area server, and direct the metropolitan area response label packet corresponding to the protocol label to receive the metropolitan area query.
- the upstream port of the tag packet is configured to: after receiving the metropolitan area query label packet sent by the metropolitan area server, modify the response packet label table of the metropolitan area server, and direct the metropolitan area response label packet corresponding to the protocol label to receive the metropolitan area query.
- the node server may include the following modules:
- the IP access network module is configured to enter the metropolitan area network by using an IP node, where the metropolitan area network is an IP network structure.
- the node server may further include
- the No. 0 table initializes the configuration module, which is used to initialize its internal downlink protocol packet address table for the downward shutdown of each downlink protocol packet upon power-on.
- the node server may further include:
- the first setting module of the No. 0 table is configured to set, in the internal downlink protocol packet address table, a downlink port respectively directed by each downlink protocol packet;
- the downlink protocol packet sending module sends the downlink protocol packet through the corresponding downlink port according to the setting of the downlink protocol packet address table. More preferably, the node server may further include:
- a port allocation packet generating module configured to generate a port allocation package including the port allocation information
- the port allocation packet sending module sends the port allocation packet through a corresponding downlink port according to the setting of its internal downlink protocol packet address table.
- the node server is further provided with an address information table, and the address information table records address occupation information, device identification information, and device resource information.
- the node server may further include the following modules according to different situations of operation of the address information table:
- the node server further includes:
- the address information table initializing module is configured to initialize an address information table when the power is turned on, where the initializing includes:
- the write device resource information is the port information of the current node server.
- the node server also includes:
- the first update module of the address information table is configured to update the address information table according to the setting of the downlink port that is directed by each downlink protocol packet in the downlink protocol packet address table of the node server, and the update includes:
- the address of the access network to be allocated in each downlink protocol packet is respectively written in the blank entry of the address information table, and the address occupation information is marked as the address to be used.
- the node server also includes:
- the second update module of the address information table is configured to update the address information table according to the setting of the downlink port of the other access device that is directed to the port downlink protocol packet, where the update includes:
- the node server also includes:
- the third update module of the address information table is configured to update the address information table when receiving an incoming network command response sent by the access switch, where the update includes:
- the device resource information is updated to be the port information of the current access switch, and the access network address information of the access network device to which the port is connected.
- the node server also includes:
- the address information table fourth update module is configured to update the address information table when receiving a network access command response sent by the lower-level access network device, where the update includes:
- the address occupation information in the access network address corresponding entry of the lower-level access network device is marked as "the address is used;
- the device resource information is updated to be the port information of the current lower-level access network device, and the access network address information of the access network device to which the port is connected.
- the node server also includes:
- the first downlink sending module of the state downlink protocol packet is configured to stop sending the state downlink protocol packet to the access switch when the state uplink protocol packet sent by the access switch is not received within a preset time;
- a fourth update module of the address information table configured to update the address information table when the sending of the status downlink protocol packet to the access switch is stopped;
- the node server also includes:
- the second downlink sending module of the state downlink protocol packet is configured to stop sending the state downlink protocol packet to the lower-level access network device after receiving the state uplink protocol packet sent by the lower-level access network device within a preset time;
- the fifth update module of the address information table is configured to update the address information table when the sending of the status downlink protocol packet to the lower-level access network device is stopped; the updating includes:
- the address information table further includes uplink and downlink traffic information of the current access network device port, in order to facilitate control and management of the communication path of the lower-level access network device and the data transmission.
- the node server is further provided with an uplink protocol packet address table, and the node server further includes:
- Table 1 initializes the configuration module, which is used to set in the internal uplink protocol packet address table when powering up, and all uplink protocol packets are directed to the CPU module.
- the node server is further provided with a data packet address table, and the node server further includes:
- the packet address table configuration module when used for power-on, sets the direction of all packets to be closed in its internal packet address table.
- the node server For a subordinate access network device that requests access, the node server usually first determines whether it is legal, and sends a network access command to it when it is legal.
- the node server further includes :
- a first verification module configured to determine whether the registration information of the access switch exists, and if yes, determine that the access switch is legal; otherwise, determine that the access switch is invalid; if legal, trigger the first network access command sending module .
- a second verification module configured to determine whether the registration information of the access network device exists, and if yes, determine that the access network device is legal; otherwise, determine that the access network device is invalid; if legal, trigger the second access network Command sending module.
- the embodiment of the invention also discloses an access switch, which comprises the following modules:
- the No. 0 table initialization configuration module is configured to set all downlink protocol packets to the CPU module in the internal downlink protocol packet address table when the power is turned on; a downlink protocol packet receiving module, configured to receive a downlink protocol packet sent by the node server, and according to the setting of the downlink protocol packet address table, direct the downlink protocol packet to a CPU module of the access switch, where the downlink protocol packet is included Include an access network address to be allocated; an uplink protocol packet replying module, configured to generate an uplink protocol packet by the CPU module, and send the uplink protocol packet to the node server;
- the first network access command receiving module is configured to receive a network access command sent by the node server, where the network access command includes an access network address of the access switch, where the access network address is a downlink protocol packet received by the access switch.
- the first setting module of the No. 0 table is used to update the internal downlink protocol packet address table, and only the protocol packet whose destination address is its own access network address is directed to the CPU module.
- the access switch After accessing the network, the access switch further includes the following modules:
- a port allocation packet receiving module configured to receive a port allocation packet sent by the node server after entering the network; the port allocation packet includes port allocation information, where the port allocation information is that each port downlink protocol packet is directed to each downlink port of the access switch. Information;
- a first guiding module configured to direct a port allocation packet whose destination address is its own access network address to the CPU module
- the second setting module of the No. 0 table is configured to set, according to the port allocation information, a downlink port directed by each port downlink protocol packet in its internal downlink protocol packet address table.
- the access switch further includes the following modules:
- a port downlink protocol packet receiving module configured to receive a port downlink protocol packet sent by the node server after entering the network; the port downlink protocol packet includes an access network address to be allocated;
- the second guiding module is configured to direct the port downlink protocol packet to the corresponding downlink port according to the setting of the internal downlink protocol packet address table.
- the access switch further includes a network access command response module, configured to send a network access command response to the node server.
- the receiving switch further includes: when receiving the status downlink protocol packet that is sent by the node server. a state downlink protocol packet receiving module, configured to receive a state downlink protocol packet periodically sent by the node server after entering the network;
- the third guiding module is configured to direct, according to the setting of the internal downlink protocol packet address table, the downlink protocol packet whose destination address is the access network address of the user to the CPU module;
- the status uplink protocol packet replying module is configured to generate a status uplink protocol packet by the CPU module, and send the status uplink protocol packet to the node server.
- the access switch further includes:
- the fourth guiding module is configured to, according to the setting of the internal downlink protocol packet address table, direct the state downlink protocol packet whose destination address is the access network address of the lower-level access network device to the corresponding port; The port is transmitted to the corresponding lower level access network device.
- the access switch is further provided with an uplink protocol packet address table, and the access switch further includes:
- Table 1 initializes the configuration module, which is used to set all upstream protocol packet-oriented uplink ports in its internal uplink protocol packet address table when powering up.
- the access switch is further provided with a data packet address table, and the access switch further includes:
- the packet address table configuration module is used to set the direction of all packets to be closed in the internal packet address table on power-up.
- the embodiment of the present invention further discloses a network access system of an access network device, where the access network device includes a node server and an access switch connected to the lower level, and the node server includes sending a downlink protocol packet to the access switch. a downlink protocol packet sending module, and a first network access command sending module that sends an incoming network command according to an uplink protocol packet replied by the access switch;
- the access switch includes:
- the No. 0 table initialization configuration module is configured to set all downlink protocol packets to the CPU module in the internal downlink protocol packet address table when the power is turned on; a downlink protocol packet receiving module, configured to direct, according to the setting of the downlink protocol packet address table, the received downlink protocol packet to a CPU module of the access switch, where the downlink protocol packet includes an access network address to be allocated ;
- An uplink protocol packet replying module configured to generate an uplink protocol packet by the CPU module, and send the uplink protocol packet to the node server;
- the first network access command receiving module is configured to receive a network access command sent by the node server, where the network access command includes an access network address of the access switch, where the access network address is a downlink protocol packet received by the access switch.
- the first setting module of the No. 0 table is used to update the internal downlink protocol packet address table, and only the protocol packet whose destination address is its own access network address is directed to the CPU module.
- the access switch is also connected to other subordinate access network devices.
- the node server sends a port allocation packet to the access switch that has entered the network, which is a preferred implementation of the present invention.
- the node server further includes a port allocation packet sending module, configured to send a port allocation packet to the access switch that has entered the network, where the port allocation packet includes port allocation information, and the port allocation information is a downlink protocol packet of each port. Information directed to each downlink port of the access switch;
- the access switch further includes:
- a first guiding module configured to direct a port allocation packet whose destination address is its own access network address to the CPU module
- the second setting module of the No. 0 table is configured to set, according to the port allocation information, a downlink port directed by each port downlink protocol packet in its internal downlink protocol packet address table.
- the node server further includes a port downlink protocol packet sending module, configured to send a port downlink protocol packet to the access switch that has entered the network, where the port downlink protocol packet includes an access network address to be allocated;
- the access switch further includes:
- the second guiding module is configured to direct the port downlink protocol packet to the corresponding downlink port according to the setting of the internal downlink protocol packet address table.
- the access network device further includes a lower-level access network device connected to a downlink port of the network access switch, where the node server further includes, for the lower-level access network The device sends a second network access command sending module to the network access command; the lower-level access network device includes:
- a port uplink protocol packet replying module configured to generate a port uplink protocol packet for the received port downlink protocol packet, and send the packet to the node server;
- the second network access command receiving module is configured to receive a network access command sent by the node server, where the network access command includes an access network address of the lower-level access switch, where the access network address is a receiving port of the lower-level access switch. The address of the access network to be allocated in the downlink protocol packet.
- the lower-level access network device includes an access switch or a terminal.
- the access switch further includes: a third setting module of the No. 0 table, configured to update the internal downlink protocol packet address table according to the network access command, and set the purpose.
- the protocol packet whose address is its own access network address is directed to the CPU module.
- the node server When the node server receives the network access command response sent by the access switch, it knows that the access switch has entered the network, and then periodically sends a state downlink protocol packet to the access switch, that is, as a preferred embodiment of the present invention.
- the node server further includes a state downlink protocol packet sending module configured to periodically send a state downlink protocol packet to the access switch that has entered the network;
- the access switch further includes:
- the third guiding module is configured to direct, according to the setting of the internal downlink protocol packet address table, the downlink protocol packet whose destination address is the access network address of the user to the CPU module;
- the status uplink protocol packet replying module is configured to generate a status uplink protocol packet by the CPU module, and send the status uplink protocol packet to the node server.
- the node server For a lower-level access network device connected to an access switch, the node server also periodically sends a state downlink protocol packet to the lower-level access network device, that is, as a preferred embodiment of the present invention, the access The switch also includes: The fourth guiding module is configured to, according to the setting of the internal downlink protocol packet address table, direct the state downlink protocol packet whose destination address is the access network address of the lower-level access network device to the corresponding port; The port is transmitted to the corresponding lower level access network device.
- the lower-level access switch further includes:
- the status uplink protocol packet replying module is configured to generate a status uplink protocol packet for the received status downlink protocol packet, and send the status uplink protocol packet to the node server.
- the terminal further includes:
- the status uplink protocol packet replying module is configured to generate a status uplink protocol packet for the received status downlink protocol packet, and send the status uplink protocol packet to the node server.
- the access switch is further provided with an uplink protocol packet address table, and the access switch further includes:
- Table 1 initializes the configuration module, which is used to set all upstream protocol packet-oriented uplink ports in its internal uplink protocol packet address table when powering up.
- the access switch further includes a data packet address table, and the access switch further includes:
- the packet address table configuration module is used to set the direction of all packets to be closed in the internal packet address table on power-up.
- the node server when the node server is connected to the network, the node server further includes: an initialization module, configured to import the registration information of the lower-level access network device after power-on to
- CPU obtain the metropolitan area network address, and configure its own access network address.
- the node server further includes the following modules for accessing the metropolitan area network:
- a protocol label and an address obtaining module configured to obtain an allocated protocol label and a metropolitan area network address from the metropolitan area server after accessing the metropolitan area network, where the protocol label is used to describe a connection between the node server and the metropolitan area server;
- the upper-level connection device includes a node switch and a metropolitan area server;
- the metropolitan area network is a network with centralized control functions.
- the utility model includes a metropolitan area server, a node switch, and a node server, wherein the node switch is connected between the metropolitan area server and the node server;
- a data label obtaining module configured to obtain, for each service request across the metropolitan area network, a data label of the allocated service to the secondary service from the metropolitan area server, where the data label is used to describe a connection between the node servers involved in the service ;
- a label adding module configured to send a protocol packet or a data packet to a protocol packet or a data packet sent by the node server to the metropolitan area network;
- a label deletion module is configured to remove a corresponding protocol label or data label from a protocol packet or a data packet received from the metropolitan area network.
- the label is divided into an inbound label and an outgoing label, and the inbound label refers to a label of the data packet entering the metropolitan area server or the node switch, and the outgoing label refers to the label of the data packet leaving the metropolitan area server or the node switch;
- the inbound label and the outgoing label of the same data packet are different labels, or are the same label; the label includes a protocol label and a data label.
- the node server further includes:
- An address-to-label mapping table configured to record, for each service across the metropolitan area network, a binding relationship between an access network address and an outgoing label of two terminals across the metropolitan area network; wherein, the access network address is each node The address assigned by the server to the networked device connected to it;
- the label adding module searches the outbound label corresponding to the protocol packet or the data packet sent by the node server to the metropolitan area network according to the address-tag mapping table, and adds the found outbound label to be sent.
- the node server further includes:
- the protocol package label table is configured to set all the metropolitan area protocol packets to the CPU module when the node server is powered on, and the metropolitan area protocol package includes the metropolitan area query label package and the metropolitan area service application package sent by the metropolitan area server.
- the node server further includes:
- the response packet label table is configured to direct the metropolitan area response label packet to the corresponding uplink port respectively;
- the response packet label table initialization module is configured to set the direction of all the metropolitan area response label packets to be closed when the node server is powered on;
- the response packet label table configuration module is configured to: after receiving the metropolitan area query label packet sent by the metropolitan area server, modify the response packet label table of the metropolitan area server, and direct the metropolitan area response label packet corresponding to the protocol label to receive the metropolitan area query.
- the upstream port of the tag packet is configured to direct the metropolitan area response label packet to the corresponding uplink port respectively.
- the node server further includes an IP access network module for accessing the metropolitan area network, and is configured to enter the metropolitan area network by using an IP node, where the metropolitan area network is an IP network structure.
- the node server further includes:
- the No. 0 table initializes the configuration module, which is used to initialize its internal downlink protocol packet address table for the downward shutdown of each downlink protocol packet upon power-on.
- the node server further includes:
- the first setting module of the No. 0 table is configured to set, in the internal downlink protocol packet address table, a downlink port respectively directed by each downlink protocol packet;
- the downlink protocol packet sending module sends the downlink protocol packet through the corresponding downlink port according to the setting of the downlink protocol packet address table.
- the node server further includes:
- a port allocation packet generating module configured to generate a port allocation package including the port allocation information
- the port allocation packet sending module sends the port allocation packet through a corresponding downlink port according to the setting of its internal downlink protocol packet address table.
- the node server is further provided with an address information table, and the address information table records address occupation information, device identification information, and device resource information.
- the node server may further include the following modules according to different situations of operation of the address information table:
- the node server further includes:
- the address information table initializing module is configured to initialize an address information table when the power is turned on, where the initializing includes:
- the write device resource information is the port information of the current node server.
- the node server further includes:
- the first update module of the address information table is configured to update the address information table according to the setting of the downlink port that is directed by each downlink protocol packet in the downlink protocol packet address table of the node server, and the update includes:
- the address of the access network to be allocated in each downlink protocol packet is respectively written in the blank entry of the address information table, and the address occupation information is marked as the address to be used.
- the node server further includes:
- the second update module of the address information table is configured to update the address information table according to the setting of the downlink port of the other access device that is directed to the port downlink protocol packet, where the update includes:
- the address of the to-be-assigned access network in each port downlink protocol packet is respectively written, and the address occupation information is marked as the address to be used.
- the node server further includes:
- the third update module of the address information table is configured to update the address information table when receiving an incoming network command response sent by the access switch, where the update includes:
- the device resource information is updated to be the port information of the current access switch, and the access network address information of the access network device to which the port is connected.
- the node server further includes:
- the address information table fourth update module is configured to update the address information table when receiving a network access command response sent by the lower-level access network device, where the update includes:
- the address occupation information in the access network address corresponding entry of the lower-level access network device is marked as "the address is used;
- the device resource information is updated to be the port information of the current lower-level access network device, and the access network address information of the access network device to which the port is connected.
- the node server further includes:
- the first downlink sending module of the state downlink protocol packet is configured to stop sending the state downlink protocol packet to the access switch when the state uplink protocol packet sent by the access switch is not received within a preset time;
- a fourth update module of the address information table configured to update the address information table when the sending of the status downlink protocol packet to the access switch is stopped;
- the node server further includes:
- the second downlink sending module of the state downlink protocol packet is configured to stop sending the state downlink protocol packet to the lower-level access network device after receiving the state uplink protocol packet sent by the lower-level access network device within a preset time;
- the fifth update module of the address information table is configured to update the address information table when the sending of the status downlink protocol packet to the lower-level access network device is stopped; the updating includes:
- the address information table of the node server further includes uplink and downlink traffic information of the current access network device port.
- the node server is further provided with an uplink protocol packet address table, and the node server further includes:
- Table 1 initializes the configuration module, which is used to set in the internal uplink protocol packet address table when powering up, and all uplink protocol packets are directed to the CPU module.
- the node server is further provided with a data packet address table, and the node server further includes:
- the packet address table configuration module when used for power-on, sets the direction of all packets to be closed in its internal packet address table.
- the node server further includes:
- a first verification module configured to determine whether the registration information of the access switch exists, and if yes, determine that the access switch is legal; otherwise, determine that the access switch is invalid; if legal, trigger the first network access command sending module .
- the node server further includes:
- the node server of the present invention mainly includes a network interface module, a switching engine module, a CPU module, and a disk array module.
- the access switch of the present invention mainly includes a network interface module (a downlink network interface module).
- the uplink network interface module the switching engine module
- the CPU module may be configured with an address table when receiving the packet, or may parse the packet and generate a response packet. Therefore, in order to enable a person skilled in the art to better understand the present invention, in the embodiment of the present invention, the modules involved in the network access system of the node server, the access switch, and the access network device of the present invention are mainly described from a functional perspective. In essence, however, these functional modules correspond to actual hardware modules. Compared with the prior art, the present invention has the following advantages:
- multimedia services are significantly different from the basic conditions necessary for traditional data services (such as web text, images, email, FTP, and DNS services).
- multimedia services are particularly sensitive to end-to-end latency and latency changes, but can tolerate occasional data loss.
- the present invention allocates the address of each network device by sending a query packet to each communication port in a master control manner, and establishes a clear network topology on the master server side in the process of allocation.
- the corresponding communication link can be directly allocated by the main control server (because it clarifies the device topology of the entire network), and no routing negotiation is required between the respective network devices (
- the existing IP protocol scheme ensures a stable transmission rate and avoids delays.
- each data packet of each service is transmitted through the same communication link, unlike the solution of the existing IP protocol, each data packet relies on self-negotiation to solve the routing problem in the data packet. Before sending, it does not know which path it will go through, that is, two packets of the same service may be transmitted to the target terminal through different paths. Thus, the present invention can ensure a stable transmission rate and avoid delay as compared with the present invention.
- FIG. 1 is a schematic diagram showing the hardware structure of a node server according to the present invention.
- FIG. 2 is a schematic structural diagram of hardware of an access switch according to the present invention.
- FIG. 3 is a schematic diagram of a network access process of an access switch according to the present invention:
- FIG. 4 is a schematic diagram of a connection between a node server and an access switch according to the present invention
- FIG. 5 is a schematic diagram of a terminal network access process of the present invention:
- FIG. 6 is a schematic diagram of connection of a node server, an access switch, and a terminal according to the present invention
- FIG. 7 is a schematic diagram of a node switch network access process of the present invention.
- FIG. 8 is a schematic diagram of connection of a metropolitan area server, a node switch, and a node server according to the present invention.
- Figure 9 is a diagram showing the connection of a metropolitan area server, a node switch, a node server, and a terminal of the present invention.
- the inventor of the present invention believes that the sufficient conditions for realizing the quality assurance of the whole network of the present invention are as follows:
- the mechanism of "Best Efforts" in the core theory of IP Internet will inevitably lead to uneven network traffic and frequent packet loss.
- the TCP protocol uses the network packet loss status to regulate the transmission traffic.
- the inventor of the present invention believes that various current QoS methods are based on a false assumption. Based on this assumption, the solution to QoS is to provide priority for video traffic. But the fact is, because the network traffic required by different media forms is extremely uneven, as long as a few people use video services, the video traffic on the network will occupy the absolute main body.
- the invention is like a highway, does not require police and traffic lights, cement-separated lanes and overpasses to ensure that the car is on a prescribed road. According to the experience of the California Department of Transportation, the way to avoid highway traffic jams is to close the entrance ramp.
- Each path calculates and measures the flow, once the flow is near saturation, take a detour or reject new users.
- the TV of the embodiment of the present invention can achieve a packet loss rate of one millionth of a million under a heavy load of 90%.
- Computer files and streaming media are two distinct forms of media that are mutually exclusive.
- the network theory and practice of the present invention reveals two outcomes: •
- the present invention is a hundred times better than the IP Internet.
- the PSTN telephone network uses a strict synchronization mechanism, and network congestion does not occur until the traffic is 100% full. In theory, after multiple merges are merged, they are evenly streamed. Practice has further proved that under the premise of uniform flow, network traffic can be close to the limit value without packet loss. Because it occupies more than 90% of the video traffic in future network traffic, it has its own characteristics. Therefore, the way of the Internet quality assurance of the present invention, which is mainly aimed at the video service, is to eliminate the unevenness of the source traffic, especially to prevent the packet loss phenomenon of the network switch under heavy load conditions.
- a connection-oriented circuit is established by using an improved Ethernet, and a fixed-length data packet is uniformly used in the entire network. As long as the packet time interval is changed, a media stream of any bandwidth can be obtained.
- the Internet of the present invention requires that the terminal design must have a current sharing capability. However, in the actual network environment, it is obviously impossible to hope that the user will consciously abide by the current sharing regulations. Therefore, in the embodiment of the present invention, the node server issues a pass to the network switch, and only allows the user data packet to pass through with a very fine time precision. For user terminals designed to meet the specified requirements, the pass is completely transparent.
- the network practice has obtained satisfactory results, and the switch of the present invention can obtain a overloaded packet loss rate of more than one million in a condition of 90% bandwidth utilization.
- the new network is a centralized control network structure.
- the network can be a tree network, a star network, a ring network, etc., but on this basis, a centralized control node is needed in the network to control the entire network.
- the new network is divided into two parts: the access network and the metropolitan area network.
- the devices in the access network can be mainly divided into three categories: node servers, access switches, and terminals (including various set-top boxes, code boards, memories, etc.).
- the node server is a node in the access network that functions as a centralized control, and can control the access switch and the terminal.
- the node server can be directly connected to the access switch or directly connected to the terminal.
- the devices in the metropolitan area network can also be divided into three categories: metropolitan area servers, node switches, and node servers.
- the node server is the node server of the access network part, that is, the node server belongs to both the access network part and the metropolitan area network part.
- the metropolitan area server is a node that functions as a centralized control function in the metropolitan area network, and can control the node switch and the node server.
- the metro server can be directly connected to the node switch or directly to the node server. It can be seen that the whole new network is a layered and centralized control network structure, and the network controlled by the node server and the metropolitan area server can be various structures such as a tree type, a star type, and a ring type.
- the devices in the novel network system of the present invention can be mainly classified into three categories: servers, switches (including Ethernet gateways), terminals (including various set top boxes, code boards, memories, etc.).
- the new network can be divided into a metropolitan area network (or national network, global network, etc.) and an access network as a whole.
- the devices in the access network can be mainly divided into three categories: node server, access switch (including Ethernet gateway), terminal (including various set-top boxes, code boards, memory, etc.).
- each access network device is:
- the network interface module 101, the switching engine module 102, the CPU module 103, and the disk array module are mainly included;
- the packets from the network interface module 101, the CPU module 103, and the disk array module 104 all enter the switching engine module 102;
- the switching engine module 102 performs an operation of checking the address table 105 for the incoming packet, thereby obtaining the packet guiding information;
- the packet's navigation information stores the packet in the queue of the corresponding packet buffer 106; if the packet buffer 106 is nearly full, it is discarded;
- the switching engine module 102 polls all packet buffer queues, and forwards if the following conditions are met: : 1) The port send buffer is not full; 2) The queue packet counter is greater than zero.
- the disk array module 104 mainly implements control of the hard disk, including initialization, reading and writing, and the like of the hard disk.
- the CPU module 103 is mainly responsible for protocol processing with the access switch and the terminal (not shown), and the address table 105 is The configuration of the downlink protocol packet address table, the uplink protocol packet address table, and the packet address table, and the configuration of the disk array module 104.
- the network interface module (the downlink network interface module 201, the uplink network interface module 202), the switching engine module 203, and the CPU module 204 are mainly included;
- the packet (uplink data) coming in by the downlink network interface module 201 enters the packet detecting module 205; the packet detecting module 205 detects whether the packet destination address (DA), the source address (SA), the packet type, and the packet length meet the requirements, if If yes, the corresponding stream identifier (stream-id) is assigned and enters the switching engine module 203, otherwise discarded; the incoming packet (downlink data) of the upstream network interface module 202 enters the switching engine module 203; the data entered by the CPU module 204 The packet enters the switching engine module 203; the switching engine module 203 performs an operation of checking the address table 206 for the incoming packet to obtain the packet guiding information; if the packet entering the switching engine module 203 is the downlink network interface to the upstream network interface, The packet is stored in the queue of the corresponding packet buffer 207 in conjunction with the stream identifier (stream-id); if the queue of the packet buffer 207 is nearly full, it is discarded; if the packet entering the switching engine
- the switching engine module 203 polls all packet buffer queues. In the embodiment of the present invention, there are two cases: If the queue is the downlink network interface to the uplink network interface, the following conditions are met: 1) the port transmission buffer is not full; 2) the queue packet counter is greater than zero; 3) obtaining the token generated by the rate control module ;
- the queue is not the downlink network interface to the upstream network interface, the following conditions are met: 1) The port transmission buffer is not full; 2) The queue packet counter is greater than zero.
- the rate control module 208 is configured by the CPU module 408 to generate a token for all downlink network interfaces to the packet buffer queue of the uplink network interface in a programmable interval to control the bit rate of the uplink forwarding.
- the CPU module 248 is primarily responsible for protocol processing with the node server, configuration of the address table 206, and configuration of the rate control module 208.
- the utility model mainly comprises a network interface module, a service processing module and a CPU module; for example, the set top box mainly comprises a network interface module, an audio and video codec engine module and a CPU module; the coding board mainly comprises a network interface module, an audio and video coding engine module and a CPU module; It mainly includes network interface module, CPU module and disk array module.
- the equipment of the metropolitan area network can be mainly divided into two categories: node server, node switch, and metropolitan area server.
- the node switch mainly includes a network interface module, a switching engine module, and a CPU module;
- the metropolitan area server mainly includes a network interface module, a switching engine module, and a CPU module.
- the data packet of the access network mainly includes the following parts: destination address (DA), source address (SA), reserved byte, pay l oad (PDU), CRC.
- DA destination address
- SA source address
- PDU pay l oad
- the data packets of the access network mainly include the following parts:
- the destination address (DA) consists of 8 bytes (byte), the first byte indicates the type of packet (such as various protocol packets, multicast packets, unicast packets, etc.), and there are up to 256 possibilities.
- the second byte to the sixth byte are the metropolitan area network addresses, and the seventh and eighth bytes are the access network addresses;
- the source address (SA) is also composed of 8 bytes, and the definition is the same as the destination address (DA);
- the reserved byte consists of 2 bytes
- the CRC consists of 4 bytes and its calculation method follows the standard Ethernet CRC algorithm.
- the topology of the metropolitan area network is a pattern. There may be two or even more than two connections between the two devices, that is, the node switch and the node server, the node switch, and the node switch, the node switch, and the node server may exceed 2 kinds of connections.
- the metropolitan area network address of the metropolitan area network device is unique.
- the parameter: label is introduced in the embodiment of the present invention to uniquely describe a metropolitan area network device.
- the definition of the label in this specification is similar to the definition of the label of MPLS (Mu lt i-Protoco l Labe l Swi t ch, multi-protocol label switching). Assuming that there are two connections between device A and device B, then the packet is slave. A to device B has 2 tags, and the packet has 2 tags from device B to device A. The tag is tagged and tagged. Assume that the tag of the packet entering device A (inbound tag) is 0x0000, and the tag (outbound tag) when the packet leaves device A may become 0x0001.
- the access network process of the metropolitan area network is the network access process under centralized control, which means that the address allocation and label allocation of the metropolitan area network are dominated by the metropolitan area server, and the node switch and the node server are passively executed.
- the label assignment with MPLS is different.
- the label assignment of MPLS is the result of mutual negotiation between the switch and the server.
- the metropolitan area network data packet mainly includes the following parts: That is, destination address (DA), source address (SA), reserved byte (Reserved), label, payload (PDU), CRC.
- the format of the label can be defined as follows:
- the label is 32 bits, wherein the high 16 bits are reserved, and only the lower 16 bits are used, and its position is between the reserved bytes of the data packet and the payload.
- a downlink protocol packet (a protocol packet sent by the node server to the access switch and the terminal); an uplink protocol packet (by the access switch, the terminal) a protocol packet that responds to the node server); a unicast packet;
- the address of the access network is 16 bits in total, so the total number of access switches and terminals that can be accessed is 65536. It is assumed that the datagram type of the downlink protocol packet is "1000 0000" (binary), that is, 0x80 (hexadecimal). The datagram type of the uplink protocol packet is "00001000” (binary), that is, 0x08 (hexadecimal), and the datagram type of the unicast packet is "0001 0000" (binary), that is, 0x10 (hexadecimal) System), the datagram type of the multicast packet is "01111000" (binary), that is, 0x78 (hexadecimal). By combining the same items, the address table of 4 bar and 8 bit length can be mapped to a 2 bit long address table. E.g:
- the output of the address table indicates the packet-oriented port.
- one of the access switches BX-008 has one uplink 100 Mbps network port, eight downstream 100 Mbps network ports, and one CPU module interface. If the eight downstream 100M network ports are defined as ports 0 to 7, respectively, the CPU module interface is defined as port 8, and one upstream 100M port is defined as port 9, which requires a total of 256K X lObit addresses.
- the output of the address table is "00 0000 0001" for packet-oriented port 0, "11 0000 0000" for packet-oriented port 8, port 9, and so on.
- each access switch that is allowed to access the network must be registered in the node server, and the unregistered access switch cannot access the network.
- the process of accessing the access switch into the network involves the following steps:
- the node server sends a query packet to each port, and the access switch sends a response packet after receiving the query packet, where the response packet includes registration information of the current access switch.
- the node server After receiving the response packet sent by the access switch, the node server knows which port is connected to an access switch, and then finds the access switch information in the registration information table of the node server to the access switch. Sending a network access command (informing the access network address), the access switch enters the network after receiving the network access command, and sends a network access command response to the node server; S3. After receiving the network access command sent by the access switch, the node server knows that the access switch has entered the network, and periodically sends a status inquiry packet to the port to check whether the access switch works normally, and also to the The downlink port of the access switch sends a port query packet to check whether other access network devices are connected to the access switch.
- a status query response is sent to the node server after receiving the device status query command.
- the node server does not receive the status query response within a certain period of time, it considers that the access switch has been removed from the network, no longer sends the status query packet, and continues to send the query packet to the port.
- MSS-400 server After the MSS-400 server is powered on, initialize the hardware and obtain the default metropolitan area network address (assumed to be 0x00 0x0000 0x0000). Import the configuration file from the hard disk to the CPU memory (such as the registration information of the switch, the registration information of the terminal, etc.), MSS. -400 server configures its own access network address to 0x0000;
- MSS-400 server initialization 0, 1, 2, 3 table:
- the MSS-400 server knows that it has 8 downlink ports, so it configures the entries of the eight 0 tables:
- the packet is received into its CPU module. After the CPU parses the query packet, it generates a response packet (the response packet contains the registration information of the switch) and sends it to the MSS-400 server.
- the DA of the response packet is 0x0800 0x0000 0x0000 0x0000.
- SA is 0x0000 0x0000 0x0000 0x0001;
- the MSS-400 server After receiving the response packet sent by the BX-008-0 switch, the MSS-400 server compares the source address (SA) of the response packet with the device type to know that its port 0 is connected to an access switch, and then The information of the access switch is found in the registration information table of the node server, and the network access command is sent to the access switch (informing that the access network address is 0x0001);
- the BX-008-0 switch After receiving the network access command, the BX-008-0 switch knows that its access network address is 0x0001 and enters the network. Therefore, its 0th table "00 0000 0000 0001" is set to "01 0000 0000", and 0 The remaining entries in the table are configured as "00 0000 0000", that is, only the downstream protocol packet of the switch is imported into the CPU, and the incoming network command response is sent to the MSS-400 server.
- the MSS-400 server receives the incoming command response from the BX-008-0 switch and knows that the BX-008-0 switch has entered the network. After that, it sends a device status query command to this port every second, checking BX-008-0. Whether the switch works normally, and also sends the port downlink protocol packet to the downlink port of the BX-008-0 switch to check whether other access network devices are connected under the access switch. In this case, the MSS-400 server Will do the following configuration in its table 0:
- the destination address (DA) is 0x8000 0x0000 0x0000 0x000a of the port downlink protocol packet oriented port 0;
- the destination address (DA) is 0x8000 0x0000 0x0000 0x000b of the port downlink protocol packet oriented port 0;
- the destination address (DA) Is 0x8000 0x0000 0x0000 0x000c port downlink protocol packet is directed to port 0;
- ie destination address (DA) is 0x8000 0x0000 0x0000 OxOOOd port downstream protocol packet oriented port 0;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000e port downstream protocol packet oriented port 0;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000f port downstream protocol packet oriented port 0;
- the MSS-400 server will allocate the packet through the port including the port allocation information, and inform the BX-008-0 switch to do the following configuration in its table No. 0:
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000a port downstream protocol packet is directed to port 1;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000b port downstream protocol packet oriented port 2;
- ie destination address (DA) is 0x8000 0x0000 0x0000 OxOOOd port downstream protocol packet is directed to port 4;
- the destination address (DA) is 0x8000 0x0000 0x0000 0x000e of the port downlink protocol packet to port 5;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x0010 port downstream protocol packet is directed to port 7;
- MSS-400 server destination address is 0x8000 0x0000 0x0000 0x0009, 0x8000 0x0000 0x0000 0x000a, 0x8000 0x0000 0x0000 0x000b, 0x8000 0x0000 0x0000 0x000c, 0x8000 0x0000 0x0000 OxOOOd, 0x8000 0x0000 0x0000 OxOOOe, 0x8000 0x0000 0x0000 OxOOOf, 0x8000 0x0000 0x0000 0x0010
- SA is 0x0000 0x0000 0x0000 0x0000
- the port downlink protocol packet will be directed to the MSS-400 server port No. 0.
- the port downlink protocol packet will be directed to the BX in turn.
- S ll, BX-008-1 switch receives port downlink protocol packet from port 1 of BX-008-0 switch (that is, port downlink protocol with destination address 0x8000 0x0000 0x0000 0x000a)
- the port uplink protocol packet (the port uplink protocol packet contains the registration information of the switch)
- the DA of the packet is 0x0800 0x0000 0x0000 0x0000
- the SA is 0x0000 0x0000 0x0000 0x0000 0x000a;
- the MSS-400 server After receiving the port uplink protocol packet sent by the BX-008-1 switch, the MSS-400 server compares the source address (SA) of the uplink protocol packet with the device type to know that port 1 of BX-008-0 is connected. The station accesses the switch, and then finds the connection switch information in the registration information table inside the server, and sends an incoming network command to the access switch (informing its access network address is 0x000a);
- the BX-008-1 switch After receiving the network access command, the BX-008-1 switch knows that its access network address is 0x000a and enters the network. Configure its 0th table "00 0000 0000 0000 1010" as "01 0000 0000", the rest of the 0th table. The entry is configured as "00 0000 0000", that is, only the downlink protocol packet of the switch is imported into the CPU, and the network access command response is sent to the server;
- the MSS-400 server After receiving the network access command sent by the switch, the MSS-400 server knows that the BX-008-1 switch has entered the network, and then sends a device status query command to the port every second to check whether the BX-008-1 switch works normally. At the same time, send the port downlink protocol packet to the downlink port of the BX-008-1 switch to check whether other access network devices are connected to the access switch. If the current access switch works normally, it will send a status query response to the server after receiving the device status query command. When the server does not receive the status query response within 6 seconds, it considers that the access switch has been removed from the network, no longer sends the device status query command, and continues to send the query packet to the port. 3.1.3 Terminal Access Process:
- each terminal that is allowed to access the network must be registered in the node server, and the terminal that is not registered cannot access the network.
- the process of the terminal accessing the network involves the following steps:
- the node server sends a query packet to each port, and the terminal sends a response packet after receiving the query packet, where the response packet includes the registration information of the terminal;
- the node server After receiving the response packet sent by the terminal, the node server knows which port is connected to which terminal (set top box, code board or memory), and then finds the information of the terminal in the registration information table inside the node server, to the terminal. Sending a network access command (informing the access network address of the terminal), the terminal enters the network after receiving the network access command, and sends a network access command response to the node server;
- the node server After receiving the network access command sent by the terminal, the node server knows that the terminal has entered the network, and periodically sends a status inquiry packet to the port to check whether the terminal works normally. If the terminal works normally, it will send a status query response to the node server after receiving the status inquiry packet. When the node server does not receive the status query response within a certain period of time, it recognizes that the terminal has been removed from the network, does not send the status query packet, and continues to send the query packet to the port.
- the address of the access network can be set to 16 bits, and all access network devices have unique access network addresses (including set-top boxes, access switches, Memory, even the node server itself).
- an address information table can be maintained in the CPU module of the node server.
- the size of the table is 2 to the 16th power, that is, 64K, and the entries of each table. It consists of the following:
- Address occupation descriptor "00" indicates that the address is not used, "01” indicates that the address is inactive (the node server sends the port downlink protocol packet with this address, but does not receive the incoming line protocol packet), "10” " Indicates that this address is used (set by the node server after receiving the incoming line protocol package);
- device resource description information for example, if the device is an access switch, the access network address of the device connected to the network port, and the uplink and downlink traffic of each network port; if the device is a memory, its The access network address of the device connected to the network port, the count of its read and write channels, and the upstream and downstream traffic counts of the network port; etc., all of this information is used to provide decision-making basis for the service process, and will be modified in each service flow. these messages.
- Port 0 of BX-008-0 is connected to a set-top box STB-0
- port 1 of BX-008-1 is connected to a set-top box STB-1.
- MSS-400 server After the MSS-400 server is powered on, initialize the hardware and obtain the default metropolitan area network address (assumed to be 0x00 0x0000 0x0000). Import the configuration file from the hard disk to the CPU memory (such as the registration information of the switch, the registration information of the terminal, etc.), MSS. -400 server initialization address information table, all cleared (indicating that all addresses are not used), MSS-400 server configures its own access network address to 0x0000, that is, the 0x0000 item of the address information table is configured as follows:
- This node server has eight downstream 100M network ports defined as port 0 to port 7, one CPU module interface is defined as port 8, and one disk array interface is defined as port 9. 1 uplink Gigabit optical port is defined as port 10, the node server model is MSS-400, the access network address of the device connected to its network port is not allocated, and the uplink and downlink traffic count of each network port is 0;
- the next available address in the address information table is 0x0001;
- MSS-400 server initialization 0, 1, 2, 3 table:
- the next available address of the address information table is 0x0009;
- BX-008-0, BX-008-1 switch initializes the hardware after power-on
- the BX-008-0 switch After receiving the query packet, the BX-008-0 switch receives the query packet to its CPU module according to the configuration of the No. 0 table, and the CPU module parses the query packet and generates a response packet.
- the response contains the registration information of the access switch) and sends it to the MSS-400 server.
- the DA of the packet is 0x0800 0x0000 0x0000 0x0000, SA 0x0000 0x0000 0x0000 0x0001;
- the MSS-400 server After receiving the response packet sent by the BX-008-0 switch, the MSS-400 server compares the source address (SA) of the response packet with the device type to know that the port 0 is connected to an access switch, and then The information of the access switch is found in the registration information table of the node server, and the network access command is sent to the access switch (informing that the access network address is 0x0001);
- the BX-008-0 switch After receiving the network access command, the BX-008-0 switch knows that its access network address is 0x0001 and enters the network. Therefore, its 0th table "00 0000 0000 0001" is set to "01 0000 0000", table 0 The other entries are configured as "00 0000 0000", that is, only the downlink protocol packet of the switch is imported into the CPU, and the network access command response is sent to the server;
- the MSS-400 server receives the incoming network command response from the BX-008-0 switch. It knows that the BX-008-0 switch has entered the network, so the 0x0001 item in the address information table inside the server is configured as:
- This access switch has eight downstream 100M network ports defined in turn. For port 0 to port 7, one CPU module interface is defined as port 8, and one uplink 100 Mbps port is defined as port 9, the access switch model is BX-008, and its upstream network port is connected.
- the access network address of the device is 0x0000 (ie MSS-400), the access network address of the device connected to the downlink network port is not allocated, and the uplink and downlink traffic counts of each network port are 0;
- the MSS-400 server will do the following configuration in its table 0:
- the destination address (DA) is 0x8000 0x0000 0x0000 0x000a of the port downlink protocol packet oriented port 0;
- the destination address (DA) is 0x8000 0x0000 0x0000 0x000b of the port downlink protocol packet oriented port 0;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000c port downstream protocol packet oriented port 0;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000d port downstream protocol packet oriented port 0;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000e port downstream protocol packet oriented port 0;
- ie destination address (DA) is 0x8000 0x0000 0x0000 0x000f port downstream protocol packet oriented port 0;
- the MSS-400 server will distribute the packet through the port that includes the port assignment information.
- the BX-008-0 switch has the following configuration in its table No. 0:
- ie destination address (DA) is sufficient 0x8000 0x0000 0x0000 0x0009 port downstream protocol packet oriented port 0;
- ie destination address (DA) is sufficient 0x8000 0x0000 0x0000 0x000a port downstream protocol packet is directed to port 1;
- ie destination address (DA) is sufficient 0x8000 0x0000 0x0000 0x000f port downstream protocol packet is directed to port 6;
- the port downlink protocol packet will be sequentially directed to the MSS-400 server port 0, according to the No. 0 table configuration of the BX-008-0 switch, the port downlink protocol The packet will be directed to ports 0 to 7 of the BX-008-0 switch in turn; and, items 0x0009 to 0x0010 of the address information table in the MSS-400 server are configured to:
- the next available address is 0x0011;
- S ll, STB-0 receives the port downlink protocol packet from the port 0 of the BX-008-0 switch (that is, the port downlink protocol packet whose destination address is 0x8000 0x0000 0x0000 0x0009), and sends the port uplink protocol packet after receiving the port downlink protocol packet.
- the DA of the packet is 0x0800 0x0000 0x0000 0x0000, SA 0x0000 0x0000 0x0000 0x0009 (port 0 of the switch);
- the MSS-400 server After receiving the port uplink protocol packet sent by the STB-0 switch, the MSS-400 server knows that the source address (SA) of the uplink protocol packet and the device type know that the port No. 0 of the BX-008-0 is connected to a terminal. Then, the terminal information is found in the registration information table in the server, and the network access command is sent to the terminal (the terminal's access network address is 0x0009);
- STB-0 After receiving the network access command, STB-0 knows that its access network address is 0x0009 and enters the network, and sends a network access command response to the server.
- the MSS-400 server receives the incoming network command response sent by STB-0 and knows that the STB-0 switch has entered the network. Therefore, the 0x0009 item in the address information table is configured as:
- This terminal has an audio and video codec engine, 1 100M network port, the terminal model is STB, and the access network address of the device connected to its network port is 0x0001 (ie BX-008-0) , the uplink and downlink traffic count of its network port is 0;
- the 0x0001 item of the address information table is configured to:
- the access switch has eight downlink 100M network ports defined as port 0 to port 7, and one CPU module interface is defined as port 8, and one uplink 100 Mbps port is defined as 9 No. port, the access switch model is BX-008, the access network address of the device connected to the uplink network port is 0x0000 (ie MSS-400), and the access network address of the device connected to the downlink network port 0 is 0x0009.
- the rest are unassigned, and the uplink and downlink traffic counts of each of its network ports are 0; Afterwards, the MSS-400 server sends a device status query command to this port every second to check whether STB-0 is working normally. When the server does not receive the status query response within 6 seconds, it thinks that STB-0 has been removed from the network. Send the device status query command and continue to send the query packet to the port.
- BX-008-1 will also enter the network, and the access network address is 0x0002; STB-1 will also enter the network, and the access network address is 0x0012.
- the PDU is the information exchange mode between the user terminal and the server.
- the two use the original socket to transmit the PDU.
- the data format is as follows:
- the switch receives the response sent by the 8A01 to the server.
- the code board receives the response sent by the 8A01 to the server.
- the types of data packets defined in the metropolitan area network are four, which are: the sub-city query tag package (the labeled protocol package sent by the metropolitan area server to the node switch and the node server);
- the metropolitan area response tag packet (the tagged protocol packet that is sent by the node switch and the node server to the metropolitan area server);
- the address of the metropolitan area network is 40bit in total. In this paper, it is divided into three layers, which are 8bit, 16bit, and 16bit, and are defined as national network, wide area network, and metropolitan area network. Data transmission between terminals of the same metropolitan area network and the same access network is controlled by the node server of the access network.
- the terminal STB_0 is located in the access network A
- the terminal STB_1 is located in the access network B
- the access network A and the access network B belong to the same metropolitan area network C.
- the implementation process is as follows:
- STB_0 makes a request and STB_1 makes a video call;
- the node server of the access network A finds that it belongs to the access network according to the number of the STB_1.
- the metropolitan area network C's metropolitan area server finds that it belongs to the access network according to the number of STB_1.
- the node server of the access network B finds that the STB_1 is in the access network B according to the number of the STB_1, and the node server of the access network B sends a call menu to the STB_1;
- STB_1 can choose to accept or reject, and the response is sent to the node server of access network B, which is assumed to be accepted;
- the node server of the access network B sends a response to the metropolitan area server of the metropolitan area network C;
- the metropolitan area network server of the metropolitan area network C sends a response to the node server of the access network A;
- the node server of access network A sends a response to STB_0.
- the terminal only interacts with the node server of the access network, the node server interacts with the metropolitan area server of the metropolitan area network, and so on, the metropolitan area server and the local wide area network Wide-area server interaction.
- the datagram type of the metro query packet is "1001 0000" (binary), which is 0x90 (hexadecimal).
- the datagram type of the metropolitan area response packet is "00001001" (binary), which is 0x09 (16).
- Binary the datagram type of the unicast tag packet is "0001 0000” (binary), which is 0x10 (hexadecimal), and the datagram type of the multicast tag packet is "0111 1000" (binary). That is 0x78 (hexadecimal), which requires 4 lookup tables, for example
- Tag lookup table for unicast tag packets defined as table 6 with a size of 64K;
- the tag lookup table of the multicast tag data packet defined as the table No. 7, with a size of 64K; the output of the metro domain query tag packet, the metropolitan area response tag packet, the unicast tag data packet, and the tag lookup table of the multicast tag data packet
- there is also a 16-bit outgoing tag for example, one of the node switches, the MX-4, has four Gigabit optical ports and one CPU module interface. If 4 Gigabit optical ports are defined as ports 0 to 3, and the CPU module interface is defined as port 4, a total of 64k X 21bit (5bit + 16bit) metro query tag packet address lookup table, 64k X 21bit is required.
- the output of the metropolitan area query tag packet lookup table with the entry tag of 0x0001 is "1 0000 0000 00000000", indicating that the packet is directed to port 4 (CPU port), the outbound tag is 0x0000, and the inbound tag is 0x0001.
- the output of the packet lookup table is "0 0011 0000 0011 0000 0000", indicating that the packet is directed to port 0, port 1, the out tag is 0x0300, and so on.
- port 0 enters a packet. Its header data is 0x1056 0x1500 0x0000 0x55aa 0x0056 0x1500 0001 0xaa55 0x0000 0x00001, where DA is 0x1056 0x1500 0x0000 0x55aa, SA is 0x0056 0x1500 0001 0xaa55 Reserved byte is 0x0000, label is 0x0001, Then its packet type is 0x10, and then check the table rule at this time to check the No.
- the metropolitan area server sends a query packet to each port, and the node switch sends a response packet after receiving the query packet (the response includes the device type and device identifier of the switch, which is the inherent information of each switch);
- the metropolitan area server After receiving the response from the node switch, the metropolitan area server knows that the node is connected to a node switch, and then finds the node switch information in the registration information table inside the metropolitan area server, and sends a network access command to the node switch. (telling the metropolitan area network address and label of the switch), the node switch enters the network after receiving the network access command, and sends a network access command response to the metropolitan area server;
- the metropolitan area server After receiving the network access command response from the switch, the metropolitan area server knows that the node switch has entered the network, and then sends a status inquiry packet to the port every second to check whether the node switch works normally, and also to the The other ports of the node switch send the port query packet to check whether other devices are connected under the node switch. If the node switch works normally, a status query response is sent to the metropolitan area server after receiving the status query packet. When the metropolitan area server does not receive the status query response within a certain period of time (such as within 6 seconds), it considers that the node switch has been removed from the network, no longer sends the status query packet, and continues to send the query packet to the port.
- a certain period of time such as within 6 seconds
- the device information table All devices in the metropolitan area network are described by the device information table. Two device types with a te and six device IDs can be used to uniquely identify a device. The same device type has different device information tables to describe, such as a node switch information table and a node server information table.
- the entries of the device information table are composed as follows:
- Device identification 6 bytes. When the device is registered, it is written to the hard disk or flash of the metropolitan area server. After the metropolitan area server is powered on, it is imported into the CPU.
- Device address 2 bytes, the metropolitan area network address assigned by the device.
- the address of the metropolitan area network is 16bit. All the devices in the metropolitan area network have unique metropolitan area network addresses (including metropolitan area servers, node switches, and node servers).
- the CPU module of the metropolitan area server maintains a 16 times of 2 times.
- the table of the square that is, the table of 64K, is called the metropolitan area address information table, and the entries of each table are composed as follows:
- Address occupation descriptor 2 bytes, 0x0000 means that this address is not used, 0x0001 means this address is inactive (the metropolitan area server sends the network access command packet with this address, but does not receive the network access command response), 0x0002 means this address Used (the metropolitan area server is set after receiving the incoming response packet);
- Device type 2 bytes, for example 0x0000 means the metropolitan area server MS-1000, 0x0001 means one of the node switches MX-4, 0x0002 represents one of the node servers MSS-400;
- Device resource description information a number of bytes, for example, the device is a node switch, and includes a metropolitan area network address of a device connected to its network port, and an uplink and downlink traffic count of each network port; if the device is a node server, Then it includes the access network address of the device connected to its network port, the uplink and downlink traffic count of its network port, and so on; all of this information is used to provide decision-making basis for the service process, and this information is modified in each service flow. .
- the metropolitan area query tag describes the connection from the metropolitan area server to the node switch or node server
- the metropolitan area response label describes the connection from the node switch or node server to the metropolitan area server.
- the CPU module of the metropolitan area server maintains another 2nd 16th power table, that is, a 64K table, which is called a metropolitan area protocol label information table, and the entries of each table are composed as follows:
- Tag occupation descriptor 2 bytes, 0x0000 means that the tag is not used, 0x0001 means the tag is inactive (the metro server sends the port query packet with this tag, but does not receive the incoming response packet), 0x0002 indicates the tag Used (the metropolitan area server is set after receiving the incoming response packet);
- Tag descriptor 2 bytes, the metropolitan area network address of the device corresponding to the tag;
- Label routing description information 4 bytes, used to describe the metropolitan area network address and port number of the previous hop switch of the metropolitan area query label packet. The first 2 bytes represent the metropolitan area network address of the previous hop switch, after Two bytes represent the port number of the previous hop switch.
- the metro server has 4 Gigabit optical ports and 1 CPU module interface. If the four Gigabit optical ports are defined as ports 0 to 3, the CPU module interface is defined as port 4, the metropolitan area server model is MS-1000, and the MS-1000 port 0 and port 1 are respectively connected. One MX-4-0 port 2 and port 3, MX-4-0 port 0 is connected to one MSS-400-0, and port 1 is connected to one MSS-400-l.
- the network interaction process is as follows:
- the hardware is initialized, and the configuration file is imported from the hard disk to the CPU memory (for example, registration information of the node switch, registration information of the node server, etc.), and the MS-1000 server initializes the metropolitan area address information table and the metropolitan area.
- the protocol label information table all cleared (indicating that all addresses and labels are unused), the MS-1000 server configures its own metropolitan area network address to be 0x0000, that is, the 0x0000 item of the metropolitan area address information table is configured as follows:
- This metro server has 4 Gigabit optical ports defined as ports 0 to 3, and the CPU module interface is defined as port 4, this node server model is MS-1000, its network port The MAN address of the connected device is not allocated, and the uplink and downlink traffic of each network port is counted as 0; The next available address is 0x0001, the next city i or protocol label is 0x0000;
- Configuration table No. 4 is "0 0000 0000 0000 0000" to " 0 0000 1111 1111 1111", that is, all metropolitan area query tag packet transmissions are closed;
- the MS-1000 server configuration knows that it has 4 Gigabit optical ports, and the next Metropolitan Area Protocol label is 0x0000, so it configures four Table 4 entries as
- the next metropolitan protocol label is 0x0004;
- MS-100G server sends header information to 0x9000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000, 0x9000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0002 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0003
- Port inquiry packet since the packet is exchanged according to the label, it does not matter even if the DA is the same. According to the No. 4 table, the
- the 0x0000 item of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive; • Tag Descriptor: No modification;
- the 0x0001 item of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive
- the 0x0002 item of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive
- Item 0x0003 of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive
- the next available tag is 0x0004;
- Configuration No. 5 is "0 0000 0000 0000 0000" to " 0 0000 1111 1111 1111", that is, all metropolitan area response label packet transmissions are closed;
- topology map MX-4-G switch port 3 receives the query packet of the metropolitan area protocol label 0x0001, then
- Send 2 response packets (the response contains the device type of the switch, the device ID, and the port number of the received query packet).
- the header of a packet is 0x0900 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 , in the packet Indicate that the port number of the query packet received is 2;
- the node switch compares the device identifier in the response packet with the device identification item in the device information table of the node switch, until the same is the same to indicate that the device is registered, and the device status item is checked. 0x0000, know that this device is not connected to the network;
- the MS-1000 server According to the 5th field number in the response packet PDU (indicating the switch port number of the received query packet), the MS-1000 server knows that port 0 is connected to port 2 of a switch.
- the packet header is 0x9000 0x0000 0x0001 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000;
- the 0x0001 of the address information table is configured as follows: • Address occupation descriptor: 0x0001 indicates that this address is inactive (the metropolitan area server sends the network access command packet with this address, but does not receive the network access command response);
- the entries of the corresponding device information table are configured as follows:
- Device status: 0x0001 indicates that the device is waiting for access to the network (the metropolitan area server sent the network access command packet, but did not receive the network access command response);
- the node switch According to the device type in the response packet, it is known that the node switch compares the device identifier in the response packet with the device identification item in the device information table of the node switch, until the same is the same to indicate that the device is registered, and the device status item is checked. 0x0001, know that this device is waiting to enter the network;
- the last hop switch is the MS-1000 server (address 0x0000) and the port number is 1;
- the MS-1000 server According to the 5th field number in the response packet PDU (indicating the switch port number of the received query packet), the MS-1000 server knows that port 1 is connected to port 3 of a switch.
- the packet header is 0x90000x0000 0x0001 0x00000x0000 0x0000 0x00000x0000 0x0000 0x0000 0x0001;
- the 0x0001 of the address information table is configured as follows:
- Address occupation descriptor: 0x0001 indicates that this address is inactive (the metropolitan area server sends the network access command packet with this address, but does not receive the network access command response);
- the entries of the corresponding device information table are configured as follows: • Equipment identification: no modification;
- Device status: 0x0001 indicates that the device is waiting for access to the network (the metropolitan area server sent the network access command packet, but did not receive the network access command response);
- MX-4-0 switch No. 2 port receives the access protocol packet of the metropolitan area protocol label 0x0000 (the head of the packet is 0x9000 0x0000 0x0001 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000), after comparing the device type and device Identifies that I know that my metropolitan area network address is 0x0001 and I enter the network. At the same time, I send a network access command response to the server.
- the headers of the packets are 0x0900 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001 0x0000 0x0000 0x0000 0x0000;
- MX-4-0 switch port 3 receives the network protocol packet 0x0001 of the metropolitan area protocol label (the head of the packet is 0x9000 0x0000 0x0001 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001), after comparing the device type, The device ID, knowing that its MAN address is 0x0001, enters the network, and sends a network access command response to the server.
- the headers of the packets are 0x0900 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001 0x0000 0x0000 0x0000 0x0001;
- S 1 MS-1000 server No. 0 port receives the metropolitan area protocol label 0x0000 network access command response packet
- MS-1000 server According to the network access command response packet PDU field number 9 (labeling the switch port number of the received query packet) MS-1000 server knows that port 0 is connected to port 2 of a switch;
- the metropolitan area address of the switch is 0x0001.
- the 0x0001 of the address information table is configured as follows:
- Device resource description information 4 Gigabit optical ports are defined as ports 0 to 3, and the CPU module interface is defined as port 4; its port 2 is connected to a MS-1000 with a metro address of 0x0000. On port 0, the metropolitan area network address of the device connected to other network ports is unknown, and the uplink and downlink traffic counts of each of its network ports are 0.
- the 0x0000 item of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0002 indicates that this tag is used
- the entries of the corresponding device information table are configured as follows:
- Device status: 0x0002 indicates that the device has entered the network (the metropolitan area server has sent the network access command packet and received the network access command response);
- the 0x0000 item of the metro address information table is configured as follows:
- This metro server has 4 Gigabit optical ports defined as ports 0 to 3, and the CPU module interface is defined as port 4, this node server model is MS-1000, its 0 The port is connected to port MX-4-0 of the metropolitan area address 0x0001. The metropolitan area network address of the device connected to the other network port is not allocated, and the uplink and downlink traffic count of each network port is 0.
- the device status query command will be sent to port 0 periodically (for example, every second). If the MS-1000 server does not receive the status query response within a certain period of time (such as 6 seconds), the device status query command will not be sent, and the port will continue to be sent to the port. 0 sends the query packet.
- the port 1 of the MS-1000 server After receiving the network access command response packet of the metropolitan area protocol label 0x0001, the port 1 of the MS-1000 server receives the network access command response packet. 1) According to the metropolitan area protocol label 0x0001 in the network access command response packet, check the label routing description information of the 0x0001 item of the label information table to know that the switch knows that the last hop switch is the MS-1000 server (address is 0x0000), the port number Is number 1;
- the MS-1000 server According to the ninth field number of the incoming packet PDU (indicating the switch port number of the received query packet), the MS-1000 server knows that port 1 is connected to port 3 of a switch.
- the metropolitan area address of the switch is 0x0001.
- the 0x0001 of the address information table is configured as follows:
- Device resource description information 4 Gigabit optical ports are defined as ports 0 to 3, and the CPU module interface is defined as port 4; its port 2 is connected to a MS-1000 with a metro address of 0x0000. Port 0, its port 3 is connected to port 1 of MS-1000 with metro address 0x0000. The address of the metropolitan area network of the device connected to other network ports is unknown, and the uplink and downlink traffic of each network port is counted. Is 0.
- the 0x0001 item of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0002 indicates that this tag is used
- the entries of the corresponding device information table are configured as follows:
- Device status: 0x0002 indicates that the device has entered the network (the metropolitan area server has sent the network access command packet and received the network access command response);
- the 0x0000 item of the metro address information table is configured as follows:
- This metro server has 4 Gigabit optical ports defined as ports 0 to 3, and the CPU module interface is defined as port 4, this node server model is MS-1000, its 0 The port is connected to the MX-4-0 port 2 of the metropolitan area address 0x0001, and the port 1 is connected to the MX-4-0 port 3 of the metropolitan area address 0x0001, and the devices connected to other network ports The metropolitan area network address is not allocated, and the uplink and downlink traffic counts of each of its network ports are 0;
- the device status query command will be sent to port 1 at regular intervals (for example, every second). If the MS-1000 server does not receive the status query response within a certain period of time (such as 6 seconds), it will not send the device status query command and continue to the port. 1 Send the query package.
- MS-1000 server knows that port 0 is connected to port 2 of MX-4-0 with metro address 0x0001, port 1 is connected to port 3 of MX-4-0, MX-4-0 Ports 0 and 1 are unknown, and the next metropolitan protocol label is 0x0004. So it configures the four Table 4 entries as
- the next metropolitan area protocol label is 0x0008.
- the MS-1000 notifies the MX-4-0 by using the label 0x0000 or 0x0001, and configures the entries of the MX-4-0 table 4:
- MS-1000 server sends header information to 0x9000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0004, 0x9000 0x0000
- Item 0x0004 of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive
- Label route description information 0x0001 (the metropolitan area network address of the last-hop switch is the metropolitan area network address of MX-4-0), 0x0000 (port 0 of MX-4-0).
- Item 0x0005 of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive; • Tag Descriptor: No modification;
- Label route description information 0x0001 (the metropolitan area network address of the last-hop switch is the metropolitan area network address of MX-4-0), 0x0001 (port 1 of MX-4-0).
- Item 0x0006 of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive
- Label route description information 0x0001 (the metropolitan area network address of the last-hop switch is the metropolitan area network address of MX-4-0), 0x0000 (port 0 of MX-4-0).
- Item 0x0007 of the tag information table is configured as follows:
- Tag Occupation Descriptor 0x0001 indicates that this tag is inactive
- Label route description information 0x0001 (the metropolitan area network address of the previous hop switch is the metropolitan area network address of MX-4-0), 0x0001 (port 1 of MS-1000).
- the next available tag is 0x0008;
- the switch initializes the hardware after power-on. Since the node server is the initiator or the terminating end of the tag, there is no need to replace the tag;
- the MSS-400-0 switch receives the query packet of the metropolitan area protocol label 0x0004 and 0x0006 on the port 10, then:
- Send 2 response packets (the response contains the device type of the switch, the device ID, and the port number of the received query packet).
- the header of a packet is 0x0900 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0004 , in the packet Indicate that the port number of the query packet received is 10;
- the header of another packet 0x0900 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0006, and the port number of the received query packet is marked as 10 in the packet;
- the MSS-400-1 switch port 10 receives the query packet of the metropolitan area protocol labels 0x0005 and 0x0007, then:
- Send 2 response packets (the response contains the device type of the switch, the device ID, and the port number of the received query packet).
- the header of a packet is 0x0900 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0005, in the packet Indicate that the port number of the query packet received is 10;
- this metro server has 4 Gigabit optical ports and 1 CPU module interface. If the four Gigabit optical ports are defined as ports 0 to 3, the CPU module interface is defined as port 4, the metropolitan area server model is MS-1000, and the MS-1000 port 0 and port 1 are respectively connected. One MX-4-0 port 2 and port 3, MX-4-0 port 0 is connected to one MSS-400-0, and port 1 is connected to one MSS-400-l.
- Terminal STB-G is connected to port 0 of MSS-400-G
- terminal STB_ 1 is connected to port 1 of MSS-400-1
- their address after access is STB_ 0 ( 0x0000 0x0000 0x0002 x0009 ), STB-1 ( 0x0000 0x0000 0x0003 0x0012)
- the metropolitan area network address of MX-4-0 is 0x0001
- STB_ 0 sends an application to MSS-400-0 for visual communication with STB_1.
- the steps are as follows: 51, STB-0 issued a service request instruction packet, the package DA 0x0800 0x0000 0x0002 0x0000, SA 0x0000 0x0000 0x0002 0x0009, reserved 0x0000, PDU part see Appendix, the service parameter is SERVICE_TYPE_TELEPHONE_REQUEST or SERVICE_TYPE_TELEPH0NE_DIRECT o
- the service application instruction package is directed to MSS-400-0 according to the configuration of Table 1, MSS-400-0 judges the application for receiving visual communication according to the contents of the package; according to SA, it is STB_0, (assuming the bandwidth of the videophone) It is 6Mbit/s for uplink and downlink, and 80Mbit/s for uplink and downlink bandwidth of STB_0 and MSS-400-0. Check that the uplink and downlink bandwidths of STB_0 and MSS-400-0 are found to meet the service requirements, and then continue to jump to S4. Otherwise, Jump to S3.
- MSS-400-0 sends a menu to the calling party STB_0, indicating that the service is rejected; to the STB_0: packet DA 0x80000x00000x0002 0x0009, SA 0x0000 0x0000 0x0002 0x0000, reserved 0x0000, PDU section see Appendix menu data format.
- the MSS-400-0 knows that the called party is not in its own access network according to the called number CAM table (content-address mapping table), so the MSS-400-0 sends a service request instruction packet to the metropolitan area server MSS-1000.
- Package DA 0x0900 0x0000 0x0000 0x0000, SA 0x00000x00000x00020x0009, reserved 0x0000, cut, negotiated label is 0x0005
- the service parameter is SERVICE_TYPE_TELEPHONE_REQUEST or SERVICE_TYPE_TELEPH0NE_DIRECT o
- MSS-1000 receives the MSS-400-0 service application package and judges the application for receiving visual communication according to the content of the package; according to SA, it is the terminal under MSS-400-0, (assuming MX-4-0 And the MSS-400-0 has 800 Mbit/s left and right bandwidth;) According to the called number, the CAM table (content-address mapping table) knows that the called party is under the access network of MSS-400-1 (false
- MX-4-0 and MSS-400-1 have 800 Mbit/s left and right bandwidth. Check the upstream and downstream bandwidths of MX-4-0, MSS-400-0, and MSS-400-1 to meet the service requirements. Continue to jump to S7, otherwise jump to S6.
- MSS-1000 sends a service rejection packet to MSS-400-0.
- Package DA 0x9000 0x00000x00020x0009
- SA 0x00000x00000x00000x0000
- reserved 0x0000 the protocol label is 0x0005
- the PDU part is ignored
- the MSS-400-0 receives the service rejection packet and jumps to S3.
- the MSS-1000 sends a service request packet to the MSS-400-1, and issues a service request instruction packet.
- the data format definition of the network access process) the service parameter is SERVICE_TYPE_TELEPHONE_REQUEST or SERVICE_TYPE_TELEPH0NE_DIRECT o
- MSS-400-1 receives the service application package of MSS-1000, judges the application for receiving visual communication according to the content of the package; and checks the CAM table (content-address mapping table) according to the called number to know that the called party is STB_1 (Assume that the uplink and downlink bandwidths of STB_1 and MSS-400-1 are 80 Mbit/s left.) Check that the uplink and downlink bandwidths of STB_1 and MSS-400-1 meet the service requirements, and then continue to jump to S10, otherwise skip to S9.
- CAM table content-address mapping table
- MSS-400-1 sends a menu called, respectively, waiting for the called party to answer;
- STB-1 receives the menu, issues the application SERVICE_TYPE_PERMISSION to accept the communication, the package DA 0x0800 0x0000 0x0003 0x0000, SA 0x0000 0x0000 0x0003 0x0012, reserved 0x0000, (the PDU part see the data format definition of the city i or network access network process), service parameters Is SERVICE_TYPE_PERMISSI0N o
- MSS-400-1 receives the response packet of STB-l, the sending service allows packet to MSS-1000, the packet DA 0x90000x00000x00000x0000, SA 0x00000x0000 0x0003 0x0000, reserved 0x0000, the protocol label is 0x0006, the PDU part is ignored.
- the MSS-1000 When the MSS-1000 receives the service permission packet, it assigns a unicast label (assuming the MSS-400-0 to MSS-400-1 inbound label, the outgoing label is 0x0000, MSS-400-1 to MSS-400-0) Inbound label, outgoing label is 0x0001); The MSS-1000 sends a label distribution package to the MX-4-0.
- the MSS-1000 sends a label distribution package to the MSS-400-0.
- the package DA 0x9000 0x0000 0x0002 0x0000, SA 0x0000 0x0000 0x0000, reserved 0x0000, the protocol label is 0x0005, and the PDU part contains the inbound label, the outgoing label and the navigation port. Contains bindings for DAs, SAs, and tags;
- the MSS-1000 sends a label distribution package to the MSS-400-1.
- the package DA 0x9000 0x0000 0x0003 0x0000, SA 0x0000 0x0000 0x0000, reserved 0x0000, the protocol label is 0x0006, and the PDU part contains the inbound label, the outgoing label, and the navigation port. Contains bindings for DAs, SAs, and tags;
- MX-4-0 receives the label allocation package to update its No. 6 table
- the 0x0000 item is: the outgoing label is 0x0000
- the guiding port is port 1
- the 0x0001 item is: the outgoing label is 0x0001, the guiding port is 0 port.
- MSS-400-0 receives the label allocation package to update its DA, SA and label binding CAM table (address-tag binding table), that is, the 0x0000 item of the CAM table is: DA 0x1000 0x0000 0x0003 0x0012 SA 0x0000 0x0000 0x0002 0x0009;
- the 0x0000 items are: the outgoing label is 0x0000, and the leading port is port 10;
- MSS-400-0 configures its own No. 2 table as follows:
- S16, MSS-400-1 receives the label allocation packet to update its DA, SA and label binding CAM table, that is, the 0x0001 item of the CAM table is: DA 0x10000x00000x00020x0009 SA 0x0000 0x0000 0x0003 0x0012;
- the 0x0001 entries are: the outgoing label is 0x0001, and the leading port is port 10;
- MSS-400-1 configures its own No. 2 table as follows:
- the following codec command packets are respectively directed to STB-0, STB-L STB-0, and STB-1 to start encoding and decoding according to the contents of the packet, and receive and transmit unicast data.
- the DA of the packet sent by STB-0 to STB-1 is 0x1000 0x0000 0x0003 0x0012 SA is 0x0000 0x0000 0x0002 0x0009;
- the packet enters MSS-400-0, and the switching engine of MSS-400-0 checks that the metropolitan area network address of the DA is not the access network. Check the CAM table bound to the DA, SA, and label to obtain the unicast label. 0x0000, then check the 0x0000 item of the 6th table to get the label 0x0000, the guiding port is the 10th port, and add the label 0x0000 to the transmitting end of the 10th port, that is, the head of the packet is 0x1000 0x0000 0x0003 0x0012 0x0000 0x0000 0x0002 0x0009 0x0000 0x0000 0x0000;
- the package enters MX-4-0, and the exchange engine of MX-4-0 looks up the table according to the combined address field.
- the table is checked, that is, the address of the table is "110 0000 0000 0000", and the data is based on MX-
- the unicast label packet with the unicast label of 0-00000 of the 4-0 table is directed to port 1 and the outgoing label is 0x0000, that is, the head of the packet is 0x1000 0x0000 0x0003 0x0012 0x0000 0x0000 0x0002 0x0009 0x0000 0x0000 0x0000;
- the receiving module that enters port 10 of MSS-400-1 removes the label and enters the switching engine.
- the switching engine of MSS-400-1 looks up the table according to the combined address field. The table is checked, that is, the address of the table is "10 0000 0000 0001 0010", according to the configuration of MSS-400-1 No. 2 table, knowing that the output of this entry is "00 0000 0010" means that the downstream port 1 is opened, so the packet enters STB-1;
- the DA of the same STB-1 packet sent to STB-0 is 0x1000 0x0000 0x0002 0x0009 SA 0x0000 0x0000 0x0003 0x0012 ;
- the packet enters the MSS-400-1, and the switching engine of the MSS-400-1 checks that the MAN address of the DA is not the access network.
- the package enters the MX-4-0, MX-4-0 switching engine according to the combined address field lookup table, check the table No. 6, that is, the address of the table is "110 0000 0000 0001", according to MX-4-
- the unicast label packet with the unicast label of 0 in the No. 6 table of 0 is directed to port 0.
- the outbound label is 0x0001, that is, the header of the packet is 0x1000 0x0000 0x0002 0x0009 0x0000 0x0000 0x0003 0x0012 0x0000 0x0000 0x0001;
- the receiving module that enters port 10 of MSS-400-0 removes the label and enters the switching engine.
- the switching engine of MSS-400-0 searches the table according to the combined address field, and checks the table No. 2, that is, the address of the table is "10 0000 0000 0000 1001", according to the configuration of MSS-400-G No. 2 table, knowing that the output of this entry is "00 0000 0001" means that the downstream port No. 0 is opened, so the packet enters STB-0.
- the PDU is the information exchange mode between the user terminal and the server. Both use the raw socket ( Raw Socke t ) to deliver the PDU.
- the data format is as follows:
- the node switch and the node server receive the response sent by the 9A01 to the server.
- the manner in which the node server is connected to the metropolitan area network is only a preferred embodiment of the present invention.
- the node server adopts any prior art network access mode.
- the node server may be in the manner of an IP node to enter the metropolitan area network, that is, the metropolitan area network is an IP network structure, and may be arbitrarily used by those skilled in the art according to actual conditions, and the present invention does not need to be limited thereto.
- the node server can also independently control a local area network, and the node server at this time does not need to access the network, and the access switch and the terminal under the access node can access the local area network controlled by the node server.
- the advantages of the embodiments of the present invention are further described below by comparison with the IP Internet:
- the address of the IP Internet is told by the user equipment to the network; the novel network address of the present invention is told by the network to the user equipment.
- the novel network of the present invention creates an ordered structure "Digital Address System (D/SCAF) with color.
- D/SCAF Digital Address System
- the novel network address of the present invention is not only unique, but also has a positionable and determinable function, like a personal identification number. Similarly, other features of the user port's geographic location, device nature, service rights, etc. are implicit.
- the novel network switch of the present invention specifies the behavior rules of the packet according to these characteristics, and implements data offloading of different natures.
- Each service issues an independent pass to block the hacker attack and the spread of the virus; the IP Internet can freely enter and exit, and the user has its own firewall; the new network of the present invention must apply for a pass for each service.
- the premise that the node server can issue independent passes for each service is that the node server knows the address of each service terminal and knows the path topology that each service packet needs to pass.
- the communication protocol Since the communication protocol is executed at the user terminal, it may be tampered with. Since routing information is broadcast on the network, it may be eavesdropped. The inherent flaws in address spoofing, anonymous attacks, mail bombs, teardrops, covert monitoring, port scanning, internal intrusion, and altered information in the network provide space for hackers. Internet pollution such as spam is difficult to prevent.
- IP Internet users can set up any IP address to impersonate others, they can send probes to any device on the network to spy on other people's information, and can also send arbitrary interference packets (pollution water) to the network.
- many smart people have invented various firewalls and tried to stay alone. However, installing a firewall is voluntary, the effect of the firewall is temporary and relative, and the IP Internet itself will never be clean. This is the second security failure of the IP Internet.
- the network switch After the novel network user of the present invention enters the network, the network switch only allows the user to issue a limited service request to the node server (because the addresses of the respective access network devices are all allocated by the node server), and all other data packets are closed. If the node server approves the user application, it sends a network passport to the switch where the user is located. If each data packet sent by the user terminal does not meet the audit conditions of the network switch, it will be discarded, completely eliminating hacker attacks. The pass is automatically revoked after each service. The pass mechanism is performed by the switch and is not within the user controllable range: Review the source address of the user data packet: Prevent users from sending any fake or anonymous data packets (automatically set after entering the network)
- Audit target address Users can only send packets to the server-specified object (determined when the service is applied)
- Audit data traffic User sent data traffic must comply with server regulations (determined at service request)
- the novel network of the invention does not need negative means such as firewall, antivirus, encryption, internal and external network isolation, etc.
- the novel network of the invention completely blocks the path of hacker attack and virus diffusion, and is a security network which can be relied on in essence.
- the network device is completely isolated from the user data, cutting off the lifeline of viruses and Trojans;
- the IP internet device can arbitrarily disassemble the user data packet; the novel network device of the present invention is completely isolated from the user data. That is, in data transmission, the new network device (for example, switch, gateway, etc.) does not disassemble the user data packet, but directly searches for the mapping table according to the address of the data packet, and forwards it from the corresponding port. That is, the switch of the present invention does not have its own function of calculating and selecting routes.
- the new network device for example, switch, gateway, etc.
- the computer created by Von Neumann puts the program instructions and operational data in the same place, that is, a program can modify other programs and data in the machine.
- This computer model which has been used to this day, has left a chance for Trojan horses, worms, viruses, backdoors, and so on. With the rapid accumulation of viruses, anti-virus software and patches are always slow and passive.
- IP Internet TCP/IP protocol The core technology of the Internet TCP/IP protocol is best effort, store and forward, and error detection retransmission.
- network servers and routers In order to realize the mission of the Internet, network servers and routers must have the ability to resolve user data packets. This leaves a way for hacker viruses. Network security has become smarter than anyone else, and there is no peace. This is the third genetic flaw in the IP Internet.
- the CPU in all the servers and switch devices of the novel network of the present invention access any one of the user data packets. That is to say, the entire novel network of the present invention is only a transparent pipeline for establishing a complete isolation and traffic behavior specification between the service provider and the receiver terminal device. Regardless of what data is sent or received by the user terminal, it is irrelevant to the network. The lifeline of viruses and Trojans has been structurally cut off. Therefore, the novel network of the present invention eliminates the possibility of unrelated persons on the network stealing user data. Similarly, those who want to be hackers or drug makers have no object at all.
- the IP Internet is a free market with no middlemen; the new network of the present invention is a department store with a middleman. For the network, both consumers and content providers belong to the network user category, but the size is different.
- the IP Internet is an unmanaged free market where direct communication (P2P) is possible between any user. That is to say, whether or not to manage is the user has the final say, whether or not the charge is a single large user (supplier) has the final say, whether or not to comply with the regulations is also a single large user (vampire website) has the final say. Operators can only accept admission fees at most. It is only impossible to implement legal, ethical, security and business rules. It is impossible now and in the future. This is the fourth structural disability of the IP Internet.
- the novel network of the present invention creates a service node concept and forms a managed department store business model. Between users, or between consumers and suppliers, there is absolutely no free access, and all connections must be approved by the node server (intermediate). This is a necessary condition for effective management of network services. In order to become a new type of network user, you must first negotiate your role with the network operator. From ordinary consumers, online stores, school hospitals, government departments, to TV stations, all of them belong to the operators' customers, just like the above departments are all telephones. The company's customers are the same. Although it seems that each character is only sending and receiving video content, how to send and receive must strictly abide by their agreed behavior rules. With insurmountable specifications, the relationships between various types of users can be truly divided into C2C, B2C, B2B, etc., or collectively referred to as managed user-to-user communication (MP2P).
- MP2P managed user-to-user communication
- node servers (intermediaries) can serve is that the node server can know the address of each service terminal and know the path topology that each service packet needs to pass.
- the IP Internet pursues the first communication and post-management mode; the novel network of the present invention adopts the first management and the post-communication mode.
- IP Internet defines management as an additional additional service built on the application layer. Therefore, management naturally becomes a dispensable display. This is the fifth intractable nature of the IP Internet.
- the novel network user terminal of the present invention can only select one of the designated services within the scope of the node server license.
- the protocol signaling during the service establishment process is performed by the node server (without the user's hand).
- the user terminal only passively answers the server's questions, accepts or rejects the service, and cannot participate in the protocol process.
- the data packet can only be sent in the manner specified by the passport. Any packet that deviates from the passport is always discarded in the underlying switch.
- the basic idea of the novel network protocol of the present invention is to implement a business model centered on service content, rather than simply completing a simple data exchange. In this mode, security is an inherent property of the new network, not an additional service item attached to the network. Of course, business authority review, resource verification, and billing procedures can all be easily included in the management contract.
- the device embodiment of the access network device, a node server, and an access switch are basically corresponding to the foregoing method embodiments. For details, refer to the related description in the foregoing method embodiment. I won't go into details.
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