CN110691058A

CN110691058A - Data transmission method and device

Info

Publication number: CN110691058A
Application number: CN201810724965.3A
Authority: CN
Inventors: 刘蒙; 王艳辉; 韩杰; 彭宇龙
Original assignee: Visionvera Information Technology Co Ltd
Current assignee: Visionvera Information Technology Co Ltd
Priority date: 2018-07-04
Filing date: 2018-07-04
Publication date: 2020-01-14

Abstract

The invention provides a data transmission device and a data transmission method. Wherein the device includes: the first internet access is used for connecting equipment of the video network; the second network port is used for connecting equipment of other networks; an ARM processor comprising: the first MAC interface is used for connecting a first network port; the second MAC interface is used for connecting a second network port; the conversion module is used for performing first protocol conversion on first data if the first data sent by the video networking equipment through the first internet access and the first MAC interface is received; if second data sent by equipment of other networks through a second internet access and a second MAC interface is received, second protocol conversion is carried out on the second data; the sending module is used for sending the data after the first protocol conversion to the equipment of other networks through the second MAC interface and the second network port if the first protocol conversion is carried out; and if the second protocol conversion is carried out, the data after the second protocol conversion is sent to the equipment of the video network through the first MAC interface and the first internet access. The invention has low cost and low power consumption.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of video networking technologies, and in particular, to a data transmission method and a data transmission apparatus.

Background

With the rapid development of network technologies, bidirectional communications such as video conferences and video teaching are widely popularized in the aspects of life, work, learning and the like of users. In the communication process, the two communication parties are located in the same type of network, such as the internet, so that communication can be performed based on the same network protocol.

However, if communication is required between devices located in different networks, the devices of both parties cannot correctly process data from the devices of the other party due to the difference in the networks, and communication cannot be smoothly achieved. Therefore, how to realize communication between devices located in different networks becomes an urgent problem to be solved.

Disclosure of Invention

In view of the above problems, embodiments of the present invention are proposed to provide a data transmission method and a corresponding data transmission apparatus that overcome or at least partially solve the above problems.

In order to solve the above problem, an embodiment of the present invention discloses a data transmission device 1, which is applied to a video network, and the device includes:

the first internet access is used for connecting equipment of the video network;

the second network port is used for connecting equipment of other networks except the video network;

an ARM processor, the ARM processor comprising:

the first MAC interface is used for connecting the first internet access;

the second MAC interface is used for connecting the second network port;

the conversion module is used for performing first protocol conversion on first data if the first data sent by the equipment of the video network through the first internet access and the first MAC interface is received; if second data sent by the equipment of the other network through the second internet access and the second MAC interface is received, second protocol conversion is carried out on the second data;

a sending module, configured to send the data after the first protocol conversion to the device of the other network via the second MAC interface and the second network port if the conversion module performs the first protocol conversion; and if the conversion module performs second protocol conversion, sending the data after the second protocol conversion to the equipment of the video network through the first MAC interface and the first internet access.

Preferably, the conversion module comprises: a first conversion unit for converting first data based on the video networking protocol into data based on the other network protocol; and the second conversion unit is used for converting the second data based on the other network protocol into the data based on the video networking protocol.

Preferably, the second conversion unit is specifically configured to convert the second data based on the other network protocol into data based on the video networking protocol and including path information; the path information is used for identifying a transmission path of the data when the data is transmitted in the video network.

Preferably, the apparatus further comprises: the first PHY chip is used for connecting the first internet access and the first media independent interface; a first media independent interface for connecting the first PHY chip and the first MAC interface; the second PHY chip is used for connecting the second internet access and the second media independent interface; and the second media independent interface is used for connecting the second PHY chip and the second MAC interface.

Preferably, the first and second network ports are both RJ45 network ports, and the first and second media independent interfaces are both RGMII interfaces.

Preferably, the other networks include the internet and private networks.

On the other hand, the embodiment of the invention also discloses a data transmission method, which is applied to a video network, wherein equipment of the video network is connected with the ARM processor through a first internet access and a first MAC interface, and equipment of other networks except the video network is connected with the ARM processor through a second internet access and a second MAC interface, and the method comprises the following steps:

if the ARM processor receives first data sent by the equipment of the video network through the first internet access and the first MAC interface, first protocol conversion is carried out on the first data; if second data sent by the equipment of the other network through the second internet access and the second MAC interface is received, second protocol conversion is carried out on the second data;

if the ARM processor carries out first protocol conversion, the data after the first protocol conversion is sent to the equipment of other networks through the second MAC interface and the second internet access; and if the second protocol conversion is carried out, sending the data after the second protocol conversion to the equipment of the video network through the first MAC interface and the first internet access.

Preferably, the step of performing the first protocol conversion on the first data includes: converting the first data based on the video networking protocol into data based on the other network protocol; the step of performing a second protocol conversion on the second data comprises: converting the second data based on the other network protocol into data based on the video networking protocol.

Preferably, the step of converting the second data based on the other network protocol into the data based on the video networking protocol includes: converting second data based on the other network protocol into data based on the video networking protocol and including path information; the path information is used for identifying a transmission path of the data when the data is transmitted in the video network.

Preferably, the first network port and the second network port are both RJ45 network ports.

In the embodiment of the invention, the data transmission device is provided with a first network port and a second network port, is connected with the equipment of the video network through the first network port and interacts with the equipment of the video network; and connecting the devices of other networks except the video network through the second network port to interact with the devices of other networks. The data transmission device is also provided with an ARM processor, and the ARM processor comprises a first MAC interface connected with the first internet access and a second MAC interface connected with the second internet access; the ARM processor also comprises a conversion module, which is used for performing first protocol conversion on first data if the first data sent by the video networking equipment through the first internet access and the first MAC interface is received; if second data sent by equipment of other networks through a second internet access and a second MAC interface is received, second protocol conversion is carried out on the second data; the sending module is used for sending the data after the first protocol conversion to the equipment of other networks through the first MAC interface and the first internet access if the conversion module carries out the first protocol conversion; and if the conversion module performs second protocol conversion, transmitting the data after the second protocol conversion to the equipment of the video network through the second MAC interface and the second network port. Therefore, the embodiment of the invention can carry out protocol conversion on the data so as to convert the data into the data based on different network protocols, thereby realizing smooth communication among devices of different networks; and the protocol conversion process is realized through the ARM processor, compared with a PC-level or server-level device, the ARM processor is low in cost and power consumption, and the setting of each interface can meet the requirement of network bandwidth.

Drawings

FIG. 1 is a schematic networking diagram of a video network of the present invention;

FIG. 2 is a schematic diagram of a hardware architecture of a node server according to the present invention;

fig. 3 is a schematic diagram of a hardware structure of an access switch of the present invention;

fig. 4 is a schematic diagram of a hardware structure of an ethernet protocol conversion gateway according to the present invention;

fig. 5 is a block diagram of a data transmission apparatus according to a first embodiment of the present invention;

fig. 6 is a block diagram of a data transmission apparatus according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating steps of a data transmission method according to a third embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.

The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.

To better understand the embodiments of the present invention, the following description refers to the internet of view:

some of the technologies applied in the video networking are as follows:

network Technology (Network Technology)

Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network circuit Switching (circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.

Switching Technology (Switching Technology)

The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.

Server Technology (Server Technology)

The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.

Storage Technology (Storage Technology)

The super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.

Network Security Technology (Network Security Technology)

The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.

Service Innovation Technology (Service Innovation Technology)

The unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.

Networking of the video network is as follows:

the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.

As shown in fig. 1, the video network is divided into an access network and a metropolitan network.

The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.

The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.

Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.

The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.

The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.

Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.

The access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.

Video networking device classification

1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: servers, switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.

1.2 wherein the devices of the access network part can be mainly classified into 3 types: node servers, access switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).

The specific hardware structure of each access network device is as follows:

a node server:

as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;

the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding 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 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.

The access switch:

as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;

wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the data packet coming from the CPU module 204 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.

The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:

if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;

if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.

The rate control module 208 is configured by the CPU module 204, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.

The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.

Ethernet protocol conversion gateway：

As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.

Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;

the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, acquires the ethernet MAC DA of the corresponding terminal according to the video networking destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MACSA of the ethernet coordination gateway, and the ethernet length or frame type, and sends the packet.

The other modules in the ethernet protocol gateway function similarly to the access switch.

A terminal:

the system 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, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.

1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.

2. Video networking packet definition

2.1 Access network packet definition

The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.

As shown in the following table, the data packet of the access network mainly includes the following parts:

DA

SA

Reserved

Payload

CRC

wherein:

the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;

the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);

the reserved byte consists of 2 bytes;

the payload part has different lengths according to different types of data packets, and is 64 bytes if the data packet is a variety of protocol packets, and is 32+1024 or 1056 bytes if the data packet is a unicast data packet, of course, the length is not limited to the above 2 types;

the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.

2.2 metropolitan area network packet definition

The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.

In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.

As shown in the following table, the data packet of the metro network mainly includes the following parts:

DA

SA

Reserved

label (R)

Payload

CRC

Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.

Based on the above characteristics of the video network, the data transmission scheme provided by the embodiment of the invention can realize data transmission between different networks.

Example one

Referring to fig. 5, a block diagram of a data transmission apparatus according to a first embodiment of the present invention is shown. The device can be applied to video networking.

The data transmission apparatus according to the embodiment of the present invention may include a first internet access 501, a second internet access 502, and an ARM processor 503. Each interface and module is described below.

And a first network port 501 for connecting devices of the video network.

The data transmission device of the embodiment of the invention can be connected with the equipment of the video network through the first network port, and can perform data interaction with the equipment of the video network through the first network port. Therefore, the equipment of the video network can send data to the data transmission device through the first network interface, and the data transmission device can send the data to the equipment of the video network through the first network interface. The video network device may include a video network terminal (such as a set-top box, etc.), a video network server, etc.

And a second port 502 for connecting devices of other networks except the video network.

The data transmission device of the embodiment of the invention can be connected with other network devices except the video network through the second network port, and can perform data interaction with other network devices through the second network port. Therefore, the device of the other network can send the data to the data transmission device through the second network interface, and the data transmission device can send the data to the device of the other network through the second network interface. The devices of other networks may include terminals (such as mobile terminals, monitoring devices, etc.) of other networks, routers, and other devices. Other networks may be the internet, private networks for other domain services, etc. The private network of other field services may be a broadcast television network, a telecommunication network, etc.

ARM processor 503, ARM (advanced RISC machines), is a 32-bit Reduced Instruction Set (RISC) processor architecture that is widely used in many embedded system designs. The ARM processor has the characteristics of fixed instruction length, high execution efficiency, low cost and the like.

In this embodiment of the present invention, the ARM processor 503 may include a first MAC (Media Access Control) interface 5031, a second MAC interface 5032, a conversion module 5033, and a sending module 5034.

The first MAC interface 5031 is configured to connect to the first internet access. It should be noted that, here, the connection between the first MAC interface and the first network port is not limited to a direct connection, and those skilled in the art can implement the connection between the first MAC interface and the first network port according to practical experience.

The ARM processor of the embodiment of the invention can be connected with the first internet access through the first MAC interface, and can perform data interaction with the equipment of the video network through the first MAC interface and the first internet access. Therefore, the video network equipment can send data to the ARM processor through the first network port and the first MAC interface in sequence; the ARM processor can sequentially send data to the equipment of the video network through the first MAC interface and the first internet access.

A second MAC interface 5032 configured to connect to the second network port. It should be noted that, here, the connection between the second MAC interface and the second network port is not limited to a direct connection, and those skilled in the art can implement the connection between the second MAC interface and the second network port according to practical experience.

The ARM processor of the embodiment of the invention can be connected with the second network port through the second MAC interface, and can perform data interaction with other network devices through the second MAC interface and the second network port. Therefore, the devices of other networks can send data to the ARM processor through the second network port and the second MAC interface in sequence, and the ARM processor can send data to the devices of other networks through the second MAC interface and the second network port in sequence.

A conversion module 5033, configured to perform a first protocol conversion on first data sent by the video networking device through the first internet access and the first MAC interface if the first data is received; and if second data sent by the equipment of the other network through the second internet access and the second MAC interface is received, performing second protocol conversion on the second data.

A sending module 5034, configured to send, if the conversion module performs the first protocol conversion, the data after the first protocol conversion to the device of the other network via the second MAC interface and the second network port; and if the conversion module performs second protocol conversion, sending the data after the second protocol conversion to the equipment of the video network through the first MAC interface and the first internet access.

When the video network equipment transmits data to other network equipment, the video network equipment sequentially transmits first data to the ARM processor through the first internet access and the first MAC interface, the first data are transmitted to the conversion module of the ARM processor, and the conversion module performs first protocol conversion on the first data after receiving the first data because the video network data cannot be directly transmitted in other networks and the like, so that the first data can be transmitted in other networks. After conversion, the conversion module transmits the data converted by the first protocol to the sending module, and the sending module sends the data converted by the first protocol to the corresponding other network devices through the second MAC interface and the second network port in sequence.

When the device of other network is to transmit data to the device of the video network, the device of other network sequentially sends second data to the ARM processor through the second network port and the second MAC interface, the second data is sent to the conversion module of the ARM processor, and since the data of other network cannot be directly transmitted in the video network and other processing, the conversion module performs second protocol conversion on the second data after receiving the second data, so that the second data is converted into data capable of being transmitted in the video network. After conversion, the conversion module transmits the data converted by the second protocol to the sending module, and the sending module sends the data converted by the second protocol to the corresponding equipment of the video network sequentially through the first MAC interface and the first network port.

The embodiment of the invention can carry out protocol conversion on the data so as to convert the data into data based on different network protocols, thereby realizing smooth communication among devices of different networks; and the protocol conversion process is realized through the ARM processor, compared with a PC-level or server-level device, the ARM processor is low in cost and power consumption, and the setting of each interface can meet the requirement of network bandwidth.

Example two

Referring to fig. 6, a block diagram of a data transmission apparatus according to a second embodiment of the present invention is shown. The device can be applied to video networking.

The data transmission device of the embodiment of the invention may include: a first portal 601, a second portal 602, a first PHY chip 603, a second PHY chip 604, a first media independent interface 605, a second media independent interface 606, and an ARM processor 607. Each interface and module is described below.

And the first internet access 601 is used for connecting the devices of the video network.

And a second portal 602 for connecting devices of other networks than the video network.

Wherein, the first network port and the second network port can be both RJ45 network ports. RJ45 is a type of information jack (i.e., communications outlet) connector in a wiring system, which consists of a plug (connector, crystal header) and a socket (module), the plug having 8 recesses and 8 contacts. RJ is an abbreviation for Registered Jack, meaning "Registered Jack".

The first PHY chip 603 is configured to connect to a first network port and a first media independent interface.

A second PHY chip 604 for connecting to a second network port and a second media independent interface.

PHY refers to a physical layer, and generally refers to a chip that interfaces with external signals. The physical layer defines the electrical and optical signals, line states, clock references, data coding and circuitry, etc. required for data transmission and reception and provides a standard interface to the data link layer devices. The chip of the physical layer is called PHY. The RJ45 interface transmits specially encoded differential analog signals, and electronic devices such as computers do not support direct input of such signals. The PHY chip mainly decodes these analog signals, and transmits digital signals through an interface such as MII (media independent interface). In the decoding process, it only performs signal conversion, and does not perform other processing on the digital signal.

The first media independent interface 605 is used to connect the first PHY chip and the first MAC interface.

And a second media independent interface 606 for connecting a second PHY chip and a second MAC interface.

The MII interface provides an interconnection technique between the MAC interface and the PHY chip. The MII interface mainly comprises four parts: the first is a Data sending interface from the MAC layer to the physical layer, the second is a Data receiving interface from the physical layer to the MAC layer, the third is a state indicating signal from the physical layer to the MAC layer, and the fourth is an MDIO (Management Data Input/Output) interface for transmitting control and state information between the MAC layer and the physical layer.

In a preferred embodiment, the first media independent interface and the second media independent interface may both be RGMII interfaces. RGMII (Reduced Gigabit Media Independent interface) is Reduced GMII (Gigabit Media Independent interface). RGMII uses a 4-bit data interface, operates at 125MHz, and transmits data on both the rising and falling edges, so the transmission rate can reach 1000 Mbps. Meanwhile, the method is compatible with 10/100Mbps working mode specified by MII, and supports the transmission rate of 10M/100M/1000 Mb/s. Network speeds in the giga range can be achieved with RGMII and circuit cost can be reduced, reducing the pin count of devices implementing such interfaces from 25 to 14.

ARM processor 607 includes: first MAC interface 6071, second MAC interface 6072, conversion module 6073, and sending module 6074.

Compared with the first embodiment, the first PHY chip 603, the second PHY chip 604, the first media independent interface 605, and the second media independent interface 606 are added in the embodiment of the present invention. First MAC interface 6071 is used to connect to a first PHY chip and second MAC interface 6072 is used to connect to a second PHY chip.

In the embodiment of the invention, data interaction can be carried out between the ARM processor and the video networking equipment through the first MAC interface, the first media independent interface, the first PHY chip and the first internet access. Therefore, the video network equipment can send data to the ARM processor through the first internet access, the first PHY chip, the first media independent interface and the first MAC interface in sequence; the ARM processor can sequentially send data to the video network equipment through the first MAC interface, the first media independent interface, the first PHY chip and the first internet access.

The ARM processor and other network devices can perform data interaction through a second MAC interface, a second media independent interface, a second PHY chip and a second internet access. Therefore, the device of other network can send the data to the ARM processor sequentially through the second network port, the second PHY chip, the second media independent interface and the second MAC interface; the ARM processor may send data to the devices of other networks through the second MAC interface, the second media independent interface, the second PHY chip, and the second network port in sequence.

A conversion module 6073, configured to perform a first protocol conversion on first data sent by the video networking device through the first internet access and the first MAC interface if the first data is received; if second data sent by the equipment of the other network through the second internet access and the second MAC interface is received, second protocol conversion is carried out on the second data;

when the equipment of the video network transmits the first data to the equipment of other networks, the equipment of the video network sequentially sends the first data to the conversion module in the ARM processor through the first internet access, the first PHY chip, the first media independent interface and the first MAC interface. The first data sent by the equipment of the video network is data based on a video network protocol, and the equipment of the video network sends the first data to the first internet access through the video network.

Since the first data based on the video networking protocol cannot be directly transmitted in other networks, the conversion module performs first protocol conversion on the first data to convert the first data into data capable of being transmitted in other networks. In an embodiment of the present invention, the conversion module includes a first conversion unit, configured to convert first data based on the video networking protocol into data based on another network protocol. The converted data based on other network protocols can be transmitted in other networks.

When the device of the other network is to transmit the second data to the device of the video network, the device of the other network sequentially sends the second data to the conversion module in the ARM processor through the second network port, the second PHY chip, the second media independent interface, and the second MAC interface. The second data sent by the device of the other network is data based on the other network protocol, and the device of the other network sends the second data to the second internet access through the other network. For example, if the other network is the internet, the second data sent by the internet device is data based on an internet protocol, and the internet device sends the second data to the second portal through the internet; if the other network is a private network (such as a broadcast television network, a telecommunication network, etc.), the second data sent by the device of the private network is data based on a private network protocol, and the device of the private network sends the second data to the second internet access through the private network.

Since the second data based on other network protocols cannot be directly transmitted in the video network, the conversion module performs second protocol conversion on the second data to convert the second data into data capable of being transmitted in the video network. In the embodiment of the present invention, the conversion module includes a second conversion unit, configured to convert second data based on another network protocol into data based on an internet of view protocol. The converted data based on the video networking protocol can be transmitted in the video networking.

In a preferred embodiment, the second conversion unit may be specifically configured to convert the second data based on the other network protocol into data based on the video networking protocol and including path information. The path information is used for identifying a transmission path when the data is transmitted in the video network. The path information may include port information of the first MAC interface, port information of the first media independent interface, port information of the first PHY chip, port information of the first network port, and information such as a video networking number of the video networking device to be sent, and a MAC address of the video networking device. And then, the data converted by the second protocol can be transmitted in the video network according to the path information.

A sending module 6074, configured to send, if the conversion module performs first protocol conversion, the data after the first protocol conversion to the device of the other network via the second MAC interface and the second network interface; and if the conversion module performs second protocol conversion, sending the data after the second protocol conversion to the equipment of the video network through the first MAC interface and the first internet access.

If the conversion module performs first protocol conversion on first data sent by the video networking equipment, the conversion module transmits the data after the first protocol conversion to the sending module after the conversion, and the sending module sends the data after the first protocol conversion to other corresponding network equipment through the second MAC interface, the second media independent interface, the second PHY chip and the second network interface in sequence. The second network port sends the data converted by the first protocol to the equipment of other networks through the other networks.

If the conversion module performs second protocol conversion on second data sent by the equipment of other networks, after the conversion, the conversion module transmits the data after the second protocol conversion to the sending module, and the sending module sends the data after the second protocol conversion to the corresponding equipment of the video network sequentially through the first MAC interface, the first media independent interface, the first PHY chip and the first network port. The data converted by the second protocol is data based on the video networking protocol, and the first internet access sends the data converted by the second protocol to the equipment of the video networking through the video networking.

For example, for the application scenario of video surveillance, for example, the other network is the internet, the device on the internet is a network camera, and the device on the internet is a server on the internet. The data transmission device of the embodiment of the invention is connected with the video network server through the first internet access and is connected with the network camera through the second internet access. During monitoring, video data acquired by the network camera is second data based on an internet protocol, the network camera sends the second data to the conversion module in the ARM processor through the second internet access, the second PHY chip, the second media independent interface and the second MAC interface in sequence, and the network camera sends the second data to the second internet access through the internet. The conversion module carries out second protocol conversion on the second data, converts the second data based on the Internet protocol into data based on the video networking protocol, and transmits the data after the second protocol conversion to the sending module. The sending module sends the data converted by the second protocol to a corresponding video network server through the first MAC interface, the first media independent interface, the first PHY chip and the first internet access in sequence, wherein the first internet access sends the data converted by the second protocol to the video network server through the video network. The video network server performs corresponding processing on the received data, for example, the data can be sent to the video network terminal and played by the video network terminal; or the information can be sent to a monitoring management platform, and the monitoring management platform performs integrated analysis and the like.

For another example, for the application scenario of the video conference, for example, the other network is the internet, the device on the internet is the mobile terminal, the device on the video network is the video network server, and the video network server is connected with the video network terminal. The data transmission device of the embodiment of the invention is connected with the video network server through the first internet access and is connected with the mobile terminal through the second internet access. In a video conference, a video networking terminal of a conference speaking party acquires video data or audio data and sends the video data or the audio data to a video networking server through a video networking, the video data or the audio data is first data based on a video networking protocol, the video networking server sends the first data to a conversion module in an ARM processor through a first internet access, a first PHY chip, a first media independent interface and a first MAC interface in sequence, and the video networking server sends the first data to the first internet access through the video networking. The conversion module carries out first protocol conversion on the first data, converts the first data based on the video networking protocol into data based on the Internet protocol, and transmits the data after the first protocol conversion to the sending module. The sending module sends the data converted by the first protocol to the corresponding mobile terminal through the second MAC interface, the second media independent interface, the second PHY chip and the second internet access in sequence, wherein the second internet access sends the data converted by the first protocol to the mobile terminal through the internet. The mobile terminal can decode and play the video.

Fig. 7 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention. The hardware platform of the device adopts a TI AM3354BZCZ main processor based on Cortex-A8 series, the ARM processor comprises two industrial gigabit Ethernet (10/100/1000Mbps) MAC interfaces which can be connected with two gigabit network ports, and is provided with a 512MB DDR3 memory and a 256MB NandFlash memory chip, so that an embedded Linux system can be stably operated. The ARM platform can run a Linux3.2 version inner core, one gigabit network port of the device is connected with a video network, and the other gigabit network port is connected with the Internet or a service private network in other fields. The high-efficiency butt joint of a video networking V2V protocol and a TCP/IP network protocol is realized at a Linux system kernel layer, and data is transmitted to a video networking Internet fusion gateway by utilizing a video networking VPN technology, so that data interaction between the video networking and the Internet is realized.

Two RJ45 ports (gigabit port 1 and gigabit port 2) correspond to the first port and the second port, two Ethernet PHY chips correspond to the first PHY chip and the second PHY chip, two RGMII interfaces correspond to the first MAC interface and the second MAC interface, and two MAC interfaces correspond to the first MAC interface and the second MAC interface, respectively. The master processor AM3354BZCZ may comprise the conversion module and the transmission module described above. The memory DDR3, the flash NandFlash and the SD card can be located in the ARM processor and are mainly used for storing relevant data. The USB interface can be connected with an external USB device, and the RS232 serial port can realize the input of external data into the ARM processor. The power management chip mainly provides power for the main processor AM3354BZCZ, the PHY chip and the like, and the power socket can be connected with an external power supply and the like.

The embodiment of the invention is a new device for simply, safely and quickly integrating and transmitting data on the video network, can meet the application requirement of a video network user for accessing a non-video network (the Internet or other field service private networks and the like), can provide IP data access for the user in the range covered and extended by the video network through the device, and provides a data channel which is safer and more efficient than the traditional network by utilizing the real-time transmission and the structural safety characteristic of the video network. The device establishes a video network VPN transmission tunnel between the device and a video network Internet convergence gateway, realizes the unified access of the video network, the Internet, a broadcast and television network and a telecommunication network through the conversion of a video network V2V protocol and a TCP/IP network protocol, realizes the interconnection and intercommunication of network layers through the device, and realizes the convergence and unification of service layers. Compared with PC-level or server-level hardware equipment with high cost and high energy consumption, the device adopts an ARM platform with relatively low energy consumption and an embedded Linux system with stable operation, is provided with two 10/100/1000M self-adaptive network ports, can meet the bandwidth requirement of matched network equipment, meets the performance requirement of the equipment, and saves cost and energy consumption.

EXAMPLE III

Referring to fig. 8, a flowchart of steps of a data transmission method according to a third embodiment of the present invention is shown, and the method may be applied to a video network. The equipment of the video network is connected with the ARM processor through a first internet access and a first MAC interface, and the equipment of other networks except the video network is connected with the ARM processor through a second internet access and a second MAC interface.

The data transmission method of the embodiment of the invention can comprise the following steps:

step 801, if an ARM processor receives first data sent by the video networking device through the first internet access and the first MAC interface, performing first protocol conversion on the first data; if second data sent by the equipment of the other network through the second internet access and the second MAC interface is received, second protocol conversion is carried out on the second data;

step 802, if the ARM processor performs the first protocol conversion, the ARM processor sends the data after the first protocol conversion to the device of the other network through the second MAC interface and the second network port; and if the second protocol conversion is carried out, sending the data after the second protocol conversion to the equipment of the video network through the first MAC interface and the first internet access.

Preferably, the video network device is connected with the ARM processor through a first network port, a first PHY chip, a first media independent interface, and a first MAC interface; and the equipment of other networks except the video network is connected with the ARM processor through a second internet access, a second PHY chip, a second media independent interface and a second MAC interface.

Preferably, the other networks include the internet and private networks.

It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

As for the method embodiment, since it is basically similar to the apparatus embodiment, the description is simple, and the relevant points can be referred to the partial description of the apparatus embodiment.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The data transmission method and the data transmission device provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A data transmission apparatus, wherein the apparatus is applied in a video network, the apparatus comprising:

an ARM processor, the ARM processor comprising:

the first MAC interface is used for connecting the first internet access;

the second MAC interface is used for connecting the second network port;

2. The apparatus of claim 1, wherein the conversion module comprises:

a first conversion unit for converting first data based on the video networking protocol into data based on the other network protocol;

and the second conversion unit is used for converting the second data based on the other network protocol into the data based on the video networking protocol.

3. The apparatus of claim 2,

the second conversion unit is specifically configured to convert second data based on the other network protocol into data that is based on the video networking protocol and includes path information; the path information is used for identifying a transmission path of the data when the data is transmitted in the video network.

4. The apparatus of claim 1, further comprising:

the first PHY chip is used for connecting the first internet access and the first media independent interface;

a first media independent interface for connecting the first PHY chip and the first MAC interface;

the second PHY chip is used for connecting the second internet access and the second media independent interface;

and the second media independent interface is used for connecting the second PHY chip and the second MAC interface.

5. The apparatus of claim 4, wherein the first and second ports are both RJ45 ports, and the first and second media independent interfaces are both RGMII interfaces.

6. The apparatus of claim 1, wherein the other networks comprise the internet and a private network.

7. A data transmission method is applied to a video network, equipment of the video network is connected with an ARM processor through a first internet access and a first MAC interface, and equipment of other networks except the video network is connected with the ARM processor through a second internet access and a second MAC interface, and the method comprises the following steps:

8. The method of claim 7,

the step of performing a first protocol conversion on the first data comprises: converting the first data based on the video networking protocol into data based on the other network protocol;

the step of performing a second protocol conversion on the second data comprises: converting the second data based on the other network protocol into data based on the video networking protocol.

9. The method of claim 8, wherein the step of converting the second data based on the other network protocol into the data based on the video networking protocol comprises:

converting second data based on the other network protocol into data based on the video networking protocol and including path information; the path information is used for identifying a transmission path of the data when the data is transmitted in the video network.

10. The method of claim 7, wherein the first and second ports are both RJ45 ports.