TWI407727B - A Method and System of Data Transmission Based on Peer - to - Peer P2P - Google Patents

Abstract

A system and a method for peer-to-peer (P2P) communication are provided. It establishes a peer-to-peer (P2P) connection between the sender and the recipient in advance. The method comprises: (A) the sender according to the type of the transmission data makes an identification tag to said transmission data, and according to said peer-to-peer (P2P) connection sends the identified transmission data to the recipient with at least one type of the transmission data; and (B) the recipient analyzes the transmission data to acquire the identification tag of the transmission data, and, according to the corresponding type of the identification tag, processes the transmission data. The present invention also provides a P2P data communication system. which can significantly save cost and ensure smooth audio and visual communication.

Description

Data transmission method and system based on point-to-point P2P

The present invention relates to the field of point-to-point (P2P) technology, and more particularly to a P2P-based data transmission method and system.

P2P originated from the initial Internet communication method, such as connecting personal computers (PCs) in a building through a regional network, and dialing interconnections between different buildings through modems. The communication mode built on the Transmission Control Protocol (TCP)/Internet Protocol (IP) protocol forms the basis of today's Internet. Therefore, from the perspective of basic technology, P2P is not a new technology, but a new application technology model. Although the research on P2P has never stopped, today P2P is once again concerned mainly because of the emergence of shared software such as Napster and instant messaging software.

Now the Internet is mainly based on the server (Browser) or Server (Server) / Client (Client) structure of the application mode, such applications must set up at least one server in the network, Information can only be passed through the server. In this mode, information can be uploaded to the server for storage, then downloaded separately (such as a website), or the information can be processed on the server to pass the flow (such as mail) on the network.

At present, there are many applications based on P2P technology, and instant communication technology is one of the typical representative technologies. In instant messaging applications, two or more users communicate with each other using text, voice, or files. This communication is fast and straightforward, and is easy to communicate with non-PC network devices (such as PDAs, cell phones, etc.). Users can be identified without relying on the device. Since P2P technology can be used to weaken or even get rid of the dependence on the central server, such communication is closer to the non-internet communication mode. In the current instant messaging applications, video communication is a very wide-ranging application. With the popularity of video communication, users have more and more demands for video communication. Among them, multi-person video is a very urgent need. However, people are no longer satisfied with multi-person video. People want to add more elements to the video, such as text chat to assist video chat, chat to send custom images, and file sharing.

In instant messaging applications, the implementation of multi-person data sharing can be interpreted as an additional data transfer function such as multi-person text chat and multi-person file sharing. The existing multi-person text chat and multi-person file sharing are based on the server/client mode, that is, the sender's text information or file will be transmitted to the server first, and then the server will distribute the text information or file to other servers. people. In this technology, an additional server is needed to forward the corresponding data, which not only increases the cost investment, but also destroys the original P2P audio and video system structure.

In addition to instant messaging technology, P2P-based technologies include Farsite (Microsoft), Ocean Store and other data storage software; Napster and other data sharing software; Infrasearch, Pointera and other data search and query software; Netbatch (Intel) and other collaboration Computational software; Groove and other data or mobile collaboration software and a large number of P2P-based game software, in fact, many online games are also P2P, especially those games for two and more people. In these P2P-based applications, different types of data transmission problems are usually involved. If an additional server is used to forward the corresponding data, it will obviously increase the cost, and how to save costs is any P2P transmission method. All should be focused on.

In view of this, the main object of the present invention is to propose a P2P-based data transmission method to reduce costs.

Another object of the present invention is to propose a P2P-based data transmission system to reduce costs.

To achieve the above objective, the technical solution of the present invention is implemented as follows: a P2P-based data transmission method, which pre-establishes a P2P connection between a sender and a receiver, and the method further includes: A, the sender according to the transmission data The type identifies the transmission data, and sends the identified transmission data to the receiver based on the P2P connection, wherein the type of the transmission data is at least one type; B, the receiver parses the received transmission data Obtaining an identifier of the transmission data, and processing the transmission data according to a type corresponding to the identifier.

A P2P-based data transmission system, the system comprising: a sender, configured to identify the transmission data according to a type of transmission data, and send the identified transmission data to a receiver based on a P2P connection, wherein the transmission The type of the data is at least one type; the receiving side is configured to parse the received transmission data to obtain an identifier of the transmission data, and process the transmission data according to a type corresponding to the identifier; the sender and the receiver The connection between them is a P2P connection.

As can be seen from the above technical solution, in the P2P-based data transmission method of the present invention, the sender identifies the transmission data according to the type of the transmission data, and transmits the identified transmission data to the receiver based on the P2P connection. The receiver parses the transmission data to obtain the identification of the transmission data, and processes the transmission data according to the type corresponding to the identifier. It can be seen that after applying the invention, different types of transmission data can be transmitted at a cost-effective manner. In addition, the present invention can also reuse existing audio and video channels on the basis of P2P multi-person audio and video communication, and realize multi-person data sharing such as multi-person text chat and multi-person file sharing without server distribution, and It can guarantee the smoothness of audio and video communication.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The main idea of the present invention is: in the P2P communication mode, the sender identifies different types of data, and the receiver performs corresponding processing on different data according to the identification, so as to realize different types of data by using the same data channel. There is no need to use additional servers, which results in significant cost savings.

1 is a flow chart of an exemplary method for transmitting data based on P2P according to the present invention. The method pre-establishes a P2P connection between the sender and the receiver. As shown in FIG. 1, the method further includes: Step 101: The sender identifies the transmission data according to the type of the transmission data, and based on the P2P connection. Sending the identified transmission data to the recipient, wherein the type of the transmission data is at least one.

For a data channel that is only used to transfer data, it does not really care what is being transmitted. Therefore, different types of data can be separately identified, and then the identified data is uniformly transmitted through the P2P connected data channel.

Step 102: The receiver parses the transmission data to obtain an identifier of the transmission data, and processes the transmission data according to the type corresponding to the identifier.

After receiving the transmission data, the receiver first parses the transmission data to obtain the identifier, and then processes the transmission data according to the type corresponding to the identifier.

Here, since there are many kinds of transmission data received by the receiver, it is necessary to distinguish the processing. The transmission data may be parsed first to obtain an identifier, and then the transmission data is processed according to the type corresponding to the identifier.

For example, the present invention will be described below by taking an audio video chat in an instant messaging application as an example.

First, when multiple people are engaged in P2P communication, a data channel will be established between each two people for transmission of data. For example, when N people perform multi-person video, then everyone will establish a data channel with other N-1 people, and then transmit their audio and video data to other N-1 people through these channels, while receiving other N- 1 person's audio and video data, thus audio and video communication.

However, for the audio and video data channel, although it is specifically used to transmit audio and video data, in fact, the audio and video data channel does not care what data is transmitted. With this, the audio and video channels can be fully utilized. It transmits some additional information to enable additional communication functions. According to the present invention, data can be identified to facilitate parsing and processing different types of data. Since the underlying channel is the same for any data transmission, the data needs to be identified before transmission, and then the receiver parses different types of data according to different identifiers, thereby performing different processing. At the same time, since the audio and video channels are utilized, the influence on the audio and video communication should be considered, and the data transmission and reception should not be directly performed like a normal channel. In order to ensure the smoothness of audio and video communication, an active data flow is required to be transmitted on the audio and video channels. Then, when using this channel to transmit additional data, the impact on the transmission of audio and video data should be minimized so that it does not have a great influence on the smoothness of audio and video communication.

The transmission methods of the sender and the receiver to which the present invention is applied will be described below.

2 is a schematic flow chart of a sender transmitting data according to the present invention. As shown in FIG. 2, the method includes: Step 201: adding corresponding identifiers to different types of data, and then uniformly adding data to the data sending queue; the sender needs to identify the data before transmitting, so that the receiving party can Different identifiers parse different types of data for different processing. Here, the sender's identification of the data is related to the functional requirements, because the receiver will handle different functional data differently. For example, video data needs to be decoded and displayed, text chat data needs to be displayed in a chat box, and image data needs to be parsed and displayed in a corresponding picture format. Therefore, the sender adds the data corresponding to the first function to the first function data identifier, adds the data corresponding to the second function to the second function data identifier, and adds the data corresponding to the third function to the third function data identifier. . After the sender adds different identifiers to the data of different functions (that is, different types), the data is uniformly added to the data transmission queue. Here, the transmission data may be any one of audio material, video data, electronic file, instant messaging information, or any combination of more than one of them.

Step 201: Obtain data from the sending queue and send it to different users.

Since the transmission mode of the P2P preferably corresponds to a plurality of users, that is to say preferably corresponding to a plurality of senders and receivers, it is preferred here to transmit data to different recipients. Similarly, other senders have the same or similar sending process.

When the number of senders is at least two, each sender separately identifies the transmission data sent by the sender according to the type of the transmission data, wherein each sender uses the same identifier for the same type of transmission data, and each sender The identified transmission data is transmitted to the recipient based on the P2P connection.

This enables a way to distribute multiple functions of data to multiple users. For the receiver, it is also necessary to establish mechanisms for receiving multiple channels of data and parsing and processing multiple functional data. Corresponding to the flow shown in FIG. 2, FIG. 3 is a schematic flow chart of receiving data by a receiver according to the present invention. As shown in FIG. 3, the method includes: Step 301: Receive data from different users, and add all data to the data processing queue; since the P2P transmission mode preferably corresponds to multiple users, that is, preferably corresponds to multiple senders And the recipient, where it is preferred to receive data from different senders and to add all data to the data processing queue.

Step 302: Acquire and parse the data from the data processing queue, and perform corresponding processing corresponding to the data of different identifiers.

Here, the data is first obtained from the data processing queue, and then the data is parsed to obtain the corresponding identification, and the data corresponding to the identification is separately processed. For example, the video data is decoded and displayed, the text chat data needs to be displayed in the chat box, the picture data is parsed and displayed in the corresponding picture format, and the like. In other words, different materials are processed differently.

Wherein, when the number of the receivers is at least two, each receiver parses the received transmission data to obtain the identifier of the transmission data, and uniformly processes the transmission data with the same identifier according to the type corresponding to the identifier.

Obviously, according to the above method, by reusing the P2P multi-person audio video channel, a multi-user multi-function system can be completed, such as multi-person text chat while multi-person audio video chat. 4 is a schematic diagram of multi-person audio and video chat according to an exemplary embodiment of the present invention. As can be seen from FIG. 4, multiple users can perform text chat while performing multi-person audio and video chat, thereby greatly promoting the intimate feeling of the chat, and does not need to improve the existing server architecture, and also greatly saves The cost.

In addition, when the present invention is applied to multi-person chat in an instant messaging application, since the audiovisual channel is used to transmit additional data, it is necessary to consider the influence of the additional data on the audiovisual communication, and it is preferable not to directly transmit and receive the data. . In order to ensure the smoothness of audio and video communication, an active data flow is required to be transmitted on the audio and video channels. Therefore, when using this channel to transmit additional data, the impact on audio and video data transmission should be minimized, so that it will not It has any bad influence on the smoothness of audio and video communication. The present invention preferably controls the transmission frequency of the additional data to avoid affecting the audio and video fluency.

When the additional transmission data is too large, not only the data transmission is performed by adding the identification, but also the frequency of transmission is controlled. Otherwise, the audio and video data may be blocked due to the large amount of additional data transmission, thereby affecting the audio and video information. The fluency of communication.

Therefore, in the present invention, it is preferable that the sender preliminarily mixes various types of transmission materials at intervals before transmitting the transmission material. Due to the existence of the data transmission queue, as long as the interval between the additional data and the data transmission queue is fixed, the interval for sending data in the order of the transmission is also fixed, so that the network may be ignored. Network transmission fluctuations. Therefore, for audio and video data, when the data transmission queue is added, it is continuously added, and the additional data is inserted at equal intervals when adding the data transmission queue, so that the transmission data is mixed at equal intervals. Therefore, as long as the data is periodically sent from the transmission queue order, the time interval for data transmission is guaranteed to be constant.

Here, in the equally spaced mixed transmission data, M additional data may be spaced every N audio/video data, where N is a positive integer greater than or equal to 1, and M is also a positive integer greater than or equal to 1. . The value of N and M is not limited in the present invention, and the value of N may be greater than M, or may be smaller than M, and may be equal to M. For example, when N is equal to 3, there may be 1 additional data per 3 audio/video data, or 2 additional data per 3 audio/video data intervals, or 3 intervals per 3 audio/video data. Additional information, generally choose to insert an additional data for every three audio and video data.

Obviously, although N is equal to 3 as an example, the present invention does not limit the value of N.

FIG. 5 is a schematic diagram of a transmission queue according to an embodiment of the invention. In Fig. 5, the circular data is audio and video data, and the block data is additional data. As can be seen from Fig. 5, one additional data is inserted at intervals of every three audio and video data, and the additional data can be electronic files and instant messaging information ( Text chat information) and so on.

FIG. 6 is a schematic diagram of an exemplary structure of a P2P transmission data system according to the present invention. As shown in FIG. 6, the system includes a plurality of terminals, wherein each terminal can be either a sender or a receiver. The system includes: a sender, configured to identify the transmission data according to a type of the transmission data, and send the identified transmission data to the receiver based on the P2P connection, wherein the type of the transmission data is at least one type; the receiving party, The identifier for parsing the transmission data to obtain the transmission data, and processing the transmission data according to the type corresponding to the identifier; the connection between the sender and the receiver is a P2P connection.

Preferably, the number of the senders is at least two, and the number of the receivers is at least two.

Each sender is configured to separately identify the transmission data sent by the sender according to the type of the transmission data, wherein each sender uses the same identifier for the same type of transmission data, and each sender is further used to connect based on the P2P The identified transmission data is sent to the recipient.

Each receiving party is configured to parse the transmission data received by the receiver to obtain an identifier of the transmission data, and uniformly process the transmission data with the same identification according to the type corresponding to the identifier.

More preferably, the type of transmission data is at least two types, and the sender is further configured to equally mix various types of transmission materials before transmitting the transmission data. The transmission data that is mixed at equal intervals includes audio/video data and additional data. In general, an additional data can be selected for every three audio/video data.

It can be seen that after the application of the invention, the existing audio and video channels can be reused on the basis of P2P multi-person audio and video communication, thereby realizing multi-person text chat, multi-person file sharing, etc. without server distribution. Multi-person data sharing.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

1 is a flow chart of an exemplary method for transmitting data based on P2P according to the present invention; FIG. 2 is a schematic flow chart of transmitting data by a sender according to the present invention; FIG. 3 is a schematic flow chart of receiving data by a receiver according to the present invention; 4 is a schematic diagram of multi-person audio video and text chat according to an exemplary embodiment of the present invention; FIG. 5 is a schematic diagram of a transmission queue according to an embodiment of the present invention; FIG. 6 is an exemplary embodiment of a P2P transmission data-based system according to the present invention; Schematic.

Claims (10)

A point-to-point P2P-based data transmission method, the method pre-establishing a P2P connection between a sender and a receiver, wherein the method further comprises: A. The sender identifies the transmission data according to the type of the transmission data. And transmitting, according to the P2P connection, the identified transmission data to the receiver through the data channel of the P2P connection, wherein the type of the transmission data is at least one type; B, the receiver parses the received transmission data Obtaining an identifier of the transmission data, and processing the transmission data according to a type corresponding to the identifier. A peer-to-peer P2P-based data transmission method according to claim 1, wherein the number of the senders is at least two, and the number of the receivers is at least two; the step A includes: The senders respectively identify the transmission data sent by the sender according to the type of the transmission data, wherein each sender uses the same identifier for the same type of transmission data, and each sender uniformly passes the P2P based on the P2P connection. The connected data channel sends the identified transmission data to the receiver; the step B includes: each receiver parses the received transmission data to obtain the identification of the transmission data, and identifies the same transmission data. The processing is performed uniformly according to the type corresponding to the identification. A point-to-point P2P-based data transmission method according to claim 1 or 2, wherein the transmission data is one of audio data, video data, electronic files, instant messaging information, or any one of more than one of combination. A point-to-point P2P-based data transmission method according to claim 1 or 2, wherein the transmission data has at least two types, and the method further comprises: before transmitting the transmission data, the sender pre-sets various The type of transmission data is equally mixed; the step P1P sends the identified transmission data to the receiver based on the P2P connection: transmitting the equally spaced transmission data to the receiver based on the P2P connection. A point-to-point P2P-based data transmission method according to claim 4, wherein the equally spaced transmission data comprises audio/video data and additional data. A peer-to-peer P2P-based data transmission method according to claim 5, wherein in the equally spaced transmission data, each additional N audio/video data is separated by M additional data, where N is greater than Or a positive integer equal to 1, and M is a positive integer greater than or equal to 1. A point-to-point P2P-based data transmission method according to claim 5, wherein the additional information includes an electronic file or instant messaging information. A point-to-point P2P-based data transmission system, comprising: a sender, configured to identify the transmission data according to a type of transmission data, and based on a P2P connection, uniformly through a data channel of the P2P connection Receiving, by the receiving party, the identified transmission data, wherein the type of the transmission data is at least one type; and the receiving side is configured to parse the received transmission data to obtain an identifier of the transmission data, and according to the type corresponding to the identifier Processing the transmission data; the connection between the sender and the receiver is a P2P connection. A point-to-point P2P-based data transmission system according to claim 8, wherein the number of the senders is at least two, and the number of the receivers is at least two; each sender is used for And transmitting, according to the type of the transmission data, the transmission data sent by the sender, wherein each sender uses the same identifier for the same type of transmission data, and each sender is further configured to send the foregoing to the receiver based on the P2P connection. The transmission data of the identifier; each receiver is configured to parse the transmission data received by the receiver to obtain the identifier of the received transmission data, and uniformly process the transmission data with the same identifier according to the type corresponding to the identifier. A peer-to-peer P2P-based resource as described in item 8 of the patent application scope. The material transmission system, wherein the type of transmission data is at least two types, and the sender is further configured to mix various types of transmission materials at equal intervals before transmitting the transmission data.