WO2015032087A1

WO2015032087A1 - Method, device, and system for multi-stream multiplexing

Info

Publication number: WO2015032087A1
Application number: PCT/CN2013/083125
Authority: WO
Inventors: 朱晓荣; 朱亚丽; 朱洪波; 邢平平
Original assignee: 华为技术有限公司
Priority date: 2013-09-09
Filing date: 2013-09-09
Publication date: 2015-03-12
Also published as: CN104620669A; CN104620669B

Abstract

A method, device, and system for multi-stream multiplexing. An implementation of the method comprises: a master terminal establishes a connection to a media server via a first network and transmits a service request to the media server; when a slave terminal that establishes a connection to the media server via a second network is detected by the master terminal, same transmits a coordinated transmission request to a streaming decision-making server, establishes a personal area network with the slave terminal to acquire context information of the slave terminal, and transmits the context information of the master terminal and of the slave terminal in the personal area network to the streaming decision-making server; the context information of the master terminal and of the slave terminal is used for executing a streaming decision; the result of the streaming decision is used for splitting raw data that corresponds to the service request into first data and second data; the master terminal receives the first data transmitted by the media server to the master terminal and receives the second data forwarded by the slave terminal from the media server; and, the master terminal recombines the first data and the second data to acquire the raw data. This allows for increased peer-to-peer throughput and network resource utilization rate.

Description

Multi-stream concurrent transmission method, device and system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a multi-stream concurrent transmission method, apparatus, and system. Background technique

With the popularity of wireless networks, terminals can access the Internet through multiple wireless access technologies.

(Internet). At the same time, mobile terminals have evolved from single-mode, dual-mode to multi-mode, with more and more wireless interfaces. On top of this cornerstone, researchers are committed to enabling heterogeneous networks to simultaneously carry one data service by integrating multiple access technologies for multimode terminals or multiple access technologies for different terminals within a personal area network, not only to users. Provides faster transfer rates and increases network resource utilization, business reliability, and user experience. The key to this technology is how to reasonably distribute data to different terminals according to the characteristics of the service, the network and the capabilities of each terminal, and how to sort the received data to restore the original data at the receiving end. The above-mentioned personal area network (PAN) is an emerging wireless communication network technology proposed to realize a small activity radius, a rich service type, and a specific group and wireless seamless connection.

Multi-path parallel transmission based on SCTP (Stream Control Transmission Protocol) has attracted attention. SCTP allows one end of the association to bind multiple IP (Internet Protocol) addresses. This binding allows the sender to send data to the receiver through different paths, thus improving the reliability of the association. However, the SCTP protocol currently only allows one of the paths to be used for data transmission. Normally, data is only transmitted on the preferred path, and when the connectivity of the preferred path fails, it goes to the alternate path. Since the SCTP protocol only allows one of the paths to be used for data transmission at the same time, the SCTP protocol cannot fully utilize the network resources of multiple paths to improve the end-to-end throughput, and thus the network resource utilization is low. Summary of the invention

Embodiments of the present invention provide a multi-stream concurrent transmission method, apparatus, and system for improving network resource utilization.

An embodiment of the present invention provides a multi-stream concurrent transmission method, including: The primary terminal establishes a connection with the media server through the first network, and sends a service request to the media server; the first network is a network used by the primary terminal to connect to the media server;

After detecting the slave terminal that establishes the connection with the media server through the second network, the master terminal sends a coordinated transmission request to the offload decision server, and acquires the context information of the slave terminal from the establishment of the personal area network of the slave terminal, and the intra-domain network is The context information of the master terminal and the slave terminal is sent to the offload decision server; the context information of the master terminal and the slave terminal is used to perform a offload decision; the result of the offload decision is used to split the original data corresponding to the service request And being the first data and the second data; the second network is a network that is connected to the media server by the slave terminal;

Receiving, by the primary terminal, first data sent by the media server to the primary terminal, and receiving, by the secondary terminal, second data from the media server;

The main terminal recombines the first data and the second data to obtain original data.

In combination with the implementation of the first aspect, in the first optional implementation, the first data and the second data include: a data segment used to represent the first data or the second data in the original data. Label

The master terminal reassembles the first data and the second data to obtain original data, including: the primary terminal sorts the first data and the second data according to the label to obtain original data.

In a second optional implementation manner, the second data packet further includes:

A socket descriptor indicating the path through which the second packet passes, the address of the slave terminal, and the address of the master terminal.

In conjunction with the second or optional implementation of the first or one aspect of the aspect, in a third optional implementation, the method further includes:

If the master terminal detects a new slave terminal, the master terminal joins the new slave terminal to the personal area network and acquires context information of the new slave terminal, and the new slave terminal Context information is sent to the offload decision server.

A second embodiment of the present invention provides a multi-stream concurrent transmission method, including:

The media server receives the service request of the primary terminal, and determines the original data corresponding to the service request; the media server receives the result of the offloading decision delivered by the offloading decision server, where the offloading decision is Determining, by the branching decision server, the context information of the primary terminal and the context information of the secondary terminal in the same domain network as the primary terminal;

The media server splits the original data into first data and second data according to the result of the offloading decision;

The media server transmits the first data to the primary terminal and the second data to the secondary terminal.

In combination with the implementation of the two aspects, in the first optional implementation, after the splitting the original data into the first data and the second data, the method further includes:

The media server adds, in the first data and the second data, a label for indicating a data segment of the first data or the second data in the original data, respectively.

In combination with the implementation of the second aspect or the first optional implementation of the second aspect, in a second optional implementation manner, the result of the offloading decision is a first ratio, where the first ratio is a primary terminal And the ratio of the transmission bandwidth of the slave network to the total bandwidth of the terminal;

The media server splits the original data into first data and second data according to the first ratio, and a ratio of a data amount of the first data to a data amount of the original data is equal to the first ratio.

A third embodiment of the present invention provides a multi-stream concurrent transmission method, including:

The offload decision server receives context information of the master terminal and context information of the slave terminal in the same domain network as the master terminal;

The offloading decision server determines, according to the context information of the primary terminal and the context information of the secondary terminal in the same domain network as the primary terminal, a splitting decision of the original data corresponding to the service request of the primary terminal;

The offloading decision server sends the result of the offloading decision to the media server, instructing the media server to perform splitting of the original data corresponding to the service request of the primary terminal according to the splitting policy.

In combination with the implementation of the three aspects, in the first optional implementation manner, the context information includes: indicating a transmission bandwidth of a network where the context corresponding terminal is located;

And the offloading decision packet for determining the original data corresponding to the service request of the primary terminal according to the context information of the primary terminal and the context information of the secondary terminal in the same domain network as the primary terminal Includes:

The offload decision server uses the first ratio as a result of the offloading decision; the first ratio is a ratio of the transmission bandwidth of the main terminal and the slave network in which the slave terminal is located to the total bandwidth, and the total bandwidth is transmitted by the main terminal and the network where the slave terminal is located. The sum of the bandwidth.

A fourth aspect of the present invention provides a terminal, including:

a connection establishing unit, configured to establish a connection between the primary terminal and the media server by using the first network; the first network is a network used by the primary terminal to connect to the media server;

a service request sending unit, configured to send a service request to the media server after the connection establishing unit establishes a connection with the media server;

a detecting unit, configured to detect whether there is a slave terminal that establishes a connection with the media server through the second network; the second network is a network that is connected to the media server by the slave terminal;

a collaboration request sending unit, configured to send a coordinated transmission request to the offload decision server after the detecting unit detects the slave terminal that establishes a connection with the media server through the second network;

An information acquiring unit, configured to acquire context information of the slave terminal from the terminal to establish a personal area network; the information sending unit is configured to send the context information of the master terminal and the slave terminal in the personal area network to the offload decision server; The context information of the master terminal and the slave terminal is used to perform the offloading decision; the result of the offloading decision is used to split the original data corresponding to the service request into the first data and the second data;

a data receiving unit, configured to receive first data sent by the media server to the primary terminal, and receive second data from the media server that is forwarded by the secondary terminal;

And a data recombining unit, configured to recombine the first data and the second data to obtain original data. In combination with the implementation of the four aspects, in the first optional implementation, the first data and the second data include: a data segment used to represent the first data or the second data in the original data. Label

The data recombining unit is configured to sort the first data and the second data according to the label to obtain original data.

With reference to the first optional implementation of the four aspects, in the second optional implementation, the second data packet received by the data receiving unit further includes: a path for indicating the path of the second data packet The socket descriptor, the address of the slave terminal, and the address of the master terminal. In combination with the fourth or fourth aspect, the second optional implementation of the fourth or fourth aspect, in the third optional implementation, the information acquiring unit is further configured to: if the detecting unit detects a new The slave information transmitting unit is further configured to send the context information of the new slave terminal to the offload decision server.

A fifth aspect of the present invention provides a media server, including:

a service request receiving unit, configured to receive a service request of the primary terminal;

a data determining unit, configured to determine original data corresponding to the service request received by the service request receiving unit;

a decision receiving unit, configured to receive a result of the offloading decision delivered by the offloading decision server, where the offloading decision is performed by the offloading decision server according to context information of the primary terminal and a slave in the same domain network as the primary terminal The context information of the terminal is determined;

a splitting unit, configured to split the original data determined by the data determining unit into the first data and the second data according to a result of the splitting decision received by the decision receiving unit;

And a data sending unit, configured to send the first data to the primary terminal, and send the second data to the secondary terminal.

In combination with the implementation of the five aspects, in the foregoing optional implementation, the media server further includes:

a labeling unit, configured to, after the splitting unit splits the original data into the first data and the second data, respectively adding, in the first data and the second data, the first data or the second data The label of the data segment of the data in the original data.

In the second optional implementation manner, the result of the offloading decision is a first ratio, and the first ratio is a primary terminal, in combination with the implementation manner of the five aspects, or the first optional implementation manner of the five aspects. And the ratio of the transmission bandwidth of the slave network to the total bandwidth of the terminal;

The splitting unit is configured to split the original data into first data and second data according to the first ratio, and a ratio of a data amount of the first data to a data amount of the original data is equal to The first ratio is stated.

A sixth aspect of the present invention provides a traffic distribution decision server, including:

An information receiving unit, configured to receive context information of the primary terminal and be the same as the primary terminal Context information of the slave terminal within the personal area network;

a decision determining unit, configured to determine, according to the context information of the primary terminal and the context information of the secondary terminal in the same domain network as the primary terminal, a branching decision of the original data corresponding to the service request of the primary terminal;

And a decision sending unit, configured to send the result of the offloading decision to the media server, and instruct the media server to perform splitting of the original data corresponding to the service request of the primary terminal according to the splitting policy.

In combination with the implementation of the six aspects, in the first optional implementation manner, the context information includes: indicating a transmission bandwidth of a network where the context corresponds to the terminal;

The decision determining unit is configured to use the first ratio as a result of the offloading decision; the first ratio is a ratio of a transmission bandwidth of the network where the master terminal and the slave terminal are respectively located to a total bandwidth, where the total bandwidth is a master terminal and a slave The sum of the transmission bandwidth of the network where the terminal is located.

A seventh embodiment of the present invention provides a multi-stream concurrent transmission system, including: a media server and a offload decision server;

The media server is any one of the media servers provided by the fifth aspect of the present invention, and the offloading decision server is the offloading decision server provided by any one of the six aspects of the embodiments of the present invention.

As can be seen from the foregoing technical solutions, the embodiments of the present invention have the following advantages: The primary terminal and the secondary terminal respectively use different network accesses, and the primary terminal establishes a personal area network with the secondary terminal, and the primary terminal sets the context information of the terminal in the personal area network. The data is sent to the decision server, and the decision server performs the offload decision. The media server splits the original data packet according to the result of the split decision, and then sends the original data packet to the main terminal through different links, and then the original data is restored by the main terminal. Data can be transmitted concurrently, making full use of the network resources of the slave terminals that can assist the transmission around the primary terminal, which can improve end-to-end throughput and network resource utilization. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without premise of creative labor Further drawings can also be obtained from these figures.

1 is a schematic flowchart of a method according to an embodiment of the present invention;

2 is a schematic flowchart of a method according to an embodiment of the present invention;

3 is a schematic flowchart of a method according to an embodiment of the present invention;

4 is a schematic flowchart of a method according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a networking of an embodiment of the present invention; FIG.

6 is a schematic structural diagram of a concurrent server according to the present invention;

7 is a schematic flowchart of a signaling process initiated by a terminal according to an embodiment of the present invention;

8 is a schematic flowchart of a method for restoring data according to an embodiment of the present invention;

9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

10 is a schematic structural diagram of a media server according to an embodiment of the present invention;

11 is a schematic structural diagram of a media server according to an embodiment of the present invention;

12 is a schematic structural diagram of a branching decision server according to an embodiment of the present invention;

13 is a schematic structural diagram of a system according to an embodiment of the present invention;

14 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

15 is a schematic structural diagram of a media server according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of a branching decision server according to an embodiment of the present invention. detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. . All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention provides a multi-stream concurrent transmission method. The solution in this embodiment can be implemented on the main terminal side. Referring to FIG. 1, the method includes:

101: The primary terminal establishes a connection with the media server through the first network, and sends a service request to the media server; the first network is a network used by the primary terminal to connect to the media server; the first network may be a WLAN. (Wireless Local Area Network, WLAN) may also be other networks, which is not limited by the embodiment of the present invention, and the second network mentioned later It is a network that is not identical to the first network. In order to distinguish the primary terminal from the network used by the terminal to access the media server, the first network and the second network are used to distinguish. The second network may generally be 3G (The Third Generation Mobile Telecommunicatio), 4G network terminal, etc., for example: CDMA (Code Division Multiple Access) network, WCDMA (Wideband Code Division) Multiple Access, Wideband Code Division Multiple Access, LTE (Long Term Evolution), GSM (Global System for Mobile communications), broadband network, etc. The first network and the second network specific network type are not limited in the embodiment of the present invention.

102: After detecting the slave terminal that establishes the connection with the media server by using the second network, the master terminal sends a coordinated transmission request to the offload decision server, and acquires context information of the slave terminal from the establishment of the personal area network of the slave terminal, and the foregoing personal area network The context information of the master terminal and the slave terminal is sent to the offload decision server; the context information of the master terminal and the slave terminal is used to perform the offload decision; the result of the offload decision is used to split the original data corresponding to the service request into the first a data and a second data; the second network is a network in which the slave terminal is connected to the media server;

103: The primary terminal receives the first data sent by the media server to the primary terminal, and receives the second data that is forwarded by the secondary terminal from the media server.

104: The primary terminal recombines the first data and the second data to obtain original data.

In the above embodiment, the primary terminal and the secondary terminal respectively use different network accesses, and the primary terminal establishes a personal area network with the secondary terminal, and the primary terminal sends the context information of the terminal in the personal area network to the decision server through the context server, and the decision server The offloading decision is made, and the original data packet is split by the media server according to the result of the offloading decision, and then sent to the main terminal through different links, and then the original data is restored by the main terminal. Data can be transmitted concurrently, making full use of the network resources of the slave terminals that can assist the transmission around the primary terminal, which can improve end-to-end throughput and network resource utilization.

Optionally, the first data and the second data include: a label for indicating a data segment of the first data or the second data in the original data; and the primary terminal recombines the first data and the second data Obtaining the original data includes: the foregoing main terminal sorts the first data and the second data according to the above label to obtain the original data.

Further, the foregoing second data packet further includes: a socket descriptor for indicating a path through which the second data packet passes, an address of the slave terminal, and an address of the master terminal. Further, the method further includes: if the master terminal detects a new slave terminal, the master terminal adds the new slave terminal to the personal area network and acquires context information of the new slave terminal, and the new The context information of the slave terminal is sent to the above-mentioned offload decision server.

The embodiment of the present invention further provides another multi-stream concurrent transmission method. The method in this embodiment can be implemented on the media server side. As shown in FIG. 2, the method includes:

201: The media server receives the service request of the primary terminal, and determines the original data corresponding to the service request.

202: The media server receives a result of the offloading decision delivered by the offloading decision server, where the offloading decision is determined by the offloading decision server according to the context information of the primary terminal and the context information of the slave terminal in the same domain network as the primary terminal;

203: The media server splits the original data into the first data and the second data according to the result of the foregoing offloading decision.

Further, after the splitting the foregoing original data into the first data and the second data, the method further includes: adding, by the media server, the first data and the second data respectively to indicate that the first data or the second data is in the original data The label of the data segment.

Optionally, if the result of the foregoing offloading decision is a first ratio, the first ratio is a ratio of a transmission bandwidth of a network where the master terminal and the slave terminal respectively belong to a total bandwidth; and the media server splits the original data according to the first ratio. Dividing into the first data and the second data, the ratio of the data amount of the first data to the data amount of the original data is equal to the first ratio.

204: The media server sends the first data to the primary terminal, and sends the second data to the secondary terminal.

The embodiment of the present invention further provides another multi-stream concurrent transmission method. The method in this embodiment can be implemented on the side of the offloading decision server. As shown in FIG. 3, the method includes: 301: The offload decision server receives context information of the master terminal and context information of the slave terminal in the same domain network as the master terminal.

302: The offload decision server determines, according to the context information of the primary terminal, and the context information of the slave terminal that is in the same domain network as the master terminal, the offloading decision of the original data corresponding to the service request of the master terminal;

The context information includes: a transmission bandwidth indicating a network in which the context corresponds to the terminal; the foregoing determining the original data corresponding to the service request of the primary terminal according to the context information of the primary terminal and the context information of the secondary terminal in the same domain network as the primary terminal The shunting decision includes: the shunting decision server uses the first ratio as a result of the shunting decision; the first ratio is the ratio of the transmission bandwidth of the main terminal and the slave terminal respectively to the total bandwidth, and the total bandwidth is the network of the master terminal and the slave terminal. The sum of the transmission bandwidths.

303: Send the result of the foregoing offloading decision to the foregoing media server, and instruct the media server to perform splitting of the original data corresponding to the service request of the primary terminal according to the splitting policy.

The above embodiments respectively provide a method for implementing multi-stream concurrent transmission on the main terminal, the media server, and the decision server side. The following embodiments will provide a more detailed and systematic illustration of the multi-stream concurrent transmission method in a system integration manner. The specific execution steps of the context server and the slave terminal side mentioned in the foregoing embodiments are also involved in the description. Please refer to Figures 4 and 5.

In the example of the following embodiment, the service is an example of the download service, and the service request may be a service download request, and the service to be transmitted is required to be described. The example of downloading the service should not be understood as the embodiment of the present invention. The only limit. In the following embodiments, the primary terminal uses a WLAN access media server, and the secondary terminal accesses the media server using a 3G network. For details, see Figure 4 and Figure 5 for the networking structure. FIG. 5 is a schematic diagram of a network structure of a multi-stream concurrent transmission control method based on service adaptation. The primary terminal uses a WLAN to access a media server, and the secondary terminal uses a 3G network to access the media server. The number of the terminals is greater than or equal to one, and the upper limit thereof is not limited in the embodiment of the present invention. The master terminal and the slave terminal are merged into a personal area network, and the slave terminal sends the respective context information to the master terminal, and the master terminal sends the context information of the master terminal and the slave terminal in the personal area network to the context server, and the context server receives the same. The context information is forwarded to the offload decision server, and the offload decision server determines the offload decision according to the context information and sends the split decision to the media server. The media server splits the original data of the download service, and the split data is directly sent to the main terminal, and part of the data is directly transmitted to the main terminal. It is sent from the terminal to the master terminal. Please refer to FIG. 4, and please refer to FIG. 5 together. The specific process includes:

401: The primary terminal establishes a connection with the media server through the WLAN access network, and the primary terminal initiates a service request to the media server.

402: The required transmission bandwidth is different because the service type is different. If the primary terminal finds that the data transmission capability of the single link (the link between the media server and the primary terminal) cannot fully meet the service requirements of the primary terminal, the primary terminal It would be desirable to conduct coordinated transmissions in a manner that their terminals cooperate to increase the data download link rate. The master terminal detects whether there is a device (slave terminal) that can be cooperatively transmitted. If found, the master terminal can send a coordinated transmission request to the offload decision server, and send the information of the slave terminal to the offload decision server.

403: The offload decision server notifies the context server of the information of the terminal, and the context server can authenticate the slave terminal to determine whether the slave can or is allowed to perform coordinated transmission. If the authentication passes, the next step is performed, if the authentication fails. This process ends.

404: The slave terminal accesses the network through a different access network than the master terminal, such as GSM, WCDMA, CDMA, or a broadband access network. In this step, the slave terminal also establishes a personal area network with the master terminal, and sends the respective context information to the master terminal. The reporting context information in this step may be reported periodically (for example, 3 min/time), or may be updated (ie, the context information is updated and reported, and the update does not occur.), specifically "3⁄4 context information. The manner of the present invention is not limited.

The above context information may include: network status, transmission bandwidth, storage capacity, terminal location, and the like. The specific information content can be determined according to the basis of the required information of the traffic distribution policy. The combination of the optional information items of the context information is very large, and the embodiments of the present invention cannot be exhaustive. The above examples should not be construed as A definition of an embodiment of the invention.

This step can be mainly divided into the following two aspects:

1) Before the terminal accesses the network, it can establish a connection with the master terminal through Wifi (Wireless Fidelity), Bluetooth (Bluetooth), etc., to form a domain network, and transmit context information to the master terminal. Thereby, the master terminal can interact with the context server for the context information of each terminal in the personal area network.

2) The main terminal and the slave terminal and the media server may be configured in a C/S (Client/Server, Client/Server Layer 2 Architecture) mode, and communicate using TCP (Transmission Control Protocol). Then, the link association between the master terminal and the slave terminal is established, so that the concurrent transmission system is formed between the media server and the terminal, and the following processing manner can be implemented:

For example: The media server can work in the passive open mode, and the media server is bound to a port for listening to the client's connection request. After receiving the connection request from the primary terminal, the connection initiated by the primary terminal is assigned a temporary port for use in the connection initiated by the primary terminal. The listening port will be released to continue listening for the next connection request. The terminal accesses the media server through the (WCDMA, CDMA, etc.) network.

If you are on Linux (a free and open source operating system), you can do it with a parent-child process. The media server is responsible for receiving the connection request between the master terminal and the slave terminal, and makes the master terminal a parent process. It works on a well-known port, and the child process works on the temporary port. The media server can become a concurrent server, and the concurrent transmission system is formed between the media server and the terminal.

405: The primary terminal sends the context information of the terminal in the personal area network to the context server. It can be understood that the terminals in the above-mentioned personal area network include a master terminal and a slave terminal. The number of slave terminals may be one or more, and the number of slave terminals is not limited in the embodiment of the present invention.

406: The context server may establish and manage a database, where the context information of the terminal may be stored, and the context information may include: network status, transmission bandwidth, storage capacity, terminal location, and the like. The context server may periodically obtain context information from the master terminal, or may receive the context information, update the context information in the database after receiving the context information, and send the context information to the offload decision server.

The context information sent to the offload decision server may be directly forwarded, or may be first determined whether the context information is updated, and updated context information is sent if there is an update. The former context server has a smaller amount of data processing, while the latter can reduce unwanted context information. The embodiment of the present invention is not limited.

407: The offload decision server determines the offload decision through the comprehensive calculation according to the received context information and sends the offload decision to the media server.

The above-mentioned shunting decision can include three aspects: the number of slave terminals, the amount of data from those terminals, and the links on which each slave terminal is located. specifically:

1. The offload decision server determines the number of TCPs connected to the sender and the sender (that is, the number of required slave terminals) through comprehensive calculation based on the received context information. When the delay requirement of the service is not high, fewer slave terminals may be used. When the service requires a high delay, the number of slave terminals may be appropriately increased to increase the download link rate.

2. After receiving the data sent by the context server, the distribution decision server integrates the calculation according to the type of the service. If the transmission bandwidth required by the service is B, the database shows that only the N terminals are suitable for transmission, and the transmission bandwidth is ^, then the traffic allocated by the terminal is as follows:

Ρ = Β ^ 3⁄4 ^

Β _{1 +} Β ₂ + ... + Β _Ν

408: The media server offloads the data according to the offloading decision provided by the offload decision server, and adds a transmission sequence number to each stream to transmit to the master terminal or the slave terminal through different links.

It can be understood that the data to be offloaded includes two types, one is sent directly from the media server to the main terminal, and the other is sent from the terminal to the main terminal. The data received from the terminal can be directly forwarded to the master terminal, and the slave terminal can only be responsible for receiving and forwarding data without storing data.

Since data is transmitted over multiple links using parallel TCP, each link uses a different network, and the network signal, transmission bandwidth, and delay may be different. This will cause the data not to arrive at the primary terminal sequentially, that is, the out-of-order will occur. phenomenon. This will make it difficult for the main terminal to reorganize the data. In order to solve this problem, the embodiment of the present invention provides a solution: The transmitted data is added to the header, as shown in the following table.

Table 1 header field 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32

ID NUM

IP OF DELAY CLIENT

IP OF MASTER

DATA

The fields in Table 1 above are defined as follows:

ID NUM indicates the label of the transmitted data segment, which is added when dividing the data segment. This identifier is used to ensure that the data segment will not be repeatedly transmitted by multiple links, nor will it be lost, and will also be brought to the receiving end. Convenient.

STREAM NUM indicates that each link is connected to a socket (socket) descriptor, and is set to the value of the connection socket descriptor of the link if the transmission is not faulty.

IP OF RELAY CLIENT indicates the IP (Internet Protocol) address of the slave terminal. This IP address allows the media server to find the destination address of the link. It also allows the master terminal to learn the path of data forwarding to ensure the correct transmission of data.

IP OF MASTE indicates the final destination address of the data transmission, that is, the address of the master terminal.

DATA indicates the data to be transferred.

409: The data received by the primary terminal is first placed in the cache, and then the data in the cache is sorted, and the original data is restored. The sorting method may be sorted according to the above ID NUM order, and a more detailed example of the scheme for restoring data will be given in the subsequent embodiment.

It can be understood that, in the data transmission process, if the master terminal discovers a new slave terminal that can be cooperatively transmitted, the offload decision server can be notified at any time, and the offload decision server instructs the media server to increase. The new transmission link is re-segmented; to add a new transmission link, refer to the slave-side offloading scheme in this embodiment. During the data transmission process, the slave terminal detects the downlink transmission link, and the master terminal detects the uplink. When the data transmission condition is not met, the offload decision server may be notified to stop or release the link, and the traffic is re-segmented.

In the following embodiments, the technical contents involved in several steps in the foregoing flow shown in Fig. 4 will be described in more detail.

1. For the process of the concurrent system formed between the master terminal and the slave terminal and the media server in the 404 medium domain network, refer to FIG. 6 for the structure of the concurrent server structure: The media server works in the passive open mode on the well-known port. After receiving the connection request from the client, the server allocates a temporary port for this connection, so the port used for listening will be released and continue to listen to the next request. This mode of operation is implemented by using a parent-child process in Linux, where the well-known port works on the parent process, and the other terminals (the master terminal and the slave terminal) work on the child process.

The signaling process for the terminal to initiate a session, as shown in Figure 7, includes the following steps:

701: Personal area network initialization.

The personal area network initialization includes: the primary terminal and the secondary terminal within the personal area network register with the media server, and the terminal establishes a connection with the primary terminal of the personal area network and transmits its own context information to the terminal.

702: The primary terminal in the personal area network initiates a session request. The session requests a distribution decision server that is sent to the primary terminal to trigger heterogeneous network convergence decisions. The heterogeneous network convergence decision results will be embodied in the subsequent split-flow decision and data transmission phases.

703: The offload decision server obtains context information from the context server, and performs a traffic splitting decision result according to the service feature, the terminal device information, and the network information of the session request.

Second, regarding the recovery of the original data by the main terminal, an implementation example is also given in the embodiment of the present invention: The result of the splitting decision is implemented by the media server. The media server processes the data according to the offloading decision and distributes it to different networks. Finally, the master terminal sorts and reorganizes the data within the personal area network. After receiving data on the master device side, the received data needs to be sorted. The sorting process can be as follows: The data received by the master terminal is first placed in the cache set by the program, and if the buffer area is full, the data overflows and the reception is suspended. Data; if the buffer is not full, the received data is stored in the cache. Finally, the original data is restored according to the sorting algorithm. The specific process of recovering data from the main terminal, as shown in Figure 8, may include the following steps: 801: The primary terminal receives data. It can be understood that the data received here may be sent directly from the media server or may be forwarded from the terminal.

802: Check if the cache set by the program is full. If yes, that is: if the buffer is full, block the link, stop data reception, and then enter 801; otherwise, enter 803.

803: Put the received data into the cache.

804: Unpacking the received data to obtain a data segment label ID NUM, determining whether it needs to be written to the disk according to the ID NUM, and determining whether to write to the disk as follows: if the ID of the data in the disk is NUM and the currently received NUM If the ID is continuous, the received data will be unpacked and stored in the disk. If the currently received data cannot be written to the disk, the data will remain in the cache, wait for it to be written, and then write to the disk, and then enter 801.

Understandably, after all the data is written to disk, the original data is restored on disk.

805: After the data is written to the disk, determine whether the written data is the end of the data packet, if yes, close the corresponding link of the data packet, enter 806; if not, delete the data in the above-mentioned written disk in the cache Pack, then go to 801.

806: Determine whether the link is all closed. If yes, it is determined that the data transmission ends, and the process ends. If no, go to 801.

An embodiment of the present invention provides a terminal, as shown in FIG. 9, including:

a connection establishing unit 901, configured to establish a connection between the primary terminal and the media server by using the first network; the first network is a network used by the primary terminal to connect to the media server;

The service request sending unit 902 is configured to send a service request to the media server after the connection establishing unit 901 establishes a connection with the media server;

The detecting unit 903 is configured to detect whether there is a slave terminal that establishes a connection with the media server through the second network;

The cooperation request sending unit 904 is configured to: after the detecting unit 903 detects that the slave terminal establishes a connection with the media server by using the second network, send a coordinated transmission request to the branching decision server; the second network is connected to the slave terminal a network of the media server;

The information obtaining unit 905 is configured to acquire context information of the slave terminal from the establishment of the personal area network by the slave terminal, and the information sending unit 906 is configured to: use the context information of the master terminal and the slave terminal in the personal area network. Sending to the offloading decision server; the context information of the master terminal and the slave terminal is used to perform the offloading decision; the result of the offloading decision is used to split the original data corresponding to the service request into the first data and the second data;

The data receiving unit 907 is configured to receive first data that is sent by the media server to the primary terminal, and receive the second data that is forwarded by the secondary terminal from the media server.

The data recombining unit 908 is configured to recombine the first data and the second data to obtain original data.

Optionally, the foregoing first data and the second data include: a label for indicating a data segment of the first data or the second data in the original data;

The data recombining unit 908 is configured to sort the first data and the second data according to the above label to obtain the original data.

Optionally, the second data packet received by the data receiving unit 907 further includes: a socket descriptor for indicating a path through which the second data packet passes, an address of the slave terminal, and an address of the master terminal.

Optionally, the information acquiring unit 905 is further configured to: if the detecting unit 903 detects a new slave terminal, obtain the context information of the new slave terminal after the slave terminal is added to the personal area network;

The information sending unit 906 is further configured to send the context information of the new slave terminal to the foregoing offload decision server.

The embodiment of the present invention further provides a media server, as shown in FIG. 10, including:

a service request receiving unit 1001, configured to receive a service request of the primary terminal;

The data determining unit 1002 is configured to determine original data corresponding to the service request received by the service request receiving unit 1001;

The decision receiving unit 1003 is configured to receive a result of the offloading decision delivered by the offload decision server. The foregoing offloading decision is determined by the foregoing offload decision server according to the context information of the primary terminal and the context information of the secondary terminal in the same domain network as the primary terminal;

The splitting unit 1004 is configured to split the original data determined by the data determining unit 1002 into the first data and the second data according to the result of the splitting decision received by the decision receiving unit 1003.

The data transmitting unit 1005 is configured to send the first data to the primary terminal, and send the second data to the secondary terminal.

Further, as shown in FIG. 11, the foregoing media server further includes:

The labeling unit 1101 is configured to split the original data into the first data and the second data after the splitting unit 1004. A label for indicating a data segment of the first data or the second data in the original data is added to the first data and the second data, respectively.

Optionally, the result of the foregoing offloading decision is a first ratio, where the first ratio is a ratio of a transmission bandwidth of a network where the master terminal and the slave terminal respectively belong to a total bandwidth;

The splitting unit 1004 is configured to split the original data into the first data and the second data according to the first ratio, and the ratio of the data amount of the first data to the data amount of the original data is equal to the first ratio.

The embodiment of the present invention further provides a traffic distribution decision server. As shown in FIG. 12, the method includes: an information receiving unit 1201, configured to receive context information of a master terminal, and a context of the slave terminal in the same domain network as the master terminal. Information

The decision determining unit 1202 is configured to determine, according to the context information of the master terminal, and the offloading decision of the original data corresponding to the service request of the master terminal in the context information of the slave terminal in the same domain network as the master terminal;

The decision sending unit 1203 is configured to send the result of the foregoing offloading decision to the media server, and instruct the media server to specify a service request corresponding to the primary terminal according to the splitting policy. The original data is split.

Optionally, the context information includes: a transmission bandwidth indicating a network where the context corresponding terminal is located; the foregoing determining determining unit 1202 is configured to use the first ratio as a result of the offloading decision; the first ratio is the main terminal and the slave terminal respectively The ratio of the transmission bandwidth to the total bandwidth. The total bandwidth is the sum of the transmission bandwidth of the primary terminal and the network where the secondary terminal is located.

The embodiment of the present invention further provides a multi-stream concurrent transmission system, as shown in FIG. 13, comprising: a media server 1301 and a offload decision server 1302;

The foregoing media server is a media server according to any one of the embodiments of the present invention, and the traffic distribution decision server is a traffic distribution decision server according to any one of the embodiments of the present invention.

The embodiment of the present invention further provides a terminal, which is used as a master terminal, as shown in FIG. 14, comprising: a receiver 1401, a transmitter 1402, and a processor 1403;

The processor 1403 is configured to: after the primary terminal establishes a connection with the media server by using the first network, instruct the transmitter 1402 to send a service request to the media server; the first network is that the primary terminal is connected to the media server. The used network; after the primary terminal detects the secondary terminal that establishes the connection with the media server through the second network, the indication transmitter 1402 sends a coordinated transmission request to the branching decision server, and acquires the context information of the secondary terminal from the establishment of the personal area network of the secondary terminal. Transmitting context information of the master terminal and the slave terminal in the personal area network to the offload decision server; the master terminal and the slave terminal The context information is used to perform a offloading decision; the result of the offloading decision is used to split the original data corresponding to the service request into the first data and the second data; the second network is connected to the slave terminal to the a network of the media server; receiving, by the receiver 1401, first data sent by the media server to the master terminal, receiving second data from the media server forwarded by the slave terminal; the processor 1403 The data and the second data are recombined to obtain the original data.

Optionally, the first data and the second data include: a label for indicating a data segment of the first data or the second data in the original data;

The processor 1403 reassembles the first data and the second data to obtain the original data. The processor 1403 sorts the first data and the second data according to the label to obtain original data.

Optionally, the second data packet further includes: a socket descriptor for indicating a path through which the second data packet passes, an address of the slave terminal, and an address of the master terminal.

Optionally, the processor 1403 is further configured to: if the master terminal detects a new slave terminal, add the new slave terminal to the personal area network, and obtain context information of the new slave terminal, And instructing the transmitter 1402 to send the context information of the new slave terminal to the offload decision server.

The embodiment of the present invention further provides a media server, as shown in FIG. 15, comprising: a receiver 1501, a transmitter 1502, and a processor 1503;

The processor 1503 is configured to receive, by the receiver 1501, a service request of the primary terminal, and determine the original data corresponding to the service request, and receive, by the receiver 1501, a result of the offloading decision delivered by the offloading decision server, where the offloading decision is performed. Determining, by the branching decision server, the context information of the primary terminal and the context information of the secondary terminal in the same domain network as the primary terminal; the processor 1503, according to the result of the offloading decision, the original Data split into first number And the second data; the indication transmitter 1502 sends the first data to the primary terminal, and sends the second data to the secondary terminal.

Further, the processor 1503 is further configured to separately add, in the first data and the second data, the first data and the second data to represent the first data. Or the label of the data segment of the second data in the original data.

Optionally, the result of the offloading decision is a first ratio, where the first ratio is a ratio of a transmission bandwidth of a network where the primary terminal and the secondary terminal are located to a total bandwidth;

The processor 1503 is specifically configured to split the original data into first data and second data according to the first ratio, and a ratio of a data amount of the first data to a data amount of the original data is equal to The first ratio.

The embodiment of the present invention further provides a offload decision server, as shown in FIG. 16, comprising: a receiver 1601, a transmitter 1602, and a processor 1603;

The processor 1603 is configured to receive, by the receiver 1601, context information of the primary terminal and context information of the secondary terminal in the same domain network as the primary terminal, where the processor 1603 is configured according to the primary terminal. Context information and a branching decision of the original data corresponding to the service request of the master terminal in the context information of the slave terminal in the same domain network as the master terminal; the transmitter 1602 is instructed to send the result of the offload decision to the The media server instructs the media server to perform splitting of the original data corresponding to the service request of the primary terminal according to the splitting policy.

In the above embodiment, the primary terminal and the secondary terminal respectively use different network accesses, and the primary terminal establishes a personal area network with the secondary terminal, and the primary terminal sends the context information of the terminal in the personal area network to the decision server through the context server, and the decision server The offloading decision is made, and the media server splits the original data packet according to the result of the offloading decision, and then sends it to the main terminal through different links, and then is restored by the main terminal. Raw data. Data can be transmitted concurrently, making full use of the network resources of the slave terminals that can assist the transmission around the primary terminal, which can improve end-to-end throughput and network resource utilization.

Optionally, the context information includes: indicating a transmission bandwidth of the network where the context corresponding terminal is located; the processor 1603 is determined according to context information of the primary terminal and context information of the secondary terminal that is in the same domain network as the primary terminal The offloading decision of the original data corresponding to the service request of the primary terminal includes: the processor 1603 uses the first ratio as a result of the offloading decision; the first ratio of the transmission bandwidth of the primary terminal and the slave terminal respectively occupying the total bandwidth Proportion, the total bandwidth is the sum of the transmission bandwidths of the primary terminal and the network where the secondary terminal is located.

It should be noted that the above devices are only divided according to functional logic, but are not limited to the above divisions, as long as the corresponding functions can be implemented; in addition, the specific names of the functional units are only for the purpose of distinguishing from each other, and are not used. To limit the scope of protection of the present invention.

In addition, those skilled in the art can understand that all or part of the steps in implementing the foregoing method embodiments may be performed by a program to instruct related hardware, and the corresponding program may be stored in a computer readable storage medium. The storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the embodiments of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

1. A multi-stream concurrent transmission method, characterized by including:

The main terminal establishes a connection with the media server through the first network and sends a service request to the media server; the first network is the network used by the main terminal to connect to the media server;

After detecting the slave terminal that establishes a connection with the media server through the second network, the master terminal sends a collaborative transmission request to the offload decision server, and establishes a personal area network with the slave terminal to obtain the context information of the slave terminal, and transfers the context information to the slave terminal in the personal area network. The context information of the master terminal and the slave terminal is sent to the offload decision server; the context information of the master terminal and the slave terminal is used to execute the offload decision; the result of the offload decision is used to split the original data corresponding to the business request is the first data and the second data; the second network is the network connecting the slave terminal to the media server;

The main terminal receives the first data sent to the main terminal by the media server, and receives the second data from the media server forwarded by the slave terminal;

2. The method according to claim 1, characterized in that, the first data and the second data include: a label used to represent the data segment of the first data or the second data in the original data; The main terminal reorganizes the first data and the second data to obtain the original data, including: the main terminal sorts the first data and the second data according to the labels to obtain the original data.

3. The method according to claim 2, characterized in that the second data packet further includes: a socket descriptor used to represent the path followed by the second data packet, the address of the slave terminal and the address of the master terminal. .

4. The method according to any one of claims 1 to 3, further comprising: if the master terminal detects a new slave terminal, the master terminal adds the new slave terminal to the domain The network obtains the context information of the new slave terminal and sends the context information of the new slave terminal to the offload decision server.

5. A multi-stream concurrent transmission method, characterized by including:

The media server receives the service request from the main terminal and determines the original data corresponding to the service request; the media server receives the result of the offload decision issued by the offload decision server, and the offload decision is made by the offload decision server based on the context of the main terminal information and is in the same location as the main terminal Determine the context information of slave terminals within a domain network;

The media server sends the first data to the master terminal and the second data to the slave terminal.

6. The method according to claim 5, characterized in that after splitting the original data into first data and second data, it further includes:

The media server adds a label to the first data and the second data respectively to represent the data segment of the first data or the second data in the original data.

7. The method according to claim 5 or 6, characterized in that, the result of the offload decision is a first ratio, and the first ratio is the ratio of the transmission bandwidth of the network where the master terminal and the slave terminal are located to the total bandwidth. ;

The media server splits the original data into first data and second data according to the first ratio, and the ratio of the data amount of the first data to the data amount of the original data is equal to the first ratio.

8. A multi-stream concurrent transmission method, characterized by including:

The offload decision server receives the context information of the master terminal and the context information of the slave terminal in the same domain network as the master terminal;

The offloading decision server determines the offloading decision of the original data corresponding to the main terminal's service request based on the context information of the main terminal and the context information of the slave terminal in the same domain network as the main terminal;

The offloading decision server sends the result of the offloading decision to the media server, instructing the media server to split the original data corresponding to the service request of the main terminal according to the splitting policy specified.

9. The method according to claim 8, characterized in that the context information includes: indicating the transmission bandwidth of the network where the context corresponds to the terminal;

The offload decision of determining the original data corresponding to the service request of the master terminal based on the context information of the master terminal and the context information of the slave terminal in the same domain network as the master terminal includes: The offload decision server uses the first ratio as the result of the offload decision; the first ratio is the proportion of the transmission bandwidth of the network where the master terminal and the slave terminal are located to the total bandwidth, and the total bandwidth is the transmission bandwidth of the network where the master terminal and the slave terminal are located. The total bandwidth.

10. A terminal, characterized in that it includes:

A connection establishment unit, configured to establish a connection between the main terminal and the media server through a first network; the first network is a network used by the main terminal to connect to the media server;

The service request sending unit is used to send a service request to the media server after the connection establishment unit establishes a connection with the media server;

A detection unit, used to detect whether there is a slave terminal that establishes a connection with the media server through a second network; the second network is a network where the slave terminal is connected to the media server;

A collaboration request sending unit, configured to send a collaboration transmission request to the offload decision server after the detection unit detects the slave terminal that establishes a connection with the media server through the second network;

The information acquisition unit is used to establish a personal area network with the slave terminal to obtain the context information of the slave terminal; the information sending unit is used to send the context information of the master terminal and the slave terminal in the personal area network to the offload decision server; The context information of the master terminal and the slave terminal is used to execute the offload decision; the result of the offload decision is used to split the original data corresponding to the business request into first data and second data;

A data receiving unit, configured to receive the first data sent by the media server to the main terminal, and receive the second data from the media server forwarded by the slave terminal;

A data reorganization unit is used to reorganize the first data and the second data to obtain original data.

11. The terminal according to claim 10, characterized in that, the first data and the second data include: a label used to represent the data segment of the first data or the second data in the original data; A data reorganization unit is used to sort the first data and the second data according to the labels to obtain original data.

12. The terminal according to claim 11, characterized in that,

The second data packet received by the data receiving unit also includes: a socket descriptor used to represent the path traveled by the second data packet, the address of the slave terminal, and the address of the master terminal.

13. The terminal according to any one of claims 10 to 12, characterized in that,

The information acquisition unit is also configured to: if the detection unit detects a new slave terminal, wait until the slave terminal The information sending unit is also configured to send the context information of the new slave terminal to the offload decision server.

14. A media server, characterized by including:

The service request receiving unit is used to receive the service request from the main terminal;

A data determination unit, used to determine the original data corresponding to the service request received by the service request receiving unit;

The decision receiving unit is configured to receive the result of the offload decision issued by the offload decision server. The offload decision is made by the offload decision server based on the context information of the main terminal and the slave in the same domain network as the main terminal. The context information of the terminal is determined;

A splitting unit, configured to split the original data determined by the data determination unit into first data and second data according to the result of the diversion decision received by the decision receiving unit;

A data sending unit, configured to send the first data to the master terminal and the second data to the slave terminal.

15. The media server according to claim 14, further comprising: a labeling unit, configured to split the original data into the first data and the second data by the splitting unit. Labels used to represent the data segments of the first data or the second data in the original data are added to the data and the second data respectively.

16. The media server according to claim 14 or 15, characterized in that, the result of the offload decision is a first ratio, and the first ratio is the ratio of the transmission bandwidth of the network where the master terminal and the slave terminal are located to the total bandwidth. Proportion;

The splitting unit is configured to split the original data into first data and second data according to the first ratio, and the ratio of the data amount of the first data to the data amount of the original data is equal to the Describe the first ratio.

17. A diversion decision-making server, characterized by including:

An information receiving unit, configured to receive the context information of the master terminal and the context information of the slave terminal in the same domain network as the master terminal;

A decision-making unit configured to determine the original data corresponding to the service request of the master terminal based on the context information of the master terminal and the context information of the slave terminal in the same domain network as the master terminal. diversion decisions;

A decision sending unit, configured to send the result of the offload decision to the media server, and instruct the media server to split the original data corresponding to the service request of the main terminal according to the splitting policy specified.

18. The offload decision server according to claim 17, characterized in that the context information includes: indicating the transmission bandwidth of the network where the context corresponds to the terminal;

The decision determination unit is configured to use the first ratio as the result of the offload decision; the first ratio is the ratio of the transmission bandwidth of the network where the master terminal and the slave terminal are located to the total bandwidth, and the total bandwidth is the ratio of the master terminal and the slave terminal. The total transmission bandwidth of the network where the terminal is located.

19. A multi-stream concurrent transmission system, including: a media server and a distribution decision server, characterized by:

The media server is the media server of any one of claims 14 to 16, and the offload decision server is the offload decision server of claim 17 or 18.