WO2011144164A1

WO2011144164A1 - Method, apparatus and system for data transmission

Info

Publication number: WO2011144164A1
Application number: PCT/CN2011/075202
Authority: WO
Inventors: 王靖宇; 吴君怡; 赵永祥; 钱明生
Original assignee: 华为技术有限公司
Priority date: 2010-08-13
Filing date: 2011-06-02
Publication date: 2011-11-24
Also published as: CN101917742B; CN101917742A

Abstract

The embodiments of the invention disclose a method for data transmission, which is used for reducing transmission cost and service delay. The method in the embodiments of the invention comprises the following steps: a media processing device receives a service request sent by a user terminal, wherein the media processing device is located in a wireless access network where the user terminal is located; the media processing device judges whether it has saved the service data corresponding to the service request or not; and if the service data is saved in the media processing device, the media processing device sends the service data to the user terminal. In addition, the embodiments of the invention disclose an apparatus and a system for data transmission. The embodiments of the invention can effectively reduce the transmission cost and service delay.

Description

The present application claims the priority of a Chinese patent application filed on August 13, 2010 by the Chinese Patent Office, Application No. 201010254376.7, entitled "Data Transmission Method, Apparatus and System", the entire contents of which is incorporated herein by reference. This is incorporated herein by reference. . Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, device, and system. Background technique

Referring to FIG. 1, a traditional UMTS (Universal Mobile Telecommunications System)/High Speed Packet Access (HSPA) media network architecture includes: a radio access network (RAN), a backhaul Backhaul transmission network, backbone (Backbone) transmission network, packet switching (PS, Packet Switch) core network, content distribution network (CDN, Content Distributed Network), service platform and Internet service provider.

The RAN includes a base station (NodeB) and a radio network controller (RNC, Radio Network Controller), and the PS core network includes a general packet radio service support node (SGSN) and a general packet radio service gateway support node (GGSN). , Gateway GPRS Support Node ).

When the user terminal requests to perform the PS service, the service request arrives at the service platform through the RAN, the Backbone transmission network, the PS core network, and the CDN, and the service platform obtains the corresponding service data from the Internet service provider (Internet SP) according to the service request. Or the corresponding cache service data is obtained from the CDN, and the service data is sent to the user terminal through the CDN, the PS core network, the Backbone transmission network, and the RAN.

However, in the above data transmission process of the prior art, the service data passes through the CDN, the PS core network, the Backbone transmission network, and the RAN in the sending process, thereby increasing the occupation of network resources and improving the transmission cost;

Secondly, because the service data will pass through the CDN, the PS core network, the Backbone transmission network, and the RAN during the transmission process, the service delay is large. Summary of the invention

Embodiments of the present invention provide a data transmission method, device, and system, which can reduce transmission cost and reduce service delay.

In one aspect, a data transmission method is provided, including: the media processing device receives a service request sent by a user terminal, where the media processing device is located in a radio access network where the user terminal is located; and the media processing device determines whether to save The service data corresponding to the service request; if the media processing device stores the service data, the media processing device sends the service data to the user terminal.

On the other hand, a data transmission method is provided, including: a content distribution network CDN receiving a service request of a user terminal sent by a service platform; the CDN acquiring information of a media processing device corresponding to the user terminal, where the media processing device is located a radio access network in which the user terminal is located; the CDN redirects the user terminal to the media processing device.

In another aspect, a media processing device is provided, where the media processing device is located in a radio access network where the user terminal is located, and the media processing device includes: a first receiving unit, configured to receive a service request sent by the user terminal; a first determining unit, configured to determine whether the service data corresponding to the service request received by the first receiving unit is saved, where the first sending unit is configured to: when the first determining unit determines that the service data is saved Sending the service data to the user terminal.

In another aspect, a content distribution network CDN is provided, including: a service request receiving unit, configured to receive a service request of a user terminal sent by a service platform; and an information querying unit, configured to acquire information about a media processing device corresponding to the user terminal The media processing device is located in the radio access network where the user terminal is located, and the redirection unit is configured to redirect the user terminal to the media processing device according to the information acquired by the information query unit.

In still another aspect, a data transmission system is provided, comprising: a media processing device, and a CDN. In the embodiment of the present invention, when the media processing device saves the service data requested by the user terminal locally, the media processing device directly sends the saved service data to the user terminal through the radio access network, because the media processing device is located at the user terminal. The wireless access network enables the service data to be transmitted through the core network and the backbone transmission network, thereby saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing the transmission cost, reducing the service delay, and improving the user experience. .

DRAWINGS 1 is a schematic structural diagram of a network in the prior art;

2 is a schematic structural diagram of a network according to an embodiment of the present invention;

3 is a schematic diagram of an embodiment of a data transmission method of the present invention;

4 is a schematic diagram of another embodiment of a data transmission method of the present invention;

5 is a schematic diagram of another embodiment of a data transmission method of the present invention;

6 is a schematic diagram of another embodiment of a data transmission method of the present invention;

7 is a schematic diagram of another embodiment of a data transmission method of the present invention;

8 is a schematic diagram of an embodiment of a media processing device of the present invention;

9 is a schematic diagram of another embodiment of a media processing device of the present invention;

Figure 10 is a schematic view of an embodiment of the CDN of the present invention;

Figure 11 is a schematic illustration of one embodiment of a data transmission system of the present invention.

detailed description

Embodiments of the present invention provide a data transmission method, device, and system for reducing transmission cost and reducing service delay.

Referring to FIG. 2, the network structure in the embodiment of the present invention may include:

Radio access network, packet switched core network, backbone transmission network, content distribution network CDN, service platform and Internet service provider, optionally, may also include a Policy and Charging Rules Function (PCRF) entity .

The radio access network and the packet switched core network are connected through a backbone transmission network. The packet switched core network communicates with the CDN via the Gi interface. The media processing device communicates with the service platform and the CDN through the Gi interface. Optionally, the media processing device can also communicate with the PCRF entity through the Gi interface.

The radio access network includes a base station, an RNC, and a media processing device. The base station and the RNC can be used to complete wireless access of the user. The media processing device can be used to locally cache the service data requested by the user terminal, and access the wireless data. The network sends the cached data to the user terminal. Optionally, the media processing device can also be used for media service acceleration, and content adaptation and/or code stream selection for the service data to be sent. The media processing device may be located on the RNC side, may be built in the RNC, or may be set independently of the RNC. Each RNC may correspond to one media processing device, or multiple RNCs may correspond to one media processing device. The packet switching core network includes an SGSN and a GGSN, which can be used to complete access authentication of the PS user.

The service platform can be used to complete user service access management.

The CDN can be used to complete the service store delivery and redirect the user terminal to the appropriate media processing device.

The PCRF entity can be used to generate a user policy and send it to the corresponding media processing device.

It should be noted that the network structure shown in FIG. 2 can also be applied to subsequent embodiments of the present invention, and the solutions in all embodiments of the present invention are applicable not only to the UMTS network but also to other types of networks, such as long-term evolution. Network, etc., will not be described later.

The data transmission method in the embodiment of the present invention is described in detail below. Referring to FIG. 3, a specific embodiment of the data transmission method of the present invention includes:

301. The media processing device receives a service request sent by the user terminal.

When the user terminal initiates a service request to the network side to request the service, the media processing device may obtain the service request sent by the user terminal, and the service described in this embodiment and the following embodiments may be a packet service, for example, in actual The application may be a mobile data service, a video service, an audio service, etc., and is not limited herein.

It should be noted that, in this embodiment, the media processing device is located in a radio access network where the user terminal is located.

302. The media processing device determines whether the service data is saved. If yes, go to step 303. After receiving the service request sent by the user terminal, the media processing device may determine the service data corresponding to the service request, and then the media processing device may determine whether These business data are saved, for example, whether the corresponding business data is cached locally.

303. The media processing device sends service data to the user terminal.

When the media processing device saves the service data, the media processing device may send the service data to the user terminal through the radio access network, for example, may be pushed to the user terminal.

In this embodiment, when the media processing device saves the service data requested by the user terminal locally, the media processing device directly sends the saved service data to the user terminal through the radio access network, because the media processing device is located at the user terminal. The radio access network enables the service data to be transmitted through the core network and the backbone transmission network, thereby saving the bandwidth of the backbone transmission network and the traffic of the core network. Reduced transmission costs, reduced business latency, and improved user experience.

For ease of understanding, the data transmission method in the embodiment of the present invention is described in another embodiment. Referring to FIG. 4, another embodiment of the method of the present invention includes:

401. The media processing device receives preset service data.

It should be noted that, in this embodiment, the media processing device is located in a radio access network where the user terminal is located. The preset service data is sent by the CDN to the media processing device, and the preset service data, for example, may be part of the most popular service data, or may be the service data requested by the specific user terminal, which is not limited herein.

After receiving the preset service data sent by the CDN, the media processing device can save the preset service data. For example, the preset service data can be locally cached.

402. The media processing device receives a user policy.

The user policy may be generated by the PCRF entity according to the terminal information of the user terminal.

For example, the terminal information may include information such as a terminal type, a terminal operating system, and/or a terminal software version. The terminal information may be sent by the service platform to the PCRF entity, or may be sent by the PCRF entity to the terminal international mobile according to the RNC to the PCRF entity. The device identifier IMEI information is obtained by the query device authentication registration server EIR, which is not limited herein.

After the UEF entity obtains the terminal information, a user policy may be generated, according to which the user policy may perform corresponding service processing for different user priority information and different QoS (Quality of Service) information.

It should be noted that, in addition to generating a user policy according to the terminal information, the PCRF entity may further obtain the subscription information of the user from the home user register, and generate a user policy in combination with the subscription information.

The media processing device can obtain the user policy generated by the PCRF entity from the PCRF entity.

403. The media processing device receives a service request sent by the user terminal.

When the user terminal initiates a service request to the network side to request a service, the media processing device may obtain the service request sent by the user terminal.

404, the media processing device determines whether the service data corresponding to the service request is saved, if yes, go to step 407, if no, go to step 405;

After the media processing device receives the service request sent by the user terminal, the service request may be determined. The corresponding service data, and then the media processing device can determine whether the service data is saved, for example, determining whether the service data corresponding to the service request is cached locally.

405. The media processing device sends the service request to the CDN.

When the media processing device determines that the corresponding service data is not saved, the media processing device forwards the service request to the CDN.

406, the media processing device receives the service data sent by the CDN and proceeds to step 407;

In this embodiment, since the corresponding service data can be stored in the CDN, the media processing device can receive the corresponding service data from the CDN after sending the service request to the CDN.

After the media processing device receives the corresponding service data from the CDN, it can also determine whether the service data meets the preset condition. If yes, the service data can be stored locally in the media processing device. In actual application, the specific pre- The condition is set, for example, the threshold of the service is reached, and the details are not limited herein.

407. The media processing device acquires air interface resource information and/or transmission resource information.

After the media processing device determines that the service data is saved, or the service data is obtained from the CDN, the air interface resource information of the cell where the user terminal is located and/or the transmission resource information of the NodeB to the RNC may be obtained, that is, the air interface resource of the cell where the user terminal is located may be obtained. The information, or the information about the transmission resource of the NodeB to the RNC, or the information about the air interface resource of the cell where the user terminal is located and the transmission resource information of the NodeB to the RNC.

It should be noted that the media processing device may obtain the information from the RNC, and may obtain the information from other network elements of the wireless access network, which is not limited herein.

408. The media processing device sends the content data after the content adaptation and/or the code stream is selected.

After the media processing device obtains the air interface resource information and/or the transmission resource information, the content data is adapted and/or the code stream is selected, that is, the content adaptation may be performed, or the code stream may be selected, or Content adaptation and code stream selection are possible. The media processing device may also perform content adaptation and/or code stream selection on the service data in combination with the previously obtained user policy after acquiring the air interface resource information and/or the transmission resource information.

In this embodiment, according to the user policy, the corresponding service processing may be performed for different user priority information and different QoS information, so the media processing device may perform the user policy according to the air interface resource information and/or the transmission resource information. Content adaptation and/or code stream selection. For example, the user policy of the current user is "Gold card user, which has the highest priority. When the network environment deteriorates, at least the service transmission rate of the user is guaranteed to be 2 Mbit/s. When the network environment is good, the service of the user can be transmitted at the highest. The rate is increased to 20 Mbit/s". Assuming that the current user is requesting to play the network video, after the media processing device obtains the air interface resource information and/or the transmission resource information, it can determine how the current network environment is, if the air interface resource information and/or the transmission resource. The information is higher than the first threshold, indicating that the network environment is good, and the transmission rate of the current user's service can be increased, that is, the code rate of the network video requested by the user can be increased, up to 20 Mbit/s, if the air interface resource information and If the transmission resource information is lower than the second threshold, indicating that the network environment is degraded, the transmission rate of the current user's service needs to be reduced, but at least the transmission rate of 2 Mbit/s is required, so that the network video requested by the user can be performed. Trimmed or compressed so that its code rate is 2Mbit/s.

It should be noted that the content adaptation process and/or the code stream selection process in this embodiment are described in some examples. It can be understood that, in practical applications, the media processing device may also be in other manners. The content adaptation and/or the code stream selection are performed, and the specific process is not limited herein.

In this embodiment, when the media processing device saves the service data requested by the user terminal locally, the media processing device directly sends the saved service data to the user terminal through the radio access network, because the media processing device is located at the user terminal. The wireless access network enables the service data to be transmitted through the core network and the backbone transmission network, thereby saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing the transmission cost, reducing the service delay, and improving the user experience;

In the embodiment, the media processing device performs the content adaptation and/or the code stream selection, and the media processing device obtains the information of the wireless air interface resource from the RNC that belongs to the radio access network more timely and accurately, thereby improving Resource utilization.

Referring to FIG. 5, another specific example of the embodiment of the present invention includes:

501. Receive a service request sent by a service platform;

When the service data corresponding to the service request of the user terminal is cacheable content, the service platform sends a service request to the CDN.

502. Obtain information about a media processing device.

After receiving the service request, the CDN can obtain information about the media processing device corresponding to the user terminal, where the media processing device is located in the radio access network where the user terminal is located.

It should be noted that the information of the media processing device may be location information of the media processing device. In an actual application, for example, the CDN may query the information of the media processing device corresponding to the user terminal from the locally saved information, or may query the PCRF entity for the information of the media processing device corresponding to the user terminal, or may also be from the SGSN. The information obtained by the media processing device is obtained by the query, or is obtained by other means, and is not limited herein. For example, if the information of the media processing device corresponding to the user terminal is queried from the PCRF entity, the PCRF may hold the binding relationship between the IP address of the user terminal reported by the RNC and the RNC, and obtain the RNC where the user terminal is located according to the binding information, and further The information of the media processing device corresponding to the user terminal may be obtained according to the RNC where the user terminal is located.

503. Redirect the user terminal to the media processing device.

After the CDN obtains the information of the media processing device, the CDN can redirect the user terminal to the media processing device based on the information. For example, the CDN may send a message carrying the address information of the media processing device to the user terminal, and instruct the user terminal to send a service request to the media processing device after receiving the message.

After the CDN redirects the user terminal to the media processing device, the media processing device can transmit the service data to the user terminal through the radio access network.

The data transmission method in the embodiment of the present invention is described below with reference to a specific example. For details, refer to FIG. 6. Another embodiment of the method of the present invention includes:

601. The CDN sends preset service data to the media processing device.

It should be noted that, in this embodiment, the media processing device is located in a radio access network where the user terminal is located. The preset service data may be part of the most popular service data, or may be the service data requested by the specific user terminal, which is not limited herein.

602. The user terminal initiates the PDP activation, and the GGSN performs the access authentication on the user terminal. The user terminal initiates a PDP activation request to the SGSN/GGSN to request the mobile data service, and the GGSN performs the access authentication on the user terminal, and if the access authentication passes, the permission is allowed. The user terminal uses the service, and the specific access authentication process is not limited herein.

603. The RNC sends a binding relationship.

In this embodiment, the RNC can obtain the IP address of the user terminal because the data sent by the user terminal to the network side first passes through the RNC.

After obtaining the IP address of the user terminal, the RNC may send a binding relationship between the IP address of the user terminal and the RNC where the user terminal is located, that is, the binding relationship between the user terminal and the RNC serving the user terminal. 604. The RNC sends the terminal IMEI information.

In this embodiment, the RNC may send the IMEI information of the user terminal to the PCRF entity after sending the binding relationship or at the same time.

605. The PCRF entity acquires terminal information of the user terminal.

After obtaining the IMEI information sent by the RNC, the PCRF entity may query the EIR to obtain the terminal information of the user terminal according to the IMEI information of the user terminal. For example, the terminal information may include the terminal type, the terminal operating system, and/or the terminal. Software version information, etc.

606. The PCRF entity sends a user policy to the media processing device.

The PCRF entity generates a user policy according to the terminal information of the user terminal, and the user policy has the same meaning as the user policy described in the foregoing embodiment shown in FIG. 4, and details are not described herein again.

607. The user terminal sends a service request to the service platform.

When the user terminal initiates a service request to the network side to request a service, the user terminal sends the service request to the service platform.

608. The service platform determines whether the service data corresponding to the service request is cacheable content. In this embodiment, after receiving the service request sent by the user terminal, the service platform may determine the service type corresponding to the service request, and determine, according to the service type. Whether the service data corresponding to the service request is cacheable content, for example, the instant communication data is non-cacheable content, and the on-demand data is cacheable content. When it is determined that the requested service data is not cacheable content, steps 609, 610 are performed; when it is determined that the requested service data is cacheable content, step 611 is performed.

609. When determining that the requested service data is not cacheable content, the service platform sends a service request to the Internet SP.

When the service platform determines that the service data requested by the user terminal is not cacheable, the service SP needs to send a service directly to the user terminal, and the service platform sends a service request to the Internet SP.

610. The Internet SP sends the service data to the user terminal.

After receiving the service request sent by the service platform, the Internet SP acquires the corresponding service data according to the service request, and sends the service data to the user terminal, and the data transmission process ends.

611. The service platform sends a service request to the CDN.

When the service platform determines that the service data requested by the user terminal is cacheable content, the service platform The service request is sent to the CDN.

612. The CDN queries the PCRF entity, and obtains location information of the media processing device corresponding to the user terminal.

After receiving the service request sent by the service platform, the CDN may send a query request to the PCRF entity to obtain location information of the media processing device corresponding to the user terminal.

The information about the media processing device corresponding to the user terminal is obtained from the RNC where the user terminal is located, and the information is fed back to the CDN.

613. The CDN redirects the user terminal to the media processing device.

After determining the location information of the media processing device, the CDN can redirect the user terminal to the media processing device. For example, the CDN may send a message carrying the location information of the media processing device to the user terminal, and instruct the user terminal to send a service request to the media processing device after receiving the message.

614. The user terminal sends a service request to the media processing device.

In this embodiment, since the CDN redirects the user terminal to the media processing device in step 613, the user terminal sends a service request to the media processing device.

615. The media processing device determines whether the service data corresponding to the service request is saved.

After receiving the service request sent by the user terminal, the media processing device may determine whether the service data corresponding to the service request is saved.

616. When the media processing device does not save the service data requested by the user terminal, the media processing device sends the service request to the CDN.

If the media processing device does not store corresponding service data, the media processing device may send a service request to the CDN to request to obtain corresponding service data.

617. The CDN sends the service data to the media processing device.

After receiving the service request from the media processing device, the CDN sends the corresponding service data to the media processing device.

618. The media processing device acquires air interface resource information of a cell where the user terminal is located, and/or transmission resource information of the NodeB to the RNC.

In this embodiment, if the media processing device locally stores the corresponding service data, the service data may be directly obtained from the local device. If the media processing device does not store the corresponding service data, the media processing device may The CDN obtains the business data.

After the media processing device obtains the service data from the local device, or obtains the service data from the CDN, the media processing device queries the RNC to obtain the air interface resource information of the cell where the user terminal is located and/or the transmission resource information of the NodeB to the RNC.

619. The media processing device performs content adaptation and/or code stream selection on the service data according to the user policy according to the air interface resource information and/or the transmission resource information.

The process of content adaptation and/or code stream selection in this embodiment is consistent with the content described in step 408 in the foregoing embodiment shown in FIG. 4, and details are not described herein again.

620. The media processing device sends service data to the user terminal.

After the media processing device performs content adaptation and/or code stream selection on the service data, the processed service data may be sent to the user terminal.

The data transmission method in the embodiment of the present invention is described in another specific example. For details, please refer to FIG. 7. Another embodiment of the method of the present invention includes:

701-703, which are the same as steps 601-603 in the embodiment shown in FIG. 6, and are not described herein again;

704. The user terminal reports the terminal information to the service platform.

When the user terminal is started, the user terminal may send terminal information of the user terminal to the service platform. For example, the terminal information may include a terminal type, a terminal operating system, and/or terminal software version information.

705. The service platform reports the terminal information to the PCRF entity.

After the service platform obtains the terminal information from the user terminal, the service information may be reported to the PCRF entity. 706 ~ 720, which are the same as steps 606 ~ 620 in the embodiment shown in FIG. 6.

In this embodiment and the foregoing embodiment shown in FIG. 6, the PCRF entity obtains the terminal information of the user terminal in different manners. It can be understood that, in practical applications, the PCRF entity may also obtain other methods. Terminal information, not limited here.

The data transmission method in the embodiment of the present invention is described above. The corresponding related device is described below. Referring to FIG. 8, an example of the media processing device according to the embodiment of the present invention includes:

The first receiving unit 801 is configured to receive a service request sent by the user terminal.

The first determining unit 802 is configured to determine whether the service data corresponding to the service request received by the first receiving unit 801 is saved;

The first sending unit 803 is configured to send the service data to the user terminal when the first determining unit 802 determines that the service data is saved.

In this embodiment, when the user terminal initiates a service request to the network side to request the service, the first receiving unit 801 may obtain the service request sent by the user terminal, and the service described in this embodiment and subsequent embodiments may be The packet service, for example, may be a mobile data service, a video service, an audio service, or the like in an actual application, and is not limited herein.

After the first receiving unit 801 receives the service request sent by the user terminal, the service data corresponding to the service request may be determined, and then the first determining unit 802 may determine whether the service data is saved, for example, whether the corresponding cache is locally cached. Business data.

When the first determining unit 802 determines that the media processing device stores the service data, the first sending unit 803 may send the service data to the user terminal through the radio access network, for example, may be pushed to the user terminal. In this embodiment, when the first determining unit 802 determines that the service data requested by the user terminal is saved, the first sending unit 803 directly sends the saved service data to the user terminal through the radio access network, because the media processing device is located in the user. The radio access network where the terminal is located does not need to transmit the service data through the core network or the backbone transmission network, thereby saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing the transmission cost, reducing the service delay, and improving the service. user experience.

For ease of understanding, the media processing device in the embodiment of the present invention is described in another embodiment. For details, please refer to FIG. 9. Another embodiment of the media processing device of the present invention includes:

The specific functions of the first receiving unit 801, the first determining unit 802, and the first sending unit 803 in this embodiment are as described in the foregoing embodiment, and are not described herein again.

In this embodiment, the media processing device may further include:

The second receiving unit 901 is configured to receive preset service data sent by the CDN, and save the preset service data.

The second receiving unit 901 can receive preset service data from the CDN, and the preset service data is sent by the CDN to the second receiving unit 901, where the preset service data, for example, may be part of the most popular service data, or may be specific. The service data requested by the user terminal is not limited herein.

After receiving the preset service data sent by the CDN, the second receiving unit 901 can save the preset service data. For example, the preset service data can be locally cached.

In this embodiment, the media processing device may further include:

The second sending unit 903 is configured to: when the first determining unit 802 determines that the service data is not saved, send a service request to the CDN;

The third receiving unit 904 is configured to receive the service data corresponding to the service request sent by the CDN, and the third sending unit 905 is configured to send the service data received by the third receiving unit 904 to the user terminal.

When the first determining unit 802 determines that the service data is not saved, the second sending unit is triggered. When the 903 sends a service request to the CDN, the CDN feeds back the service data corresponding to the service request, and the third receiving unit 904 can receive the service data from the CDN, and then the third sending unit 905 can send the third receiving unit 904 to the user terminal. Received business data.

In this embodiment, the media processing device may further include:

The obtaining unit 906 is configured to obtain air interface resource information and/or transmission resource information of a cell where the user terminal is located;

The data processing unit 907 is configured to perform content adaptation and/or code stream selection on the service data according to the obtained air interface resource information and/or transmission resource information.

After the media processing device determines that the service data is saved, or the service data is obtained from the CDN, the obtaining unit 906 may obtain the air interface resource information of the cell where the user terminal is located and/or the transmission resource information of the NodeB to the RNC, that is, the cell where the user terminal is located may be obtained. The air interface resource information, or the transmission resource information of the NodeB to the RNC, or the air interface resource information of the cell where the user terminal is located and the transmission resource information of the NodeB to the RNC.

It should be noted that the obtaining unit 906 may obtain the information from the RNC, and may obtain the information from other network elements of the wireless access network, which is not limited herein.

After the obtaining unit 906 obtains the air interface resource information and/or the transmission resource information, the data processing unit 907 may perform content adaptation and/or code stream selection on the service data, that is, may perform content adaptation, or may perform code stream selection. Alternatively, content adaptation and stream selection can also be performed.

In this embodiment, the media processing device may further include:

The fourth receiving unit 902 is configured to acquire a user policy from the PCRF entity.

The data processing unit 907 may combine the user policy acquired by the previous fourth receiving unit 902 after acquiring the air interface resource information and/or the transmission resource information, or may further perform content adaptation on the service data in combination with the service information or the like. And / or code stream selection.

The media processing device in the embodiment of the present invention has been described above. The following describes the CDN. Referring to FIG. 10, a specific example of the CDN according to the embodiment of the present invention includes:

The service request receiving unit 1001 is configured to receive a service request sent by the service platform;

The information querying unit 1002 is configured to obtain information about the media processing device, where the media processing device is located in a radio access network where the user terminal is located;

The redirecting unit 1003 is configured to redirect the user terminal to the media processing device. In this embodiment, when the service data corresponding to the service request of the user terminal is cacheable content, the service platform sends a service request to the service request receiving unit 1001 of the CDN, and after the service request receiving unit 1001 receives the service request, the information query unit 1002: The information about the media processing device corresponding to the user terminal is obtained, where the media processing device is located in a radio access network where the user terminal is located.

It should be noted that the information of the media processing device may be the location information of the media processing device. In an actual application, for example, the information querying unit 1002 may query the information of the media processing device corresponding to the user terminal from the locally saved information. Alternatively, the information of the media processing device corresponding to the user terminal may be queried to the PCRF entity, or the information may be obtained from the SGSN, or the information of the media processing device may be obtained through other means, which is not limited herein. For example, if the information of the media processing device corresponding to the user terminal is queried from the PCRF entity, the PCRF may hold the binding relationship between the IP address of the user terminal reported by the RNC and the RNC, and obtain the RNC where the user terminal is located according to the binding information. And, the information about the media processing device corresponding to the user terminal is obtained according to the RNC where the user terminal is located.

After the information query unit 1002 obtains the information of the media processing device, the redirecting unit 1003 can redirect the user terminal to the media processing device according to the information. For example, the redirecting unit 1003 may send a message carrying the media processing device address information to the user terminal, and instruct the user terminal to send a service request to the media processing device after receiving the message.

After the redirecting unit 1003 redirects the user terminal to the media processing device, the media processing device can transmit the service data to the user terminal through the wireless access network.

In this embodiment, the redirecting unit 1003 redirects the user terminal whose service data is cacheable content to the media processing device, so that the media processing device sends the service data to the user terminal in the radio access network.

The above embodiments respectively describe the media processing device and the CDN. The following describes the data transmission system formed by the interaction of the network elements. Referring to FIG. 11, a specific example of the data transmission system according to the embodiment of the present invention includes:

Media processing device 1101 and CDN1102;

The CDN1102 is specifically used to:

Receiving a service request of the user terminal sent by the service platform, acquiring information of the media processing device corresponding to the user terminal, and redirecting the user terminal to the media according to the obtained information of the media processing device Processing equipment.

The media processing device 1101 is located in a radio access network where the user terminal is located, and the media processing device 1101 is specifically configured to:

Receiving a service request sent by the user terminal, determining whether the service data corresponding to the received service request is saved, and when the service data is saved, sending the service data to the user terminal;

The structure and function of the media processing device 1101 in this embodiment are the same as those of the media processing device described in the foregoing embodiment of FIG. 8 or 9, and are not described herein again.

The structure and function of the CDN 1102 in this embodiment are the same as those of the CDN described in the foregoing embodiment of FIG. 10, and details are not described herein again.

In this embodiment, the media processing device 1101 directly sends the saved service data to the user terminal through the radio access network. Since the media processing device is located in the radio access network where the user terminal is located, the service data does not need to pass through the core network. The backbone transmission network transmits, thereby saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing the transmission cost, reducing the service delay, and improving the user experience. Secondly, the content is adapted and/or adapted by the media processing device 1101. The selection of the code stream, and the media processing device 1101 obtains the information of the wireless air interface resource from the RNC belonging to the radio access network, is more timely and accurate, thereby improving resource utilization.

The specific operations of the device and the system described in the embodiment of the present invention are similar to the description of the foregoing method embodiments of the present invention, and are not described herein again.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the above mentioned storage medium can be It is a read-only memory, a disk or a disc.

The data transmission method, system and related equipment provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, the specific implementation manner and the application range may be changed. Therefore, the content of the present specification should not be construed as limiting the invention.

Claims

Rights request

A data transmission method, comprising:

The media processing device receives a service request sent by the user terminal, where the media processing device is located in a radio access network where the user terminal is located;

The media processing device determines whether the service data corresponding to the service request is saved. If the media processing device stores the service data, the media processing device sends the service data to the user terminal.

The data transmission method according to claim 1, wherein before the media processing device receives the service request sent by the user terminal, the method includes:

The media processing device receives the preset service data sent by the content distribution network CDN, and saves the preset service data.

Receiving, by the CDN, a service request of the user terminal sent by the service platform;

Obtaining, by the CDN, information about the media processing device corresponding to the user terminal;

The CDN redirects the user terminal to the media processing device.

4. The data transmission method according to claim 1, wherein:

If the media processing device does not save the service data, the media processing device sends the service request to the CDN;

Receiving, by the media processing device, service data corresponding to the service request sent by the CDN;

The media processing device sends the service data to the user terminal.

The data transmission method according to any one of claims 1 to 4, wherein before the media processing device sends the service data to the user terminal, the method includes:

Obtaining, by the media processing device, air interface resource information and/or transmission resource information of a cell where the user terminal is located;

The media processing device performs content adaptation and/or code stream selection on the service data according to the obtained air interface resource information and/or transmission resource information.

6. A data transmission method, comprising:

The content distribution network CDN receives the service request of the user terminal sent by the service platform;

Obtaining, by the CDN, information about a media processing device corresponding to the user terminal, where the media processing device is located in a radio access network where the user terminal is located;

The CDN redirects the user terminal to the media processing device.

The data transmission method according to claim 6, wherein the receiving the service request sent by the service platform comprises:

The CDN sends preset service data to the media processing device.

The data transmission method according to claim 6 or 7, wherein the acquiring, by the CDN, the information of the media processing device corresponding to the user terminal comprises:

The CDN queries the PCRF entity of the policy and charging rule function to obtain information about the media processing device corresponding to the user terminal.

The data transmission method according to claim 6 or 7, wherein the service request of the user terminal sent by the receiving service platform comprises:

Receiving, by the service platform, a service request sent by the user terminal;

The service platform determines whether the service data corresponding to the service request is cacheable content; if the content is cacheable, the service platform sends the service request to the CDN.

A media processing device, wherein the media processing device is located in a radio access network where the user terminal is located, and the media processing device includes:

a first receiving unit, configured to receive a service request sent by the user terminal;

a first determining unit, configured to determine whether the service data corresponding to the service request received by the first receiving unit is saved;

And a first sending unit, configured to send the service data to the user terminal when the first determining unit determines that the service data is saved.

The media processing device according to claim 10, wherein the media processing device further comprises:

The second receiving unit is configured to receive preset service data sent by the content distribution network CDN, and save the preset service data.

12. The media processing device according to claim 10, wherein the media processing The equipment also includes:

a second sending unit, configured to send the service request to the CDN when the first determining unit determines that the service data is not saved;

a third receiving unit, configured to receive service data corresponding to the service request sent by the CDN;

And a third sending unit, configured to send, to the user terminal, the service data received by the third receiving unit.

An acquiring unit, configured to acquire air interface resource information and/or transmission resource information of a cell where the user terminal is located;

And a data processing unit, configured to perform content adaptation and/or code stream selection on the service data according to the obtained air interface resource information and/or transmission resource information.

14. A content distribution network CDN, comprising:

a service request receiving unit, configured to receive a service request of the user terminal sent by the service platform, and an information querying unit, configured to acquire information about the media processing device corresponding to the user terminal, where the media processing device is located in the wireless device where the user terminal is located Access Network;

And a redirecting unit, configured to redirect the user terminal to the media processing device according to the information acquired by the information query unit.

15. A data transmission system, comprising:

A media processing device according to any one of claims 10 to 13, and a CDN as claimed in claim 14.