US9271134B2 - Method, device and system for data transmission - Google Patents

Method, device and system for data transmission Download PDF

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Publication number
US9271134B2
US9271134B2 US13/763,820 US201313763820A US9271134B2 US 9271134 B2 US9271134 B2 US 9271134B2 US 201313763820 A US201313763820 A US 201313763820A US 9271134 B2 US9271134 B2 US 9271134B2
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Prior art keywords
processing device
media processing
service data
resource information
user equipment
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US20130150007A1 (en
Inventor
Jingyu Wang
Junyi Wu
Yongxiang Zhao
Mingsheng Qian
Anni Wei
Hui Wang
Liebin Cai
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Assigned to HUAWEI TECHNOLOGIES CO., LTD. reassignment HUAWEI TECHNOLOGIES CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CAI, LIEBIN, WEI, ANNI, ZHAO, YONGXIANG, WU, JUNYI, WANG, HUI, QIAN, MINGSHENG, WANG, JINGYU
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Definitions

  • the present invention relates to the field of communications technologies, and in specific, to a method, a device and a system for data transmission.
  • a conventional universal mobile telecommunications system (UMTS, Universal Mobile Telecommunications System)/high speed packet access (HSPA, High Speed Packet Access) media network architecture includes: a radio access network (RAN, Radio Access Network), a backhaul (Backhaul) transmission network, a backbone (Backbone) transmission network, a packet switch (PS, Packet Switch) core network, a content distributed network (CDN, Content Distributed Network), a service platform and an Internet service provider.
  • RAN Radio Access Network
  • Backhaul backhaul
  • Backbone backbone
  • PS Packet Switch
  • CDN Content Distributed Network
  • the RAN includes a base station (NodeB) and a radio network controller (RNC, Radio Network Controller), and the PS core network includes a serving general packet radio service support node (SGSN, Serving GPRS Support Node) and a gateway general packet radio service support node (GGSN, Gateway GPRS Support Node).
  • NodeB NodeB
  • RNC Radio Network Controller
  • SGSN Serving GPRS Support Node
  • GGSN Gateway general packet radio service support node
  • the service request When a user equipment requests that a PS service should be performed, the service request reaches a service platform through the RAN, a Backbone transmission network, the PS core network and the CDN, and the service platform obtains corresponding service data from an Internet service provider (Internet SP) according to the service request, or obtains corresponding cache service data from the CDN, and sends the service data to the user equipment through the CDN, the PS core network, the Backbone transmission network and the RAN.
  • Internet SP Internet service provider
  • the user equipment in the prior art or the CDN in the prior art performs content adaptation and/or bit rate selection according to a resource condition between the user equipment and the network.
  • the resource condition between the user equipment and the network may be embodied in air interface resource information of a cell where the user equipment is located and transmission resource information, and no matter whether the user equipment or the CDN obtains the resource information, certain hysteresis exists, and the air interface resource information and the transmission resource information usually change very quickly, so that the performing, by the user equipment or the CDN, the content adaptation and/or the bit rate selection makes a result of the adaptation and the selection unable to precisely correspond to a current resource state, thus reducing the resource utilization.
  • Embodiments of the present invention provide a method, a device and a system for data transmission, which are used to increase resource utilization.
  • a method for data transmission includes: receiving, by a media processing device, a service request sent by a user equipment, where the media processing device is located at a radio access network where the user equipment is located; obtaining, by the media processing device, service data corresponding to the service request; obtaining, by the media processing device, air interface resource information of a cell where the user equipment is located and transmission resource information; and performing, by the media processing device, content adaptation and bit rate selection on the service data according to the obtained air interface resource information and transmission resource information.
  • a media processing device configured to perform, according to the air interface resource information obtained by the second obtaining unit and the transmission resource information obtained by the second obtaining unit, content adaptation and bit rate selection on the service data obtained by the first obtaining unit.
  • a system for data transmission includes: a media processing device and a PCRF entity.
  • the media processing device performs content adaptation and bit rate selection, and the media processing device is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and transmission resource information from the radio access network, thus increasing resource utilization.
  • FIG. 1 is a schematic structural diagram of a network in the prior art
  • FIG. 2 is a schematic structural diagram of a network according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an embodiment of a method for data transmission according to the present invention.
  • FIG. 4 is a schematic diagram of another embodiment of a method for data transmission according to the present invention.
  • FIG. 5 is a schematic diagram of another embodiment of a method for data transmission according to the present invention.
  • FIG. 6 is a schematic diagram of another embodiment of a method for data transmission according to the present invention.
  • FIG. 7 is a schematic diagram of another embodiment of a method for data transmission according to the present invention.
  • FIG. 8 is a schematic diagram of an embodiment of a media processing device according to the present invention.
  • FIG. 9 is a schematic diagram of another embodiment of a media processing device according to the present invention.
  • FIG. 10 is a schematic diagram of an embodiment of a PCRF entity according to the present invention.
  • FIG. 11 is a schematic diagram of an embodiment of a system for data transmission according to the present invention.
  • Embodiments of the present invention provide a method, a system and a relevant device for data transmission, which are used to increase resource utilization.
  • a network structure may include:
  • a radio access network may further include a policy and charging rules function (PCRF, Policy and Charging Rules Function) entity.
  • PCRF Policy and Charging Rules Function
  • the radio access network and the packet switch core network are connected through the backbone transmission network.
  • the packet switch core network communicates with the CDN through a Gi interface.
  • a media processing device respectively communicates with the service platform and the CDN through the Gi interface, and optionally, the media processing device may further communicate with the PCRF entity through the Gi interface.
  • the radio access network includes a base station, an RNC and the media processing device, and the base station and the RNC may be configured to complete radio access of a user; the media processing device may be configured to locally cache service data requested by a user equipment, and send the cached data to the user equipment through the radio access network, and optionally, the media processing device may be further configured to accelerate a media service, and perform content adaptation and/or bit rate selection on service data to be sent.
  • the media processing device may be located at an RNC side, may be built in the RNC, and may also be set independently of the RNC. Each RNC may correspond to a media processing device, and multiple RNCs may also correspond to a media processing device.
  • the packet switch core network includes an SGSN and a GGSN, and may be configured to complete access authentication of a PS user.
  • the service platform may be configured to complete user service access management.
  • the CDN may be configured to complete service storage and sending and redirect the user equipment to a corresponding media processing device.
  • the PCRF entity may be configured to generate a user policy, and deliver the user policy to the corresponding media processing device.
  • the network structure shown in FIG. 2 may also be applicable to subsequent embodiments of the present invention, and solutions according to all embodiment of the present invention are not only applicable to a UMTS network, but also applicable to a network of another type, such as a long term evolution network, which is not repeatedly described subsequently.
  • a method for data transmission according to an embodiment of the present invention is described in detail below; referring to FIG. 3 , a specific example of the method for data transmission according to the embodiment of the present invention includes:
  • Step 301 A media processing device receives a service request.
  • the media processing device may obtain the service request sent by the user equipment;
  • the service described in this embodiment and subsequent embodiments may be a packet service, for example, in practical applications, may be a mobile data service, a video service, or an audio service, which is not specifically limited here.
  • the media processing device is located at a radio access network where the user equipment is located.
  • Step 302 The media processing device obtains service data.
  • the media processing device may obtain service data corresponding to the service request; specific manners for obtaining the service data may be diverse, and are described in detail in a subsequent embodiment.
  • Step 303 The media processing device obtains air interface resource information and/or transmission resource information.
  • the media processing device may obtain air interface resource information of a cell where the user equipment is located and/or transmission resource information, that is, may obtain the air interface resource information of a cell where the user equipment is located, or obtain the transmission resource information, or obtain both the air interface resource information of a cell where the user equipment is located and the transmission resource information.
  • the media processing device may obtain the information from an RNC, and may also obtain the information from another network element of the radio access network such as an evolved base station, which is not specifically limited here.
  • another network element of the radio access network such as an evolved base station, which is not specifically limited here.
  • Step 304 The media processing device performs content adaptation and/or bit rate selection on the service data.
  • the media processing device After obtaining the air interface resource information and/or the transmission resource information, the media processing device performs content adaptation and/or bit rate selection on the service data, that is, may perform the content adaptation, or may perform the bit rate selection, or may perform both the content adaptation and the bit rate selection.
  • the media processing device performs content adaptation and/or bit rate selection, and the media processing device is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and/or transmission resource information from the radio access network, thus increasing resource utilization.
  • another embodiment of the method according to the present invention includes:
  • Step 401 A media processing device receives preset service data.
  • the media processing device is located at a radio access network where a user equipment is located.
  • the preset service data may be part of the most popular service data, and may also be service data requested by a specific user equipment, which is not limited here.
  • the preset service data may be stored, for example, the preset service data may be locally cached.
  • Step 402 The media processing device receives a user policy.
  • the user policy may be generated by a policy and charging rules function (PCRF) entity according to terminal information of the user equipment.
  • PCRF policy and charging rules function
  • the terminal information may include information such as a terminal type, a terminal operating system, and/or a terminal software version, and the terminal information may be sent by a service platform to the PCRF entity, and may also be obtained by the PCRF entity through querying an equipment identity register (EIR) according to international mobile equipment identity (IMEI) information of a terminal, where the IMEI information of the terminal is sent by the radio access network to the PCRF entity, which is not limited here.
  • EIR equipment identity register
  • IMEI international mobile equipment identity
  • an RNC may report the IMEI information to the PCRF entity, and it can be understood that, in practical applications, likewise, another network element of the radio access network may report the IMEI information to the PCRF entity.
  • the PCRF entity may generate a user policy, and may perform corresponding service processing for different user priority information, and different quality of service (QoS, Quality of Service) information according to the user policy.
  • QoS Quality of Service
  • the PCRF entity may further obtain subscription information of the user from a home user register, and in combination with the subscription information, generate a user policy.
  • the media processing device may be integrated in the RNC, or be integrated in an evolved base station, and in this case, the media processing device may obtain the user policy in the following manners.
  • the media processing device may receive a radio access bearer (RAB, Radio Access Bearer) allocation request sent by the PCRF, where the RAB allocation request includes an RAB parameter field, the RAB parameter field includes an allocation/retention priority (ARP, Allocation/Retention Priority), and the media processing device may use the ARP as the user policy after obtaining the ARP.
  • RAB Radio Access Bearer
  • ARP allocation/retention priority
  • the media processing device may receive an evolved radio access bearer (eRAB, evolved Radio Access Bearer) allocation request sent by the PCRF, where the eRAB allocation request includes an eRAB parameter field, the eRAB parameter field includes an ARP, and the media processing device may use the ARP as the user policy after obtaining the ARP.
  • eRAB evolved Radio Access Bearer
  • the media processing device may obtain the user policy generated by the PCRF entity from the PCRF entity.
  • the RNC or the evolved base station may obtain an ARP in the foregoing manner, and subsequently, the media processing device may obtain the ARP from the RNC or the evolved base station, and the specific obtaining manner is not limited here.
  • Step 403 The media processing device receives a service request sent by the user equipment.
  • the media processing device may obtain the service request sent by the user equipment.
  • the service in this embodiment may specifically be a packet service.
  • Step 404 The media processing device judges whether service data corresponding to the service request is stored, and if service data corresponding to the service request is stored, the process proceeds to step 407 ; if service data corresponding to the service request is not stored, the process proceeds to step 405 .
  • the media processing device After the media processing device receives the service request sent by the user equipment, the service data corresponding to the service request may be determined, and then the media processing device may judge whether the service data is stored, for example, judge whether the service data corresponding to the service request is cached locally.
  • Step 405 The media processing device sends the service request to a CDN.
  • the media processing device determines that the corresponding service data is not stored, the media processing device forwards the service request to the CDN.
  • Step 406 The media processing device receives the service data sent by the CDN and the process proceeds to step 407 .
  • the media processing device may receive the corresponding service data from the CDN.
  • the media processing device may further judge whether the service data satisfies a preset condition, if the service data satisfies a preset condition, the service data may be stored in the media processing device locally, and in practical applications, a specific preset condition, for example, may be that a service popularity degree reaches a threshold, which is not specifically limited here.
  • Step 407 The media processing device obtains air interface resource information and/or transmission resource information.
  • the media processing device may obtain air interface resource information of a cell where the user equipment is located and/or transmission resource information, that is, may obtain the air interface resource information of a cell where the user equipment is located, or obtain the transmission resource information, or obtain both the air interface resource information of a cell where the user equipment is located and the transmission resource information.
  • the media processing device may obtain the information from the RNC, and may also obtain the information from another network element of the radio access network, such as an evolved base station, which is not specifically limited here.
  • another network element of the radio access network such as an evolved base station, which is not specifically limited here.
  • Step 408 The media processing device performs content adaptation and/or bit rate selection on the service data and then sends the service data.
  • the media processing device After obtaining the air interface resource information and/or the transmission resource information, the media processing device performs content adaptation and/or bit rate selection on the service data, that is, may perform the content adaptation, or may perform the bit rate selection, or may perform both the content adaptation and the bit rate selection. After obtaining the air interface resource information and/or the transmission resource information, the media processing device may also, in combination with the previously-obtained user policy, or further in combination with service information, perform the content adaptation and/or the bit rate selection on the service data.
  • corresponding service processing may be performed according to the user policy for different user priority information, and different QoS information, so the media processing device may perform the content adaptation and/or the bit rate selection according to the air interface resource information and/or the transmission resource information, and according to the user policy.
  • a user policy of a current user is that “for a gold medal user with the highest priority, when the network environment deteriorates, it is ensured that a service transmission rate of the user is at least 2 Mbit/s, and when the network environment is good, a service transmission rate of the user may be increased to 20 Mbit/s at most”;
  • the media processing device may determine how is the current network environment; if the air interface resource information and/or the transmission resource information are higher than a first threshold, it indicates that the network environment is good, and the service transmission rate of the current user may be increased, that is, a bit rate of the network video requested by the user to be played may be increased, and may reach 20 Mbit/s at most; if the air interface resource information and/or the transmission resource information are lower than a second threshold, it indicates that the network environment deteriorates, and the service transmission rate of the current user needs to be
  • the media processing device may obtain a cache occupancy rate of a buffer of a radio link control (RLC, Radio Link Control) layer, and use the cache occupancy rate of the buffer of the RLC layer as the air interface resource information of a cell where the user equipment is located.
  • RLC Radio Link Control
  • the media processing device may judge whether the cache occupancy rate of the buffer of the RLC layer is higher than a preset first threshold (such as 70%), and if the cache occupancy rate of the buffer of the RLC layer is higher than a preset first threshold, it indicates that a current air interface transmission rate is severely less than a bit rate of the service data, and if the service data is still transmitted at a current bit rate, data in a buffer of the user equipment may be unceasingly reduced, so as to finally cause a service pause, and therefore, the media processing device may reduce the bit rate of the service data, to reduce the cache occupancy rate of the buffer of the RLC layer.
  • a preset first threshold such as 70%
  • the media processing device may further judge whether the cache occupancy rate of the buffer of the RLC layer is lower than a preset second threshold (such as 30%), and if the cache occupancy rate of the buffer of the RLC layer is lower than a preset second threshold, it indicates that the current air interface transmission rate is apparently greater than the bit rate of the service data, and in this case, the bit rate of the service data may be increased to improve user experience.
  • a preset second threshold such as 30%
  • first threshold and the second threshold in this embodiment are only an example, and in practical applications, may be modified according to a specific case, but the first threshold needs to be greater than the second threshold.
  • a specific manner of reducing the bit rate of the service data may be: selecting and sending a fragment with a relatively low bit rate of the service data; correspondingly, a specific manner of increasing the bit rate of the service data may be: selecting and sending a fragment with a relatively high bit rate of the service data.
  • the media processing device may further implement the bit rate selection in other manners, which is not specifically limited here.
  • the media processing device may further perform the content adaptation and/or the bit rate selection according to other manners, and a specific procedure is not limited here.
  • the media processing device performs content adaptation and/or bit rate selection, and the media processing device is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and/or transmission resource information from the radio access network, and further in combination with the user policy, resource allocation may be performed more precisely, thus increasing resource utilization.
  • the media processing device when the media processing device stores service data which is requested by the user equipment and locally cached, the media processing device directly sends the stored service data to the user equipment through the radio access network, and because the media processing device is located at the radio access network where the user equipment is located, the service data does not need to be transmitted through a core network and a backbone transmission network, thus saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing transmission costs, reducing a service delay, and improving the user experience.
  • FIG. 5 another specific example according to the embodiment of the present invention includes:
  • Step 501 Obtain terminal information of a user equipment.
  • a PCRF entity may obtain the terminal information of the user equipment.
  • the obtaining the terminal information of the user equipment may be implemented in diverse manners, and a specific implementation manner is described in detail in a subsequent embodiment.
  • Step 502 Generate a user policy.
  • the PCRF entity may generate a user policy, and may perform corresponding service processing for different user priority information, and different QoS information according to the user policy.
  • the PCRF entity may further obtain subscription information of the user from a home user register, and, in combination with the subscription information, generate a user policy.
  • Step 503 Send the user policy to a media processing device.
  • the PCRF entity may send the user policy to the media processing device, so that the media processing device may perform content adaptation and/or bit rate selection according to the user policy, and further in combination with air interface resource information and/or transmission resource information.
  • the media processing device is located at a radio access network where a user equipment is located.
  • the media processing device may be integrated in an RNC, or be integrated in an evolved base station, and in this case, the PCRF entity may send the user policy to the media processing device in the following manner.
  • the PCRF entity may send an RAB allocation request to the RNC where the media processing device is located, where the RAB allocation request includes an RAB parameter field, the RAB parameter field includes an ARP, and the media processing device may use the ARP as the user policy after obtaining the ARP.
  • the PCRF entity may send an eRAB allocation request to the evolved base station where the media processing device is located, where the eRAB allocation request includes an eRAB parameter field, the eRAB parameter field includes an ARP, and the media processing device may use the ARP as the user policy after obtaining the ARP.
  • the PCRF entity generates a user policy and sends the user policy to the media processing device, so that the media processing device can perform content adaptation and/or bit rate selection on the service data according to the user policy, and further in combination with air interface resource information and/or transmission resource information, so as to increase resource utilization.
  • the method for data transmission according to the embodiment of the present invention is described below with a specific example; specifically, referring to FIG. 6 , the method includes:
  • Step 601 A CDN sends preset service data to a media processing device.
  • the media processing device is located at a radio access network where a user equipment is located.
  • the preset service data may be part of the most popular service data, and may also be service data requested by a specific user equipment, which is not limited here.
  • Step 602 The user equipment initiates PDP activation, and a GGSN performs access authentication on the user equipment.
  • the user equipment initiates a PDP activation request to an SGSN/GGSN, to request a mobile data service, and the GGSN performs access authentication on the user equipment; if the access authentication passes, the user equipment is allowed to use the service, and a specific access authentication procedure is not limited here.
  • Step 603 An RNC sends a binding relation.
  • the RNC can obtain an IP address of the user equipment.
  • the RNC may send a binding relation between the IP address of the user equipment and an RNC where the user equipment is located to a PCRF entity, that is, a binding relation between the user equipment and the RNC serving the user equipment.
  • Step 604 The RNC sends IMEI information of a terminal.
  • the RNC may, after or during sending the binding relation, send the IMEI information of the user equipment to the PCRF entity.
  • Step 605 The PCRF entity obtains terminal information of the user equipment.
  • the PCRF entity may, according to the IMEI information of the user equipment, obtain the terminal information of the user equipment by querying in an EIR; for example, the terminal information may include information of a terminal type, a terminal operating system, and/or a terminal software version.
  • Step 606 The PCRF entity sends a user policy to the media processing device.
  • the PCRF entity generates the user policy according to the terminal information of the user equipment, and the meaning of the user policy is the same as that of the user policy described in the embodiment shown in FIG. 4 , which is not repeatedly described here.
  • a manner in which the media processing device obtains the user policy may be the same as step 402 described in the embodiment shown in FIG. 4 , which is not specifically repeated here.
  • Step 607 The user equipment sends a service request to a service platform.
  • the user equipment When the user equipment initiates the service request to the network side to request that a service should be performed, the user equipment sends the service request to the service platform.
  • the service in this embodiment may specifically be a packet service.
  • Step 608 The service platform judges whether service data corresponding to the service request is cacheable content.
  • the service platform may determine a service type corresponding to the service request, and thus, determine, according to the service type, whether the service data corresponding to the service request is cacheable content; for example, real-time communication data is non-cacheable content, and on-demand data is cacheable content.
  • steps 609 and 610 are executed; when it is determined that the requested service data is cacheable content, step 611 is executed.
  • Step 609 When it is determined that the requested service data is not cacheable content, the service platform sends the service request to an Internet SP.
  • the Internet SP needs to send a service directly to the user equipment, and the service platform sends the service request to the Internet SP.
  • Step 610 The Internet SP sends the service data to the user equipment.
  • the Internet SP After receiving the service request sent by the service platform, the Internet SP obtains corresponding service data according to the service request, and sends the service data to the user equipment, and the data transmission process ends.
  • Step 611 The service platform sends the service request to the CDN.
  • the service platform determines that the service data requested by the user equipment is cacheable content, the service platform sends the service request to the CDN.
  • Step 612 The CDN queries the PCRF entity to obtain location information of the media processing device corresponding to the user equipment.
  • the CDN may send a query request to the PCRF entity, to obtain the location information of the media processing device corresponding to the user equipment.
  • the PCRF may obtain, according to the binding information, the RNC where the user equipment is located, and further may obtain, according to the RNC where the user equipment is located, the information of the media processing device corresponding to the user equipment, and feed back the information to the CDN.
  • Step 613 The CDN redirects the user equipment to the media processing device.
  • the CDN may redirect the user equipment 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 equipment, to instruct the user equipment, after the message is received, to send the service request to the media processing device.
  • Step 614 The user equipment sends the service request to the media processing device.
  • step 613 because in step 613 , the CDN redirects the user equipment to the media processing device, the user equipment sends the service request to the media processing device.
  • Step 615 The media processing device judges whether the service data corresponding to the service request is stored.
  • the media processing device may judge whether the service data corresponding to the service request is stored.
  • Step 616 When the media processing device does not store the service data requested by the user equipment, the media processing device sends the service request to the CDN.
  • the media processing device may send the service request to the CDN, to request that the corresponding service data should be obtained.
  • Step 617 The CDN sends the service data to the media processing device.
  • the CDN After receiving the service request of the media processing device, the CDN sends the corresponding service data to the media processing device.
  • Step 618 The media processing device obtains air interface resource information of a cell where the user equipment is located and/or transmission resource information.
  • the media processing device may directly obtain the service data locally, and if the media processing device does not store the corresponding service data locally, the media processing device may obtain the service data from the CDN.
  • the media processing device After the media processing device obtains the service data locally, or obtains the service data from the CDN, the media processing device queries the RNC to obtain the air interface resource information of a cell where the user equipment is located and/or the transmission resource information, and the transmission resource information may be transmission resource information of the NodeB to the RNC.
  • Step 619 The media processing device performs content adaptation and/or bit rate selection on the service data according to the air interface resource information and/or the transmission resource information and according to a user policy.
  • the procedure of performing the content adaptation and/or the bit rate selection is consistent with the content described in step 408 in the embodiment shown in FIG. 4 , which is not repeatedly described here.
  • Step 620 The media processing device sends the service data to the user equipment.
  • the media processing device may send the processed service data to the user equipment.
  • the media processing device performs content adaptation and/or bit rate selection, and the media processing device is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and/or transmission resource information from the radio access network, thus increasing resource utilization.
  • the media processing device when the media processing device stores service data which is requested by the user equipment and locally cached, the media processing device directly sends the stored service data to the user equipment through the radio access network, and because the media processing device is located at the radio access network where the user equipment is located, the service data does not need to be transmitted through a core network and a backbone transmission network, thus saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing transmission costs, reducing a service delay, and improving user experience.
  • Another embodiment of the method according to the present invention includes:
  • Steps 701 to 703 are the same as steps 601 to 603 in the embodiment shown in FIG. 6 , which is not repeatedly described here.
  • Step 704 The user equipment reports terminal information to a service platform.
  • the user equipment may report the terminal information of the user equipment to the service platform; for example, the terminal information may include information of a terminal type, a terminal operating system, and/or a terminal software version.
  • Step 705 The service platform reports the terminal information to a PCRF entity.
  • the service platform may report the terminal information to the PCRF entity.
  • Steps 706 to 720 are the same as steps 606 to 620 in the embodiment shown in FIG. 6 .
  • the PCRF entity obtains the terminal information of the user equipment in different manners separately, and it can be understood that, in practical applications, the PCRF entity may further obtain the terminal information in other manners, which is not limited here.
  • the media processing device performs content adaptation and/or bit rate selection, and the media processing device is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and/or transmission resource information from the radio access network, thus increasing resource utilization.
  • the media processing device when the media processing device stores service data which is requested by the user equipment and locally cached, the media processing device directly sends the stored service data to the user equipment through the radio access network, and because the media processing device is located at the radio access network where the user equipment is located, the service data does not need to be transmitted through a core network and a backbone transmission network, thus saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing transmission costs, reducing a service delay, and improving user experience.
  • an example of the media processing device according to the embodiment of the present invention includes:
  • a receiving unit 801 configured to, in the radio access network, receive a service request sent by the user equipment;
  • a first obtaining unit 802 configured to obtain service data corresponding to the service request received by the receiving unit 801 ;
  • a second obtaining unit 803 configured to obtain air interface resource information of a cell where the user equipment is located and/or transmission resource information;
  • a data processing unit 804 configured to perform, according to the air interface resource information obtained by the second obtaining unit 803 and/or the transmission resource information obtained by the second obtaining unit 803 , content adaptation and/or bit rate selection on the service data obtained by the first obtaining unit 802 .
  • the receiving unit 801 may obtain the service request sent by the user equipment;
  • the service described in this embodiment and subsequent embodiments may specifically be a packet service, for example, in practical applications, may be a mobile data service, a video service, or an audio service, which is not specifically limited here.
  • the media processing device is located at the radio access network where the user equipment is located.
  • the first obtaining unit 802 may obtain the service data corresponding to the service request, and a specific manner of obtaining the service data is the same as the obtaining manner described in the foregoing method embodiment, which is not repeatedly described here.
  • the second obtaining unit 803 may obtain air interface resource information of a cell where the user equipment is located and/or transmission resource information, that is, may obtain the air interface resource information of a cell where the user equipment is located, or obtain the transmission resource information, or obtain both the air interface resource information of a cell where the user equipment is located and the transmission resource information.
  • the second obtaining unit 803 may obtain the information from an RNC, and may also obtain the information from another network element of the radio access network, such as an evolved base station, which is not specifically limited here.
  • the data processing unit 804 After the second obtaining unit 803 obtains the air interface resource information and/or the transmission resource information, the data processing unit 804 performs content adaptation and/or bit rate selection on the service data, that is, may perform the content adaptation, or may perform the bit rate selection, or may perform both the content adaptation and the bit rate selection.
  • the data processing unit 804 in the media processing device performs content adaptation and/or bit rate selection, and the media processing device is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and/or transmission resource information from the radio access network, thus increasing resource utilization.
  • the media processing device includes:
  • a receiving unit 801 configured to, in a radio access network, receive a service request sent by a user equipment
  • a first obtaining unit 802 configured to obtain service data corresponding to the service request received by the receiving unit 801 ;
  • a second obtaining unit 803 configured to obtain air interface resource information of a cell where the user equipment is located and/or transmission resource information;
  • a data processing unit 804 configured to perform, according to the air interface resource information obtained by the second obtaining unit 803 and/or the transmission resource information obtained by the second obtaining unit 803 , content adaptation and/or bit rate selection on the service data obtained by the first obtaining unit 802 .
  • the first obtaining unit 802 in this embodiment may specifically include:
  • a judging submodule 8021 configured to judge whether the service data is locally cached
  • a first obtaining submodule 8022 configured to, when the judging submodule 9021 judges that the service data is not locally cached, obtain the service data from a CDN;
  • a second obtaining submodule 8023 configured to, when the judging submodule 9021 judges that the service data is locally cached, obtain the service data locally.
  • the service data corresponding to the service request may be determined, and then the judging submodule 8021 may judge whether the service data is stored, for example, judge whether the service data corresponding to the service request is cached locally.
  • the first obtaining submodule 8022 forwards the service request to the CDN.
  • the first obtaining submodule 8022 may receive the corresponding service data from the CDN.
  • the second obtaining submodule 8023 may obtain the service data locally.
  • a third obtaining unit 901 configured to obtain a user policy from a PCRF entity.
  • the data processing unit 804 is configured to perform content adaptation and/or bit rate selection on the service data according to the air interface resource information and/or the transmission resource information and according to the user policy.
  • the user policy may be generated by the PCRF entity according to terminal information of the user equipment.
  • the terminal information may include information such as a terminal type, a terminal operating system, and/or a terminal software version, and the terminal information may be sent by a service platform to the PCRF entity, and may also be obtained by the PCRF entity through querying an equipment identity register (EIR) according to international mobile equipment identity (IMEI) information of a terminal, where the IMEI information of the terminal is sent by the RNC to the PCRF entity, which is not limited here.
  • EIR equipment identity register
  • IMEI international mobile equipment identity
  • the PCRF entity may generate a user policy, and may perform corresponding service processing for different user priority information, and different QoS information according to the user policy.
  • the PCRF entity may further obtain subscription information of the user from a home user register, and in combination with the subscription information, generate a user policy.
  • the third obtaining unit 901 may obtain the user policy generated by the PCRF entity from the PCRF entity.
  • the data processing unit 804 may further, in combination with the user policy obtained by the third obtaining unit 901 , or further in combination with service information, perform the content adaptation and/or the bit rate selection on the service data.
  • a manner in which the third obtaining unit 901 obtains the user policy is consistent with the obtaining manner described in step 402 of the embodiment shown in FIG. 4 , which is not repeated here.
  • corresponding service processing may be performed according to the user policy for different user priority information, and different QoS information, so the data processing unit 804 may perform the content adaptation and/or the bit rate selection according to the air interface resource information and/or the transmission resource information, and according to the user policy.
  • the data processing unit 804 in the media processing device performs content adaptation and/or bit rate selection, and the media processing device is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and/or transmission resource information from the radio access network, thus increasing resource utilization.
  • the media processing device when the media processing device stores service data which is requested by the user equipment and locally cached, the media processing device directly sends the stored service data to the user equipment through the radio access network, and because the media processing device is located at the radio access network where the user equipment is located, the service data does not need to be transmitted through a core network and a backbone transmission network, thus saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing transmission costs, reducing a service delay, and improving user experience.
  • a PCRF entity is introduced below; referring to FIG. 10 , a specific example of a PCRF entity according to an embodiment of the present invention includes:
  • an information obtaining unit 1001 configured to obtain terminal information of a user equipment
  • a generating unit 1002 configured to, according to the terminal information obtained by the information obtaining unit 1001 , generate a user policy
  • a policy sending unit 1003 configured to send the user policy generated by the generating unit 1002 to a media processing device, where the media processing device is located at a radio access network where the user equipment is located.
  • the information obtaining unit 1001 may obtain the terminal information of the user equipment.
  • the obtaining the terminal information of the user equipment may be implemented in diverse manners, and specifically, is the same as the content described in the foregoing method embodiment, which is not repeatedly described here.
  • the generating unit 1002 may generate a user policy, and may perform corresponding service processing for different user priority information, and different QoS information according to the user policy.
  • the generating unit 1002 may further obtain subscription information of the user from a home user register, and in combination with the subscription information, generate a user policy.
  • the policy sending unit 1003 may send the user policy to the media processing device, so that the media processing device may perform content adaptation and/or bit rate selection according to the user policy, and further in combination with air interface resource information and/or transmission resource information.
  • the media processing device is located at the radio access network where the user equipment is located.
  • a manner in which the policy sending unit 1003 sends the user policy is consistent with the sending manner described in step 503 of the embodiment shown in FIG. 5 , which is not repeatedly described here.
  • the information obtaining unit 1001 in this embodiment includes at least one of the following submodules:
  • a first submodule 10011 configured to receive terminal information sent by a service platform
  • a second submodule 10012 configured to receive IMEI information sent by the radio access network, and query corresponding terminal information in an EIR according to the IMEI information.
  • the RNC may report the IMEI information to the PCRF entity, and it can be understood that, in practical applications, likewise, another network element of the radio access network may report the IMEI information to the PCRF entity.
  • the generating unit 1002 generates a user policy and the policy sending unit 1003 sends the user policy to the media processing device, so that the media processing device can perform content adaptation and/or bit rate selection on the service data according to the user policy, and further in combination with air interface resource information and/or transmission resource information, so as to increase resource utilization.
  • a specific example of a system for data transmission according to an embodiment of the present invention includes:
  • a media processing device 1101 and a PCRF entity 1102 .
  • the media processing device 1101 in this embodiment is specifically configured to: in a radio access network, receive a service request sent by a user equipment; obtain service data corresponding to the service request; obtain air interface resource information of a cell where the user equipment is located and/or transmission resource information; and perform content adaptation and/or bit rate selection on the service data according to the obtained air interface resource information and/or transmission resource information.
  • the PCRF entity 1102 in this embodiment is specifically configured to: obtain terminal information of the user equipment; generate a user policy according to the obtained terminal information; and send the generated user policy to the media processing device, where the media processing device is located at a radio access network where the user equipment is located.
  • the content of the media processing device 1101 in this embodiment is the same as the content shown in FIG. 8 or FIG. 9 , which is not repeatedly described here.
  • the content of the PCRF entity 1102 in this embodiment is the same as the content shown in FIG. 10 , which is not repeatedly described here.
  • the media processing device 1101 performs content adaptation and/or bit rate selection, and the media processing device 1101 is located at the radio access network, so it is more timely and precise to obtain radio air interface resource information and/or transmission resource information from the radio access network, thus increasing resource utilization.
  • the media processing device 1101 when the media processing device 1101 stores service data which is requested by the user equipment and locally cached, the media processing device 1101 directly sends the stored service data to the user equipment through the radio access network, and because the media processing device 1101 is located at the radio access network where the user equipment is located, the service data does not need to be transmitted through a core network and a backbone transmission network, thus saving the bandwidth of the backbone transmission network and the traffic of the core network, reducing transmission costs, reducing a service delay, and improving user experience.
  • the program may be stored in a computer readable storage medium, and the foregoing storage medium may be a read only memory, a magnetic disk, or an optical disk.

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