WO2016082553A1 - 一种移动网络内容分发的方法、装置及系统 - Google Patents

一种移动网络内容分发的方法、装置及系统 Download PDF

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Publication number
WO2016082553A1
WO2016082553A1 PCT/CN2015/083402 CN2015083402W WO2016082553A1 WO 2016082553 A1 WO2016082553 A1 WO 2016082553A1 CN 2015083402 W CN2015083402 W CN 2015083402W WO 2016082553 A1 WO2016082553 A1 WO 2016082553A1
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dns
cdn
mobile network
edge server
request
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PCT/CN2015/083402
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English (en)
French (fr)
Inventor
陈淑
王国俊
程晖
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中兴通讯股份有限公司
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Publication of WO2016082553A1 publication Critical patent/WO2016082553A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for distributing content of a mobile network.
  • FIG. 1 is a schematic structural diagram of an EPS of an evolved packet system, and the entire EPS system is divided into two parts: a radio access network and a core network.
  • a Home Subscriber Server HSS
  • MME Mobility Management Entity
  • SGSN Serving GPRS Support Node
  • PCRF Policy and Charging Rule Function
  • S-GW Serving Gateway
  • PDN Gateway PDN Gateway
  • the home subscriber server HSS is a permanent storage location for the subscriber subscription data, and is located in the home network to which the subscriber subscribes.
  • the mobility management entity MME is the storage location of the user subscription data in the current network, and is responsible for the non-access stratum (Non Access Stratum, NAS) signaling management of the terminal to the network, the security verification function of the terminal, and the mobility management of the terminal. Tracking and paging management functions and bearer management in user idle mode.
  • Non-access stratum Non Access Stratum, NAS
  • the service GPRS support node SGSN is a Global System for Mobile Communications (GSM) Enhanced Data Rate for GSM Evolution (EDGE) wireless access network (GSM EDGE Radio Access Network,
  • GSM Global System for Mobile Communications
  • EDGE Enhanced Data Rate for GSM Evolution
  • GSM EDGE Radio Access Network The service support point, function and mobility of the user access core network of the UMTS Terrestrial Radio Access Network (UTRAN) for the Universal Mobile Telecommunications System (UMTS)
  • the management entity is similar and is responsible for user location update, paging management, and bearer management.
  • the service gateway S-GW is the gateway of the core network to the wireless system, and is responsible for the user plane bearer of the terminal to the core network, the data buffer in the terminal idle mode, the function of initiating the service request by the network side, the lawful interception and the packet data routing. And the forwarding function; the service gateway is responsible for counting the situation in which the user terminal uses the wireless network, and generates the CDRs of the terminal using the wireless network, and transmits the CDRs to the charging gateway.
  • the packet data gateway P-GW is a gateway of the evolved system and the external packet data network of the system. It is connected to the Internet and the packet data network, and is responsible for the Internet Protocol (IP) address allocation and charging function of the terminal. Packet filtering, and policy control.
  • IP Internet Protocol
  • the gateway GPRS support node is a gateway for the wireless access network GERAN and the terrestrial radio access network UTRAN user to access the core network, and is similar in function to the packet data gateway.
  • the policy charging rule function entity is a server in the evolution system that is responsible for providing rules for charging control, online credit control, threshold control, and quality of service (QoS) policies.
  • the 4G radio access network is composed of an evolved base station (Evolved NodeB, eNodeB for short). It is mainly responsible for transmitting and receiving wireless signals, and is connected to terminals through the air interface to manage radio resources, resource scheduling, and access control of the air interface.
  • Evolved NodeB evolved NodeB
  • eNodeB evolved NodeB
  • the 3G radio access network is composed of a base station (NodeB) and a 3G radio network controller (Radio Network Controllor, RNC for short), which is mainly responsible for transmitting and receiving wireless signals, and communicating with the terminal through the air interface to manage radio resources of the air interface. , resource scheduling, and access control.
  • NodeB NodeB
  • RNC Radio Network Controllor
  • the service GPRS support node is an upgraded SGSN, which can support the S4 interface with the service gateway, and communicates with the mobility management unit by using GPRS Tunneling Protocol version 2 (GTPv2).
  • GTPv2 GPRS Tunneling Protocol version 2
  • the Packet Switching (PS) domain network architecture is different from that of FIG. 1.
  • the SGSN and the MME are connected by using the Gn interface, and the interworking uses the GPRS Tunneling Protocol version 1 (GTPv1).
  • the SGSN cannot be connected to the serving gateway, and is connected to the gateway GPRS support node (Gateway GPRS Support Node, GGSN for short) through the Gn interface to directly access the packet data network.
  • GGSN Gateway GPRS support node
  • the Content Delivery Network caches content in different locations and directs user requests to the nearest cache server through load balancing and other technologies to obtain content and improve the response speed of users visiting the website.
  • the CDN serves the user's request in a more efficient manner through the judgment of the user's proximity and server load.
  • CDN Gateway GPRS Support Node
  • P-GW Packet Data Gateway
  • the object of the present invention is to provide a method, device and system for distributing mobile network content, deploying a CDN in a mobile network, merging a CDN with a mobile network, accelerating content of a mobile user, improving response speed, and saving bandwidth.
  • an embodiment of the present invention provides a method for distributing content of a mobile network, which is applied to a mobile network side, where the method includes: the mobile network receives an original access request of a user equipment, where the original access request is used.
  • Carrying access point information for identifying the user equipment supporting a content distribution network CDN service the mobile network sending a DNS request to the domain name system DNS according to the original access request, so that the DNS forwards the DNS request To the deep packet inspection DPI device, the DPI device pre-processes the DNS request, and sends the DNS request to the CDN global load balancing device, so that the CDN global load balancing device redirects the DNS request Distributing a CDN edge server for the DNS request; the mobile network receiving a DNS response of the DNS feedback, where the DNS response carries an IP address of a CDN edge server; wherein the DNS response is determined by the DNS Generating the IP address of the CDN edge server sent by the CDN global load balancing device to the DNS; the mobile network is based on the IP of the CDN edge server Sending an access request to the address corresponding to the CDN edge server, such that the CDN edge server requests to achieve access to the user according to the access device.
  • the DNS request carries the access point information of the user equipment, the IP address of the user equipment, and the service content type of the original access request.
  • the mobile network is connected to the CDN global load balancing device after connecting the DNS and the DPI device in sequence; the mobile network connection is directly connected to the CDN edge server.
  • the mobile network when the device on the mobile network side connected to the DNS is a serving GPRS support node, the mobile network further includes: an evolved base station, a radio network controller, a home location register, a gateway GPRS support node, and a policy charging planning function. device.
  • the mobile network when the device on the mobile network side connected to the DNS is a serving gateway, the mobile network further includes: an evolved base station, a home subscriber server, a mobility management entity, a packet data gateway, and a policy charging planning function device.
  • the embodiment of the present invention further provides a method for distributing content of a mobile network, which is applied to a CDN side, where the CDN includes a CDN global load balancing device and a CDN edge server, and the method includes: the CDN global load balancing device receives a DPI device.
  • the CDN edge server receives an access request sent by the mobile network according to the DNS response, and determines whether the session data in the access request is saved locally at the CDN edge server; if the session data in the access request is The CDN edge server is locally saved, and the CDN edge server allows the user equipment to access and provide corresponding services for the user equipment.
  • the CDN edge server sends an access request to the application server corresponding to the original access request sent by the user equipment to the mobile network, by The application server provides a corresponding service for the user equipment.
  • the CDN global load balancing device is connected to the mobile network after connecting the DPI device and the DNS in sequence; the CDN edge server is directly connected to the mobile network.
  • the device on the mobile network side connected to the DNS is a serving GPRS support node or a service gateway.
  • the embodiment of the present invention further provides an apparatus for distributing content of a mobile network, which is applied to a mobile network side, where the apparatus includes: a first receiving module, configured to receive an original access request of the user equipment, where the original access request is carried The first sending module is configured to send a DNS request to the domain name system DNS according to the original access request, so that the DNS will use the DNS to identify the access point information of the content distribution network CDN service.
  • the DPI device forwarding to the deep packet inspection DPI device, the DPI device pre-processing the DNS request, and sending the DNS request to the CDN global load balancing device, so that the CDN global load balancing device performs the DNS request Redirecting, distributing a CDN edge server for the DNS request; a second receiving module, configured to receive a DNS response of the DNS feedback, where the DNS response carries an IP address of a CDN edge server; wherein the DNS response is The DNS is generated according to an IP address sent by the CDN global load balancing device to a CDN edge server of the DNS; and a second sending module is configured to be the mobile The network sends an access request to the corresponding CDN edge server according to the IP address of the CDN edge server, so that the CDN edge server implements access of the user equipment according to the access request.
  • the DNS request carries the access point information of the user equipment, the IP address of the user equipment, and the service content type of the original access request.
  • the mobile network is connected to the CDN global load balancing device after connecting the DNS and the DPI device in sequence; the mobile network connection is directly connected to the CDN edge server.
  • the embodiment of the present invention further provides a device for distributing content of a mobile network, which is applied to a CDN side, the CDN includes a CDN global load balancing device and a CDN edge server, and the device includes: a third receiving module, configured to be the CDN globally
  • the load balancing device receives a DNS request preprocessed by the DPI device, redirects the DNS request, and distributes a CDN edge server for the DNS request, where the DNS request is requested by the mobile network according to the original access request of the user equipment.
  • the feedback module is configured to: the CDN global load balancing device feeds back the IP address of the CDN edge server to the DNS, so that the DNS is according to the CDN edge server
  • the IP address generating DNS response is sent to the mobile network
  • the response module is configured to receive, by the CDN edge server, an access request sent by the mobile network according to the DNS response, and determine whether the session data in the access request is in the
  • the CDN edge server is locally saved
  • the access module is configured to: if the session data in the access request is local to the CDN edge server
  • the CDN edge server allows the user equipment to access and provide a corresponding service for the user equipment; if the session data in the access request is not locally saved by the CDN edge server, the CDN edge server is located
  • the application server corresponding to the original access request sent by the user equipment to the mobile network sends an access request, and the application server provides a corresponding service for the user equipment.
  • the CDN global load balancing device is connected to the mobile network after connecting the DPI device and the DNS in sequence; the CDN edge server is directly connected to the mobile network.
  • the device on the mobile network side connected to the DNS is a serving GPRS support node or a service gateway.
  • the embodiment of the present invention further provides a system including a domain name system, a deep packet detecting device, a device for distributing mobile network content on the mobile network side as described above, and a device for distributing mobile network content on the content distribution network side as described above.
  • the mobile network and the content distribution network are connected by the domain name system and the deep packet parsing device, and the domain name is
  • the system and the deep packet parsing device pre-process the DNS request sent by the mobile network according to the original access request sent by the user equipment, and forward the DNS request that meets the matching condition to the CDN global load balancing function device, and then the CDN global load balancing function device.
  • the global redirection is performed to allocate a suitable CDN edge server for the DNS request, and the local scheduling and service of the access request of the user equipment is implemented by the CDN edge server, which improves the response speed of the user accessing the website and saves the bandwidth of the mobile network.
  • FIG. 1 is a schematic structural diagram of a 3GPP access system accessing an evolved packet system EPS in the related art
  • FIG. 2 is a schematic diagram showing the basic steps of a method for distributing content of a mobile network applied to a mobile network side according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a network architecture of a CDN deployed in a serving GPRS support node according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a network architecture of a CDN deployed in a service gateway according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing the basic steps of a method for distributing content of a mobile network according to an embodiment of the present invention applied to a content distribution network side;
  • FIG. 6 is a schematic diagram showing a specific execution procedure of a mobile network content distribution method applied to a mobile network side according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram showing specific steps of applying the method for distributing content of a mobile network to the content distribution network side according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of a device for distributing mobile network according to an embodiment of the present invention applied to a mobile network side;
  • FIG. 9 is a schematic structural diagram of a device for distributing mobile network according to an embodiment of the present invention applied to a content distribution network side.
  • the embodiment of the present invention provides a method, a device, and a system for distributing content of a mobile network by using a domain name in the related art that the content distribution network cannot be deployed in the mobile network except for the gateway GPRS support node and the packet data gateway.
  • the system and the deep packet parsing device connect the mobile network and the content distribution network, and the domain name system and the deep packet parsing device pre-process the DNS request sent by the mobile network according to the original access request sent by the user equipment, and the DNS request that satisfies the matching condition is satisfied.
  • CDN global load balancing function device Forwarded to the CDN global load balancing function device, and then globally redirected by the CDN global load balancing function device to allocate a suitable CDN edge server for the DNS request, and the CDN edge server implements local scheduling and service of the access request of the user equipment, improving The response speed of users accessing the website saves the bandwidth of the mobile network.
  • an embodiment of the present invention provides a method for distributing content of a mobile network, which is applied to a mobile network side, and the method includes:
  • Step 21 The mobile network receives the original access request of the user equipment, where the original access request carries the access point information used to identify the user equipment supporting the content distribution network CDN service;
  • Step 22 The mobile network sends a DNS request to the domain name system DNS according to the original access request, so that the DNS forwards the DNS request to the deep packet detection DPI device, and the DPI device preprocesses the DNS request and sends the DNS request to the CDN global load.
  • the equalization device enables the CDN global load balancing device to redirect the DNS request and distribute the CDN edge server for the DNS request;
  • Step 23 The mobile network receives a DNS response of the DNS feedback, where the DNS response carries the IP address of the CDN edge server; wherein the DNS response is generated by the DNS according to the IP address of the CDN edge server sent by the CDN global load balancing device to the DNS;
  • Step 24 The mobile network sends an access request to the corresponding CDN edge server according to the IP address of the CDN edge server, so that the CDN edge server implements access of the user equipment according to the access request.
  • the DNS request carries the access point information APN of the user equipment, the IP address of the user equipment, and the service content type of the original access request.
  • the service content type specifically refers to the video type, audio type, and the like.
  • the mobile network is connected to the CDN global load balancing device after being sequentially connected to the DNS and the DPI device;
  • the mobile network connection is directly with the CDN Edge Server.
  • the mobile network when the device on the mobile network side connected to the DNS is a serving GPRS support node, the mobile network further includes:
  • the evolved base station the radio network controller, the home location register, the gateway GPRS support node, and the policy charging planning function device.
  • the mobile network when the device on the mobile network side connected to the DNS is the serving gateway, the mobile network further includes:
  • Evolved base station home subscriber server, mobility management entity, packet data gateway, and policy charging planning function device.
  • the DNS implements DNS redirection.
  • the DNS boot mechanism refers to the global domain scheduling of the user request by the IP address of the CDN edge service node carried by the DNS response through the domain name resolution process. DPI device for accurate identification and resolution of data traffic. After the packet protocol or session type is identified, the DNS request that meets the matching condition is forwarded to the CDN Global Load Balancing Function Device (CDN GSLB) according to the specified configuration policy.
  • CDN GSLB CDN Global Load Balancing Function Device
  • the CDN GSLB is responsible for global redirection of user service requests, global load balancing of media services according to scheduling policies, and CDN edge server for realizing local scheduling and services of users (CDN GSLB and CDN edge servers form a content distribution network CDN).
  • the CDN edge server needs to implement part of the gateway GPRS support node (GGSN) while realizing its own functions.
  • GGSN gateway GPRS support node
  • S-GW Serving Gateway
  • P-GW Partial Packet Data Gateway
  • the embodiment of the present invention further provides a method for distributing content of a mobile network, which is applied to a CDN side, and the CDN includes a CDN global load balancing device and a CDN edge server, and the method includes:
  • Step 51 The CDN global load balancing device receives the DNS request preprocessed by the DPI device, redirects the DNS request, and distributes the CDN edge server for the DNS request, where the DNS request is sent by the mobile network according to the original access request of the user equipment. DNS is sent and forwarded by the DNS to the DPI device;
  • Step 52 The CDN global load balancing device feeds back the IP address of the CDN edge server to the DNS, so that the DNS generates a DNS response according to the IP address of the CDN edge server and sends the response to the mobile network.
  • Step 53 The CDN edge server receives an access request sent by the mobile network according to the DNS response, and determines whether the session data in the access request is saved locally on the CDN edge server.
  • Step 54 If the session data in the access request is saved locally on the CDN edge server, the CDN edge server allows the user equipment to access and provide the corresponding service for the user equipment; if the session data in the access request is not saved locally by the CDN edge server, Then, the CDN edge server sends an access request to the application server corresponding to the original access request sent by the user equipment to the mobile network, and the application server provides the corresponding service for the user equipment.
  • the CDN global load balancing device is connected to the mobile network after connecting the DPI device and the DNS in sequence;
  • the CDN edge server is directly connected to the mobile network; and the device on the mobile network side connected to the DNS is a serving GPRS support node or a service gateway.
  • Step 601 The user equipment (mobile 3G user) accesses the Internet normally, and the user equipment carries the access point information APN (Access Point Name);
  • APN Access Point Name
  • Step 602 The SGSN sends a DNS request to the DNS server, where the DNS request carries the user equipment APN, the IP address of the user equipment, and the service content type of the user equipment access request.
  • the APN is a subscription APN carried by the user equipment to the network side, indicating that the mobile content acceleration service (ie, supporting the CDN service) is supported; and the service content type is, for example, a video.
  • Step 603 The DNS server forwards the DNS request to the DPI device.
  • Step 604 the DPI device identifies the packet protocol, the session type, and according to the specified configuration policy, for example, the DPI identifies that the video is a video, and then forwards the DNS request that meets the matching condition to the global load balancing device (CDN GSLB);
  • CDN GSLB global load balancing device
  • Step 605 The CDN GSLB is responsible for global redirection of the user service request, performing global load balancing of the media service according to the scheduling policy, and returning the IP address of the CDN edge server to the DNS;
  • Step 606 The DNS server returns a DNS response to the SGSN, where the DNS response carries the IP address of the edge server.
  • Step 607 the SGSN selects a CDN edge server, and sends an access request to it (if the DPI recognizes that the video is a session request)
  • Step 608 The CDN edge server determines that the session data requested by the user is locally hit (stored locally), and directly provides a service to generate a charging bill; if the session data requested by the user is locally missed, the original access request to the user equipment is continued. The corresponding application server initiates a session request.
  • the network architecture supports services of mobile users within 3G, that is, 3G users, 2G users, and the like.
  • Step 701 The user equipment (mobile 4G user) accesses the Internet normally, and the user equipment carries the access point information APN (Access Point Name);
  • APN Access Point Name
  • Step 702 The S-GW sends a DNS request to the DNS server, where the DNS request carries the user equipment APN, the IP address of the user equipment, and the service content type of the user equipment access request.
  • the APN is a subscription APN carried by the user equipment to the network side, indicating that the mobile content acceleration service (ie, supporting the CDN service) is supported; and the service content type is, for example, a video.
  • Step 703 The DNS server forwards the DNS request to the DPI device.
  • Step 704 The DPI device identifies the packet protocol, the session type, and according to the specified configuration policy, for example, the DPI identifies that the video is a video, and then forwards the DNS request that meets the matching condition to the global load balancing device (CDN GSLB).
  • CDN GSLB global load balancing device
  • Step 705 The CDN GSLB is responsible for global redirection of the user service request, performing global load balancing of the media service according to the scheduling policy, and returning the IP address of the CDN edge server to the DNS;
  • Step 706 The DNS server returns a DNS response to the S-GW, where the DNS response carries the IP address of the edge server.
  • Step 707 The S-GW selects a CDN edge server, and sends an access request to the S-GW (if the DPI identifies that the video is a session request)
  • Step 708 The CDN edge server determines that the session data requested by the user is locally hit (stored locally), and directly provides a service to generate a charging bill; if the session data requested by the user is locally missed, the original access request to the user equipment is continued. The corresponding application server initiates a session request.
  • the network architecture supports the services of mobile users within 4G, that is, 4G users, 3G users, 2G users, and the like.
  • the embodiment of the present invention further provides a device for distributing content of a mobile network, which is applied to the mobile network side, and the device includes:
  • the first receiving module 81 is configured to receive an original access request of the user equipment, where the original access request carries the access point information used to identify the user equipment supporting the content distribution network CDN service;
  • the first sending module 82 is configured to send a DNS request to the domain name system DNS according to the original access request, so that the DNS forwards the DNS request to the deep packet detecting DPI device, and the DPI device pre-registers the DNS request.
  • the DNS request is sent to the CDN global load balancing device, so that the CDN global load balancing device redirects the DNS request and distributes the CDN edge server for the DNS request;
  • the second receiving module 83 is configured to receive a DNS response of the DNS feedback, where the DNS response carries the IP address of the CDN edge server; wherein the DNS response is generated by the DNS according to the IP address of the CDN edge server sent by the CDN global load balancing device to the DNS of;
  • the second sending module 84 is configured to send, by the mobile network, an access request to the corresponding CDN edge server according to the IP address of the CDN edge server, so that the CDN edge server implements access of the user equipment according to the access request.
  • the DNS request carries the access point information of the user equipment, the IP address of the user equipment, and the service content type of the original access request.
  • the mobile network is connected to the CDN global load balancing device after being connected to the DNS and the DPI device in sequence;
  • the mobile network connection is directly with the CDN Edge Server.
  • the device for distributing mobile network content provided by the embodiment of the present invention is a device for applying the method for distributing mobile network content on the mobile network side, and all embodiments of the foregoing method and the beneficial effects thereof are applicable to the device.
  • the embodiment of the present invention further provides a device for distributing content of a mobile network, which is applied to a CDN side, and the CDN includes a CDN global load balancing device and a CDN edge server, and the device includes:
  • the third receiving module 91 is configured to receive, by the CDN global load balancing device, a DNS request preprocessed by the DPI device, redirect the DNS request, and distribute the CDN edge server for the DNS request, where the DNS request is determined by the mobile network according to the user equipment.
  • the original access request is sent to the DNS and forwarded by the DNS to the DPI device;
  • the feedback module 92 is configured to: the CDN global load balancing device feeds back the IP address of the CDN edge server to the DNS, so that the DNS generates a DNS response according to the IP address of the CDN edge server and sends the response to the mobile network;
  • the response module 93 is configured to receive, by the CDN edge server, an access request sent by the mobile network according to the DNS response, and determine whether the session data in the access request is saved locally on the CDN edge server;
  • the access module 94 is configured to: if the session data in the access request is saved locally on the CDN edge server, the CDN edge server allows the user equipment to access and provide a corresponding service for the user equipment; if the session in the access request The data is not stored locally by the CDN edge server, and the CDN edge server sends an access request to the application server corresponding to the original access request sent by the user equipment to the mobile network, and the application server provides the corresponding service for the user equipment.
  • the CDN global load balancing device is connected to the mobile network after connecting the DPI device and the DNS in sequence;
  • the CDN Edge Server connects directly to the mobile network.
  • the device on the mobile network side connected to the DNS is a serving GPRS support node or a serving gateway.
  • the device for distributing mobile network content provided by the embodiment of the present invention is a device for applying the method for distributing mobile network content on the content distribution network side, and all embodiments of the foregoing method and the beneficial effects thereof are applicable to the device. .
  • the embodiment of the present invention further provides a system, including a domain name system DNS, a deep packet detecting device DPI, a mobile network content distribution device on the mobile network side, and a mobile content network side mobile device as described above.
  • a device for distributing network content including a domain name system DNS, a deep packet detecting device DPI, a mobile network content distribution device on the mobile network side, and a mobile content network side mobile device as described above.
  • the system provided by the embodiment of the present invention implements the convergence of the CDN and the mobile network by deploying the CDN in the mobile network, thereby improving the response speed of the user visiting the website and saving the bandwidth of the mobile network.
  • system provided by the embodiment of the present invention is a system including the device for distributing mobile network content on the mobile network side and the content distribution network side, and all the implementations of the device on the mobile network side and the device on the content distribution network side.
  • the examples are applicable to the system and all achieve the same or similar benefits.
  • the CDN is deployed in the mobile network to improve the response speed of the user to access the website and save the bandwidth of the mobile network.

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Abstract

本发明提供一种移动网络内容分发的方法、装置及系统，应用于移动网络侧的方法包括：移动网络接收用户设备的原接入请求；移动网络根据原接入请求，向DNS发送DNS请求，使得DNS将DNS请求转发至DPI设备，由DPI设备对DNS请求进行预处理后将DNS请求发送至CDN全局负载均衡设备，使得CDN全局负载均衡设备对DNS请求进行重定向，为DNS请求分发CDN边缘服务器；移动网络接收DNS反馈的DNS响应；移动网络根据CDN边缘服务器的IP地址向CDN边缘服务器发送接入请求，使得CDN边缘服务器根据接入请求实现用户设备的接入。本发明将CDN部署在移动网络中，提高用户访问网站的响应速度，节约移动网络的带宽。

Description

一种移动网络内容分发的方法、装置及系统 技术领域
本发明涉及通信技术领域，特别涉及一种移动网络内容分发的方法、装置及系统。
背景技术
为了保持第三代移动通信系统在通信领域的竞争力，为用户提供速率更快、时延更低以及更加个性化的移动通信服务，同时降低运营商的运营成本，第三代合作伙伴计划(3rd Generation Partnership Project，简称为3GPP)标准工作组正致力于演进分组系统(Evolved Packet System，简称EPS)的研究。如图1所示为演进分组系统EPS的结构示意图，整个EPS系统分为无线接入网和核心网两部分。在核心网中，包含了归属用户服务器(Home Subscriber Server，简称为HSS)、移动性管理实体(Mobility Management Entity，简称为MME)、服务GPRS支持节点(Serving GPRS Support Node，简称为SGSN)、策略计费规则功能(Policy and Charging Rule Function，简称为PCRF)、服务网关(Serving Gateway，简称为S-GW)和分组数据网关(PDN Gateway，简称为P-GW)。下面详细描述各部分功能：
归属用户服务器HSS，是用户签约数据的永久存放地点，位于用户签约的归属网。
移动性管理实体MME，是用户签约数据在当前网络的存放地点，负责终端到网络的非接入层(Non Access Stratum，简称为NAS)信令管理、终端的安全验证功能、终端的移动性管理、用户空闲模式下的跟踪和寻呼管理功能和承载管理。
服务GPRS支持节点SGSN，是全球移动通讯系统(Global System for Mobile Communications，简称为GSM)增强数据率GSM演进(Enhanced Data Rate for GSM Evolution，简称为EDGE)无线接入网(GSM EDGE Radio Access Network，简称为GERAN)和通用移动通信系统(Universal Mobile Telecommunications System，简称为UMTS)陆地无线接入网(UMTS Terrestrial Radio Access Network，简称为UTRAN)用户接入核心网络的业务支持点，功能上与移动性管理实体类似，负责用户的位置更新、寻呼管理和承载管理等功能。
服务网关S-GW，是核心网到无线系统的网关，负责终端到核心网的用户面承载、终端空闲模式下的数据缓存、网络侧发起业务请求的功能、合法监听和分组数据路由 和转发功能；服务网关负责统计用户终端使用无线网的情况，并产生终端使用无线网的话单，传送给计费网关。
分组数据网关P-GW，是演进系统和该系统外部分组数据网络的网关，它连接到因特网和分组数据网络上，负责终端的互联网协议(Internet Protocol，简称为IP)地址分配、计费功能、分组包过滤、以及策略控制等功能。
网关GPRS支持节点，是无线接入网GERAN和陆地无线接入网UTRAN用户接入核心网络的网关，功能上与分组数据网关类似。
策略计费规则功能实体，是演进系统中负责提供计费控制、在线信用控制、门限控制、以及服务质量(Quality of Service，简称为QoS)策略方面规则的服务器。
4G无线接入网，是由演进基站(Evolved NodeB，简称为eNodeB)组成，它主要负责无线信号的收发，通过空中接口和终端联系，管理空中接口的无线资源、资源调度、以及接入控制。
3G无线接入网，是由基站(NodeB)和3G无线网络控制器(Radio Network Controllor，简称为RNC)组成，它主要负责无线信号的收发，通过空中接口和终端联系，管理空中接口的无线资源、资源调度、以及接入控制。
上述服务GPRS支持节点是升级过的SGSN，能够支持与服务网关之间的S4接口，并与移动性管理单元之间采用GPRS隧道协议版本2(GPRS Tunneling Protocol version2，简称为GTPv2)进行互通。而对于支持3G核心网的SGSN来说分组交换(Packet Switching，简称为PS)域网络架构与图1有所不同。此时SGSN与MME采用Gn接口相连，互通采用GPRS隧道协议版本1(GPRS Tunneling Protocol version 1，简称为GTPv1)。SGSN不能与服务网关相连，通过Gn接口连接到网关GPRS支持节点(Gateway GPRS Support Node，简称为GGSN)直接进行分组数据网络访问。
在宽带领域，内容分发网络(Content Delivery Network，简称为CDN)通过在不同地点缓存内容，通过负载均衡等技术将用户请求定向到最近的缓存服务器上获取内容，提高用户访问网站的响应速度。CDN通过用户就近性和服务器负载的判断，以一种更为高效的方式为用户的请求提供服务。
为了充分利用CDN的优势，移动网络运营商希望将CDN部署在移动网络中，将CDN与移动网络融合，加速移动用户的内容，提高响应速度，节约带宽。相关技术中， CDN可以部署在网关GPRS支持节点(GGSN)或分组数据网关(P-GW)之上，天然支持。
然而，相关技术解决不了将CDN部署在移动网络其余位置的问题。
发明内容
本发明的目的在于提供一种移动网络内容分发的方法、装置及系统，将CDN部署在移动网络中，将CDN与移动网络融合，加速移动用户的内容，提高响应速度，节约带宽。
为了达到上述目的，本发明实施例提供一种移动网络内容分发的方法，应用于移动网络侧，所述方法包括：所述移动网络接收用户设备的原接入请求，所述原接入请求中携带用于标识所述用户设备支持内容分发网络CDN业务的接入点信息；所述移动网络根据所述原接入请求，向域名系统DNS发送DNS请求，使得所述DNS将所述DNS请求转发至深度包检测DPI设备，由所述DPI设备对所述DNS请求进行预处理后将所述DNS请求发送至CDN全局负载均衡设备，使得所述CDN全局负载均衡设备对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器；所述移动网络接收所述DNS反馈的DNS响应，所述DNS响应中携带CDN边缘服务器的IP地址；其中，所述DNS响应是由所述DNS根据所述CDN全局负载均衡设备发送给所述DNS的CDN边缘服务器的IP地址生成的；所述移动网络根据所述CDN边缘服务器的IP地址向对应的CDN边缘服务器发送接入请求，使得所述CDN边缘服务器根据所述接入请求实现所述用户设备的接入。
其中，所述DNS请求中携带所述用户设备的接入点信息、所述用户设备的IP地址以及所述原接入请求的服务内容类型。
其中，所述移动网络依次连接所述DNS和所述DPI设备后与所述CDN全局负载均衡设备连接；所述移动网络连接直接与所述CDN边缘服务器。
其中，当与所述DNS连接的移动网络侧的设备为服务GPRS支持节点时，所述移动网络还包括：演进基站、无线网络控制器、归属位置寄存器、网关GPRS支持节点和策略计费规划功能设备。
其中，当与所述DNS连接的移动网络侧的设备为服务网关时，所述移动网络还包括：演进基站、归属用户服务器、移动性管理实体、分组数据网关和策略计费规划功能设备。
本发明实施例还提供一种移动网络内容分发的方法，应用于CDN侧，所述CDN包括CDN全局负载均衡设备和CDN边缘服务器，所述方法包括：所述CDN全局负载均衡设备接收经过DPI设备预处理的DNS请求，对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器，其中，所述DNS请求是由移动网络根据用户设备的原接入请求向DNS发送，并由DNS转发至所述DPI设备的；所述CDN全局负载均衡设备将所述CDN边缘服务器的IP地址反馈给DNS，使得所述DNS根据所述CDN边缘服务器的IP地址生成DNS响应发送给移动网络；所述CDN边缘服务器接收移动网络根据所述DNS响应发送的接入请求，并判断所述接入请求中的会话数据是否在所述CDN边缘服务器本地保存；若所述接入请求中的会话数据在所述CDN边缘服务器本地保存，则所述CDN边缘服务器允许用户设备接入并为所述用户设备提供对应服务；若所述接入请求中的会话数据不在所述CDN边缘服务器本地保存，则所述CDN边缘服务器向所述用户设备向移动网络发送的原接入请求对应的应用服务器发送接入请求，由所述应用服务器为所述用户设备提供对应服务。
其中，所述CDN全局负载均衡设备依次连接所述DPI设备和所述DNS后与所述移动网络连接；所述CDN边缘服务器直接与所述移动网络连接。
其中，与所述DNS连接的移动网络侧的设备为服务GPRS支持节点或服务网关。
本发明实施例还提供一种移动网络内容分发的装置，应用于移动网络侧，所述装置包括：第一接收模块，设置为接收用户设备的原接入请求，所述原接入请求中携带用于标识所述用户设备支持内容分发网络CDN业务的接入点信息；第一发送模块，设置为根据所述原接入请求，向域名系统DNS发送DNS请求，使得所述DNS将所述DNS请求转发至深度包检测DPI设备，由所述DPI设备对所述DNS请求进行预处理后将所述DNS请求发送至CDN全局负载均衡设备，使得所述CDN全局负载均衡设备对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器；第二接收模块，设置为接收所述DNS反馈的DNS响应，所述DNS响应中携带CDN边缘服务器的IP地址；其中，所述DNS响应是由所述DNS根据所述CDN全局负载均衡设备发送给所述DNS的CDN边缘服务器的IP地址生成的；第二发送模块，设置为所述移动网络根据所述CDN边缘服务器的IP地址向对应的CDN边缘服务器发送接入请求，使得所述CDN边缘服务器根据所述接入请求实现所述用户设备的接入。
其中，所述DNS请求中携带所述用户设备的接入点信息、所述用户设备的IP地址以及所述原接入请求的服务内容类型。
其中，所述移动网络依次连接所述DNS和所述DPI设备后与所述CDN全局负载均衡设备连接；所述移动网络连接直接与所述CDN边缘服务器。
本发明实施例还提供一种移动网络内容分发的装置，应用于CDN侧，所述CDN包括CDN全局负载均衡设备和CDN边缘服务器，所述装置包括：第三接收模块，设置为所述CDN全局负载均衡设备接收经过DPI设备预处理的DNS请求，对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器，其中，所述DNS请求是由移动网络根据用户设备的原接入请求向DNS发送，并由DNS转发至所述DPI设备的；反馈模块，设置为所述CDN全局负载均衡设备将所述CDN边缘服务器的IP地址反馈给DNS，使得所述DNS根据所述CDN边缘服务器的IP地址生成DNS响应发送给移动网络；响应模块，设置为所述CDN边缘服务器接收移动网络根据所述DNS响应发送的接入请求，并判断所述接入请求中的会话数据是否在所述CDN边缘服务器本地保存；接入模块，设置为若所述接入请求中的会话数据在所述CDN边缘服务器本地保存，则所述CDN边缘服务器允许用户设备接入并为所述用户设备提供对应服务；若所述接入请求中的会话数据不在所述CDN边缘服务器本地保存，则所述CDN边缘服务器向所述用户设备向移动网络发送的原接入请求对应的应用服务器发送接入请求，由所述应用服务器为所述用户设备提供对应服务。
其中，所述CDN全局负载均衡设备依次连接所述DPI设备和所述DNS后与所述移动网络连接；所述CDN边缘服务器直接与所述移动网络连接。
其中，与所述DNS连接的移动网络侧的设备为服务GPRS支持节点或服务网关。
本发明实施例还提供一种系统，包括域名系统、深度包检测设备、如上所述的移动网络侧的移动网络内容分发的装置以及如上所述的内容分发网络侧的移动网络内容分发的装置。
本发明实施例的上述技术方案至少具有如下有益效果：本发明实施例的移动网络内容分发的方法、装置及系统中，通过域名系统和深度包解析设备将移动网络和内容分发网络连接，由域名系统和深度包解析设备对移动网络根据用户设备发送的原接入请求发送的DNS请求进行预处理，将满足匹配条件的DNS请求转发至CDN全局负载均衡功能设备，再由CDN全局负载均衡功能设备进行全局重定向，为DNS请求分配合适的CDN边缘服务器，由CDN边缘服务器实现用户设备的接入请求的本地调度和服务，提高了用户访问网站的响应速度，节约了移动网络的带宽。
附图说明
图1表示相关技术中3GPP接入系统接入演进分组系统EPS的结构示意图；
图2表示本发明实施例的移动网络内容分发的方法应用于移动网络侧的基本步骤示意图；
图3表示本发明实施例的CDN部署在服务GPRS支持节点之后的网络架构示意图；
图4表示本发明实施例的CDN部署在服务网关之后的网络架构示意图；
图5表示本发明实施例的移动网络内容分发的方法应用于内容分发网络侧的基本步骤示意图；
图6表示本发明实施例的移动网络内容分发的方法应用于移动网络侧的具体执行步骤示意图；
图7表示本发明实施例的移动网络内容分发的方法应用于内容分发网络侧的具体执行步骤示意图；
图8表示本发明实施例的移动网络分发的装置应用于移动网络侧的结构示意图；
图9表示本发明实施例的移动网络分发的装置应用于内容分发网络侧的结构示意图。
具体实施方式
为使本发明实施例要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
本发明实施例针对相关技术中内容分发网络不能部署在移动网络中除网关GPRS支持节点和分组数据网关之外的其余位置的问题，提供一种移动网络内容分发的方法、装置及系统，通过域名系统和深度包解析设备将移动网络和内容分发网络连接，由域名系统和深度包解析设备对移动网络根据用户设备发送的原接入请求发送的DNS请求进行预处理，将满足匹配条件的DNS请求转发至CDN全局负载均衡功能设备，再由CDN全局负载均衡功能设备进行全局重定向，为DNS请求分配合适的CDN边缘服务器，由CDN边缘服务器实现用户设备的接入请求的本地调度和服务，提高了用户访问网站的响应速度，节约了移动网络的带宽。
如图2所示，本发明实施例提供一种移动网络内容分发的方法，应用于移动网络侧，方法包括：
步骤21，移动网络接收用户设备的原接入请求，原接入请求中携带用于标识用户设备支持内容分发网络CDN业务的接入点信息；
步骤22，移动网络根据原接入请求，向域名系统DNS发送DNS请求，使得DNS将DNS请求转发至深度包检测DPI设备，由DPI设备对DNS请求进行预处理后将DNS请求发送至CDN全局负载均衡设备，使得CDN全局负载均衡设备对DNS请求进行重定向，为DNS请求分发CDN边缘服务器；
步骤23，移动网络接收DNS反馈的DNS响应，DNS响应中携带CDN边缘服务器的IP地址；其中，DNS响应是由DNS根据CDN全局负载均衡设备发送给DNS的CDN边缘服务器的IP地址生成的；
步骤24，移动网络根据CDN边缘服务器的IP地址向对应的CDN边缘服务器发送接入请求，使得CDN边缘服务器根据接入请求实现用户设备的接入。
本发明的上述实施例中，DNS请求中携带用户设备的接入点信息APN、用户设备的IP地址以及原接入请求的服务内容类型。服务内容类型具体指视频类型、音频类型等。
可选地，如图3、图4所示，本发明上述实施例中，移动网络依次连接DNS和DPI设备后与CDN全局负载均衡设备连接；
移动网络连接直接与CDN边缘服务器。
本发明具体实施例中，当与DNS连接的移动网络侧的设备为服务GPRS支持节点时，移动网络还包括：
演进基站、无线网络控制器、归属位置寄存器、网关GPRS支持节点和策略计费规划功能设备。
可选地，本发明具体实施例中，当与DNS连接的移动网络侧的设备为服务网关时，移动网络还包括：
演进基站、归属用户服务器、移动性管理实体、分组数据网关和策略计费规划功能设备。
本发明的上述实施例的具体应用中，DNS实现DNS重定向，DNS引导机制是指通过域名解析流程，由DNS响应(DNS Response)中携带CDN边缘服务节点的IP地址，实现用户请求的全局调度；DPI设备，实现对数据流量的精确识别与解析。在识别出报文协议或会话类型后，支持按照指定的配置策略将满足匹配条件的DNS请求转发至CDN全局负载均衡功能设备(CDN GSLB)。
其中，CDN GSLB负责对用户服务请求的全局重定向，根据调度策略进行媒体服务的全局负载均衡；CDN边缘服务器，实现用户的本地调度和服务(CDN GSLB和CDN边缘服务器组成内容分发网络CDN)。
需要说明的是，为了更好的实现CDN与移动网络的融合，当CDN部署在服务GPRS支持节点之后时，CDN边缘服务器在实现其本身的功能的同时还需实现部分网关GPRS支持节点(GGSN)的功能；当CDN部署在服务网关(S-GW)之后时，CDN边缘服务器在实现其本身的功能的同时还需实现部分分组数据网关(P-GW)的功能。
为了更好的实现上述目的，如图5所示，本发明实施例还提供一种移动网络内容分发的方法，应用于CDN侧，CDN包括CDN全局负载均衡设备和CDN边缘服务器，方法包括：
步骤51，CDN全局负载均衡设备接收经过DPI设备预处理的DNS请求，对DNS请求进行重定向，为DNS请求分发CDN边缘服务器，其中，DNS请求是由移动网络根据用户设备的原接入请求向DNS发送，并由DNS转发至DPI设备的；
步骤52，CDN全局负载均衡设备将CDN边缘服务器的IP地址反馈给DNS，使得DNS根据CDN边缘服务器的IP地址生成DNS响应发送给移动网络；
步骤53，CDN边缘服务器接收移动网络根据DNS响应发送的接入请求，并判断接入请求中的会话数据是否在CDN边缘服务器本地保存；
步骤54，若接入请求中的会话数据在CDN边缘服务器本地保存，则CDN边缘服务器允许用户设备接入并为用户设备提供对应服务；若接入请求中的会话数据不在CDN边缘服务器本地保存，则CDN边缘服务器向用户设备向移动网络发送的原接入请求对应的应用服务器发送接入请求，由应用服务器为用户设备提供对应服务。
承续上例，可选地，本发明上述实施例中，CDN全局负载均衡设备依次连接DPI设备和DNS后与移动网络连接；
CDN边缘服务器直接与移动网络连接；且与DNS连接的移动网络侧的设备为服务GPRS支持节点或服务网关。
下面结合图3对将CDN部署在SGSN(服务GPRS支持节点)之后的网络构架下，移动网络内容分发的方法的具体步骤如图6所示：
步骤601，用户设备(移动3G用户)正常上网，用户设备带上接入点信息APN(Access Point Name)；
步骤602，SGSN向DNS服务器发送DNS请求，该DNS请求中携带用户设备APN，用户设备的IP地址，用户设备接入请求的服务内容类型等参数；
可选地，该APN是用户设备携带到网络侧的签约APN，表示支持这种移动内容加速业务(即支持CDN业务)；服务内容类型，例如是视频等。
步骤603，DNS服务器将DNS请求转发至DPI设备；
步骤604，DPI设备识别报文协议，会话类型，按照指定的配置策略，比如DPI识别出是视频，则将满足匹配条件的DNS请求转发至全局负载均衡设备(CDN GSLB)；
步骤605，CDN GSLB负责对用户服务请求的全局重定向，根据调度策略进行媒体服务的全局负载均衡，向DNS返回CDN边缘服务器的IP地址；
步骤606，DNS服务器向SGSN返回DNS响应，该DNS响应中携带边缘服务器的IP地址；
步骤607，SGSN选择CDN边缘服务器，向其发送接入请求(如果为DPI识别出是视频，则为会话请求)；
步骤608，CDN边缘服务器，判断用户请求的会话数据本地命中(在本地保存)，则直接提供服务，产生计费话单；若用户请求的会话数据本地未命中，继续向用户设备原接入请求对应的应用服务器发起会话请求。
需要说明的是，对于CDN部署在SGSN之后的情况，该网络架构支持3G以内的移动用户的业务，即3G用户、2G用户等。
下面结合图4对将CDN部署在S-GW(服务节点)之后的网络架构下，移动网络内容分发的方法的具体步骤如图7所示：
步骤701，用户设备(移动4G用户)正常上网，用户设备带上接入点信息APN(Access Point Name)；
步骤702，S-GW向DNS服务器发送DNS请求，该DNS请求中携带用户设备APN，用户设备的IP地址，用户设备接入请求的服务内容类型等参数；
可选地，该APN是用户设备携带到网络侧的签约APN，表示支持这种移动内容加速业务(即支持CDN业务)；服务内容类型，例如是视频等。
步骤703，DNS服务器将DNS请求转发至DPI设备；
步骤704，DPI设备识别报文协议，会话类型，按照指定的配置策略，比如DPI识别出是视频，则将满足匹配条件的DNS请求转发至全局负载均衡设备(CDN GSLB)；
步骤705，CDN GSLB负责对用户服务请求的全局重定向，根据调度策略进行媒体服务的全局负载均衡，向DNS返回CDN边缘服务器的IP地址；
步骤706，DNS服务器向S-GW返回DNS响应，该DNS响应中携带边缘服务器的IP地址；
步骤707，S-GW选择CDN边缘服务器，向其发送接入请求(如果为DPI识别出是视频，则为会话请求)；
步骤708，CDN边缘服务器，判断用户请求的会话数据本地命中(在本地保存)，则直接提供服务，产生计费话单；若用户请求的会话数据本地未命中，继续向用户设备原接入请求对应的应用服务器发起会话请求。
需要说明的是，对于CDN部署在S-GW之后的情况，该网络架构支持4G以内的移动用户的业务，即4G用户、3G用户、2G用户等。
为了更好的实现上述目的，如图8所示，本发明实施例还提供一种移动网络内容分发的装置，应用于移动网络侧，装置包括：
第一接收模块81，设置为接收用户设备的原接入请求，原接入请求中携带用于标识用户设备支持内容分发网络CDN业务的接入点信息；
第一发送模块82，设置为根据原接入请求，向域名系统DNS发送DNS请求，使得DNS将DNS请求转发至深度包检测DPI设备，由DPI设备对DNS请求进行预处 理后将DNS请求发送至CDN全局负载均衡设备，使得CDN全局负载均衡设备对DNS请求进行重定向，为DNS请求分发CDN边缘服务器；
第二接收模块83，设置为接收DNS反馈的DNS响应，DNS响应中携带CDN边缘服务器的IP地址；其中，DNS响应是由DNS根据CDN全局负载均衡设备发送给DNS的CDN边缘服务器的IP地址生成的；
第二发送模块84，设置为移动网络根据CDN边缘服务器的IP地址向对应的CDN边缘服务器发送接入请求，使得CDN边缘服务器根据接入请求实现用户设备的接入。
可选地，本发明上述实施例中，DNS请求中携带用户设备的接入点信息、用户设备的IP地址以及原接入请求的服务内容类型。
可选地，本发明上述实施例中，移动网络依次连接DNS和DPI设备后与CDN全局负载均衡设备连接；
移动网络连接直接与CDN边缘服务器。
需要说明的是，本发明实施例提供的移动网络内容分发的装置是应用上述移动网络侧的移动网络内容分发的方法的装置，则上述方法的所有实施例及其有益效果均适用于该装置。
为了更好的实现上述目的，如图9所示，本发明实施例还提供一种移动网络内容分发的装置，应用于CDN侧，CDN包括CDN全局负载均衡设备和CDN边缘服务器，装置包括：
第三接收模块91，设置为CDN全局负载均衡设备接收经过DPI设备预处理的DNS请求，对DNS请求进行重定向，为DNS请求分发CDN边缘服务器，其中，DNS请求是由移动网络根据用户设备的原接入请求向DNS发送，并由DNS转发至DPI设备的；
反馈模块92，设置为CDN全局负载均衡设备将CDN边缘服务器的IP地址反馈给DNS，使得DNS根据CDN边缘服务器的IP地址生成DNS响应发送给移动网络；
响应模块93，设置为CDN边缘服务器接收移动网络根据DNS响应发送的接入请求，并判断接入请求中的会话数据是否在CDN边缘服务器本地保存；
接入模块94，设置为若接入请求中的会话数据在CDN边缘服务器本地保存，则CDN边缘服务器允许用户设备接入并为用户设备提供对应服务；若接入请求中的会话 数据不在CDN边缘服务器本地保存，则CDN边缘服务器向用户设备向移动网络发送的原接入请求对应的应用服务器发送接入请求，由应用服务器为用户设备提供对应服务。
可选地，本发明上述实施例中，CDN全局负载均衡设备依次连接DPI设备和DNS后与移动网络连接；
CDN边缘服务器直接与移动网络连接。
可选地，本发明上述实施例中，与DNS连接的移动网络侧的设备为服务GPRS支持节点或服务网关。
需要说明的是，本发明实施例提供的移动网络内容分发的装置是应用上述内容分发网络侧的移动网络内容分发的方法的装置，则上述方法的所有实施例及其有益效果均适用于该装置。
为了更好的实现上述目的，本发明实施例还提供一种系统，包括域名系统DNS、深度包检测设备DPI、如上的移动网络侧的移动网络内容分发的装置以及如上的内容分发网络侧的移动网络内容分发的装置。
本发明实施例提供的系统，通过将CDN部署在移动网络中，实现CDN与移动网络的融合，提高用户访问网站的响应速度，节约移动网络的带宽。
需要说明的是，本发明实施例提供的系统是包含上述移动网络侧和内容分发网络侧的移动网络内容分发的装置的系统，则上述移动网络侧的装置和内容分发网络侧的装置的所有实施例均适用于该系统，且均能达到相同或相似的有益效果。
以上是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
工业实用性
如上所述，通过上述实施例及优选实施方式，将CDN部署在移动网络中，提高用户访问网站的响应速度，节约移动网络的带宽。

Claims (15)

  1. 一种移动网络内容分发的方法，应用于移动网络侧，所述方法包括：
    所述移动网络接收用户设备的原接入请求，所述原接入请求中携带用于标识所述用户设备支持内容分发网络CDN业务的接入点信息；
    所述移动网络根据所述原接入请求，向域名系统DNS发送DNS请求，使得所述DNS将所述DNS请求转发至深度包检测DPI设备，由所述DPI设备对所述DNS请求进行预处理后将所述DNS请求发送至CDN全局负载均衡设备，使得所述CDN全局负载均衡设备对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器；
    所述移动网络接收所述DNS反馈的DNS响应，所述DNS响应中携带CDN边缘服务器的IP地址；其中，所述DNS响应是由所述DNS根据所述CDN全局负载均衡设备发送给所述DNS的CDN边缘服务器的IP地址生成的；
    所述移动网络根据所述CDN边缘服务器的IP地址向对应的CDN边缘服务器发送接入请求，使得所述CDN边缘服务器根据所述接入请求实现所述用户设备的接入。
  2. 根据权利要求1所述的方法，其中，所述DNS请求中携带所述用户设备的接入点信息、所述用户设备的IP地址以及所述原接入请求的服务内容类型。
  3. 根据权利要求1所述的方法，其中，所述移动网络依次连接所述DNS和所述DPI设备后与所述CDN全局负载均衡设备连接；
    所述移动网络连接直接与所述CDN边缘服务器。
  4. 根据权利要求3所述的方法，其中，当与所述DNS连接的移动网络侧的设备为服务GPRS支持节点时，所述移动网络还包括：
    演进基站、无线网络控制器、归属位置寄存器、网关GPRS支持节点和策略计费规划功能设备。
  5. 根据权利要求3所述的方法，其中，当与所述DNS连接的移动网络侧的设备为服务网关时，所述移动网络还包括：
    演进基站、归属用户服务器、移动性管理实体、分组数据网关和策略计费规划功能设备。
  6. 一种移动网络内容分发的方法，应用于CDN侧，所述CDN包括CDN全局负载均衡设备和CDN边缘服务器，所述方法包括：
    所述CDN全局负载均衡设备接收经过DPI设备预处理的DNS请求，对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器，其中，所述DNS请求是由移动网络根据用户设备的原接入请求向DNS发送，并由DNS转发至所述DPI设备的；
    所述CDN全局负载均衡设备将所述CDN边缘服务器的IP地址反馈给DNS，使得所述DNS根据所述CDN边缘服务器的IP地址生成DNS响应发送给移动网络；
    所述CDN边缘服务器接收移动网络根据所述DNS响应发送的接入请求，并判断所述接入请求中的会话数据是否在所述CDN边缘服务器本地保存；
    若所述接入请求中的会话数据在所述CDN边缘服务器本地保存，则所述CDN边缘服务器允许用户设备接入并为所述用户设备提供对应服务；若所述接入请求中的会话数据不在所述CDN边缘服务器本地保存，则所述CDN边缘服务器向所述用户设备向移动网络发送的原接入请求对应的应用服务器发送接入请求，由所述应用服务器为所述用户设备提供对应服务。
  7. 根据权利要求6所述的方法，其中，所述CDN全局负载均衡设备依次连接所述DPI设备和所述DNS后与所述移动网络连接；
    所述CDN边缘服务器直接与所述移动网络连接。
  8. 根据权利要求7所述的方法，其中，与所述DNS连接的移动网络侧的设备为服务GPRS支持节点或服务网关。
  9. 一种移动网络内容分发的装置，应用于移动网络侧，所述装置包括：
    第一接收模块，设置为接收用户设备的原接入请求，所述原接入请求中携带用于标识所述用户设备支持内容分发网络CDN业务的接入点信息；
    第一发送模块，设置为根据所述原接入请求，向域名系统DNS发送DNS请求，使得所述DNS将所述DNS请求转发至深度包检测DPI设备，由所述DPI设备对所述DNS请求进行预处理后将所述DNS请求发送至CDN全局负载均衡设备，使得所述CDN全局负载均衡设备对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器；
    第二接收模块，设置为接收所述DNS反馈的DNS响应，所述DNS响应中携带CDN边缘服务器的IP地址；其中，所述DNS响应是由所述DNS根据所述CDN全局负载均衡设备发送给所述DNS的CDN边缘服务器的IP地址生成的；
    第二发送模块，设置为所述移动网络根据所述CDN边缘服务器的IP地址向对应的CDN边缘服务器发送接入请求，使得所述CDN边缘服务器根据所述接入请求实现所述用户设备的接入。
  10. 根据权利要求9所述的装置，其中，所述DNS请求中携带所述用户设备的接入点信息、所述用户设备的IP地址以及所述原接入请求的服务内容类型。
  11. 根据权利要求9所述的装置，其中，所述移动网络依次连接所述DNS和所述DPI设备后与所述CDN全局负载均衡设备连接；
    所述移动网络连接直接与所述CDN边缘服务器。
  12. 一种移动网络内容分发的装置，应用于CDN侧，所述CDN包括CDN全局负载均衡设备和CDN边缘服务器，所述装置包括：
    第三接收模块，设置为所述CDN全局负载均衡设备接收经过DPI设备预处理的DNS请求，对所述DNS请求进行重定向，为所述DNS请求分发CDN边缘服务器，其中，所述DNS请求是由移动网络根据用户设备的原接入请求向DNS发送，并由DNS转发至所述DPI设备的；
    反馈模块，设置为所述CDN全局负载均衡设备将所述CDN边缘服务器的IP地址反馈给DNS，使得所述DNS根据所述CDN边缘服务器的IP地址生成DNS响应发送给移动网络；
    响应模块，设置为所述CDN边缘服务器接收移动网络根据所述DNS响应发送的接入请求，并判断所述接入请求中的会话数据是否在所述CDN边缘服务器本地保存；
    接入模块，设置为若所述接入请求中的会话数据在所述CDN边缘服务器本地保存，则所述CDN边缘服务器允许用户设备接入并为所述用户设备提供对应服务；若所述接入请求中的会话数据不在所述CDN边缘服务器本地保存，则所述CDN边缘服务器向所述用户设备向移动网络发送的原接入请求对应的应用服务器发送接入请求，由所述应用服务器为所述用户设备提供对应服务。
  13. 根据权利要求12所述的装置，其中，所述CDN全局负载均衡设备依次连接所述DPI设备和所述DNS后与所述移动网络连接；
    所述CDN边缘服务器直接与所述移动网络连接。
  14. 根据权利要求13所述的装置，其中，与所述DNS连接的移动网络侧的设备为服务GPRS支持节点或服务网关。
  15. 一种系统，包括域名系统、深度包检测设备、如权利要求9至11任一项所述的移动网络侧的移动网络内容分发的装置以及如权利要求12至14任一项所述的内容分发网络侧的移动网络内容分发的装置。
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