WO2016165524A1 - 内容访问方法、无线接入网内容分发网络基站和核心内容分发网络装置 - Google Patents

内容访问方法、无线接入网内容分发网络基站和核心内容分发网络装置 Download PDF

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Publication number
WO2016165524A1
WO2016165524A1 PCT/CN2016/076773 CN2016076773W WO2016165524A1 WO 2016165524 A1 WO2016165524 A1 WO 2016165524A1 CN 2016076773 W CN2016076773 W CN 2016076773W WO 2016165524 A1 WO2016165524 A1 WO 2016165524A1
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Prior art keywords
content distribution
distribution network
base station
radio access
user equipment
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PCT/CN2016/076773
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English (en)
French (fr)
Inventor
宋涛
陈文军
周力
刘志伟
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华为技术有限公司
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Publication of WO2016165524A1 publication Critical patent/WO2016165524A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor

Definitions

  • the present invention relates to communication technologies, and more particularly to a content access method, a radio access network content distribution network base station, and a core content distribution network device.
  • the rapid development of network transmission technology makes the content available through the Internet more and more abundant; for example, users can read news, listen to music, watch movies, and download application software through the Internet.
  • the Web Cache technology can be adopted. s solution.
  • FIG. 1 is a structural diagram of a content access system.
  • UMTS represents a Universal Mobile Telecommunications System
  • LTE represents Long Term Evolution (LTE).
  • LTE Long Term Evolution
  • GGSN Gateway GPRS Support Node
  • PGW Packet Data Network Gateway
  • the basic principle is that the content copy of the application server 2 can be cached in the cache core server 1a and the cache edge server 13, and the cache core server 1a determines that the content copy is already on the cache edge service. After the buffer 13 is buffered, a flag is added in the TCP Option field to notify the cache tag server 15 to perform a TCP payload replacement.
  • the cache tag server 15 uses the TCP payload of the cached content to use several bytes. Instead of the token server, the cache edge server 13 finds the cached original content copy at the cache edge server 13 based on the tag server information to restore the replaced TCP payload and then transmits it to the user device 21.
  • the existing content access technology can reduce the burden of the application server and save the transmission bandwidth between the wireless access network and the core network
  • the cache edge server 13 needs to wait for the TCP message of the cache core server 1a to be restored and then sent.
  • the existing content access technology needs to deploy three types of nodes, such as the cache core server 1a, the cache mark server 5, and the cache edge server 13, at a cost. Higher.
  • a first embodiment of the present invention provides a content access method for a base station of a content distribution network of a first radio access network, comprising: receiving, by using a transmission control protocol with a user equipment, a super device from the user equipment. a text transfer protocol request; determining, based on the hypertext transfer protocol request, whether the wireless access network content distribution network base station stores content corresponding to the hypertext transfer protocol request; and based on the first wireless access
  • the network content distribution network base station stores content corresponding to the hypertext transfer protocol request, and the content is transmitted to the user equipment through the transmission control protocol connection.
  • the content access method further includes: sending an outband message to the core content distribution network device through an outband channel to notify the core content distribution network device, And transmitting, by the first radio access network content distribution network base station, the content to the user equipment by using the transmission control protocol connection.
  • the content access method includes: transmitting, according to the first radio access network content distribution network base station, content corresponding to the hypertext transfer protocol request, and sending a session migration request to the core content distribution network device by using the outband channel Receiving, by the out-of-band channel, a session migration response from the core content distribution network device in response to the sending of the session migration request; and stopping the connection and the transmission control of the user equipment based on the session migration response Protocol connection.
  • the content access method further comprises: receiving, after the transmitting the content, a session migration from the core content distribution network device through the out-of-band channel Requesting to stop the connection with the transmission control protocol of the user equipment based on the session migration request; and transmitting a session migration response to the core content distribution network device through the outband channel in response to the session migration request
  • the core content distribution network device forwards the session migration response to another radio access network content distribution network base station, and the another radio access network content distribution network base station responds to the user equipment according to the session migration response Establishing the transport control protocol connection.
  • the step of transmitting the content to the user equipment further comprises: transmitting, by the transmission control protocol connection, the first part of the content to the Transmitting the user equipment; and transmitting, according to the signal range of the user equipment to the second radio access network content distribution network base station, the second part of the content to the second radio access network content distribution network base station, so that The second radio access network content distribution network base station transmits a second portion of the content to the user equipment.
  • the content access method further includes: after transmitting the second part of the content to the user equipment, by using the An outer channel receives a session migration request from the core content distribution network device; stopping connection to the transmission control protocol connection with the user equipment based on the session migration request; and transmitting a session migration response to the outband channel
  • the core content distribution network device wherein the core content distribution network device forwards the session migration response to the second radio access network content distribution network base station, and the second radio access network content distribution network base station according to the The session migration response establishes the transmission control protocol connection with the user equipment.
  • a second embodiment of the present invention provides a content access method for a core content distribution network device, including: receiving a session migration request from a radio access network content distribution network base station through an outband channel, where The session migration request is sent because the radio access network content distribution network base station does not store the content requested by the user equipment; based on the session migration request, establish a connection with the transmission control protocol of the user equipment; After the transmission control protocol is connected, the session migration response is sent to the radio access network content distribution network base station by the outband channel, so that the radio access network content distribution network base station stops the connection based on the session migration response. Connecting to the transmission control protocol of the user equipment; and transmitting, by the transmission control protocol connection, the content requested by the user equipment to the user equipment.
  • a third embodiment of the present invention provides a content access method for a core content distribution network device, comprising: receiving, by a transmission control protocol connection, an acknowledgement message from a second radio access network content distribution network base station The confirmation message is used to confirm that the user equipment has received all the requested content; based on the confirmation message, determining that the user equipment has been moved by the first radio access network content distribution network base station to the second wireless connection The network content distribution network base station; based on the determining, sending a session migration request to the first radio access network content distribution network base station by using the outband channel; receiving, by the outband channel, according to the sending of the session migration request a session transition response from the base station of the first radio access network content distribution network; and forwarding the session transition response to the second radio access network content distribution network base station by the outband channel to enable the a radio access network content distribution network base station establishes a transmission with the user equipment based on the session migration response System protocol connection.
  • a fourth embodiment of the present invention provides a first radio access network content distribution network base station, including: a communicator, configured to receive, by using a transmission control protocol with a user equipment, from the user equipment. a hypertext transfer protocol request; and a processor, configured to determine, based on the hypertext transfer protocol request, whether the wireless access network content distribution network base station stores content corresponding to the hypertext transfer protocol request; The communicator is further configured to store, according to the first radio access network content distribution network base station, content corresponding to the hypertext transfer protocol request, and send the content to the User equipment.
  • the communicator is further configured to: send an outband message to the core content distribution network device through the outband channel to notify the core content distribution network device And transmitting, by the first radio access network content distribution network base station, the content to the user equipment by using the transmission control protocol connection.
  • the communicator is further configured to: based on the radio access network content distribution network, the base station does not store a request corresponding to the hypertext transfer protocol request Contenting, sending, by the out-of-band channel, a session migration request to the core content distribution network device; receiving, according to the sending of the session migration request, a session migration response from the core content distribution network device through the out-of-band channel; And stopping the connection to the transmission control protocol of the user equipment based on the session migration response.
  • the communicator is further configured to: receive, after the transmitting the content, a session migration from the core content distribution network device by using the outband channel Requesting to stop the connection with the transmission control protocol of the user equipment based on the session migration request; and transmitting a session migration response to the core content distribution network device through the outband channel in response to the session migration request
  • the core content distribution network device forwards the session migration response to another radio access network content distribution network base station, and the another radio access network content distribution network base station responds to the user equipment according to the session migration response Establishing the transport control protocol connection.
  • the communicator is further configured to: transmit, by the transmission control protocol connection, the first part of the content to the user equipment; Transmitting, by the user equipment, a signal range of the second radio access network content distribution network base station, and transmitting the second part of the content to the second radio access network content distribution network base station, so that the second radio access network A content distribution network base station transmits a second portion of the content to the user equipment.
  • the communicator is further configured to: after transmitting the second part of the content to the user equipment, pass the An outer channel receives a session migration request from the core content distribution network device; a session migration request, stopping the connection with the transmission control protocol of the user equipment; and transmitting a session migration response to the core content distribution network device by the out-of-band channel, wherein the core content distribution network device forwards The session migration response is to the second radio access network content distribution network base station, and the second radio access network content distribution network base station establishes the transmission control protocol connection with the user equipment according to the session migration response.
  • a fifth embodiment of the present invention provides a core content distribution network apparatus, including: a communicator, configured to receive a session migration request from a radio access network content distribution network base station by using an outband channel, where The session migration request is sent because the radio access network content distribution network base station does not store the content requested by the user equipment; and the processor is configured to establish a transmission control protocol with the user equipment based on the session migration request.
  • the processor is further configured to: after establishing the transmission control protocol connection, send a session migration response to the radio access network content distribution network base station by using the outband channel, so that the wireless access
  • the network content distribution network base station stops the connection with the transmission control protocol of the user equipment based on the session migration response
  • the processor is further configured to send the content requested by the user equipment by using the transmission control protocol connection To the user device.
  • a fifth embodiment of the present invention provides a core content distribution network apparatus, including: a communicator, configured to receive, by using a transmission control protocol connection, an acknowledgement message from a base station of a second radio access network content distribution network, The confirmation message is used to confirm that the user equipment has received all the requested content; and the processor is configured to determine, according to the confirmation message, that the user equipment has distributed the signal range of the network base station by the first radio access network content.
  • the communicator is further configured to: move to a signal range based on the user equipment that has been distributed by the first radio access network content to the network base station Transmitting, by the outband channel, a session transition request to the user equipment; and receiving, by the outband channel, the signal range from the second radio access network content distribution network base station a session transition response of a base station of a wireless access network content distribution network; and forwarding through the outband channel Session transfer in response to the second radio access network content distribution network base station, such that the second radio access network content distribution network in response to the base station based on the mobility and session establishment The transmission control protocol connection of the user equipment.
  • the radio access network content distribution network base station of the embodiment can directly process the request (for example, an HTTP request) sent by the user equipment, such as the content requested by the user equipment in the radio access network content distribution network base station. It can be found, and can be directly sent to the user equipment by the wireless access network content distribution network base station, without sending the request sent by the user equipment to the core content distribution network device 27, according to which the cache mark server device can be no longer deployed. In order to achieve increased download speed and save the cost of building a cache tag server.
  • the request for example, an HTTP request
  • the user equipment such as the content requested by the user equipment in the radio access network content distribution network base station. It can be found, and can be directly sent to the user equipment by the wireless access network content distribution network base station, without sending the request sent by the user equipment to the core content distribution network device 27, according to which the cache mark server device can be no longer deployed.
  • the cache mark server device can be no longer deployed.
  • FIG. 1 is a structural diagram of a content access system
  • FIG. 2 is a structural diagram of a content access system according to a first embodiment of the present invention.
  • FIG. 3 is a structural diagram of a base station of a content distribution network of a radio access network according to a first embodiment of the present invention
  • FIG. 4 is a structural diagram of a core content distribution network device according to a first embodiment of the present invention.
  • 5 to 8 are signal flow diagrams of a content access system according to a first embodiment of the present invention.
  • FIG. 9 is a schematic diagram showing the hardware structure of a base station of a content distribution network of a radio access network according to an embodiment of the invention.
  • Table 1 is a table of definitions of abbreviations and key terms related to subsequent embodiments, please refer to it.
  • the content access system includes a user equipment 21, a radio access network content distribution network base station 23 (which can be regarded as a cache edge server), Serving gateway/PDN gateway 25 and core content distribution network device 27 (which can be considered a cache core server).
  • a radio access network content distribution network base station 23 which can be regarded as a cache edge server
  • Serving gateway/PDN gateway 25 and core content distribution network device 27 (which can be considered a cache core server).
  • the user equipment 21 can issue a content request (e.g., request a video) to the radio access network content distribution network base station 23, and the radio access network content distribution network base station 23 will check if there is content stored by the user equipment 21, if wireless access
  • the network content distribution network base station 23 stores the content requested by the user equipment 21, and then can be sent to the storage user equipment 21, and the communication between the radio access network content distribution network base station 23 and the user equipment 21 can be achieved through a TCP connection, but not The application of this embodiment is limited.
  • the radio access network content distribution network base station 23 does not store the content requested by the user equipment 21, the session with the user equipment 21 is migrated to the core through the outband channel (shown by a broken line in FIG. 2).
  • the content distribution network device 27 causes the core content distribution network device 27 to transmit the content requested by the user device 21 to the user device 21 through the radio access network content distribution network base station 23 and the serving gateway/PDN gateway 25. The details will be described below with reference to FIGS. 3 to 8.
  • FIG. 3 is a structural diagram of a radio access network content distribution network base station 23.
  • the radio access network content distribution network base station 23 includes a communicator 231, a processor 233, a memory 235, a power source 237, and
  • the processor 233 is coupled to the communicator 231, the memory 235, and the access interface 239.
  • the power supply 317 is used to supply power to the communicator 231, the processor 233, and the incoming interface 239.
  • the memory 235 can be stored and provided to the user equipment 21.
  • the access interface 239 is at least connectable to the keyboard 239a and the display 239b, and the communicator 231 is used between the wireless access network content distribution network base station 23 and other devices/devices or communication networks. Communication.
  • FIG. 4 is a structural diagram of the core content distribution network device 27 .
  • the core content distribution network device 27 includes a communicator 271 , a processor 273 , and a memory 275 .
  • the processor 273 is coupled to the communicator 271 and Memory 275, communicator 271 is used for communication between core content distribution network device 27 and other devices/devices or communication networks, and memory 275 can store content, operating systems, and other applications provided to user device 21.
  • the role of the user equipment 21, the radio access network content distribution network base station 23, and the core content distribution network device 27 in the content access system will be described below.
  • the user equipment 21 sends a TCP synchronization connection request to the radio access network content distribution network base station 23 to establish a TCP connection between the user equipment 21 and the radio access network content distribution network base station 23; in step 302, the wireless connection After receiving the TCP synchronization connection request, the communicator 231 of the access network content distribution network base station 23 sends a TCP synchronization connection response to the user equipment 21; in step 303, the user equipment 21 sends a TCP response to the wireless connection in response to the TCP synchronization connection response.
  • the networked content distribution network base station 23 after completing the three-way handshake process through steps 301 to 303, the TCP connection between the user equipment 21 and the radio access network content distribution network base station 23 can be established.
  • the user equipment 21 sends a Hypertext Transfer Protocol (HTTP) request to the radio access network content distribution network base station 23 via the TCP connection to request content from the radio access network content distribution network base station 23 (eg, Request a video).
  • HTTP Hypertext Transfer Protocol
  • the user equipment 21 considers that the HTTP request is to be sent to the core content distribution network device 27 in order to increase the efficiency of the content access system; in step 305, the wireless access network content distribution
  • the processor 233 of the radio access network content distribution network base station 23 determines whether the memory 235 of the radio access network content distribution network base station 23 is stored based on the HTTP request. There is content corresponding to the HTTP request.
  • the memory 235 of the radio access network content distribution network base station 23 stores the content corresponding to the HTTP request.
  • the communicator 231 of the radio access network content distribution network base station 23 transmits the out-of-band message to the out-of-band channel.
  • the core content distribution network device 27 notifies the core content distribution network device 27 that the first radio access network content distribution network base station 23 transmits the content to the user equipment 21 via the TCP connection; in step 307, the communication of the core content distribution network device 27
  • the 271 receives the out-of-band message through the out-of-band channel and records the information carried in the out-of-band message in the memory 275.
  • the out-of-band message sent to the core content distribution network device 27 may include quintuple information of the IP stream and the radio access network content distribution network base station 23 number information, and the core content distribution network device 27 may The tuple information and the radio access network content distribution network base station 23 number information are recorded in the memory 275, whereby the core content distribution network device 27 can know that the radio access network content distribution network base station 23 is currently connected via TCP and The user equipment 21 communicates, that is, between the radio access network content distribution network base station 23 and the user equipment 21, a session is performed through the TCP connection.
  • the memory 235 of the radio access network content distribution network base station 23 stores content corresponding to the hypertext transfer protocol request, and in step 308, the communicator 231 of the radio access network content distribution network base station 23 transmits an HTTP request over the TCP connection.
  • the communicator 271 of the radio access network content distribution network base station 23 is connected by TCP, for transmission
  • the content requested by the user device 21 is sent to the user device 21.
  • step 306 needs to be implemented earlier than step 307, and step 308 needs to be implemented earlier than step 309, but there is no time relationship between step 306 and step 307 and step 308 and step 309, for example, the time relationship of the implementation.
  • steps 306 and step 307 and step 308 and step 309 may be: (step 308, step 306, step 307, and step 309) and (step 308, step 309, step 306, and step 307) and the like.
  • the memory 235 of the radio access network content distribution network base station 23 does not store content corresponding to the HTTP request.
  • FIG. 6 a signaling flowchart of the content access system according to the first embodiment of the present invention is illustrated. Applicable to the content access system of Figure 2.
  • the communicator 231 of the radio access network content distribution network base station 23 transmits a session migration request to the core content distribution network device 27 through the outband channel, and the session migration request carries TCP connection information (TCP-Socket-information), HTTP.
  • TCP connection information TCP-Socket-information
  • the TCP connection information may include, but is not limited to, the contents of Table 2, and the local end in Table 2 refers to the radio access network content distribution network base station 23.
  • the communicator 271 of the core content distribution network device 27 passes the out-of-band channel.
  • the processor 273 of the core content distribution network device 27 establishes a TCP connection with the user equipment via the communicator 271 based on the session migration request.
  • the session migration request contains TCP connection information, so the core content distribution network device 27 can establish a TCP connection with the user device 21 based on the various information contained in Table 2.
  • step 312 after establishing the TCP connection, the processor 273 sends a session transition response to the radio access network content distribution network base station 23 through the communicator 271 and through the outband channel; in step 313, the radio access network content distribution network
  • the communicator 231 of the base station 23 receives the session migration response from the core content distribution network device 27 through the out-of-band channel, and stops the TCP connection with the user device 21 based on the session migration response.
  • step 314 because the session migration request carries the HTTP request, the processor 273 of the core content distribution network device 27 determines that the memory 275 of the content distribution network device 27 stores the content corresponding to the HTTP request based on the HTTP request, and is based on the memory. 275 stores content corresponding to the HTTP request, and sends an HTTP request response to the user device 21 through the communicator 271; in step 315, the processor 273 transmits the user device 21 through the communicator 271 and through a TCP connection with the user device 21. The requested content is to the user device 21.
  • the radio access network content distribution network base station 23 stores the content requested by the user equipment 21, but the user equipment 21 is distributed by the radio access network content distribution network base station 23 (the first radio access network content distribution network base station).
  • the signal range is moved to the context of the signal range of the radio access network content distribution network base station 29 (the second radio access network content distribution network base station).
  • FIG. 7 illustrates a signaling flowchart of a content access system according to a first embodiment of the present invention, which is applicable to the content access system of FIG.
  • the communicator 271 of the radio access network content distribution network base station 23 transmits the content requested by the user equipment 21 to the user equipment 21 through a TCP connection; after receiving the content, in step 401, the user The device 21 sends an acknowledgment message over the TCP connection, wherein the acknowledgment message is used to indicate that the user device 21 has received all of the requested content.
  • the radio access network content distribution network base station 29 receives the transmission via the TCP connection.
  • the confirmation message is added to the acknowledgment message by the number information of the radio access network content distribution network base station 29 in the manner of the TCP header extension field, and the acknowledgment message including the number information of the radio access network content distribution network base station 29 is transmitted to the core content distribution.
  • Network device 27
  • the communicator 271 of the core content distribution network device 27 receives the acknowledgment message from the radio access network content distribution network base station 29 via the TCP connection, and the processor 273 selects the radio access network content according to the acknowledgment message.
  • the number information of the network base station 29 is distributed, and it is confirmed that the user equipment 21 is moved by the radio access network content distribution network base station 23 to the radio access network content distribution network base station 29, and the session migration request is transmitted to the radio access network content distribution through the outband channel.
  • Network base station 23 the communicator 271 of the core content distribution network device 27 receives the acknowledgment message from the radio access network content distribution network base station 29 via the TCP connection, and the processor 273 selects the radio access network content according to the acknowledgment message.
  • the number information of the network base station 29 is distributed, and it is confirmed that the user equipment 21 is moved by the radio access network content distribution network base station 23 to the radio access network content distribution network base station 29, and the session migration request is transmitted to the radio access network content distribution through the outband channel.
  • the out-of-band message recorded by the core content distribution network device 27 in step 307 includes the number information of the radio access network content distribution network base station 23, whereby the processor 273 can store the radio access according to the memory 275.
  • the number information of the network content distribution network base station 23 and the number information of the radio access network content distribution network base station 29 included in the confirmation message confirm that the user equipment 21 is moved from the signal range of the radio access network content distribution network base station 23 to the radio access.
  • the network content distributes the signal range of the network base station 29 and transmits a session migration request to the radio access network content distribution network base station 23 via the out-of-band channel.
  • step 404 the communicator 231 of the radio access network content distribution network base station 23 receives the session migration request from the core content distribution network device 27 through the outband channel, and the communicator 231 stops the connection with the user equipment 21 based on the session migration request.
  • step 405 the communicator 231 of the radio access network content distribution network base station 23 transmits a session transition response to the core content distribution network device 27 through the outband channel in response to the session migration request.
  • the session migration response here includes but is not limited to the information in Table 2.
  • the communicator 271 of the core content distribution network device 27 receives the session migration response from the radio access network content distribution network base station 23 through the outband channel in response to the transmission of the session migration request, and forwards the session migration through the outband channel.
  • the radio access network content distribution network base station 29 receives the session migration response and establishes a TCP connection with the user equipment 21 according to the session migration response;
  • the radio access network content distribution network base station 29 Based on the reception of the session migration response and the establishment of the TCP connection, the response message is sent to the core content distribution network device 27 through the outband channel; in step 409, the radio access network content distribution network base station 29 sends the HTTP response to the user equipment over the TCP connection. 21. After that, the HTTP request sent by the user equipment 21 will be processed by the radio access network content distribution network base station 29.
  • the radio access network content distribution network base station 23 stores the content requested by the user equipment 21, but the user equipment 21 distributes the network base station 23 by the radio access network content after not completely receiving the requested content.
  • the signal range of the first radio access network content distribution network base station is moved to the context of the signal range of the radio access network content distribution network base station 29 (the second radio access network content distribution network base station).
  • FIG. 8 is a signaling flowchart of a content access system according to a first embodiment of the present invention, which is applicable to the content access system of FIG.
  • step 309 will be replaced by step 309a, step 309b, and step 309c.
  • step 309a the communicator 231 of the radio access network content distribution network base station 23 transmits the first part of the content to the user equipment 21 through the TCP connection; in step 309b, the user equipment 21 moves to the radio access network content distribution.
  • the signal range of the network base station 29, the communicator 231 of the radio access network content distribution network base station 23 sends the second part of the content to the radio access network content distribution network base station 29, in step 309c, in response to the user equipment 21 moving to the wireless connection
  • the incoming content distributes the signal range of the network base station 29, and the wireless access network content distribution network base station 29 transmits the second portion of the content to the user device 21 so that the user device 21 can completely receive all of the content.
  • each of the radio access network content distribution network base stations can communicate with each other.
  • the radio access network content distribution network base station 23 also Knowing that the user equipment 11 has moved to the radio access network content distribution network base station 29, the second part of the content can be sent to the radio access network content distribution network base station 29 through the backend network, and then distributed by the radio access network content.
  • the network base station 29 transmits the second portion of the content to the user equipment 21.
  • the radio access network content distribution network base station of the embodiment can directly process the request (for example, an HTTP request) sent by the user equipment, such as the content requested by the user equipment in the radio access network content distribution network base station. It can be found, and can be directly sent to the user equipment by the wireless access network content distribution network base station, without sending the request sent by the user equipment to the core content distribution network device 27, according to which the cache mark server device can be no longer deployed. In order to achieve increased download speed and save the cost of building a cache tag server.
  • the request for example, an HTTP request
  • the user equipment such as the content requested by the user equipment in the radio access network content distribution network base station. It can be found, and can be directly sent to the user equipment by the wireless access network content distribution network base station, without sending the request sent by the user equipment to the core content distribution network device 27, according to which the cache mark server device can be no longer deployed.
  • the cache mark server device can be no longer deployed.
  • FIG. 9 is a schematic diagram showing the hardware structure of a base station 5 of a content distribution network of a radio access network according to an embodiment of the invention.
  • the radio access network content distribution network base station 5 includes a processor 51, a memory 52, an input/output interface 53, a communication interface 54, and a bus 55.
  • the processor 51, the memory 52, the input/output interface 53 and the communication interface 54 realize a communication connection with each other via the bus 55.
  • the processor 51 can be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for executing related programs.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the memory 52 may be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM).
  • Memory 52 can store operating systems and other applications.
  • the program code for implementing the technical solution provided by the embodiment of the present invention is stored in the memory 52 and executed by the processor 51 when the technical solution provided by the embodiment of the present invention is implemented by software or firmware.
  • the input/output interface 53 is for receiving input data and information, and outputting data such as an operation result.
  • the communication interface 54 implements communication between the radio access network content distribution network base station 5 and other devices or communication networks using transceivers such as, but not limited to, a communicator and a communication module.
  • Bus 55 may include a path for communicating information between various components of radio access network content distribution network base station 5, such as processor 51, memory 52, input/output interface 53, and communication interface 54.
  • radio access network content distribution network base station 5 shown in FIG. 9 is only shown The processor 51, the memory 52, the input/output interface 53, the communication interface 54, and the bus 55, but in a specific implementation process, those skilled in the art should understand that the radio access network content distribution network base station 5 also includes a normal operation. Other devices that are required. At the same time, those skilled in the art will appreciate that the radio access network content distribution network base station 5 may also include hardware devices that implement other additional functions, depending on the particular needs. Moreover, those skilled in the art will appreciate that the radio access network content distribution network base station 5 may also only include the devices or modules necessary to implement the embodiments of the present invention, and does not necessarily include all of the devices shown in FIG.
  • FIG. 9 The hardware structure shown in FIG. 9 and the above description are applicable to various core content distribution network devices and user equipments provided by embodiments of the present invention.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例提供了一种内容访问方法、无线接入网内容分发网络基站和核心内容分发网络装置，所述内容访问方法包括：通过與用户设备的传输控制协议连接，接收来自所述用户设备的超文本传输协议请求；基于所述超文本传输协议请求，判断所述无线接入网内容分发网络基站是否存储有与所述超文本传输协议请求相对应的内容；以及基于所述第一无线接入网内容分发网络基站存储有与所述超文本传输协议请求相对应的内容，通过所述传输控制协议连接，发送所述内容至所述用户设备。如此一来，本发明实施例无须再将用户设备所发的请求送至核心内容分发网络装置，据此，缓存标记服务器设备将可不再被布建，以达成提升下载速度以及节省布建缓存标记服务器的成本。

Description

内容访问方法、无线接入网内容分发网络基站和核心内容分发网络装置
本申请要求于2015年4月16日提交中国专利局、申请号为201510181175.1，发明名称为“内容访问方法、无线接入网内容分发网络基站和核心内容分发网络装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通讯技术，尤其涉及内容访问方法、无线接入网内容分发网络基站和核心内容分发网络装置。
背景技术
网络传输技术的飞速发展，使得可以通过互联网提供的内容越来越丰富；例如，用户可以通过互联网读新闻，听音乐，看电影，下载应用软件。为能更有效率的提供用户网络上的的内容并降低应用服务器的负担以及节省无线接入网到核心网之间传输(Backhual)带宽，网络缓存(Web Cache)技术便是一种可被采用的解决方案。
详言之，请参阅图1，其绘示内容访问系统的结构图，为便于理解，此内容访问系统已经过简化，UMTS表示通用移动通讯系统(Universal Mobile Telecommunications System)，LTE表示长期演进(LTE,Long Term Evolution)系统。通过在无线接入网(RAN)部署缓存边缘(Cache Edge)节点(即缓存边缘服务器13)；在核心网(PS Core)部署缓存标记(Cache Token)服务器15，在网关GPRS支撑结点(GGSN,Gateway GPRS Support Node)17或PDN网关(PGW,Packet Data Network Gateway)19出口处部署缓存核心节点(即缓存核心服务器1a)。
基本原理是，应用服务器2的内容副本可缓存在缓存核心服务器1a以及缓存边缘服务器13，缓存核心服务器1a确定内容副本已在缓存边缘服务 器13缓存后，便在传输控制协议选项(TCP Option)字段里增加标记，通知缓存标记服务器15进行TCP载荷(payload)替换，缓存标记服务器15将命中缓存内容的TCP载荷使用几个字节的标记服务器(token)代替，在缓存边缘服务器13根据标记服务器信息在缓存边缘服务器13找到缓存的原始内容副本，以还原出被替换的TCP载荷，然后再发送到用户设备21。
惟，目前现有的内容访问技术虽可降低应用服务器的负担以及节省无线接入网到核心网之间传输带宽，但缓存边缘服务器13需要等待缓存核心服务器1a的TCP报文进行还原后再发送给用户设备21，因此用户设备21下载速度上没有进一步的提高；再者，现有的内容访问技术需部署缓存核心服务器1a、缓存标记服务器5和缓存边缘服务器13等三种类型的节点，成本较高。
发明内容
本发明的目的在于提供一种较少布建成本以及下载速度更快的内容访问系统。
为达上述目的，本发明第一实施例提供了用于第一无线接入网内容分发网络基站的内容访问方法，包括：通过與用户设备的传输控制协议连接，接收来自所述用户设备的超文本传输协议请求；基于所述超文本传输协议请求，判断所述无线接入网内容分发网络基站是否存储有与所述超文本传输协议请求相对应的内容；以及基于所述第一无线接入网内容分发网络基站存储有与所述超文本传输协议请求相对应的内容，通过所述传输控制协议连接，发送所述内容至所述用户设备。
结合第一实施例，在另种可能的第一实现方式中，所述内容访问方法进一步包含:通过带外通道发送带外消息至核心内容分发网络装置，以通知所述核心内容分发网络装置，所述第一无线接入网内容分发网络基站通过所述传输控制协议连接发送所述内容至所述用户设备。
结合第一实施例，在另种可能的第二实现方式中，所述内容访问方法进 一步包含:基于所述第一无线接入网内容分发网络基站未存储有与所述超文本传输协议请求相对应的内容，通过所述带外通道发送会话迁移请求至所述核心内容分发网络装置；因应所述会话迁移请求的发送，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移响应；以及基于所述会话迁移响应，停止接续与所述用户设备的所述传输控制协议连接。
结合第一实施例，在另种可能的第三实现方式中，所述内容访问方法进一步包含:于传送所述内容后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；基于所述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及因应所述会话迁移请求，通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至另一无线接入网内容分发网络基站，所述另一无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
结合第一实施例，在另种可能的第四实现方式中，所述发送所述内容至所述用户设备的步骤进一步包括:通过所述传输控制协议连接，传送所述内容的第一部分至所述用户设备；以及因应所述用户设备移动至第二无线接入网内容分发网络基站的讯号范围，传送所述内容的第二部分至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站传送所述内容的第二部分至所述用户设备。
结合第一实施例以及第四实现方式，在另种可能的第五实现方式中，所述内容访问方法进一步包含:于传送所述内容的第二部分至所述用户设备后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；基于所述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，所述第二无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
为达上述目的，本发明第二实施例提供了一种用于核心内容分发网络装置的内容访问方法，包括：通过带外通道接收来自无线接入网内容分发网络基站的会话迁移请求，其中所述会话迁移请求是因所述无线接入网内容分发网络基站未存储用户设备所请求的内容而被发送；基于所述会话迁移请求，建立与所述用户设备的传输控制协议连接；于建立所述传输控制协议连接后，通过所述带外通道发送会话迁移响应至所述无线接入网内容分发网络基站，以使所述无线接入网内容分发网络基站基于所述会话迁移响应，停止接续与用户设备的所述传输控制协议连接；以及通过所述传输控制协议连接，发送所述用户设备所请求的内容至用户设备。
为达上述目的，本发明第三实施例提供了一种用于核心内容分发网络装置的内容访问方法，包括：通过传输控制协议连接，接收来自第二无线接入网内容分发网络基站的确认消息，其中所述确认消息用于确认用户设备已接收所请求的全部内容；基于所述确认消息，判断所述用户设备已由第一无线接入网内容分发网络基站移动至所述第二无线接入网内容分发网络基站；基于所述判断，通过所述带外通道发送会话迁移请求至第一无线接入网内容分发网络基站；因应所述会话迁移请求的发送，通过所述带外通道接收来自所述第一无线接入网内容分发网络基站的会话迁移响应；以及通过所述带外通道转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站基于所述会话迁移响应建立与所述用户设备的传输控制协议连接。
为达上述目的，本发明第四实施例提供了一种第一无线接入网内容分发网络基站，包括：通讯器，用于透过与用户设备的传输控制协议连接，接收来自所述用户设备的超文本传输协议请求；以及处理器，用于基于所述超文本传输协议请求，判断所述无线接入网内容分发网络基站是否存储有与所述超文本传输协议请求相对应的内容；其中，所述通讯器进一步用于基于所述第一无线接入网内容分发网络基站存储有与所述超文本传输协议请求相对应的内容，通过所述传输控制协议连接，发送所述内容至所述用户设备。
结合第四实施例，在另种可能的第一实现方式中，所所述通讯器进一步用于：通过带外通道发送带外消息至核心内容分发网络装置，以通知所述核心内容分发网络装置，所述第一无线接入网内容分发网络基站通过所述传输控制协议连接发送所述内容至所述用户设备。
结合第四实施例，在另种可能的第二实现方式中，所述通讯器进一步用于：基于所述无线接入网内容分发网络基站未存储有与所述超文本传输协议请求相对应的内容，通过所述带外通道发送会话迁移请求至所述核心内容分发网络装置；因应所述会话迁移请求的发送，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移响应；以及基于所述会话迁移响应，停止接续与所述用户设备的所述传输控制协议连接。
结合第四实施例，在另种可能的第三实现方式中，所述通讯器进一步用于：于传送所述内容后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；基于所述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及因应所述会话迁移请求，通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至另一无线接入网内容分发网络基站，所述另一无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
结合第四实施例，在另种可能的第四实现方式中，所述通讯器进一步用于：通过所述传输控制协议连接，传送所述内容的第一部分至所述用户设备；以及因应所述用户设备移动至第二无线接入网内容分发网络基站的讯号范围，传送所述内容的第二部分至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站传送所述内容的第二部分至所述用户设备。
结合第五实施例以及第四实现方式，在另种可能的第五实现方式中，所述通讯器进一步用于：于传送所述内容的第二部分至所述用户设备后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；基于所 述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，所述第二无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
为达上述目的，本发明第五实施例提供了一种核心内容分发网络装置，包括：通讯器，用于通过带外通道接收来自无线接入网内容分发网络基站的会话迁移请求，其中所述会话迁移请求是因所述无线接入网内容分发网络基站未存储用户设备所请求的内容而被发送；以及处理器，用于基于所述会话迁移请求，建立与所述用户设备的传输控制协议连接；其中，所述处理器进一步用于于建立所述传输控制协议连接后，通过所述带外通道发送会话迁移响应至所述无线接入网内容分发网络基站，以使所述无线接入网内容分发网络基站基于所述会话迁移响应，停止接续与用户设备的所述传输控制协议连接，以及所述处理器进一步用于通过所述传输控制协议连接，发送所述用户设备所请求的内容至用户设备。
为达上述目的，本发明第五实施例提供了一种核心内容分发网络装置，包括：通讯器，用于通过传输控制协议连接，接收来自第二无线接入网内容分发网络基站的确认消息，其中所述确认消息用于确认用户设备已接收所请求的全部内容；以及处理器，用于基于所述确认消息，判断所述用户设备已由第一无线接入网内容分发网络基站的信号范围移动至所述第二无线接入网内容分发网络基站的信号范围；其中，所述通讯器进一步用于：基于所述用户设备已由第一无线接入网内容分发网络基站的信号范围移动至所述第二无线接入网内容分发网络基站的信号范围，通过带外通道发送会话迁移请求至所述用户设备；因应所述会话迁移请求的发送，通过所述带外通道接收来自所述第一无线接入网内容分发网络基站的会话迁移响应；以及通过所述带外通道转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站基于所述会话迁移响应建立与 所述用户设备的传输控制协议连接。
综上所述，本实施例的无线接入网内容分发网络基站可直接对用户设备所发的请求(例如HTTP请求)进行处理，如用户设备所请求的内容在无线接入网内容分发网络基站可找到，便可由无线接入网内容分发网络基站直接发送给用户设备，无须再将用户设备所发的请求送至核心内容分发网络装置27，据此，缓存标记服务器设备将可不再被布建，以达成提升下载速度以及节省布建缓存标记服务器的成本。
附图说明
图1是内容访问系统的结构图；
图2是依据本发明第一实施例的一内容访问系统的结构图；
图3是依据本发明第一实施例的无线接入网内容分发网络基站的结构图；
图4是依据本发明第一实施例的核心内容分发网络装置的结构图；
图5至图8是依据本发明第一实施例的内容访问系统的信令流程图；
图9是依据本发明一实施例的无线接入网内容分发网络基站的硬件结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
表1为与后续各实施例相关的缩略语和关键术语定义表，敬请参阅。
Figure PCTCN2016076773-appb-000001
Figure PCTCN2016076773-appb-000002
表1
图2是本发明第一实施例的一内容访问系统的结构图，由图2可知，所内容访问系统包含用户设备21、无线接入网内容分发网络基站23(可视为缓存边缘服务器)、服务网关/PDN网关25以及核心内容分发网络装置27(可视为缓存核心服务器)。用户设备21可发出内容请求(例如请求一视频)至无线接入网内容分发网络基站23，无线接入网内容分发网络基站23将检查是否有存储用户设备21所请求的内容，如果无线接入网内容分发网络基站23存储有用户设备21所请求的内容，则可发送给储用户设备21，无线接入网内容分发网络基站23与用户设备21的通讯可通过TCP连接达成，但不以此限制本实施例的应用。
如果无线接入网内容分发网络基站23未存储有储用户设备21所请求的内容，则透过带外通道(如图2虚线所示)将与用户设备21的会话迁移至核心 内容分发网络装置27，以使核心内容分发网络装置27通过无线接入网内容分发网络基站23以及服务网关/PDN网关25，发送用户设备21所请求的内容至用户设备21。以下将以图3至图8进行详细说明。
请参阅图3，其为无线接入网内容分发网络基站23的结构图，由图3可知，无线接入网内容分发网络基站23包含通讯器231、处理器233、存储器235、电源237以及入机接口239，处理器233耦接至通讯器231、存储器235以及入机接口239；电源317用于供电予通讯器231、处理器233以及入机接口239；存储器235可以存储提供给用户设备21的内容、操作系统和其他应用程序；入机接口239至少可供键盘239a以及显示屏239b连接，通讯器231用于无线接入网内容分发网络基站23与其他设备/装置或通信网络之间的通信。
请参阅图4，其为核心内容分发网络装置27的结构图，由图4可知，核心内容分发网络装置27包含通讯器271、处理器273以及存储器275，处理器273耦接至通讯器271以及存储器275，通讯器271用于核心内容分发网络装置27与其他设备/装置或通信网络之间的通信，存储器275可以存储提供给用户设备21的内容、操作系统和其他应用程序。为简明起见，下文将仅针对用户设备21、无线接入网内容分发网络基站23以及核心内容分发网络装置27在内容访问系统的作用进行说明。
请一并参阅图5，其绘示本发明第一实施例的内容访问系统的信令流程图，其可适用于图2的内容访问系统。于步骤301中，用户设备21发送TCP同步连接请求至无线接入网内容分发网络基站23，以建立用户设备21与无线接入网内容分发网络基站23间的TCP连接；于步骤302中，无线接入网内容分发网络基站23的通讯器231收到TCP同步连接请求后，发送TCP同步连接响应至用户设备21；于步骤303中，用户设备21因应TCP同步连接响应，发送TCP响应至无线接入网内容分发网络基站23；透过步骤301到步骤303完成三次握手流程后，用户设备21与无线接入网内容分发网络基站23间的TCP连接便可建立。
于步骤304中，用户设备21通过TCP连接发送超文本传输协议(HTTP,Hypertext Transfer Protocol)请求给无线接入网内容分发网络基站23，以向无线接入网内容分发网络基站23请求内容(例如请求一视频)。详细来说，以用户设备21的角度来看，用户设备21认为HTTP请求是将被发送至核心内容分发网络装置27，为了增加内容访问系统的效率；于步骤305中，无线接入网内容分发网络基站23的通讯器231接收来自用户设备21的HTTP请求后，无线接入网内容分发网络基站23的处理器233将基于HTTP请求，判断无线接入网内容分发网络基站23的存储器235是否存储有与HTTP请求相对应的内容。
如无线接入网内容分发网络基站23的存储器235存储有与HTTP请求相对应的内容，于步骤306中，无线接入网内容分发网络基站23的通讯器231通过带外信道发送带外消息至核心内容分发网络装置27，以通知核心内容分发网络装置27，第一无线接入网内容分发网络基站23通过TCP连接发送内容至用户设备21；于步骤307中，核心内容分发网络装置27的通讯器271通过带外信道收到带外消息，并将带外消息所携带的信息记录在存储器275中。
具体而言，发送至核心内容分发网络装置27的带外消息可包含IP流的五元组信息以及无线接入网内容分发网络基站23编号信息，核心内容分发网络装置27可将IP流的五元组信息以及无线接入网内容分发网络基站23编号信息记录在存储器275中，藉此，核心内容分发网络装置27便可得知目前是由无线接入网内容分发网络基站23通过TCP连接与用户设备21通讯，即目前在无线接入网内容分发网络基站23与用户设备21间，通过TCP连接进行一会话。
如无线接入网内容分发网络基站23的存储器235存储有与超文本传输协议请求相对应的内容，于步骤308中，无线接入网内容分发网络基站23的通讯器231通过TCP连接发送HTTP请求响应至用户设备21；于步骤309中，无线接入网内容分发网络基站23的通讯器271通过TCP连接，发送用 户设备21所请求的内容至用户设备21。
需注意者，步骤306需早于步骤307被实现，步骤308需早于步骤309被实现，但步骤306与步骤307以及步骤308与步骤309的实现并无一定的时间关系，例如实现的时间关系可为：(步骤308、步骤306、步骤307以及步骤309)以及(步骤308、步骤309、步骤306以及步骤307)等等。
如无线接入网内容分发网络基站23的存储器235未存储有与HTTP请求相对应的内容，请参阅图6，其绘示本发明第一实施例的内容访问系统的信令流程图，其可适用于图2的内容访问系统。于步骤310中，无线接入网内容分发网络基站23的通讯器231通过带外通道发送会话迁移请求至核心内容分发网络装置27，会话迁移请求携带TCP连接信息(TCP-Socket-information)、HTTP请求(HTTP request)，以将与用户设备21的会话迁移至核心内容分发网络装置27。
更具体来说，TCP连接信息可包含但不限于如表2的内容，表2中的本端是指无线接入网内容分发网络基站23。
Figure PCTCN2016076773-appb-000003
表2
于步骤311中，核心内容分发网络装置27的通讯器271通过带外通道 接收来自无线接入网内容分发网络基站23的会话迁移请求，核心内容分发网络装置27的处理器273基于会话迁移请求，通过通讯器271建立与所述用户设备的TCP连接。详言之，会话迁移请求包含TCP连接信息，因此核心内容分发网络装置27可基于表2所载的各项信息与与用户设备21建立TCP连接。
于步骤312中，处理器273于建立TCP连接后，通过通讯器271以及通过带外通道发送会话迁移响应至无线接入网内容分发网络基站23；于步骤313中，无线接入网内容分发网络基站23的通讯器231通过带外通道接收来自核心内容分发网络装置27的会话迁移响应，并基于所述会话迁移响应，停止接续与用户设备21的TCP连接。
于步骤314中，因为会话迁移请求携带HTTP请求，核心内容分发网络装置27的处理器273将基于HTTP请求，判断内容分发网络装置27的存储器275存储有与HTTP请求相对应的内容，并基于存储器275存储有与HTTP请求相对应的内容，通过通讯器271发送HTTP请求响应至用户设备21；于步骤315中，处理器273通过通讯器271以及通过与用户设备21的TCP连接，传送用户设备21所请求的内容至用户设备21。
接下来将说明无线接入网内容分发网络基站23存储有用户设备21所请求的内容，但用户设备21由无线接入网内容分发网络基站23(第一无线接入网内容分发网络基站)的信号范围移动至无线接入网内容分发网络基站29(第二无线接入网内容分发网络基站)的信号范围的情境。
请参阅图7，其绘示本发明第一实施例的内容访问系统的信令流程图，其可适用于图2的内容访问系统。接续前述说明，于步骤309中，无线接入网内容分发网络基站23的通讯器271通过TCP连接，发送用户设备21所请求的内容至用户设备21；接收完内容后，于步骤401中，用户设备21通过TCP连接发送确认消息，其中所述确认消息用于表示用户设备21已接收所请求的全部内容。
由于在接收所请求的全部内容后以及发出确认消息前，用户设备21移 动到其它无线接入网内容分发网络基站(即第二无线接入网内容分发网络基站29)的讯号范围，因此于步骤402中，无线接入网内容分发网络基站29透过TCP连接收到了确认消息，并以TCP头扩展字段的方式将无线接入网内容分发网络基站29的编号信息加入确认消息，并且发送包含无线接入网内容分发网络基站29的编号信息的确认消息至核心内容分发网络装置27。
于步骤403中，核心内容分发网络装置27的通讯器271透过TCP连接，收到来自无线接入网内容分发网络基站29的确认消息，处理器273根据确认消息所包含的无线接入网内容分发网络基站29的编号信息，确认用户设备21由无线接入网内容分发网络基站23移动至无线接入网内容分发网络基站29，并通过带外通道发送会话迁移请求至无线接入网内容分发网络基站23。
详言之，核心内容分发网络装置27在步骤307所纪录的带外消息包含无线接入网内容分发网络基站23的编号信息，据此，处理器273便可根据存储器275所存储的无线接入网内容分发网络基站23的编号信息以及确认消息所包含的无线接入网内容分发网络基站29的编号信息，确认用户设备21由无线接入网内容分发网络基站23的信号范围移动至无线接入网内容分发网络基站29的信号范围，并通过带外通道发送会话迁移请求至无线接入网内容分发网络基站23。
于步骤404中，无线接入网内容分发网络基站23的通讯器231通过带外通道，接收来自核心内容分发网络装置27的会话迁移请求，通讯器231基于会话迁移请求，停止接续与用户设备21的TCP连接；于步骤405中，无线接入网内容分发网络基站23的通讯器231因应所述会话迁移请求，通过带外通道发送会话迁移响应至核心内容分发网络装置27。需注意者，此处的会话迁移响应包含但不限于表2的信息。
于步骤406中，核心内容分发网络装置27的通讯器271因应会话迁移请求的发送，通过带外通道接收来自无线接入网内容分发网络基站23的会话迁移响应，并通过带外通道转发会话迁移响应至无线接入网内容分发网络 基站29；于步骤407中，无线接入网内容分发网络基站29接收会话迁移响应并根据会话迁移响应建立与与用户设备21的TCP连接；于步骤408中，无线接入网内容分发网络基站29基于会话迁移响应的接收以及TCP连接的建立，通过带外信道发送响应消息至核心内容分发网络装置27；于步骤409中，无线接入网内容分发网络基站29通过TCP连接发送HTTP响应至用户设备21，在此之后，用户设备21所发出的HTTP请求将由无线接入网内容分发网络基站29处理。
接下来将说明无线接入网内容分发网络基站23存储有用户设备21所请求的内容，但用户设备21在未全部接收完其所请求的内容，便由无线接入网内容分发网络基站23(第一无线接入网内容分发网络基站)的信号范围移动至无线接入网内容分发网络基站29(第二无线接入网内容分发网络基站)的信号范围的情境。
请参阅图8，其绘示本发明第一实施例的内容访问系统的信令流程图，其可适用于图2的内容访问系统。与图7的信令流程图相比之下，步骤309将由步骤309a、步骤309b以及步骤309c取代。于步骤309a中，无线接入网内容分发网络基站23的通讯器231透过TCP连接，传送内容的第一部分至用户设备21；于步骤309b中，因应用户设备21移动到无线接入网内容分发网络基站29的讯号范围，无线接入网内容分发网络基站23的通讯器231送内容的第二部分至无线接入网内容分发网络基站29，于步骤309c中，因应用户设备21移动至无线接入网内容分发网络基站29的讯号范围，无线接入网内容分发网络基站29传送内容的第二部分至用户设备21，使用户设备21可完整地收到所有内容。具体来说，各个无线接入网内容分发网络基站间皆可互相沟通，因此当用户设备21移动到无线接入网内容分发网络基站29的讯号范围，无线接入网内容分发网络基站23亦会得知用户设备11已移动至无线接入网内容分发网络基站29，便可将内容的第二部分透过后端网络送至无线接入网内容分发网络基站29，再由无线接入网内容分发网络基站29传送内容的第二部分至用户设备21。于图8的步骤309c后的所有 步骤皆已绘示与说明于图7及其相关叙述，在此不加赘述。
综上所述，本实施例的无线接入网内容分发网络基站可直接对用户设备所发的请求(例如HTTP请求)进行处理，如用户设备所请求的内容在无线接入网内容分发网络基站可找到，便可由无线接入网内容分发网络基站直接发送给用户设备，无须再将用户设备所发的请求送至核心内容分发网络装置27，据此，缓存标记服务器设备将可不再被布建，以达成提升下载速度以及节省布建缓存标记服务器的成本。
图9是依据本发明一实施例的无线接入网内容分发网络基站5的硬件结构示意图。如图9所示，无线接入网内容分发网络基站5包括处理器51、存储器52、输入/输出接口53、通信接口54和总线55。其中，处理器51、存储器52、输入/输出接口53和通信接口54通过总线55实现彼此之间的通信连接。
处理器51可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本发明实施例所提供的技术方案。
存储器52可以是只读存储器(Read Only Memory，ROM)，静态存储设备，动态存储设备或者随机存取存储器(Random Access Memory，RAM)。存储器52可以存储操作系统和其他应用程序。在通过软件或者固件来实现本发明实施例提供的技术方案时，用于实现本发明实施例提供的技术方案的程序代码保存在存储器52中，并由处理器51来执行。
输入/输出接口53用于接收输入的数据和信息，输出操作结果等数据。
通信接口54使用例如但不限于通讯器以及通讯模块一类的收发装置，来实现无线接入网内容分发网络基站5与其他设备或通信网络之间的通信。
总线55可包括一通路，在无线接入网内容分发网络基站5各个部件(例如处理器51、存储器52、输入/输出接口53和通信接口54)之间传送信息。
应注意，尽管图9所示的无线接入网内容分发网络基站5仅仅示出了处 理器51、存储器52、输入/输出接口53、通信接口54以及总线55，但是在具体实现过程中，本领域的技术人员应当明白，无线接入网内容分发网络基站5还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，无线接入网内容分发网络基站5还可包含实现其他附加功能的硬件器件。此外，本领域的技术人员应当明白，无线接入网内容分发网络基站5也可仅仅包含实现本发明实施例所必须的器件或模块，而不必包含图9中所示的全部器件。
图9所示的硬件结构以及上述描述适用于本发明实施例所提供的各种核心内容分发网络装置以及用户设备。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，上述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，上述的存储介质可为磁盘、光盘、只读存储记忆体(ROM：Read-Only Memory)或随机存储记忆体(RAM：Random Access Memory)等。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。
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Claims (16)

  1. 一种用于第一无线接入网内容分发网络基站的内容访问方法，其特征在于，包括：
    通过與用户设备的传输控制协议连接，接收来自所述用户设备的超文本传输协议请求；
    基于所述超文本传输协议请求，判断所述无线接入网内容分发网络基站是否存储有与所述超文本传输协议请求相对应的内容；以及
    基于所述第一无线接入网内容分发网络基站存储有与所述超文本传输协议请求相对应的内容，通过所述传输控制协议连接，发送所述内容至所述用户设备。
  2. 如权利要求1所述的内容访问方法，其特征在于，进一步包括：
    通过带外通道发送带外消息至核心内容分发网络装置，以通知所述核心内容分发网络装置，所述第一无线接入网内容分发网络基站通过所述传输控制协议连接发送所述内容至所述用户设备。
  3. 如权利要求1所述的内容访问方法，其特征在于，进一步包括：
    基于所述第一无线接入网内容分发网络基站未存储有与所述超文本传输协议请求相对应的内容，通过所述带外通道发送会话迁移请求至所述核心内容分发网络装置；
    因应所述会话迁移请求的发送，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移响应；以及
    基于所述会话迁移响应，停止接续与所述用户设备的所述传输控制协议连接。
  4. 如权利要求1所述的内容访问方法，其特征在于，进一步包括：
    于传送所述内容后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；
    基于所述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及
    因应所述会话迁移请求，通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至另一无线接入网内容分发网络基站，所述另一无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
  5. 如权利要求1所述的内容访问方法，其特征在于，所述发送所述内容至所述用户设备的步骤进一步包括：
    通过所述传输控制协议连接，传送所述内容的第一部分至所述用户设备；以及
    因应所述用户设备移动至第二无线接入网内容分发网络基站的讯号范围，传送所述内容的第二部分至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站传送所述内容的第二部分至所述用户设备。
  6. 如权利要求5所述的内容访问方法，其特征在于，进一步包括：
    于传送所述内容的第二部分至所述用户设备后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；
    基于所述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及
    通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，所述第二无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
  7. 一种用于核心内容分发网络装置的内容访问方法，其特征在于，包括：
    通过带外通道接收来自无线接入网内容分发网络基站的会话迁移请求，其中所述会话迁移请求是因所述无线接入网内容分发网络基站未存储用户设备所请求的内容而被发送；
    基于所述会话迁移请求，建立与所述用户设备的传输控制协议连接；
    于建立所述传输控制协议连接后，通过所述带外通道发送会话迁移响应至所述无线接入网内容分发网络基站，以使所述无线接入网内容分发网络基站基于所述会话迁移响应，停止接续与用户设备的所述传输控制协议连接；以及
    通过所述传输控制协议连接，发送所述用户设备所请求的内容至用户设备。
  8. 一种用于核心内容分发网络装置的内容访问方法，其特征在于，包括：
    通过传输控制协议连接，接收来自第二无线接入网内容分发网络基站的确认消息，其中所述确认消息用于确认用户设备已接收所请求的全部内容；
    基于所述确认消息，判断所述用户设备已由第一无线接入网内容分发网络基站移动至所述第二无线接入网内容分发网络基站；
    基于所述判断，通过所述带外通道发送会话迁移请求至第一无线接入网内容分发网络基站；
    因应所述会话迁移请求的发送，通过所述带外通道接收来自所述第一无线接入网内容分发网络基站的会话迁移响应；以及
    通过所述带外通道转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站基于所述会话迁移响应建立与所述用户设备的传输控制协议连接。
  9. 一种第一无线接入网内容分发网络基站，其特征在于，包括：
    通讯器，用于透过与用户设备的传输控制协议连接，接收来自所述用户设备的超文本传输协议请求；以及
    处理器，用于基于所述超文本传输协议请求，判断所述无线接入网内容分发网络基站是否存储有与所述超文本传输协议请求相对应的内容；
    其中，所述通讯器进一步用于基于所述第一无线接入网内容分发网络基站存储有与所述超文本传输协议请求相对应的内容，通过所述传输控制协议连接，发送所述内容至所述用户设备。
  10. 如权利要求9所述的第一无线接入网内容分发网络基站，其特征在于，所述通讯器进一步用于：
    通过带外通道发送带外消息至核心内容分发网络装置，以通知所述核心内容分发网络装置，所述第一无线接入网内容分发网络基站通过所述传输控制协议连接发送所述内容至所述用户设备。
  11. 如权利要求9所述的第一无线接入网内容分发网络基站，其特征在于，所述通讯器进一步用于：
    基于所述无线接入网内容分发网络基站未存储有与所述超文本传输协议请求相对应的内容，通过所述带外通道发送会话迁移请求至所述核心内容分发网络装置；
    因应所述会话迁移请求的发送，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移响应；以及
    基于所述会话迁移响应，停止接续与所述用户设备的所述传输控制协议连接。
  12. 如权利要求9所述的第一无线接入网内容分发网络基站，其特征在于，所述通讯器进一步用于：
    于传送所述内容后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；
    基于所述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及
    因应所述会话迁移请求，通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至另一无线接入网内容分发网络基站，所述另一无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
  13. 如权利要求9所述的第一无线接入网内容分发网络基站，其特征在于，所述通讯器进一步用于：
    通过所述传输控制协议连接，传送所述内容的第一部分至所述用户设 备；以及
    因应所述用户设备移动至第二无线接入网内容分发网络基站的讯号范围，传送所述内容的第二部分至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站传送所述内容的第二部分至所述用户设备。
  14. 如权利要求13所述的第一无线接入网内容分发网络基站，其特征在于，所述通讯器进一步用于：
    于传送所述内容的第二部分至所述用户设备后，通过所述带外通道接收来自所述核心内容分发网络装置的会话迁移请求；
    基于所述会话迁移请求，停止接续与所述用户设备的所述传输控制协议连接；以及
    通过所述带外通道发送会话迁移响应至所述核心内容分发网络装置，其中所述核心内容分发网络装置转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，所述第二无线接入网内容分发网络基站根据所述会话迁移响应与所述用户设备建立所述传输控制协议连接。
  15. 一种核心内容分发网络装置，其特征在于，包括：
    通讯器，用于通过带外通道接收来自无线接入网内容分发网络基站的会话迁移请求，其中所述会话迁移请求是因所述无线接入网内容分发网络基站未存储用户设备所请求的内容而被发送；以及
    处理器，用于基于所述会话迁移请求，建立与所述用户设备的传输控制协议连接；
    其中，所述处理器进一步用于于建立所述传输控制协议连接后，通过所述带外通道发送会话迁移响应至所述无线接入网内容分发网络基站，以使所述无线接入网内容分发网络基站基于所述会话迁移响应，停止接续与用户设备的所述传输控制协议连接，以及所述处理器进一步用于通过所述传输控制协议连接，发送所述用户设备所请求的内容至用户设备。
  16. 一种核心内容分发网络装置，其特征在于，包括：
    通讯器，用于通过传输控制协议连接，接收来自第二无线接入网内容分发网络基站的确认消息，其中所述确认消息用于确认用户设备已接收所请求的全部内容；以及
    处理器，用于基于所述确认消息，判断所述用户设备已由第一无线接入网内容分发网络基站的信号范围移动至所述第二无线接入网内容分发网络基站的信号范围；
    其中，所述通讯器进一步用于：
    基于所述用户设备已由第一无线接入网内容分发网络基站的信号范围移动至所述第二无线接入网内容分发网络基站的信号范围，通过带外通道发送会话迁移请求至所述用户设备；
    因应所述会话迁移请求的发送，通过所述带外通道接收来自所述第一无线接入网内容分发网络基站的会话迁移响应；以及
    通过所述带外通道转发所述会话迁移响应至所述第二无线接入网内容分发网络基站，以使所述第二无线接入网内容分发网络基站基于所述会话迁移响应建立与所述用户设备的传输控制协议连接。
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