WO2017125017A1 - Procédé pour ajuster un contenu d'antémémoire, dispositif et système - Google Patents

Procédé pour ajuster un contenu d'antémémoire, dispositif et système Download PDF

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Publication number
WO2017125017A1
WO2017125017A1 PCT/CN2017/071541 CN2017071541W WO2017125017A1 WO 2017125017 A1 WO2017125017 A1 WO 2017125017A1 CN 2017071541 W CN2017071541 W CN 2017071541W WO 2017125017 A1 WO2017125017 A1 WO 2017125017A1
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Prior art keywords
code rate
network
index
terminal
cache server
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PCT/CN2017/071541
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English (en)
Chinese (zh)
Inventor
熊勤
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中兴通讯股份有限公司
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Publication of WO2017125017A1 publication Critical patent/WO2017125017A1/fr

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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
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
    • 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
    • H04L65/60—Network streaming of media packets
    • 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
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device, and system for adjusting cached content.
  • the Content Delivery Network is a new type of network construction. It is a network overlay optimized for the release of broadband rich media in the traditional Internet Protocol (IP).
  • IP Internet Protocol
  • the content service provided by the CDN is based on a cache server, also known as a proxy cache, which is located at the edge of the network and is only "one hop away" from the user.
  • the proxy cache is a transparent image of the content provider source server (usually located in the data center of the CDN service provider).
  • the CDN system includes distributed storage, load balancing, network request redirection, and content management. It usually consists of an operation and maintenance management platform, a global redirection module, a load balancing module, and multiple cache servers.
  • the terminal is in the cache.
  • the global redirection module redirects the request to a load balancing module.
  • Each load balancing module mounts multiple cache servers. After receiving the request, the load balancing module receives the request. The request is forwarded to the cache server according to certain rules, and the cache server finally processes the request and returns a response to the terminal service.
  • the video fragment returned by the cache server to the terminal may have a delay in the transmission process, and the terminal cannot receive the high-rate media file provided by the cache server in time, which may cause the playback to be stuck. At this point, the terminal will try to request the next high bit rate media file fragmentation from the cache server. If the current network bandwidth still cannot meet the transmission requirement of the next highest bit rate media file fragmentation, the terminal will still play the card stall situation; consider comparing In extreme cases, the terminal can only obtain smooth video segments after multiple attempts, which will inevitably affect the user experience;
  • the invention provides a method, a device and a system for adjusting a cached content, so as to at least solve the problem that a terminal plays a video jam in a related art.
  • a method for adjusting cached content including:
  • the cache server in the content distribution network system receives an address range in which the network condition is deteriorated and a service code rate corresponding to the address range;
  • the cache server receives a media service request of the terminal, where the media service request carries an address of the terminal;
  • the cache server adjusts the index code rate to be lower than the code rate of the service code rate,
  • the index code rate is a code rate of the media file information in the index file requested by the media service request;
  • the cache server sends the index file to the terminal, where the index file carries the adjusted index code rate.
  • the buffer server adjusts the index code rate to a code rate smaller than the service code rate, including:
  • the cache server deletes the media file information that meets the following conditions: an index code rate corresponding to the media file information is higher than the service code rate.
  • the network condition is determined to be deteriorated in the following cases:
  • the network status parameter is within a preset network condition degradation range, wherein the network status parameter is a network status parameter of an uplink and/or downlink device of the address range on the cache server.
  • the network status parameter includes at least one of the following:
  • Traffic parameters bandwidth parameters, delay rates, and packet loss rates.
  • the address range includes: an internet protocol IP address segment.
  • an apparatus for adjusting cached content which is located in a cache server in a content distribution network system, and includes:
  • a first receiving module configured to receive an address range in which network conditions are deteriorated and a service code rate corresponding to the address range
  • a second receiving module configured to receive a media service request of the terminal, where the media service request carries an address of the terminal
  • an adjusting module configured to adjust the index code rate to be lower than a code rate of the service code rate when an address of the terminal is in the address range and an index code rate is higher than the service code rate
  • the index code rate is a code rate of media file information in an index file requested by the media service request
  • the sending module is configured to send the index file to the terminal, where the index file carries the adjusted index code rate.
  • the adjusting module includes:
  • And deleting the unit configured to delete the media file information that meets the following conditions: the index code rate corresponding to the media file information is higher than the service code rate.
  • the network condition is determined to be deteriorated in the following cases:
  • the network status parameter is within a preset network condition degradation range, wherein the network status parameter is a network status parameter of an uplink and/or downlink device of the address range on the cache server.
  • the network status parameter includes at least one of the following:
  • Traffic parameters bandwidth parameters, delay rates, and packet loss rates.
  • the address range includes: an internet protocol IP address segment.
  • a system for adjusting cached content including: a terminal, Network detection device, network monitoring server, operation and maintenance management platform and cache server;
  • the network detecting device is located in an uplink and/or a downlink device of the cache server, and configured to detect a network state parameter
  • the network monitoring server collects the network state parameter of the network detecting device, determines an address range in which the network condition is deteriorated, and a service code rate corresponding to the address range;
  • the operation and maintenance management platform of the content distribution network system sends the address range in which the network condition is deteriorated and the service code rate corresponding to the address range to the cache server;
  • the cache server receives a media service request of the terminal, where the media service request carries an address of the terminal;
  • the cache server adjusts the index code rate to be lower than the code rate of the service code rate,
  • the index code rate is a code rate of the media file information in the index file requested by the media service request;
  • the cache server sends the index file to the terminal, where the index file carries the adjusted index code rate.
  • the cache server in the content distribution network system receives an address range in which the network condition is deteriorated and a service code rate corresponding to the address range, and the cache server receives the media service request of the terminal, wherein the media service request carries the terminal An address, where the address of the terminal is within the address range, and the index code rate is higher than the service code rate, the cache server adjusts the index code rate to a code rate smaller than the service code rate, where The index code rate is a code rate of the media file information in the index file requested by the media service request, and the cache server sends the index file to the terminal, wherein the index file carries the adjusted index code rate, and the solution is solved.
  • the problem of playing video jams in the terminal improves the smoothness of video playback.
  • FIG. 1 is a flowchart of a method for adjusting cache contents according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of an apparatus for adjusting cache contents according to an embodiment of the present invention
  • FIG. 3 is a system framework diagram of network-aware cache content adjustment in accordance with a preferred embodiment of the present invention.
  • FIG. 4 is a flow diagram of a streaming media service method for single adaptive network condition changes in accordance with a preferred embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for adjusting cached content according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 The cache server in the content distribution network system receives an address range in which the network condition is deteriorated and a service code rate corresponding to the address range;
  • Step S104 the cache server receives a media service request of the terminal, where the media service request carries an address of the terminal;
  • Step S106 If the address of the terminal is in the address range, and the index code rate is higher than the service code rate, the cache server adjusts the index code rate to a code rate smaller than the service code rate, where The index code rate is a code rate of the media file information in the index file requested by the media service request;
  • Step S108 The cache server sends the index file to the terminal, where the index file carries the adjusted index rate.
  • the cache server adjusts the index rate to a code rate smaller than the service code rate, and the cache server sends an index file carrying the adjusted index rate to the terminal, which solves the problem that the terminal plays the video card.
  • the problem is to increase the flow of video playback.
  • the buffer server adjusts the index rate to a code rate smaller than the service code rate, including:
  • the cache server deletes the media file information that satisfies the condition that the index code rate corresponding to the media file information is higher than the service code rate.
  • the network condition is determined to be deteriorated in the following situation: determining that the network status parameter is within a preset network condition deterioration range, wherein the network status parameter is an uplink of the address range on the cache server and/or a network status of the downlink device parameter.
  • the network status parameter includes at least one of the following: a traffic parameter, a bandwidth parameter, a delay rate, and a packet loss rate, where the address range includes: an Internet Protocol IP address segment.
  • a device for adjusting the content of the cache is also provided.
  • the device is used to implement the foregoing embodiments and the preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 2 is a structural block diagram of an apparatus for adjusting cache contents according to an embodiment of the present invention. As shown in FIG. 2, in a cache server in a content distribution network system, the apparatus includes
  • the first receiving module 22 is configured to receive an address range in which the network condition is deteriorated and a service code rate corresponding to the address range;
  • the second receiving module 24 is connected to the first receiving module 22, and is configured to receive a media service request of the terminal, where the media service request carries an address of the terminal;
  • the adjustment module 26 is connected to the second receiving module 24, wherein the address of the terminal is within the address range, And if the index code rate is higher than the service code rate, adjusting the index code rate to a code rate smaller than the service code rate, wherein the index code rate is a media file in an index file requested by the media service request The code rate of the information;
  • the sending module 28 is connected to the adjusting module 26, and configured to send the index file to the terminal, where the index file carries the adjusted index rate.
  • the cache server adjusts the index rate to a code rate lower than the service code rate, and the cache server sends the index file that carries the adjusted index rate to the terminal, thereby solving the problem that the terminal plays the video card.
  • the problem is to increase the flow of video playback.
  • the adjustment module 26 includes:
  • a deleting unit configured to delete the media file information that meets the following conditions: the index code rate corresponding to the media file information is higher than the service code rate.
  • the network condition is determined to be deteriorated by determining that the network status parameter is within a preset network condition degradation range, wherein the network status parameter is an uplink and/or downlink device of the address range on the cache server.
  • Network status parameters includes at least one of the following: a traffic parameter, a bandwidth parameter, a delay rate, and a packet loss rate.
  • the address range includes: Internet Protocol IP address segment.
  • a system for adjusting cached content including: a terminal, a network detecting device, a network monitoring server, an operation and maintenance management platform, and a cache server;
  • the network detecting device is located in an uplink and/or a downlink device of the cache server, and is configured to detect a network state parameter
  • the network monitoring server collects the network state parameter of the network detecting device, determines an address range in which the network condition is deteriorated, and a service code rate corresponding to the address range;
  • the operation and maintenance management platform of the content distribution network system sends the address range in which the network condition is deteriorated and the service code rate corresponding to the address range to the cache server;
  • the cache server receives a media service request of the terminal, where the media service request carries an address of the terminal;
  • the cache server adjusts the index code rate to a code rate smaller than the service code rate, where the index code rate Is the code rate of the media file information in the index file requested by the media service request;
  • the cache server sends the index file to the terminal, where the index file carries the adjusted index rate.
  • a preferred embodiment of the present invention relates to the field of multimedia services in telecommunications networks such as CDNs (Content Distribution Networks), and more particularly to a system and method for network-aware cache content adjustment in a CDN multimedia service system.
  • CDNs Content Distribution Networks
  • the technical problem to be solved by the preferred embodiment of the present invention is to notify the cache server of the network status when the network condition is deteriorated, and the cache server provides a media service file suitable for the code rate according to the network bandwidth of each user terminal, so that the terminal can be smooth.
  • the main steps of playing the media service file include: network pattern side device collection network
  • the Network Monitor notifies the CDN of the network condition message, and the message carries the IP address segment of the network deterioration and its corresponding limited service code rate; the CDN internally broadcasts the network condition information to all the cache servers; the terminal to the cache server When requested, the cache server checks whether the terminal IP is in the range of network deterioration, and returns a media service file corresponding to the range and whose code rate is less than the limit code rate to the terminal; the terminal receives the media service file for service.
  • the preferred embodiment of the present invention provides a media service file suitable for the current network bandwidth by the cache server based on the knowledge of the network change, which reduces the situation in which the terminal plays the video card and improves the user experience; After the condition is restored, the normal bit rate can be restored to provide services to the user terminal.
  • a preferred embodiment of the present invention provides a system for network-aware cache content adjustment, which comprises a network monitoring server, an operation and maintenance management platform, a plurality of cache servers, and a user terminal;
  • the network detecting device is deployed at the edge of the network to collect the network running status, and the network running status may include, but is not limited to, network traffic, bandwidth, delay rate, and packet loss rate.
  • the network detecting device may be one or more. Deployed on the cache server's uplink data device, or in the downlink data device.
  • the network monitoring server collects network status parameters sent by the network detecting device deployed on the cache server and connected to the network.
  • the parameters may include, but are not limited to, traffic, bandwidth, delay rate, and packet loss rate.
  • the network monitoring server is saved in a summary; the network monitoring server is configured.
  • the network service level (code rate) information of the network state parameter is notified to the CDN operation and maintenance management platform;
  • Operation and maintenance management platform provides the function of sending a message to the cache server and receiving the performance report of the cache server in the CDN.
  • the operation and maintenance management platform is responsible for receiving the IP address segment delivered by the network monitoring server and the corresponding Network service level (code rate) information, and the network service level information is sent to all cache servers;
  • the cache server is used to process the media service request of the user terminal, and can provide the media service function to the user terminal in a unicast manner.
  • the form of the media service function may include but is not limited to the following: media video on demand, media video live broadcast
  • the IP address segment delivered by the operation and maintenance management platform and its corresponding network service level (code rate) are stored and saved according to the network service.
  • Level information the content of the media service request of the user terminal is deleted, and the code rate index file corresponding to the current network service level is deleted; the code rate control is performed, and the user terminal is provided to adapt to the current network without affecting the smooth play.
  • Bandwidth media service file
  • the user terminal sends a media service request to the cache server, and can receive the unicast code stream sent by the cache server;
  • the cache server stores media files of various code rates and index files that mark information of the media files.
  • the terminal requests the media service from the cache server, the terminal first requests the index file and saves it locally. After receiving the index file, the terminal selects the media file fragment with the highest code rate in the index file, and requests the service from the cache server. After receiving the request, the cache server returns the corresponding media file fragment in the request to the terminal, and provides a service for playing while downloading.
  • a preferred embodiment of the present invention provides a system and method for network-aware cache content adjustment, comprising the steps of:
  • the network detecting device deployed on the cache server periodically collects the uplink network state parameter of the current cache server to the network monitoring server;
  • the network detecting device deployed in the cache server periodically collects the uplink network state parameter of the current cache server to the network monitoring server;
  • the network monitoring server monitors the network state parameters of the cache server uplink and downlink, and sets the network service level classification configuration, and then determines the network condition parameters of the corresponding IP segment of the cache server uplink and downlink, when the network deteriorates, Sending the IP address segment with reduced network bandwidth and the network service level (that is, the code rate) allowed by the corresponding address segment to the operation and maintenance management platform;
  • the operation and maintenance management platform After receiving the message corresponding to the IP address segment and the network service level sent by the network monitoring server, the operation and maintenance management platform synchronizes the information to all the cache servers;
  • the cache server Before receiving the information, the cache server still considers that the network condition has not changed, and provides the user terminal with the media service file with the highest code rate in the index file by default;
  • the cache server After receiving the correspondence between the IP address segment and the network service level, the cache server is saved locally on the server;
  • the cache server determines whether the IP address of the user terminal is within the IP address segment where the network condition is monitored by the network monitoring server. If the network condition is deteriorated, the IP segment needs to be determined.
  • the terminal After receiving the index file that is higher than the qualified bit rate, the terminal selects the media service file with the highest bit rate and requests from the cache server. At this time, the media service file can adapt to the bandwidth transmission of the current network, and the cache server will media service. After the file is sent to the terminal without blocking, the terminal can provide smooth video service;
  • the network monitoring server will send the IP address segment and its allowed network service level (code rate) to the operation and maintenance management platform again.
  • the network service level (code rate) will also be Increase accordingly;
  • the operation and maintenance management platform After receiving the corresponding information of the IP address segment and the network service level, the operation and maintenance management platform synchronizes the information to each cache server, and each cache server saves the information locally;
  • the cache server still sends the low bit rate file to the terminal;
  • the cache server If the user terminal requests a new media service from the cache server, the same as the previous business process when the network is deteriorated, the index file on the cache server is requested first, and the cache server first checks whether the IP of the terminal is within the IP segment range, and then according to the Corresponding to the service level of the IP segment, the media file information in the index file whose code rate is not higher than the service level is returned to the terminal. Since the service level has been improved, the terminal can provide the media service file with a higher code rate.
  • a technical solution constructed by using the method disclosed in the preferred embodiment of the present invention when the network condition changes, the cache server adaptively provides the media service file suitable for the code rate to the terminal according to the current network bandwidth, so that the network condition deteriorates.
  • the user terminal does not need to repeatedly obtain a media service file suitable for the code rate by the cache server, thereby reducing the terminal playing the card and improving the user experience.
  • the present invention can delete the media index of the high bit rate in the cache server. File to achieve the purpose of reducing storage; when the network conditions are restored, the media service file provided by the cache server to the terminal can be restored to the normal bit rate.
  • FIG. 3 is a system framework diagram of network-aware cache content adjustment according to a preferred embodiment of the present invention. As shown in FIG. 3, this embodiment provides a network-aware cache content adjustment system and method, including a network.
  • the network monitoring device (Network Monitor) and the network detecting device 1 are deployed on the cache server for uplink, and the network detecting device 2 is deployed in the cache server to be connected, one operation and maintenance server, one load balancing module, multiple cache servers, and multiple user terminals (UE1). , UE2, UE3...UEM, UE is User Equipment).
  • FIG. 4 is a flowchart of a method for streaming media service with a single adaptive network condition change according to a preferred embodiment of the present invention. As shown in FIG. 4, the steps of the method include:
  • Step S400 the network detecting device 1 and the network detecting device 2 periodically collect the traffic of the network and the cache hit ratio to the network monitoring server;
  • Step S401 When the network condition does not change, the cache server provides the service to the UE according to the normal code rate.
  • Step S402 The network monitoring server detects that the network condition is deteriorated, and sends the IP segment with the deteriorated network condition and the corresponding service level (code rate) to the operation and maintenance management platform;
  • Step S403 After receiving the message, the operation and maintenance management platform synchronizes the message to all the cache servers, and after receiving the information, the cache server stores the information locally;
  • Step S404 The UE requests the media service from the cache server, and all requests are sent to the load balancing module first;
  • Step S405 The load balancing module redirects the request to a specific cache server according to a certain algorithm.
  • Step S406 The cache server determines whether the IP of the UE belongs to a range in which the locally saved network condition is deteriorated. If the UE belongs to the range of network degradation, compare the code rate in the index file corresponding to the requested media service and the IP segment limited code rate. the size of;
  • Step S407 If there is media file information in the index file that is higher than the defined code rate, the cache server will clear the information and return the processed index file to the UE;
  • Step S408 After receiving the index file, the UE preferentially selects the media service file with the highest code rate, and the media service file can be normally transmitted in the network with the current bandwidth reduction without affecting the playback fluency, and the user is best served as much as possible.
  • Step S409 The UE requests a media service file from the cache server.
  • Step S410 The cache server returns a media service file to the UE, and the UE starts to provide a video playback service.
  • a content distribution network is provided to provide a smooth media for a terminal by sensing network changes.
  • the method of the physical service is used to control the index in the media service file by the cache server when the network condition is deteriorated and the bandwidth is reduced, thereby reducing the code rate and providing the media service file that can be smoothly played by the terminal, thereby improving the user experience and replacing the terminal.
  • the cache server when the network is deteriorated, adaptively controls the code rate of the media service file.
  • the entire process is similar to the above process, and is also within the scope of protection of the present invention.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the storage medium may be configured to store program code for performing the method steps of the above embodiment:
  • the storage medium is further arranged to store program code for performing the method steps of the above-described embodiments:
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor performs the method steps of the foregoing embodiments according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any What specific hardware and software are combined.
  • the invention is applicable to the field of communication, and is used for solving the problem that the terminal plays the video card and improves the smoothness of the video playing.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé pour ajuster un contenu d'antémémoire, un dispositif et un système, le procédé comprenant: un serveur cache dans un système de réseau de distribution de contenu reçoit une plage d'adressage dans laquelle une condition de réseau est détériorée et un débit binaire de service correspondant à la plage d'adressage; le serveur cache reçoit une demande de service multimédia d'un terminal, la demande de service multimédia contenant une adresse du terminal; si l'adresse du terminal se trouve dans la plage d'adressage et qu'un débit binaire d'index est supérieur au débit binaire de service, le serveur cache ajuste le débit binaire d'index afin que celui-ci soit inférieur au débit binaire de service, le débit binaire d'index étant un débit binaire d'informations de fichier multimédia dans un fichier d'index demandé par la requête de service multimédia; et le serveur cache envoie le fichier d'index au terminal, le fichier d'index comprenant le débit binaire d'index obtenu après ajustement. Au moyen de l'invention, le problème selon lequel une vidéo peut être coincée lorsqu'un terminal lit la vidéo est résolu, ce qui permet une lecture aisée de la vidéo.
PCT/CN2017/071541 2016-01-20 2017-01-18 Procédé pour ajuster un contenu d'antémémoire, dispositif et système WO2017125017A1 (fr)

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CN201610041473.5A CN106993014B (zh) 2016-01-20 2016-01-20 缓存内容的调整方法、装置及系统

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