With the development of network technology, the bandwidth that network operators can provide to users is getting higher and higher, but the revenue has not been correspondingly increased, and the ARPU value of broadband users has been declining. Telecom operators have been exploring differentiated operations and providing differentiated services to users to increase business revenue, but the results are not obvious.
Since 2011, operators have focused on the research of intelligent pipelines. They hope to provide better services to users through effective improvement and integration of networks, increase business revenue, and enhance the position of network operators in the industry chain. Operators propose to be the leader of intelligent pipelines to achieve user identifiability, service differentiation, traffic control, and network manageability. On this basis, the extension to the quality of the business is guaranteed to enhance the user experience.
User service experience is difficult to protect
The main needs of the user can be described as: when watching a video, a high-definition picture is required, and the playback is smooth; when downloading a file, the download speed is desired to be fast. The current problem is: Many times, users watch online video, need to buffer for a period of time, and often appear stuck, mosaic, etc. when viewing; even the video page will prompt: "The current network status is not good, please choose SD mode, "The current network status is not good, it is recommended to buffer for a while to watch", etc.; when downloading files, there is a low download rate, even there is no seed, the download link is abnormally interrupted.
In order to solve the above problems, operators and Internet content providers have their own solutions.
The telecom operator adopts the BoD solution to provide users with higher bandwidth and quality assurance. However, this solution has the following problems: the network layer has limited support capability and lacks application layer guarantee. Simple network speedup cannot solve the user's problem.
The solution adopted by Internet content providers is to deploy or rent CDN (Content Distribution Network) services to speed up content distribution. However, this solution has the following problems: it cannot break the limitation of network bandwidth and cannot provide a higher rate; it is limited by network quality and cannot guarantee the user experience; the acceleration of CDN and the non-coordination of the network can also cause network congestion and affect the network. Performance and stability, at the same time, packet loss caused by congestion will inevitably affect the quality of service. It can be seen that the CDN acceleration alone cannot solve the user's problem.
Starting from the user's experience requirements, there are two main factors that affect the user experience. One is network quality, and the other is the quality of application service. If both can be guaranteed, the user's business experience can be fundamentally guaranteed. .
Therefore, we hope to combine the guarantee of the network layer with the guarantee of the application layer to achieve specific protection for specific content requested by a specific user. Users do not need to go to a specific page to apply for network acceleration or application security, just click on the required content on the application interface they use, you can get the joint guarantee of application and network. Specifically, it is transparent to the user.
Application and network linkage plan
In order to achieve joint acceleration of applications and networks, three issues need to be addressed.
Network layer acceleration and protection
Since the network above the BRAS/SR is packet statistical multiplexing and does not have user-level management and control, it is difficult to perform policy control and quality assurance based on the user. Therefore, it is recommended to move the content distribution node down to the BRAS/SR to effectively avoid the congestion point in the network; the network quality guarantee in the BRAS/SR user-side port and below can be borrowed by BoD.
Application layer acceleration and protection
The application layer acceleration and guarantee can be borrowed from the current CDN application acceleration and guarantee methods, and can also be combined with P2P+CDN or P2SP+CDN.
Network layer and application layer collaboration
On the basis of network layer acceleration and guarantee and application acceleration and guarantee, in order to achieve specific application content requested by a specific user and to guarantee for a specific time period, it is necessary to combine the two. The BRAS/SR device integrates the CDN function, provides a dedicated service board to provide CDN services for users, establishes and maintains a user service state machine, and can effectively cooperate and link with the user state machine at the network layer (see figure).
After the user clicks on a specific, high-level application on the application page, the network layer bandwidth can be automatically improved during the use of the application content; at the same time, the application content is accelerated and guaranteed, and the acceleration and security can be implemented by using P2SP mode and multiple CDN nodes. At the same time, the user is transmitted, and other users who are using the application content can also transmit to the user. At the same time, users get the joint acceleration and guarantee of application and network, and the experience is improved.
Four application values ​​of the joint program
The application value of this solution can be analyzed from four perspectives: users, telecom operators, Internet content providers, devices and solution providers.
Based on the user's point of view, the clarity and fluency of the user watching online video is improved, and ultra-high-speed large file downloading can be realized. According to the existing equipment and network conditions, the download rate of 1 Gbit/s can theoretically be provided, compared with the existing one. The download rate is tens of times higher.
Based on the perspective of telecom operators, the joint acceleration of applications and networks enables networks and applications to be more closely integrated, enabling telecom operators to fully leverage their network advantages and gain greater advantages in market competition. At the same time, telecom operators can take advantage of the combination of applications and networks to develop more value-added services, which will promote business growth by providing faster download services, high-definition video services, and more flexible packages.
Based on the Internet content provider perspective, because telecom operators provide a complete solution including network access and CDN services, Internet content providers no longer have to worry about network and content distribution issues, regardless of CDN construction and maintenance, can focus on The operation of the content.
Based on the perspective of equipment and solution providers, it has developed its core technology and solved the most urgent needs of users and telecom operators. At the same time, it also enables telecom operators to take a step closer in the provision of integrated business operations and information services, expanding the market size and gaining more market share; thus driving more investment and construction needs, equipment and solution providers can obtain from them. More revenue.
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