Nine unique skills of Huawei cloud low latency Technology

Nine unique skills of low delay technology

1. Transmission technology , End to end low latency solution provided by end-to-end management and edge cloud collaboration

End pipe side cloud collaboration , Provide end-to-end acceleration solutions for developers :

• Multipath access : End side WIFI、LTE Work at the same time , The cloud side deployment agent network transmission is transparent to application developers , Simplify development complexity ;

• Wireless acceleration : Unified support for China Mobile 、 Unicom 、 Telecom users across the country have accelerated , Unified support 5G section 、 MEC sinking 、4/5G QoS Speed up

Reconstruct the network on the basis of public Internet :

• Self built backbone network : Global coverage of nodes 、 Regional dedicated line interworking 、 Operator access network 1 - Hop access ;

• Control surface : Advance prediction and real-time update of routing based on global network quality status

• Data side : Segment retransmission and redundant transmission , Multi path parallel transmission

2. Innovative RTC End - Network collaboration capability ,  Wireless network congestion scenarios reduce the number of catons 22%

Through the mobile terminal App On , Call wireless network acceleration capability on demand , Reduce Caton 22%

3. Multipath access ,Wifi And 4G/5G Communication capability sharing , The terminal accesses the edge node faster

The main principle is ：

• Redundancy mode is selected for audio , The two links complement each other ; Dynamic active / standby mode is selected for video , Automatically select high-quality links ;

• Turn on WIFI+LTE or WIFI+ 5G Dual channel mode , In the weak network environment ( Such as airport 、 Shopping malls and other scenes with poor network signals ) The delay can be improved up to 61%.

4. Weak network countermeasure algorithm , Adaptive complex networks , Fast perception of network status , Avoid the avalanche effect caused by server overload , So as to ensure the low delay experience of weak network

Huawei patented anti weak network packet loss technology , In the weak network environment, we can adaptively find the best match point between delay and smoothness

5.AI Prediction and intelligent routing , Break through the challenge of cross domain communication routing

• Panoramic survey : Network quality detection of each segment and level of end pipe edge cloud 、 fine-grained & Low overhead measurement technology

• Regular prediction : Utilize the global network periodically in time and region 、 The law of one change after another , Avoid local network congestion , Provide high-quality links , Maximize network performance

• Cross domain control & Dispatch : be based on AI Rule prediction for intelligent routing scheduling 、 Solve the problem that there are circuitous paths between the autonomous domains of operators 、 High packet loss rate

6. Ultimate coding , Reduce the media bit rate as much as possible on the premise of ensuring user perception , Under the same network conditions, the data transmission time decreases

Time domain layered coding , Adaptive network conditions , Reduce the delay caused by retransmission

ROl Perceptual encoding , Intelligent detection of areas of interest and moving parts of the human eye , Improve quality ; Other parts adopt high compression ratio , Reduce the overall bit rate .

Adjust frame reference , Do reference decoding based on the received frame .

7. Source channel co coding , Prediction of bandwidth based on reinforcement learning , Realize frame level detection and code control

8. Multi party packet forwarding technology , It has the ability of segmented anti packet loss , Use a set of architecture to take into account two-party and multi-party transmission

9. Full link in segmented transmission network scenario QoS Collaborative coding

summary

This article mainly starts from the media network business objectives , Then learn more about SparkRTC Global network architecture , Finally, the low delay technology is analyzed , The nine unique skills of Huawei in low delay technology are introduced in detail . Finally, the realization of real-time audio and video technology is the realization of a network , It mainly focuses on how to fuse based on video stream , Support the seamless flow of all scenario businesses , Break through technical limitations , Expand on demand , And through this article , You also have a certain in-depth understanding of Huawei's implementation in this regard .

This article participates in Huawei cloud community 【 Content co creation 】 Activity number 17 period .

https://bbs.huaweicloud.com/blogs/358780

Task five

[ Analysis of low delay technology ： Global low delay network architecture for real-time audio and video ](