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Scalable video stream multicast method based on QoS intelligent perception in SDN environment

A technology of intelligent perception and video streaming, which is applied in branch offices providing special services, data exchange details, digital transmission systems, etc., and can solve problems such as failure to consider user network quality service experience.

Active Publication Date: 2018-12-14
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, in the path transmission schemes for video streams under the surveyed SDN environment, most of them only consider the design of end-to-end routing algorithms under the limitation of link bandwidth, without considering the user's network quality service experience

Method used

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  • Scalable video stream multicast method based on QoS intelligent perception in SDN environment
  • Scalable video stream multicast method based on QoS intelligent perception in SDN environment
  • Scalable video stream multicast method based on QoS intelligent perception in SDN environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0104] Experimental environment: The SDN controller in this example uses Floodlight1.2, the network topology is built using the network emulator Mininet2.2, and the Iperf contracting tool is used to simulate the SVC layered video stream

[0105] Network topology: such as Figure 9 As shown, one server (server), five clients (d 1 -d 5 ) and eleven switches (switch), each link is marked next to its bandwidth capacity and propagation delay, the units are megabits per second (Mbps) and milliseconds (ms).

[0106] Experimental parameters: The server (server) encodes the video into a base layer and an enhancement layer, and the bit rate of each layer is 1Mbps. The maximum allowable delay and delay jitter are set to 90ms and 30ms respectively.

[0107] Implementation process:

[0108] 1. At time t=0s, d 5 request the base layer video stream from the server, d 1 , d 2 , d 4 Request both base layer and enhancement layer video streams. The multicast routing module in Floodlight...

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Abstract

The invention discloses a scalable video stream multicast method based on QoS intelligent perception under SDN environment, which comprises: firstly decomposing a video request into a plurality of sub-requests, then searching a path conforming to network quality service requirements from a client to a server for each sub-request, and finally constructing a base layer multicast tree; and then constructing the enhancement layer multicast tree from the bottom up. When constructing the enhancement layer multicast tree, the current enhancement layer multicast tree is obtained from the upper layer multicast tree through the pruning operation, and then the congested links are rerouted in turn. Through such a bottom-up process, the invention can effectively reduce the number of links occupied by the multicast session and the number of group tables distributed, thereby improving the scalability of the video multicast session. At the same time, the invention adopts the method of multi-path routing to transmit the layered video stream, thereby effectively utilizing the link bandwidth resources in the network and improving the network quality service experience of the user.

Description

technical field [0001] The invention belongs to video multicast technology, and in particular relates to a scalable video stream multicast method based on QoS intelligent perception in an SDN environment. Background technique [0002] Over the past few decades, multimedia streaming applications such as video conferencing, online video games, and high-definition IP TV have become more and more popular on the Internet, and network traffic has grown exponentially. At the same time, due to the rise of mobile networks, clients of video streaming are becoming more and more heterogeneous, that is, different clients may have different equipment capacity, access bandwidth and network quality of service (Quality of Service) requirements. In addition, in the application scenario of real-time video streaming, the video server in the traditional IP network transmits the same video stream to multiple clients through multiple unicast connections. However, this solution will generate redun...

Claims

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Application Information

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IPC IPC(8): H04N21/6405H04L12/801H04L12/761H04L12/751H04L12/727H04L12/725H04L12/721H04L12/18H04L45/02H04L45/121H04L45/16
CPCH04L12/185H04L45/02H04L45/121H04L45/123H04L45/16H04L45/302H04L47/10H04N21/6405
Inventor 仲红吴飞崔杰许艳应作斌田苗苗
Owner ANHUI UNIVERSITY
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