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Exploring the Design Space of Multichannel Peer-to-Peer Live Video Streaming Systems

机译:探索多通道对等实时视频流系统的设计空间

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Most of the commercial peer-to-peer (P2P) video streaming deployments support hundreds of channels and are referred to as multichannel systems. Recent research studies have proposed specific protocols to improve the streaming quality for all channels by enabling cross-channel cooperation among multiple channels. In this paper, we focus on the following fundamental problems in designing cooperating multichannel systems: 1) what are the general characteristics of existing and potential designs? and 2) under what circumstances should a particular design be used to achieve the desired streaming quality with the lowest implementation complexity? To answer the first question, we propose simple models based on linear programming and network-flow graphs for three general designs, namely Naive Bandwidth allocation Approach (NBA), Passive Channel-aware bandwidth allocation Approach (PCA), and Active Channel-aware bandwidth allocation Approach (ACA), which provide insight into understanding the key characteristics of cross-channel resource sharing. For the second question, we first develop closed-form results for two-channel systems. Then, we use extensive numerical simulations to compare the three designs for various peer population distributions, upload bandwidth distributions, and channel structures. Our analytical and simulation results show that: 1) the NBA design can rarely achieve the desired streaming quality in general cases; 2) the PCA design can achieve the same performance as the ACA design in general cases; and 3) the ACA design should be used for special applications.
机译:大多数商业对等(P2P)视频流部署支持数百个通道,被称为多通道系统。最近的研究研究提出了特定的协议,以通过实现多个通道之间的跨通道协作来提高所有通道的流传输质量。在本文中,我们在设计协作多通道系统时关注以下基本问题:1)现有和潜在设计的一般特征是什么? 2)在什么情况下应使用特定的设计以最低的实现复杂度来达到所需的流传输质量?为了回答第一个问题,我们针对三种通用设计提出了基于线性规划和网络流图的简单模型,这三种设计是朴素带宽分配方法(NBA),无源通道感知带宽分配方法(PCA)和有源通道感知带宽分配方法(ACA),可深入了解跨渠道资源共享的关键特征。对于第二个问题,我们首先为两通道系统开发闭式结果。然后,我们使用大量的数值模拟来比较这三种设计以用于各种对等人口分布,上载带宽分布和信道结构。我们的分析和模拟结果表明:1)在一般情况下,NBA设计很少能达到所需的流媒体质量; 2)在一般情况下,PCA设计可以达到与ACA设计相同的性能; 3)ACA设计应用于特殊应用。

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