Decreasing call blocking probability of Broadband TV services by a channel access control scheme
Decreasing call blocking probability of Broadband TV services by a channel access control scheme
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DOI：
10.1109/icumt.2010.5676667
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
Junyu Lai;B. Wolfinger;Stephan Heckmüller
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文献类型：
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作者：
Junyu Lai;B. Wolfinger;Stephan Heckmüller
最近世界各地电信公司提供的宽带电视（BTV）等新业务的出现，最好地说明了当前网络融合的趋势。一个非常相关的研究课题是提高体验质量（QoE）。用户呼叫阻塞概率（CBP）是BTV QoE的重要指标之一，本文主要研究如何降低用户呼叫阻塞概率。首先，我们分析了目前典型的北京电视网络架构。然后，提出了一种基于状态向量的仿真模型来评估CBP（单链路）。在此基础上，提出了一种基于类的频道观看概率分布模型，并在此基础上提出了一种通用的电视频道访问控制（TCAC）方案，以降低CBP。该方案灵活，可适用于多种不同的场景。最后，通过实例分析，验证了该TCAC方案通过降低单链路上的CBP来提高BTV QoE的潜力。
The current trend of network convergence has been best exemplified by the recent emergence of new services such as Broadband TV (BTV) offered by Telcos around the world. A very relevant research topic is to improve the quality of experience (QoE). This paper focuses on decreasing the user call blocking probability (CBP), which is one of the most important BTV QoE metrics. At first, we analyze a currently typical BTV network architecture. And then, a state-vector-based simulation model is proposed to evaluate the CBP (on a single link). After that, we present a class-based distribution model of channel watching probabilities, and based on this distribution model, we elaborate a general TV channel access control (TCAC) scheme in order to reduce the CBP. This scheme is flexible and can be applicable in many different scenarios. Finally, a case study is carried out, and it demonstrates the potential of this TCAC scheme to improve the BTV QoE by decreasing the CBP on a single link.