数字电视的中间件是在业务应用程序和操作系统之间嵌入的一个中间解释层软件,它规定一组支持数字电视应用功能的API(Application Program Interface:应用程序接口),使业务应用程序与接收机硬件平台的具体构造无关,使其具有与硬件平台无...数字电视的中间件是在业务应用程序和操作系统之间嵌入的一个中间解释层软件,它规定一组支持数字电视应用功能的API(Application Program Interface:应用程序接口),使业务应用程序与接收机硬件平台的具体构造无关,使其具有与硬件平台无关和模块标准化的特征。目前,数字电视中间件系统传输协议模型的发展,正在逐步向统一平台和统一业务支持的方向过渡。展开更多
To provide an optimal alternative to traditional Transmission Control Protocol(TCP)-based transport technologies,Aspera's Fast and Secure Protocol(FASP)is proposed as an innovative bulky data transport technology....To provide an optimal alternative to traditional Transmission Control Protocol(TCP)-based transport technologies,Aspera's Fast and Secure Protocol(FASP)is proposed as an innovative bulky data transport technology.To accurately analyse the reliability and rapidness of FASP,an automated formal technique - probabilistic model checking - is used for formally analysing FASP in this paper.First,FASP's transmission process is decomposed into three modules:the Sender,the Receiver and the transmission Channel.Each module is then modelled as a Continuous-Time Markov Chain(CTMC).Second,the reward structure for CTMC is introduced so that the reliability and rapidness can be specified with the Continuous-time Stochastic Logic(CSL).Finally,the probabilistic model checker,PRISM is used for analysing the impact of different parameters on the reliability and rapidness of FASP.The probability that the Sender finishes sending data and the Receiver successfully receives data is always 1,which indicates that FASP can transport data reliably.The result that FASP takes approximately 10 s to complete transferring the file of 1 G irrespective of the network configuration shows that FASP can transport data very quickly.Further,by the comparison of throughput between FASP and TCP under various latency and packet loss conditions,FASP's throughput is shown to be perfectly independent of network delays and robust to extreme packet loss.展开更多
文摘数字电视的中间件是在业务应用程序和操作系统之间嵌入的一个中间解释层软件,它规定一组支持数字电视应用功能的API(Application Program Interface:应用程序接口),使业务应用程序与接收机硬件平台的具体构造无关,使其具有与硬件平台无关和模块标准化的特征。目前,数字电视中间件系统传输协议模型的发展,正在逐步向统一平台和统一业务支持的方向过渡。
基金supported by the National Natural Science Foundation of China under Grants No. 60773049,No. 61003288,No.61111130184the Ph.D. Programs Foundation of Ministry of Education of China under Grant No. 20093227110005the Natural Science Foundation of Jiangsu Province under Grant No.BK2010192
文摘To provide an optimal alternative to traditional Transmission Control Protocol(TCP)-based transport technologies,Aspera's Fast and Secure Protocol(FASP)is proposed as an innovative bulky data transport technology.To accurately analyse the reliability and rapidness of FASP,an automated formal technique - probabilistic model checking - is used for formally analysing FASP in this paper.First,FASP's transmission process is decomposed into three modules:the Sender,the Receiver and the transmission Channel.Each module is then modelled as a Continuous-Time Markov Chain(CTMC).Second,the reward structure for CTMC is introduced so that the reliability and rapidness can be specified with the Continuous-time Stochastic Logic(CSL).Finally,the probabilistic model checker,PRISM is used for analysing the impact of different parameters on the reliability and rapidness of FASP.The probability that the Sender finishes sending data and the Receiver successfully receives data is always 1,which indicates that FASP can transport data reliably.The result that FASP takes approximately 10 s to complete transferring the file of 1 G irrespective of the network configuration shows that FASP can transport data very quickly.Further,by the comparison of throughput between FASP and TCP under various latency and packet loss conditions,FASP's throughput is shown to be perfectly independent of network delays and robust to extreme packet loss.
