Header error control schemes for coping with upstream channel noise in the HFC network     

Chen Hui-fang  Xie Lei  Qiu Pei-liang 《浙江大学学报(A卷英文版)》2001,2(1):51-55

The Hybrid Fiber-Coax (HFC) network is being paid close attention to in recent years as a bi-directional broadband access network. To achieve seamless connection with the backbone network, and Asynchronous Transfer Mode (ATM) Network Network Interface (NNI) cell format is used as the basic transmission packet unit in the HFC system. As the transmission condition of the HFC system’s upstream channel is bad, two improved header error control (HEC) schemes, i. e. the improved HEC and the cell interleaving technique, are employed to guarantee the packet integrity. Theoretical analysis of the results showed that the improved HEC and the cell interleaving technique are applicable to isolated random errors and burst errors, respectively.  相似文献   

HEADER ERROR CONTROL SCHEMES FOR COPING WITH UPSTREAM CHANNEL NOISE IN THE HFC NETWORK     

陈惠芳  谢磊  仇佩亮 《Journal of Zhejiang University. Science. B》2001,(1)

ＩＮＴＲＯＤＵＣＴＩＯＮＡＴＭｈａｓｇｒｅａｔｓｕｐｅｒｉｏｒｉｔｙｉｎｃｅｒｔａｉｎａｓｐｅｃｔｓ,ｓｕｃｈａｓｒｅｓｏｕｒｃｅａｌｌｏｃａｔｉｏｎｆｌｅｘｉｂｉｌｉｔｙ ,ｑｕａｌｉｔｙｏｆｓｅｒｖｉｃｅｇｕａｒａｎｔｅｅｉｎｇ ,ｉｎｔｅｇｒａｔｅｄｔｒａｆｆｉｃｓｕｐｐｏｒｔ ｉｎｇ ,ｅｔｃ .ＡＴＭｈａｓｂｅｅｎａｄｏｐｔｅｄｂｙＩｎｔｅｒｎａｔｉｏｎ ａｌＴｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎＵｎｉｏｎ (ＩＴＵ)ａｓｔｈｅｅｘ ｃｈａｎｇｅａｎｄｍｕｌｔｉｐｌｅｘｉｎｇｔｅｃｈｎｉｑｕｅｓｏｆｔｈ…  相似文献   

水性多彩涂料制备的初步研究     

赵玥 《唐山学院学报》2016,29(6):31-33,47

利用分光光度法分别考察了水性多彩涂料制备过程中的乳液用量、保护胶体的种类、分散剂的类型及用量、纤维素用量对色粒成粒过程中渗色性能的影响,制备得到适合工艺的组份配比。凝胶色粒稳定性的研究结果及制备涂料的性能测定结果表明,制备的水性多彩涂料体系稳定、抗渗色性能良好。  相似文献