The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Recently traffic identification based on Machine Learning (ML) techniques has attracted a great deal of interest. Two challenging issues for these methods are how to deal with encrypted flows and cope with the rapid growing number of new application types correctly and early. We propose a hybrid traffic identification method and a novel unsupervised clustering algorithm, On-Line Density Based Spatial...
This paper presents an anti-geometric attacks algorithm of color image watermarking based on scale-invariant feature transformation. Firstly, detecting SIFT feature points in the red component of true color image and filter out the feature points information; Then three level wavelet transform is performed on the blue and green component of the color image and extract the low-frequency component coefficient...
Traffic classifications based on Statistics methods and Machine Learning techniques have attracted a great deal of interest. One challenging issue is that most of supervised algorithms need traffic application information and training data sets to generate classification model offline, which is infeasible to cope with the fast growing number of new applications and online traffic classifications....
Recently traffic classifications based on statistics methods and machine learning techniques have attracted a great deal of interest. Some challenging issues for these methods are that most of them need prior analysis to detect traffic applications and training data sets to generate classification model offline; some require a high amount computation and memory resource. These are infeasible to cope...
A scheme on orthogonal frequency division multiple access (OFDMA) system with dynamic bandwidth allocation is investigated in passive optical networks (PONs). The system supports various applications and enables dynamic bandwidth allocation among these applications. Digital signal processing (DSP) unit as an important component is utilized for flexibility in PON. The simulation results show that the...
We investigate passive optical network (PON) based on optical orthogonal frequency division multiplexing (OFDM) transmission as a solution for next-generation optical access network. Compared with other PONs, the system improves the bandwidth efficiency and increases the flexibility to allocate resource dynamically among various services. We present simulation results on the bit error rate (BER) performance...
The FPGA-based high throughput 128 bits AES cipher processor is proposed in this paper. We present an equivalent pipelined AES architecture working on CTR mode to provide the highest throughput up to date through inserting some registers in appropriate points making the delay shortest, when implementing the byte transformation in one clock period. The equivalent pipelined architecture does not change...
TD-SCDMA and WiMax systems will coexist in a specific band because of the sprectrum planning and operating principle. It will result in the coexisting interference between these two systems. We analyze the coexisting interference between TD-SCDMA and WiMax systems by system simulation. And give the conclusion about the interference from TD-SCDMA system to WiMax system, as well as the interference...
We propose optical code division multiple access (OCDMA) over wavelength division multiplexing (WDM) in passive optical network (PON) based on Chebyshev-map chaotic spread spectrum. The system avoids the limitation of available wavelength channels and optical codes to the capacity, supports more subscribers by providing the same code at different wavelength channels. The scheme on Chebyshev-map chaotic...
We propose a novel scheme of orthogonal wavelength-division-multiplexing (WDM) using superstructure fiber Bragg gratings (SSFBGs) as a square pulse shaper in passive optical networks (PONs). The system supports large numbers of subscribers by the orthogonal interleaving of the sinc-shaped spectrum from each channel and expends the capacity.
We propose a novel scheme of orthogonal wavelength-division-multiplexing (WDM) using superstructure fiber Bragg gratings (SSFBGs) as a square pulse shaper in passive optical networks (PONs). The system supports large numbers of subscribers by the orthogonal interleaving of the sinc-shaped spectrum from each channel and expends the capacity.
At present, more and more scholars paid attention to accuracy rate of Internet traffic identification, but not on construction model time, test time, CPU utilization, memory consumption, and concision of models description between different algorithms. However, these indicators played a decisive role in performance of practical internet traffic identification system. So, we collected traffic from...
The current network traffic identification technology, based on the port of transport layer and the label of application layer protocol of network traffic, has shown some shortcomings which are difficult to be overcome. The author proposed that the C4.5 algorithm could be used in transport layer network traffic identification technologies with engineering practice to solve the above problems. The...
A novel optical-code-division-multiplexing-access (OCDMA) wavelength-division-multiplexed (WDM) passive-optical-network (PON) scheme using two-level chaotic Logistic-map as spread spectrum sequence is investigated to extend the capacity of optical access network for the first time.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.