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This paper studies the survivability in multicasting WDM mesh optical networks and proposes a new heuristic called segment protection with load balancing (SPLB) to address the single-link failure. Compared with the conventional algorithm, SPLB can perform better performances. Simulation results are shown to be promising.
Code division multiple access (CDMA) schemes have been considered as attractive multiple access schemes in the second-generation (2G), third-generation (3G) and future broadband wireless systems. Orthogonal codes are integral part of any broadband cellular systems. In this paper, we studied the performance of DS-CDMA signals with Walsh-Hadamard orthogonal codes, orthogonal gold codes and quadratic-residue...
This paper suggests remote injection system and explains the design of the system and means of implementation. Remote injection system means a system delivering the precise injection prescribed to the patient in the ward through input into the remote server using wired/wireless communication. The system has been planned in detail. The syringe has been designed to be linked with the Ringer's rubber...
In order to achieve higher reliability and load balancing various multipath routing protocols have been proposed in Wireless Sensor Network. Moreover, wireless sensor network typically incorporates heterogeneous applications within the same network. A sensor node may have multiple sensors i.e. light, temperature, seismic etc with different transmission characteristics. Each application has different...
In this work, the optimal value of parameter for complexity reduction of an Extended MMSE-DFE based Detection for V-BLAST system is considered. The detection, which is based on the fast sphere decoder for Phase-Shift Keying (PSK) signals in uncoded V-BLAST systems, namely PSD, generalizes the parameter beta in the extended channel matrix. It is shown that for M-ary PSK (M-PSK) signal, the PSD is always...
In this paper, this document introduces the current standard activity for Web-based metadata application, especially in ITU-T IPTV FG (Focus Group). The FG is interested in service requirements, architecture and functionality to provide IPTV service. Among various functionalities, metadata functionality and Web technology are necessary to support interactive data service. Currently, Web technology...
Multicarrier systems, such as MB-OFDM system, have shown better performance measures when system parameters (power, bits) are optimized, simultaneously, over different frequencies with respect to channel gain factor. In this paper, the parameter allocation problem in a multi-band OFDM (MB-OFDM) system for ultra-wide band is described considering UWB spectrum that is divided into bands that are 528...
In this paper, we propose a Web-based software management system (WebSMS) for providing the device-independent software execution environment to users. We classify software into three types based on the software execution mechanism - local software, streaming software and portable software. The proposed system merges heterogeneous software execution modules and provides Web-based interface. And it...
To implement the personalized software service platform (YouFree), we use the Ruby on Rails Framework. Ruby on Rails is an excellent Web application development framework, usable for developing fast and agile web applications. It offers a number of integrated technologies and increases the productivity of web application. However, there were some weak points of ActiveRecord on Rails like limitation...
Residue Number System (RNS) is non weighted system. This system is a useful tool for Digital Signal Processing (DSP) since it can support parallel, carry-free, high-speed, low power and secure arithmetic. One of the most important considerations when designing RNS systems is the choice of the moduli set. This is due to the fact that the system's speed, its dynamic range, as well as its hardware complexity...
In this paper, the proposed e-comic storage format for comic contents packages comic images with related information such as additional contents, bibliographic information, multi-language contents, user created contents based on ISO base media file format and MPEG-7 metadata. The e-comic format facilitates interchange, management, editing and presentation of comic contents. The format supplies personalized...
A hierarchical flexible macroblock ordering (FMO) scheme is proposed in this paper, which can be combined well with region of interest (ROI) based error resilient coding schemes while much fewer header bits are added than the existing FMO schemes in H.264/AVC standard. By defining a new FMO type with small modification of the syntax of H.264/AVC standard, the proposed FMO scheme can not only encode...
As the Internet becomes a way of social life, there are lots of accounts which a user has to manage. To receive the Web service, people have to register each Web site. It is the OpenID to resolve these burdensome. The OpenID provides the single sign-on service which a user can be authenticated in several Web sites by submitting the password of OpenID to authentication server only once. In this paper,...
Recently, MPEG-1, MPEG-2 and H.263 are still used in the industry, and more efficient video codecs such as MPEG-4 and H.264 are widely used. These video codecs provide better picture quality, higher coding efficiency, and more error robustness. However, it is difficult to apply these codecs to multi-channel environment such as DVR systems, because these codecs require high computational complexity...
The response to the virus or the hacking programs is divided into two kinds of means. The first one is to use the vaccine of individual clients or the personal firewalls and IDS in the endpoint of a network and the equipment for connecting an endpoint, and IPS. The other one is access restriction by the security system including firewalls, and so on. In case of security systems, it is obvious that...
In the last decade, several effective algorithms have been developed in the areas of content based video retrieval and copy detection. However, the task of video copy detection becomes more difficult when the target video sequences available are in degraded or edited format. In this paper, we propose an improved method of video signatures generation and comparison to detect the copy of query video...
For gray level images, watermarking algorithms based on image normalization and DS-CDMA have been proposed. In DS-CDMA method, a binary pseudo-random sequence is generated and embedded as a watermark. In the extracted binary pseudo-random sequence, we may see the non-zero Bit Error Rate (BER) even if the watermarked image has not been attacked. We extend this method to color images. The Hadamard kernel...
The IP multimedia subsystem (IMS) is currently expected to provide the basic architecture framework for the next generation network and consolidate both circuit-switched and packet-switched networks into on single network for all services. Specially, the IMS could very well be the best solution for most telecom operators as well as mobile operators. Also, interworking between IMS infrastructures is...
In this paper, we analyze the performance of the encoding and the modulation processes in the downlink and uplink of the EPCglobal Gen2 system through the analysis and simulation. Furthermore, the synchronization issues on time and frequency domain and the preamble architecture are evaluated. Through the simulation in the uplink, we find that the detection probability of FM0 and Miller coding approaches...
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