With the continuous development of information era, multiple network levels of business application layer are emerging one after another, voice, video and data information into explosive growth, such as the business network transmits to communication network is more and more big, the particles is very pressing bandwidth requirements. But domestic operators existing metropolitan construction time
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The combination of optical orthogonal frequency-division multiplexing (OFDM) and fiber communication is one of the research hot topics for the past few years due to its prominent advantages. The advantages of OFDM are high spectrum efficiency, large tolerance to chromatic dispersion (CD) and polarization-mode dispersion, etc. However, if the OFDM technique is merely realized by
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The combination of optical orthogonal frequency-division multiplexing (OFDM) and fiber communication is one of the research hot topics for the past few years due to its prominent advantages. The advantages of OFDM are high spectrum efficiency, large tolerance to chromatic dispersion (CD) and polarization-mode dispersion, etc. However, if the OFDM technique is merely realized by
(Read More…)
The combination of optical orthogonal frequency-division multiplexing (OFDM) and fiber communication is one of the research hot topics for the past few years due to its prominent advantages. The advantages of OFDM are high spectrum efficiency, large tolerance to chromatic dispersion (CD) and polarization-mode dispersion, etc. However, if the OFDM technique is merely realized by
(Read More…)
With the development of full-service and 3G networks, China Mobile are beginning to construct WDM network in various cities to meet the growing bandwidth demand. WDM networks carry more and more important business, and large-particles services, security protection capacity need to be improved.Firstly,this paper analyzes the protection mechanism of a variety of current mainstream WDM
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Because of the convenience of external storage devices, CD-ROM, Floppy drive, USB devices and other external devices are widely used. It makes the allocation of resources more reasonable and the enterprises run more efficient but also bring in some security problems. Therefore, external devices monitoring is important for the intranet security.Most of the researches aboard
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With the extensive development of computer science and video technology, the digital image acquisition has been widely used in the fields of electronic communications and information processing. The video capture card, as the front-end equipment in computer video applications, assumes the responsibility of converting the analog video signals into digital video signal. Therefore, designing a
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The technology of SDH (Synchronous Digital Hierarchy) is widely applied in the company of ZaoZhuang Mobile. And it is the one of the most important parts of GSM(Global System of Mobile Communication). It provides a professional platform for the system of GSM base station and parts data function of GPRS (General Packet Radio Service).But the
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Nowadays, with the increasing speed of the Three-Net integration, the increasing number of the intelligent terminal, the various data service and the increase of the network scale, as well as the conflict between the bandwidth and the needs, which make the traditional network can’t meet the needs of the service. Consequently, the academies proposed the
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With China Telecommunications enterprise restructuring and 3 G license plate giving out, Chinese telecommunication is in motion and does business entering the displacement-rization, relaxing as well as melting and complete business times already all round, focus coming to say the industry communicating by letter this is opportunity and challenges the times existing side by side.
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