تجزیه و تحلیل عملکرد از فن آوری های رمان برچسب نوری
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Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Optik - International Journal for Light and Electron Optics, Volume 124, Issue 23, December 2013, Pages 6363–6366
The generation, extraction, identification and regeneration of optical label are the key problems in optical label switching technology. This paper proposes two methods to generate optical packets in OLS system and compares their performance. Results show that when other conditions are equal, the scheme using dedicated wavelength technology has obviously better performance than that of the scheme without this technology.
At present, the switching in optical cross-connect (OXC) and optical add-drop multiplexer (OADM) devices is based on wavelength switching. OXC completes cross-connection from one wavelength to another through nodes, while OADM implements up and down telephone channels between master-slave networks by way of adding and dropping a wavelength. The switching in services is completed by core routers. Current core routers adopt switching mode based on electrical technology and will increase equipment costs. A large number of DWDM and OTDM high-speed optical signals are changed into low-speed optical signals and then into electrical signals in order to implement packet forwarding. There is electronic bottleneck in this method and switching rate is restricted by backplane rate and number of core routers. In order to solve the problem of electronic bottlenecks and implement all-optical switching, recently optical label switching (OLS)  technology is introduced and a lot of new ideas are proposed. OLS is the combination of IP addressing, control, optical cross connection and wavelength switching. Unlike SDM, TDM and WDM to exchange the sub-channel carrying user data, it implements routing or switching of user optical information through extracting and updating the optical label. The generation, extraction, identification and regeneration of optical label are the key problems in optical label switching technology. This paper mainly studies the generation of the label and proposes two schemes. The rest of this paper is organized as follows. In Section 2, we mainly introduce some typical OLS systems and describe their respective characteristics. Two optical label schemes are described in Section 3. In Section 4, we analyze and compare simulation results. We summarize the paper in Section 5.
نتیجه گیری انگلیسی
In OLS systems, there are many methods to generate optical packets and each has its advantages and disadvantages. This paper proposes two schemes and elaborates their principle. After analyzing simulation results, we can conclude that the scheme using dedicated wavelength technique improves system performance compared to that without dedicated wavelength technique.