ZTE Corporation announced its participation in the Global MSF Interoperability (GMI) 2008 event held by the MultiService Forum (MSF) to advance the development of
NGN is the current hot topic of the fixed network development,while 3G is the trend of the mobile communication in the next few years. Since the emerging all-service operators will soon have new de- mands on communica...NGN is the current hot topic of the fixed network development,while 3G is the trend of the mobile communication in the next few years. Since the emerging all-service operators will soon have new de- mands on communication network technologies,it is foreseeable that mobile and fixed NGNs converge.The article mainly analyzes the solutions to the convergence of mobile and fixed NGNs,and points out that convergence is a long-term goal.展开更多
This article introduces the Fiber-to-the-World total solution, a fixed access network solution launched by ZTE Corporation. The ZXA10-MSAN system, an important part of the solution, is presented. The ZXMSG 5200/5600 a...This article introduces the Fiber-to-the-World total solution, a fixed access network solution launched by ZTE Corporation. The ZXA10-MSAN system, an important part of the solution, is presented. The ZXMSG 5200/5600 access gateway system, the updated version of ZXA10-MSAN, is also described. Moreover, ZXPON, the passive optical network system, is mentioned. The wide application of the solution is demonstrated by three application cases in the end.展开更多
The factors, such as the network optimization or the network amelioration by fixed telecommunication network operators, the convergence of the Personal Handy-phone System (PHS) network and the Public Switched Telephon...The factors, such as the network optimization or the network amelioration by fixed telecommunication network operators, the convergence of the Personal Handy-phone System (PHS) network and the Public Switched Telephone Network (PSTN), the integration of PSTN and the Third Generation Mobile Communication (3G) Network, the broadband and multimedia based communication networks, causes the requirement for fixed network’s intelligentization. The Softswitch is a feasible approach to meet this kind of requirement. The solution to make the network comprehensively intelligent based on Softswitch is highly advantageous, which enriches communication services and promotes Fixed and Mobile Convergence (FMC).展开更多
The time accuracy of the exponentially accurate Fourier time spectral method（TSM） is examined and compared with a conventional 2nd-order backward difference formula（BDF） method for periodic unsteady flows. In part...The time accuracy of the exponentially accurate Fourier time spectral method（TSM） is examined and compared with a conventional 2nd-order backward difference formula（BDF） method for periodic unsteady flows. In particular, detailed error analysis based on numerical computations is performed on the accuracy of resolving the local pressure coefficient and global integrated force coefficients for smooth subsonic and non-smooth transonic flows with moving shock waves on a pitching airfoil. For smooth subsonic flows, the Fourier TSM method offers a significant accuracy advantage over the BDF method for the prediction of both the local pressure coefficient and integrated force coefficients. For transonic flows where the motion of the discontinuous shock wave contributes significant higherorder harmonic contents to the local pressure fluctuations,a sufficient number of modes must be included before the Fourier TSM provides an advantage over the BDF method.The Fourier TSM, however, still offers better accuracy than the BDF method for integrated force coefficients even for transonic flows. A problem of non-symmetric solutions for symmetric periodic flows due to the use of odd numbers of intervals is uncovered and analyzed. A frequency-searching method is proposed for problems where the frequency is not known a priori. The method is tested on the vortex shedding problem of the flow over a circular cylinder.展开更多
文摘ZTE Corporation announced its participation in the Global MSF Interoperability (GMI) 2008 event held by the MultiService Forum (MSF) to advance the development of
文摘NGN is the current hot topic of the fixed network development,while 3G is the trend of the mobile communication in the next few years. Since the emerging all-service operators will soon have new de- mands on communication network technologies,it is foreseeable that mobile and fixed NGNs converge.The article mainly analyzes the solutions to the convergence of mobile and fixed NGNs,and points out that convergence is a long-term goal.
文摘This article introduces the Fiber-to-the-World total solution, a fixed access network solution launched by ZTE Corporation. The ZXA10-MSAN system, an important part of the solution, is presented. The ZXMSG 5200/5600 access gateway system, the updated version of ZXA10-MSAN, is also described. Moreover, ZXPON, the passive optical network system, is mentioned. The wide application of the solution is demonstrated by three application cases in the end.
文摘The factors, such as the network optimization or the network amelioration by fixed telecommunication network operators, the convergence of the Personal Handy-phone System (PHS) network and the Public Switched Telephone Network (PSTN), the integration of PSTN and the Third Generation Mobile Communication (3G) Network, the broadband and multimedia based communication networks, causes the requirement for fixed network’s intelligentization. The Softswitch is a feasible approach to meet this kind of requirement. The solution to make the network comprehensively intelligent based on Softswitch is highly advantageous, which enriches communication services and promotes Fixed and Mobile Convergence (FMC).
基金supported by the State Scholarship Fund of the China Scholarship Council (Grant 2009629129)
文摘The time accuracy of the exponentially accurate Fourier time spectral method（TSM） is examined and compared with a conventional 2nd-order backward difference formula（BDF） method for periodic unsteady flows. In particular, detailed error analysis based on numerical computations is performed on the accuracy of resolving the local pressure coefficient and global integrated force coefficients for smooth subsonic and non-smooth transonic flows with moving shock waves on a pitching airfoil. For smooth subsonic flows, the Fourier TSM method offers a significant accuracy advantage over the BDF method for the prediction of both the local pressure coefficient and integrated force coefficients. For transonic flows where the motion of the discontinuous shock wave contributes significant higherorder harmonic contents to the local pressure fluctuations,a sufficient number of modes must be included before the Fourier TSM provides an advantage over the BDF method.The Fourier TSM, however, still offers better accuracy than the BDF method for integrated force coefficients even for transonic flows. A problem of non-symmetric solutions for symmetric periodic flows due to the use of odd numbers of intervals is uncovered and analyzed. A frequency-searching method is proposed for problems where the frequency is not known a priori. The method is tested on the vortex shedding problem of the flow over a circular cylinder.
