tailieunhanh - Optical Networks: A Practical Perspective - Part 70

Optical Networks: A Practical Perspective - Part 70. This book describes a revolution within a revolution, the opening up of the capacity of the now-familiar optical fiber to carry more messages, handle a wider variety of transmission types, and provide improved reliabilities and ease of use. In many places where fiber has been installed simply as a better form of copper, even the gigabit capacities that result have not proved adequate to keep up with the demand. The inborn human voracity for more and more bandwidth, plus the growing realization that there are other flexibilities to be had by imaginative use of the fiber, have led people. | 660 Photonic Packet Switching and find an expression for the control inputs ci . q. Assume that if c 1 switch i is set in the bar state and if c - 0 switch i is set in the cross state. Consider the fiber loop mirror shown in Figure and show that the nonlinear element should introduce a phase shift of it between the clockwise and counterclockwise signals in order for all the energy entering the directional coupler from arm A to be transferred to arm B. We have seen that many photonic packet-switching proposals use a lower-rate header compared to the payload. Suppose the maximum header bit rate is 1 Gb s and headers are 10 bytes long. The payload data rate is 100 Gb s. a We would like the duration of the payload to be 90 of the overall packet duration including header and payload . What size does the payload need to be b If we wanted the maximum payload size to be 1000 bytes and maintain the same efficiency at what rate would the header have to be transmitted c Suppose we need a minimum of 1 s to process the header. This time is accounted for as an additional guard band in the overall packet in addition to the header and payload. Again if we want to maintain the payload at 90 of the overall packet and the header at 10 bytes at 1 Gb s what size does the payload need to be _ References Ams83 S. Amstutz. Burst switching an introduction. IEEE Communications Magazine 21 36-42 Nov. 1983. AS92 A. S. Acampora and S. I. A. Shah. Multihop lightwave networks A comparison of store-and-forward and hot-potato routing. IEEE Transactions on Communications 40 6 1082-1090 June 1992. Bar64 P. Baran. On distributed communications networks. IEEE Transactions on Communications pages 1-9 March 1964. Bar96 R. A. Barry et al. All-optical network consortium ultrafast TDM networks. IEEE JSAC JLT Special Issue on Optical Networks 14 5 999-1013 June 1996. BCM 92 D. J. Blumenthal K. Y. Chen J. Ma R. J. Feuerstein and J. R. Sauer. Demonstration of a deflection routing 2x2 photonic .