Analysis for optical packet switch with fixed wavelength converters and recirculation buffers

2006 ◽  
Author(s):  
Junjie Yang ◽  
Hao Zhang ◽  
Tong Ye ◽  
Zhengyi Shi
Keyword(s):  
Wavelength Converters ◽  
Optical Packet Switch ◽  
Packet Switch

scholarly journals Architecture and Performance Evaluation of a Novel Optical Packet Switch with Input Concentrators

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 510
Author(s):  
Hongzhen Yang ◽  
Xiuwei Mao ◽  
Zilu Fang ◽  
Wanke Chen ◽  
Ting Wang ◽  
...  
Keyword(s):  
Packet Loss ◽  
Cost Savings ◽  
Economic Cost ◽  
Packet Delay ◽  
Traffic Load ◽  
Buffer Size ◽  
Wavelength Converters ◽  
Single Output ◽  
Optical Packet Switch ◽  
Packet Switch

In this paper, we propose a novel optical packet switch (OPS) architecture with input concentrators, which employ multi-input single-output optical buffers to aggregate all the incoming traffic into a small size switching fabric. Accordingly, the physical size, the number of the needed wavelength converters, and the economic cost of the total OPS node are decreased dramatically. However, the deployment of input concentrators introduces additional packet loss and delay, except from the contention at the switch output. A Markov model is presented to study the packet loss ratio (PLR) and average packet delay given by the input concentrators. The corresponding closed form expressions are given. The model also demonstrates that the system performance can be greatly improved by increasing the buffer size when the traffic load is not larger than 0.69315. The analytical values are compared with the simulation results. All the obtained results show that the proposed model provides satisfactory approximations under different network scenarios. Moreover, the economic cost savings of the proposed OPS node at the present time and its evolution as a function of time are also discussed in detail. The proposed architecture can also be applied in a packet enhanced optical transport network (OTN).

An Optical Packet Switch with Recirculation Limited Range Wavelength Converter Groups and Recirculation Optical Buffers

2016 ◽  
Vol 37 (2) ◽  
Author(s):  
Jie Li
Keyword(s):  
Control Algorithm ◽  
Wavelength Conversion ◽  
Limited Range ◽  
Loss Probability ◽  
Wavelength Converters ◽  
Delay Lines ◽  
Wavelength Converter ◽  
Fiber Delay Lines ◽  
Optical Packet Switch ◽  
Packet Switch

AbstractThis paper focuses on performances of limited range wavelength converters (LRWCs) in resolving optical packet contentions. An optical packet switch is proposed, which uses recirculation LRWC groups and recirculation fiber delay lines (FDLs) to resolve optical packet contentions. In order to make full use of the LRWCs and the FDLs, a control algorithm is also proposed. Packet loss probability of the proposed switch versus the number of FDLs, the wavelength conversion range, and the number of LRWC groups are evaluated in detail.

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