【摘 要】
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Optical buffer is one of the critical components in optical packet switching (OPS) networks and has aroused extensive concerns.However,there has no unifted method to evaluate the performances of the o
【机 构】
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Key Laboratory of Information Photonics and Optical Communications,Ministry of Education, Beijing Un
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Optical buffer is one of the critical components in optical packet switching (OPS) networks and has aroused extensive concerns.However,there has no unifted method to evaluate the performances of the optical buffer in OPS networks.In this paper,a new concept of the Optical Buffer Flexibility (OBF) is put forward,which simultaneously takes into consideration three essential restrictions of optical buffer,the maximum buffering time,the delay granularity and the packet length limitation.In addition,two major types of optical buffers,the feed-forward (FF) buffer and the feed-back (FB) buffer,are evaluated by the OBF to demonstrate the differentways the three restrictions affect their performances.Simulation results indicate that the coupled restrictions within each type prevent them from further improving the OBF.The decoupling resolution is proposed in the end of this paper to suggest possible structures which could improve the OBF.
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