Stack type whole optical caching device

Abstract

The present invention relates to a stack type fully optical buffer, and belongs to the field of fully optical packet switching. The buffer is characterized by consisting of a plurality of cascading light guide units; the downlink output end of the light guide unit of each level is orderly connected with the downlink input end of lower level, so as to form a downlink channel; the uplink input end of each level is orderly connected with the uplink input end of higher level, so as to form an uplink channel. The data packet which is transmitted into the light guide unit of each level is controlled by a control end for uplink transmission or downlink transmission. The i-level downlink output end is connected with the control end of the level of i plus 2, so as to prevent the levels of i and i plus 2 from simultaneously transmitting the data to the level of i plus 1. When two data packets arrive to the buffer simultaneously, the data packet of higher priority is directly transmitted outwards, and the data packet of lower priority is stored in the buffer; and the storage depth of the original data packet in the buffer is deepened by one level. The fully optical buffer has the first-in but last-out, and last-in but first-out characteristics, the capability of simultaneously processing two data packets, and the advantages of easy expansion of the storage capacity, no requirement for additional control signals, and so on.

Description

technical field [0001] The invention belongs to the technical field of information optoelectronics, in particular to an all-optical buffer in an all-optical packet switching network. Background technique [0002] In recent years, optical communication networks have developed rapidly. With the sharp increase in bandwidth requirements, high speed, flexibility and good scalability have increasingly become the development direction of next-generation optical networks. Modern optical networks are no longer just satisfied with the use of optical fibers to transmit signals. Some tasks that were originally completed in the electrical domain after photoelectric conversion, such as switching, routing, storage, forwarding, etc., are gradually being introduced into the optical domain, using all-optical signals The processing method implementation. Among them, the all-optical packet switching technology is considered to be one of the most potential all-optical network solutions because ...

AI Technical Summary

Problems solved by technology

Both of these two schemes have achieved read-write controllable, and have the function of storage and forwarding, but the disadvantage is that for each data packet, an additional control light is required, and the length of the control light must be equal to the data packet, which increases the system Complexity

However, the currently reported circular feedback all-optical buffers have only one level of storage depth, can only store one data packet, and the capacity cannot be expanded.

Moreover, most of them require additional special control signals, and cannot intelligently control the cache time of data packets according to the network data flow, and the flexibility and scalability are limited.

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