Optical burst switching (OBS) channel scheduling method based on optical buffer (OB)

Abstract

The invention provides an optical burst switching (OBS) channel scheduling method based on an optical buffer (OB). The method comprises the following steps: after receiving a burst control packets (BCP), if channel distribution based on the existing channel scheduling algorithm fails, inquiring whether an available OB exist, if yes, adding a buffer unit to the burst packet arriving time, and then carrying out inquiry again; and if distribution still fails, repeating the operations until the distribution is successful, or the buffer capability is exceeded; if the distribution is successful, updating a route table, bias time, buffer time, a buffer memory use condition and other information, and forwarding the BCP; and if the forwarding fails, abandoning the BCP. By utilizing the method, the advantages of the OB are effectively utilized, and the property of an OBS network is improved compared with the traditional fiber delay line (FDL) method.

Description

technical field [0001] The invention relates to a channel scheduling method of an optical burst switching network, more specifically, a channel scheduling method of an optical burst switching network based on a slow light buffer. Background technique [0002] As an excellent transmission medium with high bandwidth and low loss, optical fiber plays an important role in the physical transmission layer of communication network. With the maturity of DWDM technology and the development of optical devices and optical signal processing technology, optical fiber communication has gradually broken through the boundary of the physical layer. It can not only undertake the function of data transmission, but also have certain switching and routing capabilities. : Optical Transport Network) came into being. [0003] However, due to the explosive growth of IP-based data services and the emergence of new broadband multimedia services, it is imperative for traditional optical networks to ev...

AI Technical Summary

Problems solved by technology

Unlike the slow optical buffer, FDL increases the transmission time through the optical delay line, that is, by increasing the transmission distance; then in CR, FDL can only perform discrete buffering for burst packets, that is, a physical delay line can only Delay for a specific time, and because FDL is implemented using specific fibers, physical limitations make it generally only select one of the smaller cache units and larger cache times

And if you use FDL to cache multiple times, it will increase the complexity of the system and reduce the reliability of the system.

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