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Data transmission method for integrated mixed optical network based on burst exchange

A hybrid optical and integrated technology, applied in the field of optical network communication, can solve problems such as difficult implementation, high cost, and extremely high performance requirements of optical devices, and achieve reduced packet loss rate, high reliability, strong transmission capacity and strong adaptability Effect

Inactive Publication Date: 2009-05-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantage of this type of integrated hybrid switching technology is that each node needs to detect the optical label, as well as extract and insert the optical path, etc., and the realization of these functions requires extremely high performance of the optical device, which is not easy to implement and expensive. also too big

Method used

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  • Data transmission method for integrated mixed optical network based on burst exchange
  • Data transmission method for integrated mixed optical network based on burst exchange
  • Data transmission method for integrated mixed optical network based on burst exchange

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Embodiment 1

[0030] Embodiment 1: This embodiment takes a physical topology network composed of five nodes (A, B, C, D and E) as an example. There are four wavelengths on each optical fiber in the network, and each link is a bidirectional link , with figure 2 It is a schematic diagram of the principle of data transmission in this embodiment; the transmission method in this embodiment is:

[0031] A. Establish an overflow transmission optical path: first reserve two wavelengths from each physical link and use the classic shortest path algorithm (Dijkstra algorithm) to establish an overflow transmission (standby) optical path, one of which is used as a control channel and the other wavelength as a data channel;

[0032] B. Establish a hybrid optical switching network: the remaining wavelength resources are based on the data transfer matrix of 5 nodes T = 0 0 ...

Embodiment 2

[0046] Embodiment 2: This embodiment takes the physical topology network data transmission composed of 14 nodes as an example, image 3 It is a schematic diagram of the NSFNET-14 physical topology structure of this embodiment; eight wavelengths are arranged on each optical fiber in the network, and each link is a bidirectional link. The data transmission method of this embodiment is:

[0047] A. Establish an overflow transmission optical path: first reserve two wavelengths from each physical link and use the classic shortest path algorithm (Dijkstra algorithm) to establish an overflow transmission (standby) optical path, one of which is used as a control channel and the other wavelength as a data channel;

[0048] B. Establish a hybrid optical switching network: the remaining six wavelength resources are based on the data transfer matrix of 14 nodes To construct a virtual topology network for optical circuit and optical burst hybrid switching; according to the heuristic logi...

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Abstract

The invention pertains to a data transmission method in the optical network communication technology. The invention organically combines optical circuit switching (OCS) and optical burst switching (OBS) based on the original physical topological network, reserves wavelength in each physical link to establish an overflow transmission light path, transmits the discarded data packets of the original OBS due to booking collision into the light path to transmit continuously, accordingly resolving the problem of packet loss due to one time booking collision; most of the data packets in the network operation adopts an OCS mode transmission, and adopts an OBS mode overflow transmission light path to transmit the data packets to destination nodes when the data conveying capacity has a high a burst performance; and can switch back to the OCS mode transmission when the OCS light path is smooth, accordingly can flexibly adjust the transmission modes according to the current state of network and significantly reduce the packet loss rate. The present invention thus not only has high efficiency of OCS but also has flexibility of OBS, and has features of strong transmission capability and adaptability to burst data streams, rapid network transmission, high reliability, no additional optical devices and the like.

Description

technical field [0001] The invention belongs to the technical field of optical network communication, in particular to a method for data transmission by using an integrated optical network in a network environment where data transmission volume is highly bursty. Background technique [0002] With the development of network communication technology, there are two obvious trends in broadband communication network. On the one hand, packet services represented by IP have already occupied a dominant position; on the other hand, the underlying transport network will mainly be an optical network based on WDM (Wavelength Division Multiplexing) technology. Therefore, how to optimize the optical network design according to the characteristics of IP services has become one of the most critical issues in backbone network design. [0003] Existing basic optical network switching technologies include: optical circuit switching, namely OCS (Optical Circuit Switching), optical packet switc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L12/56H04L12/70
Inventor 王晟王叶霜徐世中许都刘竹
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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