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Novel ring network access controlling protocol

A ring network and ring network technology, applied in the network field, can solve problems such as service loss, sending port competition, and receiving port conflicts, and achieve network bandwidth utilization and network throughput improvement, increasing complexity, improving utilization and Effects on Network Throughput

Inactive Publication Date: 2010-04-14
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the conflict sources in the optical burst switching ring network include: 1) transmission wavelength conflict: if the transmission wavelength of each ring network node overlaps, the wavelength conflict needs to be considered; 2) the intermediate node and the receiving node exchange Conflict: If the intermediate node and the receiving node adopt switching mode instead of broadcasting, it is necessary to consider possible conflicts due to the limited capacity of the switching matrix; 3) Sending port competition: generally resolved by queuing for sending port resources ; 4) Receiving port conflict: When no special access control protocol is adopted in the optical burst switching ring network, conflicts will occur at the receiving end, resulting in service loss

Method used

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Examples

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Embodiment Construction

[0040] The following uses an OBS ring network with 4 nodes as an example to demonstrate the specific use of the TOKEN protocol in the OBS ring network with reference to the accompanying drawings.

[0041] Application environment: There are 4 optical burst switching ring network nodes on the ring network; each node has 2 sending ports and 2 receiving ports; each receiving port is preceded by an AOTF for tuning and receiving any wavelength; there are 4×2 sending ports, each port is equipped with a different DWDM wavelength, a total of 8 different DWDM wavelengths. Ring network structure and node structure such as image 3 , Figure 4 shown. The ring network here is a one-way ring, the distance between adjacent nodes is 10km, and the transmission delay of data transmission between adjacent nodes is 50us.

[0042] Assume that the current node C has just used TOKEN-D-2 to send a data burst to node D, and immediately fills in the "last data burst duration" field of the TOKEN, and...

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Abstract

This invention relates to a new type of access control protocol, which can be used in the ring networks applying the light burst technology, in which, the nodes in a ring network control the shared network bandwidth and interfaces effectively to avoid the appearance of burst conflict to increase the usability and network performance light burst switch network resource.

Description

technical field [0001] The present invention belongs to the category of network technology, and is a new type of access control protocol, which can be applied to ring networks, especially ring networks using optical burst switching technology. Effective control avoids the emergence of burst conflicts, and improves resource utilization and network performance of the optical burst switching network. Background technique [0002] Optical burst switching technology has become a research hotspot because of its improved utilization of network bandwidth resources and its ease of implementation compared to optical packet switching, and the use of optical burst switching technology to construct a ring network suitable for application in the metropolitan environment is an emerging topic. In the research of optical burst switching, how to reduce or avoid burst conflicts and how to resolve burst conflicts after occurrence has always been the focus of research. Generally speaking, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/28H04L12/433
Inventor 纪越峰高鹏高泽华
Owner BEIJING UNIV OF POSTS & TELECOMM
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