System for access control of unidirectional light bus network based on priority level dynamic regulation

A network access control and dynamic adjustment technology, applied in transmission systems, electromagnetic wave transmission systems, optical fiber transmission, etc., can solve the problems that cannot meet the real-time requirements of data transmission, can not make good use of optical bus resources, etc., to improve real-time performance Requirements, the effect of improving the utilization rate of the optical bus

Active Publication Date: 2010-06-02
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0005] In order to solve the problem that the unidirectional optical bus access control strategy in the prior art cannot make good use of optical bus resources and cannot meet the real-time requirements of data transmission, the present invention proposes an access control that comprehensively considers the active node rate and delay requirements system to improve the activity of the optical bus and meet the real-time requirements, so that all nodes (users) on an optical bus can meet their respective information transmission delay requirements, and at the same time achieve the purpose of improving the utilization of the optical bus

Method used

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  • System for access control of unidirectional light bus network based on priority level dynamic regulation
  • System for access control of unidirectional light bus network based on priority level dynamic regulation
  • System for access control of unidirectional light bus network based on priority level dynamic regulation

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Embodiment 1

[0043] refer to figure 1 and figure 2 , a unidirectional optical bus network access control system based on priority dynamic adjustment, comprising a unidirectional optical bus including M nodes, M≥3, and M is a natural number, the unidirectional optical bus includes a convening node, M-2 intermediate nodes and a termination node; the data flow of each node on the optical bus is a single service type. The unidirectional optical bus network access control system based on dynamic adjustment of priority also includes:

[0044] The node urgency parameter (J) calculation module is used to calculate whether the data at the node is urgent to send. Data streams arriving at each node have a service with a maximum waiting delay T i , where i represents different nodes on the optical bus, and t i Indicates the delay that has been waiting since the arrival of the first packet of the service; the node urgency parameter J = t i ...

Embodiment 2

[0084] In the present embodiment, the number of optical bus nodes M=6, other parameters are the same as in embodiment 1, evaluate the packet loss rate of the optical bus under different priority setting methods, and obtain the attached image 3 The results shown, evaluate the optical bus activity under different priority setting methods, and get the attached Figure 4 From the results shown, it can be seen that the packet loss rate is the largest and the active node rate is the smallest when the priority is fixed. When the priority setting emphasizes the delay requirement (that is, a=0.95, b=0.05), the packet loss rate is the smallest, but the active node rate is small. When the priority setting focuses on the rate of active nodes (ie, a=0.05, b=0.95), the packet loss rate is higher, and more requests are lost due to time delay. However, when the priority setting considers the delay and the active node rate at the same time (i.e. a=0.65, b=0.35), the packet loss rate is small...

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Abstract

The invention discloses a system for access control of a unidirectional light bus network based on priority level dynamic regulation. The unidirectional light bus comprises a convening node, M-2 intermediate nodes and a termination node, wherein M is no less than 3 and is a natural number, and data stream of each node on the unidirectional light bus is in a single service type. The system for theaccess control of the unidirectional light bus network based on the priority level dynamic regulation comprises a node criticality parameter computing module, a movable node duty ratio computing module, a tag value computing module and a priority level judging module; and according to the priority level judging module, when a request reaches a node on the light bus, data is sequentially transmitted according to the priority level. The invention improves liveness of the light bus, meets real-time requirements, ensures that all the nodes (users) on same light bus meets information transmission delay requirements respectively, and simultaneously achieves the purpose of improving the use ratio of the light bus.

Description

technical field [0001] The invention belongs to an access control system in the field of optical fiber communication network, and is suitable for dynamically setting priorities for nodes in an optical bus network to meet occasions where information has different delay requirements. Background technique [0002] In recent years, with the explosive growth of data communication traffic, the types of business supported by the underlying optical communication network have also undergone great changes, from mainly supporting connection-oriented voice information to supporting data information and burst Data information is the main. In recent years, the considerable progress of optical fiber transmission technology, switching technology, and optoelectronic device technology has made the transmission capacity of a single optical fiber communication channel larger and higher, and the rate is getting higher and higher. From the original single channel 2.5Gb / s to the current single Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04B10/25
Inventor 乐孜纯李声湘全必胜付明磊
Owner ZHEJIANG UNIV OF TECH
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