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Wdm-fso network node resource sharing method and system

A WDM-FSO, 1. WDM-FSO technology, applied in the field of optical communication, can solve problems such as congestion, resource competition services, and "help" solutions that are not suitable for actual network scenarios

Active Publication Date: 2019-07-05
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This scheme can be regarded as a resource sharing scheme, but the current research only considers the remaining energy of nodes, and does not consider the impact of node movement on network services
Obviously, if figure 1 As shown, the fundamental problem brought about by the movement of nodes is the change of topology: 1. The change of link performance, such as the physical distance of the link, the probability of interruption, etc.; 2. The change of the neighbor nodes of the node, such as the original chain of some nodes The road may be interrupted, and some nodes will add neighbor nodes; this change will have an impact on the services in the current network and the routing of local nodes; at the same time, the network can support very limited traffic in the current research. When there are many or high business bursts, serious resource competition and business congestion will inevitably occur; in summary, the "help" scheme that only considers the remaining energy of nodes is obviously not suitable for actual network scenarios

Method used

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  • Wdm-fso network node resource sharing method and system
  • Wdm-fso network node resource sharing method and system
  • Wdm-fso network node resource sharing method and system

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specific Embodiment

[0057] The technical problem to be solved by a kind of WDM-FSO network node resource sharing method in the specific embodiment of the present invention is: in the mobile FSO network, due to the limited network resources (wavelength, energy), the resource exhaustion of the cluster head nodes in the network will lead to All users entering the cluster head are faced with the problem of no available resources. When a service request arrives, if the cluster head node accessed by the source node (user) has no resources available, the neighbor node needs to move to the current node and share its equipment. and wavelength resources to provide access for users. The movement of this node will cause changes in the network topology: 1. Changes in link performance, such as physical distance, interruption probability, etc.; 2. Changes in node neighbors, such as the original link of some nodes may be interrupted, some Nodes will add new neighbor nodes; these topology changes will affect the ...

specific Embodiment approach

[0106] Such as Figure 6 , in another specific embodiment of the present invention, a specific implementation manner of a WDM-FSO network node resource sharing method is shown, including the following steps:

[0107] (1) According to the graph G(V,E), establish a virtual topology G'(V',E'), and calculate the node weight NW i , according to NW, sort the nodes in ascending order and record them in the list L;

[0108] (2) Select the node V with the smallest NW i to s on the virtual topology c Move, stop moving when moving to the best position loc(x,y);

[0109] (3) for V i All nodes within communication range V j , to establish a potential link, the condition for establishing a potential link is d c (V i )i with V j There is no link between them, and the updated topology is denoted as G″;

[0110] (4) After moving the V j denoted as s c (new), for s c (new) and d c Execute the KSP algorithm, and record the obtained path set as P(f)={p 1 ,p 2 ,…,p k}

[0111] (5)...

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Abstract

The invention provides a WDM-FSO (Wavelength Division Multiplexing-Free Space Optics) network node resource sharing method and system. According to the method, through combination of a wavelength division multiplexing technology and through comprehensive consideration of indicators such as link reliability and service loads, a node resource sharing strategy based on a mobile WDM-FSO network is provided. According to the scheme provided by the invention, the mobility of network nodes is taken as the power for improving the network performance, the inter-node resource sharing is realized through the mobility of the network nodes, influences of topology changes on the existing service resulting from the mobility of the nodes is reduced, and a service blocking rate is reduced.

Description

technical field [0001] The present invention relates to the technical field of optical communication, more specifically, to a WDM-FSO network node resource sharing method and system. Background technique [0002] At present, with the development of mobile communications, wireless networks are dense and ubiquitous, so more flexible networking methods are required. Free Space Optics (FSO) technology is a large-bandwidth wireless communication technology that uses laser as a means of transmission. FSO technology does not need to lay optical fiber, only needs simple layout such as antenna installation, and can provide high-speed and high-quality services in the fastest time. WDM-FSO network can not only take advantage of the unique flexibility of FSO technology, but also combine WDM (Wavelength Division Multiplexing technology) to meet the networking needs of large bandwidth and multi-service. It has attracted much attention, but its research mainly focuses on channel analysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02H04B10/11
CPCH04B10/11H04J14/0227H04J14/0267
Inventor 张佳玮纪越峰张晶李慧
Owner BEIJING UNIV OF POSTS & TELECOMM
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