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Bidirectional asymmetric distribution method and device of frequency spectrum resources of optical network

An asymmetric technology of spectrum resources, applied in the field of optical communication, can solve problems such as waste of spectrum resources, achieve the effect of reducing service blocking rate and improving spectrum utilization

Inactive Publication Date: 2013-10-02
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The existing RSA, when a new service request arrives, ignores the forward and reverse (forward, the direction from the source node to the destination node; reverse, the direction from the destination node to the source node) bandwidth of the new service Due to the difference in demand, the same spectrum resources are allocated for the forward and reverse links of the service, which causes a certain waste of spectrum resources, and this waste of spectrum resources cannot be recovered through the optimization of the above two methods of

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  • Bidirectional asymmetric distribution method and device of frequency spectrum resources of optical network
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  • Bidirectional asymmetric distribution method and device of frequency spectrum resources of optical network

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Embodiment Construction

[0028] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] like figure 1 As shown, the two-way asymmetric allocation method of optical network spectrum resources in the present invention comprises the following steps:

[0030] A: Analyze the forward and reverse bandwidth requirements of new services;

[0031] B: According to the source node and destination node of the new service, as well as the network topology and the resource information database, the forward and reverse routing calculations are performed on the new service, and two forward and reverse service paths are obtained. In the specific implementation process, after calculating one of the forward and reverse service paths, the path can be directly applied to a...

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Abstract

The invention discloses a bidirectional asymmetric distribution method and a device of frequency spectrum resources of an optical network. The method comprises the steps of: A, analyzing forward and inverse bandwidth requirements of a new service, B, calculating forward and inverse routing of the new service, C, distributing the forward and inverse frequency spectrum resources for the new service, D, uploading forward and inverse service path information and frequency spectrum resource distribution information of the new service to a network topology and resource information database, and E, establishing a forward light path and an inverse light path. The method and the device can make full use of the frequency spectrum resources in the optical network and reduce the service blocking rate by using the difference between the forward and inverse bandwidth requirements of the new service on the premise of keeping the currently available total frequency spectrum resources unchanged.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a method and device for bidirectionally asymmetric allocation of optical network spectrum resources. Background technique [0002] In a wavelength division multiplexing (WDM) network, the parameters such as channel spacing, signal rate, and format are fixed, which directly leads to low flexibility of the network, which cannot meet the needs of large-capacity and high-speed optical transport networks. development needs. The all-optical network that supports flexible bandwidth based on Orthogonal Frequency Division Multiplexing (OFDM) technology is gradually becoming the development trend of optical networks due to its advantages of high flexibility and scalability. [0003] In the process of routing calculation and spectrum allocation in flexible bandwidth optical networks, due to the large randomness of the arrival and termination of super-large services, and when ...

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Application Information

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IPC IPC(8): H04L12/911
Inventor 李慧王金宇郭俊虎纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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