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Resource reservation method, device and processor based on time spectrum continuity
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A spectrum resource and resource reservation technology, applied to devices and processors, in the field of resource reservation methods based on time-frequency spectrum continuity, can solve the problem that spectrum resources cannot be properly allocated, and achieve the effect of properly allocating spectrum resources
Active Publication Date: 2019-09-24
NANJING ZHONGXING SOFTWARE
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[0007] The present invention provides a resource reservation method, device and processor based on time-spectrum continuity, so as to at least solve the problem in the related art that spectrum resources cannot be properly allocated based on software-defined flexible optical networks
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Embodiment approach 1
[0063] Figure 7a and Figure 7b shows a time-spectrum continuum schematic, based on Figure 7a and Figure 7b , the resource reservation method provided in this embodiment includes:
[0064] When the service arrives and the path is established, it is necessary to calculate the spectrum resources on the link;
[0065] In order to better describe the occupancy of the spectrum, the concept of TSC (Time Spectrum Continuous) is introduced, and TSC is defined as: in, and The following formulas represent: where t c is the current time, is the sum of the available spectrum blocks of the link L along the time dimension and spectrum dimension respectively.
[0066] The spectrum occupancy on the link during the whole process is defined as the matrix [u l ] T×F , T represents a time unit, and F represents the number of spectrum resources on each link. in the matrix is a bit value, 1 means that the spectrum slot at time t and frequency f is free, and 0 means that the...
Embodiment approach 2
[0073] Figure 8 It is a flow chart of the method for resource reservation based on time-spectrum continuity according to the preferred embodiment 2 of the present invention, the method can be implemented by a processor, but is not limited thereto, such as Figure 8 As shown, the processing flow includes:
[0074] Specifically, after the business arrives: calculate the path between the source and sink nodes, and wait for the time window [t s ,t B ] After determining, according to the formula Map the bandwidth C to [t s ,t B ] on the N subcarriers between. N in the formula g is the number of slots protecting the bandwidth, f slot is the bandwidth occupied by the subcarrier, C is the data volume of the service, t s is the start time of the time window, t B is the cut-off time of the time window.
[0075] S801: After the business arrives, calculate the K shortest paths between the source node and the sink node as candidate backup paths with K shortest paths (same as th...
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Abstract
The invention discloses a resource reservation method, device and processor based on time spectrum continuity. Wherein, the method includes: receiving a service request signal, determining the candidate link and the spectrum resource block of the candidate link according to the request signal, selecting from the spectrum resource blocks that meet the request signal as a backupresource block, and obtaining the time of the backupresource block The spectrum continuous value TSC selects at least one resource block to be allocated corresponding to the TSC satisfying the preset condition from the spare resource blocks as the reserved resource for the service. The invention solves the problem that spectrum resources cannot be properly allocated under the software-defined flexible optical network.
Description
technical field [0001] The present invention relates to the field of optical network spectrum resource allocation, in particular to a resource reservation method, device and processor based on time spectrum continuity. Background technique [0002] With the vigorous development of Internet services, the network is faced with high-bandwidth and strong burst business requirements and challenges, and it is urgent to have more dynamic and efficient features. Spectrum flexible optical networks that support efficient spectrum utilization are emerging. In the spectrum flexible optical network, by adopting OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology, it is possible to dynamically allocate appropriate resources for end-to-end services of different granularities based on a certain strategy, thereby improving the Resource utilization and service transmission rate in the network. Compared with the traditional WDM (Wavelength...
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