A reliability-based online mapping method for 5G network slices
A network slicing and mapping method technology, applied in the field of reliability-based 5G network slice online mapping, can solve the problems of not considering reliability, not considering the influence of the RRU spectrum utilization efficiency of access network network slice resource mapping, etc. The effect of ensuring network reliability and improving resource utilization
Active Publication Date: 2022-02-22
CHONGQING UNIV OF POSTS & TELECOMM
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[0005] On the one hand, the existing inventions involve resource allocation in core network mapping, and do not consider the impact of access network slice resource mapping on RRU spectrum utilization efficiency; redundant protection mechanisms are mainly used for reliable mapping. Although this type of method is simple and effective, However, additional resource overhead is required; on the other hand, in the virtualization environment of network slicing, business diversity puts forward different requirements for the reliability of slices. The previous research did not take into account the different requirements for reliability.
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[0052] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0053] figure 1 is a schematic diagram of a scene example where the embodiment of the present invention can be applied. Slices of different line types represent different business types, λ i , i=1, 2 represents the failure rate of the current link, assuming λ 1 >λ 2 Under the condition of , the network slices shown in the figure (linked by solid arrows) all select the most reliable link mapping considering the resource constraints of nodes and links. However, the three slice streams share the spectrum resources of RRU3, and the load of node 2 is too heavy, which may cause the sliced business to be processed at the node, but due to the limitation of RRU spectrum resources, it cannot be transmitted, resulting in network congestion and increased network slicing delay. As a result, the reliability of the network slicing is reduced. Using ...
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The invention relates to a reliability-based online mapping method for 5G network slices, belonging to the technical field of mobile communications. The method is as follows: Aiming at the dynamic mapping and lightweight reliable mapping of 5G network slices, a multi-objective resource allocation model based on reliability constraints is established; time is discretized into a series of continuous time windows, and the time window is determined according to the slice life cycle. Different slice request mapping priorities; establish a Lyapunov optimization model at the processing node to determine the node mapping priority that meets the slice resource requirements; according to the reliability of the underlying link, find the most reliable communication link mapping that meets the slice link resource constraints . The present invention comprehensively considers the stability of the network and the failure rate of the physical link when realizing the network slice mapping, thereby improving the utilization rate of resources while ensuring the reliability of the network.
Description
technical field [0001] The invention belongs to the technical field of mobile communication, and relates to an online mapping method for 5G network slices based on reliability. Background technique [0002] In the 5G-CRAN network virtualization and wireless cloud environment, the decoupling of resources and applications is realized, and all processing resources of functional abstraction can belong to a complete logical resource pool. Resource allocation is no longer carried out in a separate base station like traditional networks, but based on NFV architecture, resource allocation is carried out at the "pool" level, which can maximize the multiplexing and sharing of processing resources (such as: tidal effect) , reduce the cost of the whole system, and bring the advantages of flexible deployment of functions, so as to realize the flexible distribution of functions from business to wireless end-to-end. [0003] End-to-end network slicing (Network Slicing) provides multiple l...
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IPC IPC(8): H04W28/16H04L41/0895
CPCH04L41/0893H04W28/16
Inventor 唐伦赵国繁周钰杨友超杨恒陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM