An SDN-based heterogeneous wireless network access selection method and system

Abstract

The invention relates to an SDN-based heterogeneous wireless network access selection method and system. The method includes the steps of: acquiring target observation data in each time environment under the target observation time length; using a preset neural network to observe the target Multi-attribute feature extraction, spatial feature extraction and time series feature extraction are performed on the data in turn to obtain the state vector at the current moment; the state vector is processed using the initial Q network, and the preset neural network and the initial Q network are trained to obtain the trained Preset neural network and target Q network; use the trained preset neural network and target Q network to calculate the evaluation value of each decision at the current moment, and select the target decision based on the evaluation value, output and execute the target decision. The access selection method can enable any mobile device to select the optimal network for access according to the current environmental conditions and its own state, so as to meet deterministic low delay and ensure user service experience.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an SDN-based heterogeneous wireless network access selection method and system. Background technique [0002] Industrial Internet is a typical application scenario that promotes the development of future networks, and is one of the key driving forces for future Internet development. Whether it is the 5G era or the post-5G era, deterministic and low latency is the key technical requirement. The current Internet based on the TCP / IP protocol stack of the IETF (Internet Engineering Task Force, Internet Engineering Task Force) provides "best effort" network transmission services and limited QoS (Quality of Service, quality of service) guarantees. However, in future industrial connections, it is necessary to provide not only definite and timely transmission services (in time, short delay), but also definite and punctual transmission services (on time, small jitter). ...

AI Technical Summary

Problems solved by technology

[0004] However, since this algorithm only considers the terminal's RSSI factor as the state of the terminal in the network, and a single RSSI index cannot accurately reflect the actual situation in the network, so under this access selection algorithm, the terminal cannot be Satisfies deterministic low latency, and the traditional DQN algorithm has an overestimation problem, which makes it impossible to obtain a stable and effective strategy

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