Heterogeneous wireless network access selection method and system based on SDN

Abstract

The invention relates to a heterogeneous wireless network access selection method and system based on SDN, and the method comprises the steps: obtaining target observation data in an environment at each moment under a target observation time length; sequentially performing multi-attribute feature extraction, spatial feature extraction and time sequence feature extraction on the target observationdata by utilizing a preset neural network to obtain a state vector at the current moment; processing the state vector by using the initial Q network, and training a preset neural network and the initial Q network to obtain a trained preset neural network and a trained target Q network; calculating an evaluation value of each decision at the current moment by utilizing the trained preset neural network and the target Q network, selecting a target decision according to the evaluation value, and outputting and executing the target decision. According to the access selection method, any mobile device can select the optimal network for access according to the current environment condition and the state of the mobile device, so determinacy and low time delay are met, and the service experience of a user is guaranteed.

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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