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A kind of unlicensed spectrum intelligent access method

An unlicensed spectrum, intelligent access technology, applied in the direction of reducing energy consumption, transmission monitoring, advanced technology, etc., can solve problems such as coexisting network performance constraints, improve spectrum utilization, ensure service quality, and maximize total throughput Effect

Active Publication Date: 2022-07-08
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Considering that most of the existing schemes adopt conservative random access mechanism or fixed periodic access mode, they cannot flexibly make adaptive adjustments according to the time-varying wireless environment, which inevitably limits the performance of the coexistence network

Method used

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  • A kind of unlicensed spectrum intelligent access method
  • A kind of unlicensed spectrum intelligent access method
  • A kind of unlicensed spectrum intelligent access method

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Embodiment Construction

[0051] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0052] Aiming at the fair coexistence problem in an unlicensed spectrum (5GHz) LTE / WiFi coexistence network, the present invention proposes an intelligent spectrum access method based on deep reinforcement learning. Compared with the traditional coexistence mechanism, the present invention enables the LTE small base station to adaptively adjust the access timing and transmission duration, and the process is as follows: figure 1 shown. The LTE small base station first selects the access action a through the ε-greedy strategy t , then perform actions on the environment and get feedback r t and s t+1 , and then use past experience to learn and improve its own strategy. After many training iterations, an optimal access strategy is finally learned. The above process is consistent with the interaction process between the agent and the environ...

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Abstract

The invention relates to an unlicensed spectrum intelligent access method, belonging to the field of wireless communication. The method includes the following steps: S1: initialize environment parameters and agent parameters; S2: initialize environment state s t =s 1 and experience replay mechanism RB; S3: Generate action a according to the ε-greedy strategy t =π(s t ); S4: in the subsequent β E Execute action a in execution cycles t , receive environmental feedback r t and update the state to s t+1 ;S5: will transfer sample e t =(s t , a t , r t , s t+1 ) is stored in the experience replay mechanism RB; S6: randomly select H transfer samples from the experience replay mechanism RB to update the Q-network; S7: the training is terminated, and the optimal access strategy is output. In the present invention, the LTE small base station, as the main body of learning and decision-making, can learn the optimal access action strategy according to the number of different WiFi access points in the network, so as to maximize the total throughput and fairness of the coexisting network. .

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to an unlicensed spectrum intelligent access method. Background technique [0002] Wireless communications have witnessed an unprecedented increase in the number of mobile terminals and the traffic demands of various multimedia applications. Global mobile data traffic is expected to grow sevenfold between 2017 and 2024. The huge gap between current network capacity and future traffic demands has prompted academia and industry to seek more advanced techniques to increase network capacity. Given the abundance of unlicensed spectrum available worldwide, mobile operators are increasingly considering unlicensed spectrum as a complementary tool to expand network capacity. [0003] Different from licensed spectrum, wireless communication systems using different types of radio access technologies (Radio Access Technology, RAT) can coexist in unlicensed spectrum. When there is a lack o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04B17/309H04B17/382
CPCH04W24/02H04B17/309H04B17/382Y02D30/70
Inventor 裴二荣黄一格宋珈锐陶凯徐成义
Owner CHONGQING UNIV OF POSTS & TELECOMM
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