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Multi-agent cooperative spectrum sensing and accessing method for cognitive radio

A cognitive radio and spectrum sensing technology, applied in the field of multi-agent cooperative spectrum sensing and access, can solve problems such as collisions

Pending Publication Date: 2022-01-07
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a multi-agent cooperative spectrum sensing and access method for cognitive radio, to solve the problem of how to quickly find an idle channel while avoiding collisions with other users

Method used

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  • Multi-agent cooperative spectrum sensing and accessing method for cognitive radio
  • Multi-agent cooperative spectrum sensing and accessing method for cognitive radio
  • Multi-agent cooperative spectrum sensing and accessing method for cognitive radio

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Embodiment

[0121] The specific implementation process of the above-mentioned method embodiment is described below: First, at the beginning of a time slot, all SUs take actions according to their own decisions at the same time, and each SU has one and only one chance. There are three situations in the result: If the channel is idle and successfully accessed, if the idle channel is not detected, it will collide with the PU and collide with other SUs.

[0122]After the SU chooses an action according to its own decision, it updates its own observations and obtains the corresponding rewards according to the results, and calculates the corresponding indicators according to the rewards, such as weight, credibility, etc., and counts each SU in the current SU partner set as a partner. The number of times, comprehensive several indicators, choose partners.

[0123] After determining the partner, the SU integrates the perception results of itself and its partners to form a global observation, and t...

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Abstract

The invention discloses a multi-agent cooperative spectrum sensing and accessing method for cognitive radio. The method comprises the following steps: step S101, collecting an environment parameter of each SU at the beginning of a current time frame; step S102, inputting the environmental parameters of each SU at the beginning of the current time frame into a deterministic strategy depth gradient (MADDPG) model; step S103, collecting a sensing strategy of each SU < n > output by the MADDPG model in the current time frame, wherein the sensing strategy is to select a certain channel to detect whether the channel is idle or not; step S104, fusing the sensing result of SU < n > and the sensing result of the partner into a global state S (t), and sending the global state S (t), the global action A (t), the award r (t) and the state S (t + 1) at the next moment to an experience replay buffer area of a deterministic strategy depth gradient MADDPG model; and taking the global state S (t) as the observation of the next moment, and repeating the steps until the training step number is finished. The problem of how to quickly find the idle channel and avoid collision with other users by the SU is solved.

Description

technical field [0001] The invention belongs to the technical field of Internet of Things communication, and in particular relates to a multi-agent cooperative spectrum sensing and access method for cognitive radio. Background technique [0002] With the development of wireless communication technology and the increase of wireless multimedia applications, wireless spectrum has become an increasingly tight resource. Studies have shown that the existing spectrum management and allocation strategies are one of the main reasons for the shortage of spectrum resources. The emergence of cognitive radio has created a new situation for alleviating the shortage of spectrum resources, realizing dynamic spectrum management and improving spectrum utilization. [0003] Cognitive radio, in a broad sense, means that the radio terminal has sufficient intelligence and cognitive ability to detect, analyze, learn, reason and plan the history and current conditions of the surrounding wireless en...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04B17/382
CPCH04W16/14H04B17/382
Inventor 高昂杜程圆梁微常宝成
Owner NORTHWESTERN POLYTECHNICAL UNIV