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A Smart Coexistence Approach on Unlicensed Bands

A license-free, frequency band technology, applied in the field of wireless communication, can solve problems such as low WiFi performance and affect WiFi user experience, and achieve the effect of maximizing throughput, fair and efficient coexistence

Active Publication Date: 2022-07-12
CHONGQING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

If the LTE service is directly operated on the unlicensed frequency band, the performance of WiFi will be reduced to an extremely low level, which will affect the experience of WiFi users

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  • A Smart Coexistence Approach on Unlicensed Bands
  • A Smart Coexistence Approach on Unlicensed Bands
  • A Smart Coexistence Approach on Unlicensed Bands

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Embodiment Construction

[0038] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039]Aiming at the coexistence problem of LTE and WiFi based on the LBT mechanism in the unlicensed frequency band (5GHz), the present invention proposes a DRL-based coexistence method of LAA-LTE and WiFi network. Compared with the traditional coexistence algorithm, the DRL-based coexistence algorithm in the present invention avoids a large amount of information exchange between the two systems, and allows the LAA small base station to analyze the traffic change of the WiFi network according to the information obtained by listening to the channel, It can flexibly adjust the access strategy to maximize its own throughput on the premise of ensuring the performance of the WiFi network.

[0040] Considering that there is one LAA small cell and multiple WiFi access points in the coexistence scenario, the network model is as follows figure 1 sh...

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Abstract

The invention relates to an intelligent coexistence method on an unlicensed frequency band, belonging to the technical field of wireless communication. The present invention includes the following steps: S1: design the action set, reward function and state set of the LAA small base station; S2: initialize the environment, the LAA small base station obtains the initial state value s t ; S3: According to the ε-greedy strategy, the LAA small base station randomly selects an action with probability ε, and selects the action a corresponding to the maximum Q value with probability (1-ε) t ;S4: execute action a t Then, the LAA small cell obtains the environmental reward value r t , and the empirical samples obtained by one interaction < s t , a t , r t , s t+1 > store in memory pool, then go to next state s t+1 ; S5: The LAA small base station feeds the empirical samples to the estimation value network in a batch manner to update the neural network weight θ and adjust the estimation method for the Q value; S6: Repeat steps S5-S7 until the optimal access strategy is obtained pi * (s).

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an intelligent coexistence method on an unlicensed frequency band. Background technique [0002] In recent years, the popularity of smart mobile devices and their various applications has led to an explosive growth in demand for mobile services, which has placed a heavy burden on current cellular networks. On the other hand, the capacity of the network is limited by the scarce and expensive licensed spectrum, in contrast, the unlicensed frequency bands have abundant spectrum resources and are not highly utilized. To increase cellular capacity, the deployment of LTE networks in unlicensed bands is considered a promising technology to support the explosive growth of mobile traffic. [0003] However, there are already mature wireless technologies in the existing unlicensed frequency bands. Therefore, when selecting the unlicensed frequency spectrum for the construction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04W24/02H04W24/06H04W28/02
CPCH04W16/14H04W24/02H04W24/06H04W28/0268Y02D30/70
Inventor 裴二荣陶凯徐成义宋珈锐黄一格
Owner CHONGQING UNIV OF POSTS & TELECOMM