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Internet of Vehicles system performance optimization method based on Nakagami-m fading

A system performance and optimization method technology, which is applied in the direction of specific environment-based services, transmission systems, digital transmission systems, etc., can solve problems such as the performance research of the unconnected vehicle network system, and achieve the effect of reducing complexity and improving system performance

Active Publication Date: 2020-08-18
江苏第二师范学院
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is no relevant research on the performance of the IoV system based on Nakagami-m fading in the existing literature

Method used

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  • Internet of Vehicles system performance optimization method based on Nakagami-m fading
  • Internet of Vehicles system performance optimization method based on Nakagami-m fading
  • Internet of Vehicles system performance optimization method based on Nakagami-m fading

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Experimental program
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Embodiment Construction

[0035] For the convenience of expression, the present invention defines an integral function:

[0036] Its integral result is

[0037]

[0038] The method is as follows:

[0039] From the link status information of the IoV system, the expressions of the signal-to-interference-noise ratio at the receiving end of the V2V link and the V2I link are obtained as follows:

[0040]

[0041] and

[0042]

[0043] where P T is the transmit power of the useful signal; P 1 is the transmitting power of the interference signal; L 1U is the path loss of the 1-U link; L TU is the path loss of the T-U link; N 0 is the noise power; h TR 、h 1R 、h 1U 、h TU is the channel coefficient, subject to Nakagami-m fading.

[0044] Calculation¶ R with gamma U The probability density function of

[0045]

[0046] and

[0047]

[0048] The definition of outage probability is:

[0049]

[0050] where γ kq is the received signal-to-interference-noise ratio; γ th for a given ...

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Abstract

The invention discloses an Internet of Vehicles system performance optimization method based on Nakagami-m fading. The method comprises the following steps: in a time slot when a group of V2V and V2Iusers complete one-time communication, acquiring sending power and link state information of respective links, and establishing a link outage probability and traversal reachable rate compact upper bound model according to the acquired information; assuming that the total transmission power of the link is a constant value, establishing an optimization model by taking maximization of the traversal reachable rate of the V2V link and the V2I link as an objective function under the constraint of the link outage probability, and searching for a power distribution coefficient enabling the upper boundof the total reachable rate of the V2V link and the V2I link to be maximum. According to the method, the compact upper bound of the reachable rate is used for replacing complex accurate solution calculation, and the time complexity of the algorithm can be greatly improved while the error range is ensured. The total reachable rate of the system is maximized under the constraint of the outage probability of the system, and the performance of the Internet of Vehicles system is comprehensively improved.

Description

technical field [0001] The invention relates to an optimization method for an Internet of Vehicles system based on Nakagami-m channel fading, and belongs to the technical field of wireless communication networks. Background technique [0002] Vehicle networking technology is a wireless communication technology that can effectively reduce traffic accidents and improve traffic operation efficiency. The Internet of Vehicles allows adjacent vehicles to exchange real-time information (such as relative distance, fault conditions, road conditions ahead, etc.) to ensure road safety to the greatest extent. [0003] In the process of wireless channel propagation, due to the common influence of several fading effects, a signal with a certain power will be attenuated to different degrees after propagation. Among them, path fading refers to the power diffusion of electromagnetic waves when they are transmitted on the channel, so that the received power of the receiving point is smaller ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/40H04W4/44H04W4/46H04W24/02H04L12/24H04B17/345H04B17/309
CPCH04W4/40H04W4/44H04W4/46H04W24/02H04L41/0823H04L41/142H04B17/345H04B17/309Y02T10/40Y02D30/70
Inventor 倪艺洋刘娅璇王玉玺王琴赵海涛朱辉生
Owner 江苏第二师范学院
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