Monotonicity optimization and linear search based power control method in cognitive wireless network

A cognitive wireless network and linear search technology, applied in the field of power control based on monotonic optimization and linear search in cognitive wireless networks, can solve problems such as non-convex optimization

Inactive Publication Date: 2016-01-06
陕西博鳌纵横网络科技有限公司
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Problems solved by technology

However, the above-mentioned interference often makes the problem difficult to solve due to non-convex optimization. Therefore, it is mean

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  • Monotonicity optimization and linear search based power control method in cognitive wireless network
  • Monotonicity optimization and linear search based power control method in cognitive wireless network
  • Monotonicity optimization and linear search based power control method in cognitive wireless network

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Embodiment Construction

[0095] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0096] refer to figure 1, a power control method based on monotonicity optimization and linear search in cognitive wireless networks, the implementation of this method can maximize the net income of PU and improve the utilization rate of spectrum resources of the whole system under the premise of satisfying PU and SUs at the same time . The present invention is applied in cognitive radio network (such as figure 1 shown). A scenario in which licensed users PU share their own spectrum with unlicensed users SUs to obtain additional revenue. Here, the authorized user PU needs to serve the unlicensed users SUs and meet their respective throughput requirements while ensuring their own throughput, and also consider the additional transmission power consumption of the authorized user PU to overcome the corresponding interference. Aiming at this problem, the metho...

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Abstract

The invention relates to a monotonicity optimization and linear search based power control method in the cognitive wireless network. The method comprises the following steps that (1) interference between a PU and SUs and interference among different SUs are taken into consideration, and an optimization problem is described as a multivariable non-convexity optimization problem; (2) the problem (P1) is decomposed into two levels of optimization problems vertically; (3) according to the bottom level of problem, a power control method of monotonicity optimization is provided, and the transmission power of SUs is optimized under the condition that the transmission power of PU is given; (4) on the basis of the bottom level of problem, a linear searching method is provided, and the transmission power of the PU is further optimized; and (5) and the problem (P1) is finally solved via iterative iteration of the bottom level of problem and the top level of problem. The optimization method can be used to ensure the QoS of the PU and maximize the net income of the PU at the same time, the utilization rate of system spectrum is improved, and configuration of system resource is optimized.

Description

technical field [0001] The invention relates to an optimal power control method based on monotonic optimization and linear search algorithm in a cognitive radio network. Background technique [0002] With the rapid growth of mobile data services, the limited available spectrum resources make the problem of spectrum congestion increasingly prominent. Dynamic Spectrum Access (DSA), as an effective supplement to the traditional fixed spectrum allocation method in the mobile network, intelligently reuses the licensed spectrum fully utilized by the unlicensed system (PrimarySystem-PS) or licensed user (PrimaryUser-PU) Resources, so that unlicensed users (SecondaryUser-SU) can access the licensed spectrum of the PU for data transmission in a timely manner, so that the spectrum utilization rate is effectively improved. Due to its superiority, DSA is considered to be a model of a spectrum supply method that can be flexible and respond to current needs, and has a broad prospect. Ho...

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Application Information

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IPC IPC(8): H04W52/18
CPCH04W52/18
Inventor 吴远何艳飞严雨桐陈佳超钱丽萍
Owner 陕西博鳌纵横网络科技有限公司
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