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Cross-layer interference limited power distribution method for cognitive radio networks

A cognitive radio, cross-layer interference technology, applied in the field of power allocation with limited cross-layer interference

Inactive Publication Date: 2017-12-22
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of power allocation limited by cross-layer interference in wireless cognitive radio networks, and provide a method for power allocation limited by cross-layer interference in cognitive radio networks

Method used

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  • Cross-layer interference limited power distribution method for cognitive radio networks
  • Cross-layer interference limited power distribution method for cognitive radio networks
  • Cross-layer interference limited power distribution method for cognitive radio networks

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Embodiment 1

[0092] The method designed in this embodiment introduces cross-layer interference restriction to protect secondary users in the network from excessive interference. The concept of virtual queue is introduced to convert the extra packet delay caused by multi-user contention for the channel into the queuing delay in the virtual queue corresponding to the channel. The main implementation operations involved are the construction of the cognitive radio network model of the underlying spectrum sharing, the problem transformation of the power allocation problem, and the specific algorithm design process.

[0093] This embodiment is oriented to a cognitive radio network cross-layer interference-limited power allocation method, which mainly includes the following key steps:

[0094] 1. The construction of the cognitive radio network model structure of the underlying spectrum sharing:

[0095] Section 1.1. Establish transmission power model P k,m,l , P k,m,l Indicates the power of th...

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Abstract

The invention discloses a cross-layer interference limited power distribution method for cognitive radio networks. The method studies the problem of power distribution in multi-user underlying spectrum shared cognitive radio networks based on FBMC-OQAM. The method comprises the following steps: in order to improve the energy efficiency of the entire network, introducing cross-layer interference restrictions to protect secondary users in the network from excessive interference; introducing the concept of virtual queues, and converting an extra packet delay caused by multi-user contention channels to a queuing delay in the virtual queues corresponding to the channels; proposing a nonlinear programming problem with nonlinear constraints by taking the system energy efficiency as an objective function and taking the delay and transmission power as constraint conditions; and converting the problem to a convex polynomial nonlinear programming problem through some transformations, and further calculating a global optimal solution by adopting a Lagrange dual method. Compared with some existing methods, the method (EEPA) has higher performance in improving the energy efficiency, ensures that the power distribution for each user is more reasonable, and has certain practical values.

Description

【Technical field】 [0001] The invention belongs to the technical field of communication, and in particular relates to a power allocation method with limited cross-layer interference for a cognitive radio network. 【Background technique】 [0002] Underlayment cognitive radio (Cognitive Radio, CR) network is a cognitive radio network with controllable interference, which can bring interference to primary users, but it cannot exceed its allowable interference temperature limit. By adding an interference temperature limit to the transmit power of the secondary user, it is ensured that the interference of each primary user does not exceed the threshold value. Therefore, the interference temperature constraint plays a key role in the resource allocation of this type of model; secondary users can obtain the interference temperature limit through energy detection or cooperation. [0003] In this mode, the secondary user does not need to be aware of the existence of the primary user i...

Claims

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Application Information

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IPC IPC(8): H04B17/391H04B17/382H04B17/336H04B17/309
CPCH04B17/309H04B17/336H04B17/382H04B17/3912
Inventor 张德干张捷葛辉周舢张婷
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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