Utility function based distributed type power control method for cognitive radio system

A cognitive radio and power control technology, applied in the direction of transmission control/equalization, transmission system, electrical components, etc., can solve the problem of no power control scheme found

Inactive Publication Date: 2010-01-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the existing schemes, we have not found any good power control scheme that can meet the above contradictory requirements and is suitable for cognitive radio networks

Method used

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  • Utility function based distributed type power control method for cognitive radio system
  • Utility function based distributed type power control method for cognitive radio system
  • Utility function based distributed type power control method for cognitive radio system

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Experimental program
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Embodiment Construction

[0112] The present invention assumes that before determining the power of each cognitive user on each channel, the common control channel in the cell has been established, and the channel allocation has also been completed.

[0113] In order to ensure the convergence of UPCAC, only one CRU can choose a strategy at a time. We use some research methods to determine which CRU is responsible for strategy selection each time - the probability that each CRU can successfully perform strategy selection is P S =1 / N.

[0114] The present invention introduces a new frame (POWER_ALLOC) to announce the power change of the CRU for strategy selection. This frame contains an acknowledgment of the POWER_ALLOC frame sent by the last CRU using the same channel. image 3 A possible POWER_ALLOC structure is given.

[0115] Protocol steps:

[0116] Step 1: Set the initial transmit power on the channels available to all CRUs to zero;

[0117] Step 2: Perform a Bernoulli test with probability P ...

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Abstract

The invention provides a utility function based distributed type power control method for a cognitive radio system, belongs to the technical field of wireless communication, and particularly relates to power control used in the cognitive radio system. The invention relates to a compromise solution not only meeting the requirement on protecting a main user, but also supporting the requirement on the service quality of the cognitive user. The scheme is based on the non-cooperative game theory, namely the self-regulation of transmitting power of various CRUs is only needed, so that the defect existing in the conventional distributed type power control that huge information interaction is needed is overcome. By analyzing the geometric characteristics of the utility function, skillfully setting the parameters of the utility function and simultaneously combining the access control, the convergence of power is ensured; simultaneously, by regulating the parameters, the needs for the prior network services are met; in addition, a frame structure and a protocol flow which are suitable for the power control method are designed, and the frame structure and the protocol flow are suitable for any distributed type cognitive radio system, so that the power control method has quite strong practicability.

Description

technical field [0001] A distributed power control method based on a utility function in a cognitive radio (Cognitive Radio) system belongs to the technical field of wireless communication, and in particular relates to power control applied in a cognitive radio system. Background technique [0002] With the development of wireless communication technology, the current wireless applications continue to expand, and the lack of spectrum resources has become an unavoidable problem in the process of wireless application research. Current spectrum management strategies are based on a static control model. The management agency divides the available spectrum resources into fixed, non-overlapping spectrum blocks, and divides them by guard bands, and allocates these spectrum blocks to different services and technologies in an exclusive manner, such as: mobile communication operators, broadcasting Television, military and public safety sectors. However, a large number of measurement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B1/69
CPCY02B60/50
Inventor 车越岭陈劼王军唐万斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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