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Cognition TD-LTE system uplink power control method with vertical and horizontal interference considered

A power control and horizontal technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as not considering interference, not applicable to LTE system and TV system, etc.

Active Publication Date: 2014-01-01
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

The existing TD-LTE uplink power control algorithm mainly considers the performance of the TD-LTE system itself, and does not consider the interference with other systems, so it is not suitable for the scenario where the LTE system and the TV system coexist

Method used

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  • Cognition TD-LTE system uplink power control method with vertical and horizontal interference considered
  • Cognition TD-LTE system uplink power control method with vertical and horizontal interference considered
  • Cognition TD-LTE system uplink power control method with vertical and horizontal interference considered

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Embodiment

[0024] See image 3 The embodiment of the present invention provides a cognitive TD-LTE system uplink power control algorithm considering vertical and horizontal interference, including:

[0025] S100: Establish a vertical interference expression for a TV receiver by a single TD-LTE UE, as well as a vertical interference expression for the TV receiver and a horizontal interference expression for the FD-LTE UE of the entire TD-LTE system.

[0026] S200: Establish a utility function and a cost function based on the interference ratio according to the vertical interference to the horizontal interference ratio caused by the TD-LTE UE.

[0027] S300: Construct a non-cooperative game power control optimization model based on the utility function, and assume that the interference of the TD-LTE UE to the TV receiver is lower than the threshold and ensure that the signal-to-noise ratio of the TD-LTE UE is greater than the normal operating threshold to maximize the utility function for purpose...

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Abstract

The invention provides a cognition TD-LTE system uplink power control algorithm with vertical and horizontal interference considered. The algorithm is suitable for the situation that TD-LTE and FD-LTE use free television white spectrums with adjacent frequency bands at the same time and the frequency bands used by the two systems are adjacent to the frequency band of a television system. The algorithm comprises the steps that a vertical interference expression on a television receiver of a single TD-LTE user, and a vertical interference expression on the television receiver and a horizontal interference expression on FD-LTE UE of the whole TD-LTE system are presented; a utility function and a cost function based on interference proportion are established; a non-cooperation game power control optimization model is established; the existence and the uniqueness of an equilibrium solution of the non-cooperation game power control optimization model are proved according to the Nash equilibrium existence and uniqueness theorem; the non-cooperation game power control optimization model is solved. The algorithm guarantees normal working of the television system and lowers interference on FD-LTE system uplink.

Description

Technical field [0001] The present invention belongs to the field of wireless communication, and particularly relates to a time division long term evolution (TD-LTE, Time Division Long Term Evolution) power control and cognitive radio spectrum sharing technology. Background technique [0002] With the rapid development of wireless communication services and increasingly scarce spectrum resources, how to make full use of existing spectrum resources and improve spectrum utilization has become a hot issue of concern. Due to the transition from analog TV to digital TV, some frequency bands located in the UHF (Ultra High Frequency) and VHF (Very High Frequency) parts are free, called TV White Space (TVWS, TV White Space). ). How to use TV white space in wireless mobile communications has become a research hotspot. In addition, sharing TV white space with different heterogeneous systems has also become one of the hot research trends. [0003] We can make use of TVWS through cognitive r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04W52/24
Inventor 冯春燕郭玉婷郭彩丽厉东明李晓明
Owner BEIJING UNIV OF POSTS & TELECOMM
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