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Power adjustment method and base station of orthogonal frequency division multiplexing (OFDM) system

A technology of orthogonal frequency division and power adjustment, applied in the field of downlink power adjustment method and base station, can solve the problems of lack of flexibility, sacrificing cell throughput rate, unable to fully release redundant power cell throughput capacity, etc. The effect of reducing the level of inter-cell interference

Active Publication Date: 2011-03-23
ZTE CORP
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Problems solved by technology

This method lacks flexibility. Although it is simple and easy to implement and reduces inter-cell interference to a certain extent, it cannot fully release the redundant power that causes interference and fully utilize the cell throughput at the cost of sacrificing cell throughput.

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  • Power adjustment method and base station of orthogonal frequency division multiplexing (OFDM) system
  • Power adjustment method and base station of orthogonal frequency division multiplexing (OFDM) system
  • Power adjustment method and base station of orthogonal frequency division multiplexing (OFDM) system

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Embodiment Construction

[0059] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0060] The present invention aims at the problem that the existing OFDM system usually adopts subcarrier and other power allocation strategies, which cannot fully release the redundant power causing interference and give full play to the throughput capacity of the cell, and provides a power control that can effectively solve the downlink interference of the OFDM system, making it A power adjustment method and a base station of an OFDM system that can fully release power redundancy, give full play to the throughput capability of a cell, and are easy to implement.

[0061] Such as figure 1 As shown, the power adjustment method of the OFDM system in the embodiment of the present invention includes:

[0062] Step 11, the base station obtains downlink channe...

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Abstract

The invention provides a power adjustment method and a base station of an orthogonal frequency division multiplexing (OFDM) system. The method comprises the following steps of: acquiring downlink channel quality information by the base station, and acquiring the grade of a modulation coding scheme according to the downlink channel quality information; acquiring downlink transmission quality information by the base station, and acquiring current power redundancy according to the downlink transmission quality information; and adjusting current power by the base station in accordance with a preset power adjustment quantity according to the current power redundancy and / or adjusting the grade of the modulation coding scheme according to a preset modulation coding scheme grade. The invention effectively solves the problem of power adjustment of downlink interference of the OFDM system and can sufficiently release the power redundancy and sufficiently perform the throughput capacity of a cell.

Description

technical field [0001] The present invention relates to the technical field of power control and interference coordination of a wireless communication system, in particular to a downlink power adjustment method and a base station suitable for an Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0002] As a symbol of a new generation of wireless communication technology, OFDM has shown its strong advantages in the development of wireless communication systems and has been adopted by various standards. The main technical advantages of the OFDM system are high spectrum efficiency, strong bandwidth expansion, strong anti-multipath fading ability, convenient allocation of spectrum resources, and easy implementation of MIMO (Multiple-Input Multiple-Output, multiple-input multiple-output or spatial diversity) technology etc. [0003] Like the traditional wireless cellular network, the OFDM system also improves spectrum utilization by reducing the fre...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04L1/00
CPCH04L1/0026H04L1/0009H04W52/42Y02B60/50H04L1/0003H04L27/2626
Inventor 赵刚曾召华秦洪峰周晖
Owner ZTE CORP
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