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Method for controlling transmission power in mobile communication system

A technology for transmit power control and mobile communication systems, which is applied in transmission control/equalization, power management, transmission systems, etc., and can solve problems such as high power consumption and power reduction

Inactive Publication Date: 2004-11-10
ERICSSON-LG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] Therefore, when the deviation between the detected power level Pm and the reference level Po is large, the problem is that it takes a long time to control the detected power Pm to become a sufficient suitable energy level.
Then, as mentioned above, the terminal continuously reduces the power by 1dB, so it takes a long time to adjust the power level to a suitable value, which results in high power consumption

Method used

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  • Method for controlling transmission power in mobile communication system
  • Method for controlling transmission power in mobile communication system
  • Method for controlling transmission power in mobile communication system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0045] A method for controlling transmission power in a Code Division Multiple Access (CDMA) mobile communication system according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

[0046] Figure 4 It is a flowchart of a method for controlling transmission power of a base station in a mobile communication system using a CDMA method according to the present invention.

[0047] Such as Figure 4 As shown, the transmission power control method can be roughly divided into the power control process (S1-S5) in the access mode and the power control process (S6-S11) in the traffic mode.

[0048] The power control method in the access mode comprises the steps of: receiving an access channel (S1) from a terminal; detecting the transmit power level Pm of the access channel, and matching the detected power level Pm with a sufficient power level Po Compare and calculate the power deviation Pd (S2) of the two; judge whe...

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Abstract

A transmission power control method in a mobile communication system using a code division multiple access (CDMA) method includes: a power control process in an access mode having: a step of measuring a transmission power of an initial access channel transmitted from a terminal; a step of comparing the measured transmission power level with a pre-setted adequate power level; a step of transmitting a transmission power adjusting message to the terminal according to the comparison result; and a step of the terminal adjusting the transmitting power of the traffic channel to the adequate power level according to the transmission power adjusting message transmitted from a base station; and a power control process in a traffic mode having: a step of measuring the transmission power level of the traffic channel transmitted from the terminal; a step of comparing the measured transmission power level with the pre-setted adequate power level; a step of transmitting an one-bit power control bit to the terminal according to the comparison result; and a step of the terminal increasing / decreasing the transmitting power of the traffic channel by 1 dB according to the power control bit transmitted from the base station.

Description

technical field [0001] The present invention relates to a mobile communication system, and more particularly relates to a transmission power control method in a mobile communication system using a code division multiple access (CDMA) method. Background technique [0002] In mobile communication systems using the Code Division Multiple Access (CDMA) method, such as cellular mobile communication systems and personal communication service systems, a plurality of mobile stations transmit / receive signals represented by symbols representing digitized voice or other data through one base station or cell station. composed of frames. [0003] In general, the maximum transmission power of a mobile station (terminal) is set according to the cell with the largest radius. However, mobile stations often move within a given cell. Therefore, while some mobile stations are located near a base station, other mobile stations may not be located near the base station. Terminals near the base ...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04B7/005
CPCH04W52/50H04W52/36Y02B60/50H04W52/08H04W52/22H04B7/216
Inventor 李京国
Owner ERICSSON-LG