Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for sending electric power control in code division multiple Address system

A circuit and packet data technology, which is applied in the direction of code division multiplexing system, power management, transmission system, etc., can solve the problems of long time, decrease of electric power control accuracy, frequent increase or decrease of received electric power, etc.

Inactive Publication Date: 2003-11-12
NEC CORP
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned reissued patent also has the following problem: if the output ratio of the received signal of the desired wave to the interference wave is small, the accuracy of the interference electric power will decrease, which will cause the accuracy of the electric power control itself to also decrease
[0008] The second problem is that it takes some time to adjust the output ratio of the target signal to the interference wave if the downlink packet data reappears
This is because, during the detection of the block error rate, if there is a large change in the surrounding environment, it takes a long time to modify the output ratio of the target signal to the interference wave
[0009] The third problem is that although there is no downlink packet data, it also consumes the resources of the base station
However, the reception electric power at the mobile station is frequently raised or lowered while receiving intermittent packet data, making it impossible for the base station to stably perform transmission electric power control

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for sending electric power control in code division multiple Address system
  • Method for sending electric power control in code division multiple Address system
  • Method for sending electric power control in code division multiple Address system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Hereinafter, embodiments of the present invention are described in detail with reference to the accompanying drawings.

[0028] figure 1 is a block diagram showing the first embodiment of the mobile radio device according to the present invention. Hereinafter, a CDMA cellular telephone device utilized by the CDMA system is referred to as a mobile radio device.

[0029] figure 1 The shown CDMA cellular phone device is composed of an antenna 1 , a radio section 2 , a baseband section 3 , a processor 4 , a memory 5 , a storage device 6 and a speed measurement section 7 .

[0030] The radio section 2 has a modulation / demodulation circuit that modulates and demodulates radio signals transmitted and received via the antenna 1.

[0031] The baseband section 3 includes: an encoder that performs error correction coding on data sent from the processor 4; a circuit that divides a radio frame; and a circuit that performs orthogonal code spreading. In addition, the baseband sect...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Conventionally, there is a problem that a block error rate cannot be measured when packet data does not exist during packet data transmission and therefore, output adjustment cannot be performed at an outer loop. This invention provides an electric power control method that a range having a maximum value, which is an output ratio of initial target signal to disturbance wave added with an offset addition value, and a minimum value, which is the output ratio of initial target signal to disturbance wave subtracted an offset subtraction value, is set. In addition, in the method, if an output ratio of target signal to disturbance wave is equal to or more than the maximum, the output ration of target signal to disturbance wave is set to the maximum, if an output ratio of target signal to disturbance wave is equal to or less than the minimum, the output ration of target signal to disturbance wave is set to the minimum, and if an output ratio of target signal to disturbance wave is within the range, no adjustment is performed.

Description

technical field [0001] The present invention relates to a CDMA system cellular phone device, and to a transmission electric power control method for outer loop downlink electric power control in packet communication. Background technique [0002] Considering the efficient use of frequency bands and the secrecy of communication content, Code Division Multiple Access (CDMA) systems are beginning to be used instead of Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA), which are traditionally used in cellular telephone devices. Multiple Access and Time Division Multiple Access as multiple access systems. A Code Division Multiple Access (hereinafter referred to as CDMA) system with spreading codes is utilized in W-CDMA and cdma2000, which are specifications for third-generation cellular phone devices. [0003] In the CDMA system, multiple communicators share the same frequency band, so the signals of other communicators become interference signal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/04H04B7/005H04B7/26H04J13/00H04W52/12H04W52/36
CPCH04W52/12
Inventor 远野浩介
Owner NEC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com