Supercharge Your Innovation With Domain-Expert AI Agents!

Downlink power control method at downlink discontinuous transmission for wireless communication system

A wireless communication system, power control technology, applied in transmission control/equalization, climate sustainability, sustainable communication technology, etc. and other problems, to achieve the effect of reducing the computational complexity and improving the quality of downlink communication

Inactive Publication Date: 2010-06-16
GLOBAL INNOVATION AGGREGATORS LLC
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the downlink CCTrCH is in the state of discontinuous transmission, the base station can only receive SBs at a period of SBGP radio frames during discontinuous downlink transmission. At this time, the base station cannot control the power of SBs during DTX and the initial power after DTX downlink data power
[0006] For the downlink power control method in the downlink discontinuous transmission process, if the downlink SBs are determined by the open-loop power control method of estimating the path loss through the uplink channel, or the method of initial downlink signal transmission power after the downlink data is restored, the power control error Larger, complex to implement, negatively impacts downlink performance and link maintenance during downlink DTX

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
  • Downlink power control method at downlink discontinuous transmission for wireless communication system
  • Downlink power control method at downlink discontinuous transmission for wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] An example of downlink power control in a TD-SCDMA system during downlink DTX is given below with reference to the accompanying drawings.

[0035] For any CCTrCH channel where downlink DTX may occur:

[0036] (1) The base station calculates the average transmit power of the channel without DTX where ρ is the weight, is the average transmit power calculated on the current subframe, Indicates the average transmit power calculated on the previous subframe, ρ can be selected through simulation according to network needs and channel conditions, and the range that can be selected in the project is 1 / 16 to 6 / 16;

[0037] (2) The base station calculates the instantaneous transmit power P of the current subframe when the channel is not DTX n and mean The absolute value of the deviation of : Among them, abs() represents the operation of taking the absolute value;

[0038] (3) The base station calculates the above deviation δ n mean of: where q is the weight, Indic...

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

The method includes steps: base station (BS) calculates mean of transmitted power of current sub frame when there is no discontinuous transmission (DT); BS calculates absolute value of deviation between transient transmission and the said mean of current sub frame; BS calculates mean of absolute value of deviation of current sub frame; when down going channel enters into DT, BS determines whethertransient transmission power of current sub frame is smaller than sum of mean of transmitted power and mean of deviation; using adjusted transient transmission power of current sub frame being as downgoing special bursting transmission power in down going DT, and data down going initial transmission power when DT ends. When down going DTX, the method prevents power control in open loop by estimating path loss through up going channel. The invention compensates down going transmission power by using little computation complexity in order to improve down going communication quality.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a downlink power control method during downlink discontinuous transmission in a wireless communication system. Background technique [0002] Uplink and downlink power control technologies are widely used in UTRA (Universal Telecommunication Radio Access) FDD and UTRA (Universal Telecommunication Radio Access) TDD 3.84 / 1.28Mcps systems. [0003] The conventional downlink power control process is as follows: After receiving the signal from the base station, the user equipment determines whether to increase or decrease the transmit power of the base station according to the SIR (Signal-to-Interference Ratio) measurement value of the downlink signal, and generates a corresponding power control command . The user equipment transmits the power control command to the base station through the uplink feedback channel, and the base station can properly adjust the do...

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 Patents(China)
IPC IPC(8): H04B7/005
CPCY02D30/70
Inventor 马毅华
Owner GLOBAL INNOVATION AGGREGATORS LLC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com