Method for controlling power of enhanced uplink absolute grant channel and subscriber terminal

A technology for accessing an allowed channel and enhancing uplink, which is applied to the power control method for enhancing the absolute access allowed channel in uplink and the field of user terminals.

Inactive Publication Date: 2010-05-05
ST ERICSSON SEMICON BEIJING
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although 3GPP defines the power control principle of E-AGCH, it does not give a specific power control process

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 controlling power of enhanced uplink absolute grant channel and subscriber terminal
  • Method for controlling power of enhanced uplink absolute grant channel and subscriber terminal
  • Method for controlling power of enhanced uplink absolute grant channel and subscriber terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] refer to figure 1 , the E-AGCH power control method of the embodiment of the present invention, wherein the following inner loop power control process is performed on the user terminal side:

[0054] Step 101: Demodulate the received E-AGCH, and measure the SNR of the E-AGCH according to the demodulation result;

[0055] The user terminal demodulates the downlink time slot signal where the E-AGCH is located, extracts demodulation symbols belonging to the E-AGCH, and performs SNR measurement according to the demodulation symbols.

[0056] Step 102: Decode the demodulated E-AGCH, and obtain the Resource Persistence Indicator (RDI) carried by the E-AGCH when the decoding is correct;

[0057] When RDI is equal to 0, it indicates that if the use...

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 invention provides a method for controlling the power of an enhanced uplink absolute grant channel (E-AGCH) and a subscriber terminal. The method comprises the following steps: demodulating a received E-AGCH and measuring the SNR (signal-to-noise ratio) of the E-AGCH according to the demodulation results; decoding the demodulated E-AGCH and acquiring the RDI (resource duration indicator) carried by the E-AGCH when the E-AGCH is correctly decoded; counting the number Th of the continuously received E-AGCHs until the current sub-frame when the RDI is equal to 0; averaging the Th continuous SNR measured values until the current sub-frame when Th is smaller than the preset threshold, and comparing the average value with the SNR target value to determine the TPC (transmit power control) command word; and predicting the SNR of the following sub-frame according to the Th continuous SNR measured values until the current sub-frame when Th is no smaller than the preset threshold, and comparing the SNR predicted value with the SNR target value to determine the TPC command word. Accordingly, the invention is capable of controlling the power of the E-AGCH more accurately and more effectively.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to an enhanced uplink absolute access grant channel (E-AGCH) power control method and a user terminal. Background technique [0002] In the standard of the third generation partnership (3GPP), in order to support the high-speed uplink packet access (HSUPA) feature, the uplink of the time division synchronous code division multiple access (TD-SCDMA) system has newly added the enhanced uplink dedicated channel (E- DCH). E-DCH is a transmission channel used to carry high-speed uplink data, its transmission time interval (TTI) is 5ms, supports high-order modulation, and layer 1 (L1) hybrid automatic repeat request (HARQ) process, the resources used by it , including power, time slot, code channel, etc., can be scheduled and allocated by the base station (NodeB). [0003] Two control channels are also defined in the uplink: an enhanced uplink control channel (E-UCCH) and an enhanc...

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): H04W52/12H04W52/14H04W52/24
Inventor 杨文学
Owner ST ERICSSON SEMICON BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap