Unlock instant, AI-driven research and patent intelligence for your innovation.

Reliability detection of channel quality indicator (CQI) and application to outer loop power control

A channel quality and indicator technology, applied in the direction of climate sustainability, local circuits, sustainable communication technology, etc., can solve problems such as unreliable determination of CQI

Inactive Publication Date: 2006-01-11
INTERDIGITAL TECH CORP
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Therefore, based on the existing technology, the network (base station or RNC) does not have the ability to reliably determine whether a CQI is received in error, the network can only configure the WTRU to use a high enough UL transmit power, which is based on a UL target SIR and "experience" from simulations, so that erroneous results are unlikely to occur, and are not harmful to the operation of the HSDPA system, so it would be very convenient to provide a method of reliably detecting and reporting the correctness of the received CQI value helpful

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
  • Reliability detection of channel quality indicator (CQI) and application to outer loop power control
  • Reliability detection of channel quality indicator (CQI) and application to outer loop power control
  • Reliability detection of channel quality indicator (CQI) and application to outer loop power control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] As used and described hereinafter, a WTRU includes but is not limited to a user device; a mobile station; a fixed or mobile subscriber unit; a pager or any form of device that can operate in a wireless environment. When discussed later, a base station includes but is not limited to a Node B; a Node Controller; an Access Point or any form of interface device in a wireless environment.

[0027] figure 1 Shown is a method 100 for determining the reliability of a CQI and its application to an out-of-loop power controller according to the present invention. The method 100 starts by initializing a time slot timer and several counters, such as total HS-SICHs received, wrong HS-SICHs received and number of missed HS-SICHs (step 102), the CQI is received ( Step 104) and decoding (step 106), the two maximum decision routing count values ​​are evaluated to determine whether they are lower than the threshold value (step 114), if the difference is lower than the threshold value, th...

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 present invention provides a method for improving the reliability of a channel quality indicator (CQI) message in a wireless communications network begins with receipt of the CQI message. The CQI message is then decoded, and a decision metric value for each symbol in the CQI message is computed. A largest decision metric value and a second largest decision metric value for the CQI message are determined. The reliability of the CQI message can be determined by comparing the two largest decision metric values. This method may be applicable to high-speed downlink packet access in time division duplex, frequency division duplex, or other modes of transmission.

Description

technical field [0001] The present invention generally relates to channel quality measurement in wireless communication, and in particular, the present invention relates to a method and device for reliably detecting channel quality, and its application to external power loop control. Background technique [0002] Today, third generation (3G) mobile communication systems have been standardized to implement efficient and high-throughput downlink (DL) packet data transmission mechanisms. In the context of the Universal Mobile Telecommunications System (UMTS) Wideband Code Division Multiple Access (W-CDMA) based on the 3G system, this packet transmission technology usually refers to High Speed ​​Downlink Packet Access (HSDPA). Both (FDD) and Time Division Duplex (TDD) are available, and they perform at chip rates of 1.28Mcps and 3.84Mcps. [0003] The next characteristic features are the proven effectiveness and achievable data processing capabilities for HSDPA: Adaptive Modula...

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
IPC IPC(8): H04L23/02
CPCY02D30/70
Inventor 史蒂芬·G·迪克马里恩·鲁道夫詹姆斯·M·米勒
Owner INTERDIGITAL TECH CORP