US 8,286,052 B2 · Wireless communication method and apparatus for detecting and decoding enhanced dedicated channel hybrid automatic repeat request indicator channel transmissions

Abstract

A wireless communication method and apparatus for detecting and decoding enhanced dedicated channel (E-DCH) hybrid automatic repeat request (H-ARQ) indicator channel (E-HICH) transmissions are disclosed. A wireless transmit/receive unit (WTRU) receives E-HICH transmissions and detects an H-ARQ indicator transmitted via the E-HICH by performing a binary hypothesis test. The WTRU then generates an acknowledgement (ACK) message or a non-acknowledgement (NACK) message based on the detected H-ARQ indicator. A reliability test may be further performed to improve performance, whereby the binary hypothesis test may be performed only if the reliability test is passed.

Claims15

Dependent claims

A method of detecting an enhanced dedicated channel (E-DCH) hybrid automatic repeat request (H-ARQ) indicator, the method comprising:

a wireless transmit/receive unit (WTRU) receiving an E-DCH H-ARQ indicator channel (E-HICH) transmission carrying an H-ARQ indicator;
the WTRU calculating a log likelihood ratio (LLR) of a conditional probability that an acknowledgement (ACK) indicator is transmitted to a conditional probability that a non-acknowledgement (NACK) indicator is transmitted;
the WTRU comparing the LLR to a predetermined threshold;
and
the WTRU determining the H-ARQ indicator as a NACK indicator on a condition that the LLR is below the threshold, and determining the HARQ indicator is an ACK indicator on a condition that the LLR is not below the threshold.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/469,982Filed 21 May 2009 · continuation

Priority

18 Aug 2005

Published

US 2009/0228753 A110 Sep 2009

Granted

9 Oct 2012

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04L 1/1867
Automatic repetition systems, e.g. Van Duuren systems: arrangements specially adapted for the transmitter end
H04L 1/0072
By using forward error control: error control for data other than payload data, e.g. control data
H04L 1/1812
Automatic repetition systems, e.g. Van Duuren systems: hybrid protocols; Hybrid automatic repeat request [HARQ]
H04L
Digital communication

Family

Application60/709,952Us provisional application · filed 18 Aug 2005

Application11/477,278Parent of this continuation · filed 29 Jun 2006

US 7,574,645 B2Parent of this continuation · filed 11 Aug 2009

US 2009/0228753 A1Pre-grant publication · published 10 Sep 2009

US 2007/0061664 A1Published application

US 8,286,052 B2This patent

From the US filing history. Foreign family members aren’t listed.

Wireless communication method and apparatus for detecting and decoding enhanced dedicated channel hybrid automatic repeat request indicator channel transmissions

Life of this patent

Wireless communication method and apparatus for detecting and decoding enhanced dedicated channel hybrid automatic repeat request indicator channel transmissions

Life of this patent

Abstract

Claims15