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Method and apparatus for determining cell timing in a wireless communication system

A cell timing and wireless communication technology, applied in the field of communication, can solve problems such as signal path disappearance, channel gain and/or delay change, etc.

Inactive Publication Date: 2013-10-16
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The channel gain and / or delay of each signal path may vary due to various factors such as UE mobility, environmental changes, etc.
Also, due to these factors, new signal paths may be formed and existing signal paths may disappear

Method used

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  • Method and apparatus for determining cell timing in a wireless communication system
  • Method and apparatus for determining cell timing in a wireless communication system
  • Method and apparatus for determining cell timing in a wireless communication system

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Embodiment Construction

[0019] The techniques described herein can be used in various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and others. The terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and others. UTRA includes Wideband-CDMA (WCDMA) and other variants of CDMA. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA system can implement a radio technology such as Global System for Mobile Communications (GSM). The OFDMA system can implement such as evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash- and other radio technologies. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is an upcoming release of UMTS that uses E-UTRA, which employs OFDMA on the downlink and SC-FDMA on the uplink. UTRA, E-UTRA, UMTS, LTE...

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Abstract

Techniques for determining the timing of a cell in a wireless communication system are described. A user equipment (UE) may obtain received samples that include at least one synchronization signal generated based on a cell identity (ID) of a cell. The UE may correlate the received samples with the at least one synchronization signal in the time domain at different time offsets to obtain energies for multiple timing hypotheses. The UE may identify at least one detected peak based on the energies for the multiple timing hypotheses. The UE may then update a set of candidate peaks based on the at least one detected peak and may identify a candidate peak with signal strength exceeding the signal strength of a peak being tracked. The UE may provide the timing of the identified candidate peak as the timing of the cell.

Description

[0001] This application claims priority to U.S. Provisional Application No. 60 / 953,971, filed August 3, 2007, entitled "TIMING SEARCHMETHOD FORE-UTRAN," assigned to the assignee of this application and incorporated by reference This article. technical field [0002] The present disclosure relates generally to communications, and more particularly to techniques for determining cell timing in wireless communication systems. Background technique [0003] Wireless communication systems are widely deployed to provide various communication content such as voice, video, packet data, messaging, broadcast, etc. These wireless systems may be multiple-access systems capable of supporting multiple users by sharing available system resources. Examples of such multiple access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal OFDM (OFDMA) systems, and Single Carrier FDMA...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00
CPCH04L27/2671H04L27/2663H04L27/2675H04J11/0069H04W56/00
Inventor 罗涛
Owner QUALCOMM INC