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Sample selection for secondary synchronization signal (sss) detection

A technology for assisting synchronization signals and synchronization signals, which can be used in synchronization devices, multiplexing communication, wireless communication, etc., and can solve problems such as performance degradation and transmission interference.

Active Publication Date: 2013-05-22
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the uplink, transmissions from a UE may cause interference with transmissions from other UEs communicating with neighboring base stations
The interference can degrade performance on both the downlink and uplink

Method used

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  • Sample selection for secondary synchronization signal (sss) detection
  • Sample selection for secondary synchronization signal (sss) detection
  • Sample selection for secondary synchronization signal (sss) detection

Examples

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Embodiment Construction

[0042] The techniques described herein may be used for various wireless communication networks such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and others. The terms "network" and "system" are often used interchangeably. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, and so on. UTRA encompasses Wideband-CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). OFDMA networks can be implemented such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE802.20, And so on radio technology. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from ...

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Abstract

Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

Description

[0001] Cross References to Related Applications [0002] This application asserts U.S. Provisional Patent Application No. 61 / 375,649, filed August 20, 2010, and filed August 18, 2011, entitled "SAMPLE SELECTION FOR SECONDARY SYNCHRONIZATION SIGNAL (SSS) DETECTION), which is incorporated herein by reference. technical field [0003] Certain aspects of the disclosure relate generally to wireless communications, and more specifically to selecting samples for secondary synchronization signal (SSS) detection. Background technique [0004] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing available network resources. Examples of such multiple-access networks include Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00
CPCH04J11/005H04J11/0093H04J11/0069H04W56/001H04B7/2603H04J11/0076H04B7/2643H04J2211/001H04J2211/005H04W24/02H04W72/23
Inventor 骆涛卡皮尔·巴塔德张晓霞游太祥罗锡梁刘柯
Owner QUALCOMM INC
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