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Scrambling methods for synchronization channels

A technology of synchronization channel and main synchronization channel, applied in wireless communication, multiplexing communication, orthogonal multiplexing system, etc., can solve problems such as hindering the phase reference of synchronization channel signal and speeding up battery discharge speed.

Active Publication Date: 2010-03-24
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, an inefficient synchronization process can lead to accelerated battery discharge
Furthermore, the collision of sync channels prevents the sync channel signal from serving as the phase reference for the data channel

Method used

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  • Scrambling methods for synchronization channels
  • Scrambling methods for synchronization channels
  • Scrambling methods for synchronization channels

Examples

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Embodiment Construction

[0028]Various embodiments are now described with reference to the drawings, wherein like reference numerals are used to indicate like elements herein. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0029] As used in this application, the terms "system," "component," "module" and similar terms are intended to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to being, a program running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a...

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Abstract

Systems and methods are provided that facilitate generation and detection of synchronization channels in a wireless communication system. A one-to-one relationship is established among a set of scrambling codes (SCs) and a set of primary synchronization channel (P-SCH) sequences which are determined by a reusable sector identifier that is determined through detection of the P-SCH channel. The setof scrambling codes are utilized to (i) scramble a secondary synchronization channel sequence which facilitates detection of the S-SCH sequence once the reusable sector identifier is detected, or (ii) compose an unscrambled S-SCH sequence through a sequential or interleaved concatenation of SCs wherein a concatenation indication is received in a mobile terminal. Cyclic shifts and sign-flip operations applied to a base sequence are employed to generate SCs. A lookup table and a library of SCs facilitate scrambling code determination in a mobile terminal that receives associated P-SCH and S-SCHsequences.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This application claims the benefit of U.S. Provisional Application Serial No. 60 / 940,354, filed May 25, 2007, entitled "SCRAMBLINGMETHODS FOR SYNCHRONIZATION CHANNELS IN E-UTRA," which is incorporated by reference in its entirety this application. technical field [0003] In general, the present invention relates to wireless communications and, in particular, to the generation and scrambling of synchronization channel sequences for efficient cell acquisition. Background technique [0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, data, and so on. These systems may be multiple-access systems capable of supporting simultaneous communication between multiple terminals and one or more base stations. Multiple-access communications rely on sharing available system resources, such as bandwidth and transmit power. Examples of multiple-access ...

Claims

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Application Information

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IPC IPC(8): H04B1/707
CPCH04J11/0069H04W48/16H04W48/12H04W88/02
Inventor 罗涛
Owner QUALCOMM INC