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Synchronization transmissions in a wireless communication system

A technology of synchronous transmission and synchronous sequence, which is applied in the field of communication and can solve problems such as not knowing the base station

Active Publication Date: 2009-09-02
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The UE may have just been powered on, or it may be out of coverage, so the UE may not know the base stations that can be connected

Method used

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  • Synchronization transmissions in a wireless communication system
  • Synchronization transmissions in a wireless communication system
  • Synchronization transmissions in a wireless communication system

Examples

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Embodiment Construction

[0023] figure 1 A wireless communication system 100 is shown comprising a plurality of Node Bs 110 . A Node B is typically a fixed station that communicates with a number of UEs and may also be called a base station, enhanced Node B (eNode B), access point, and so on. Each Node B 110 provides communication coverage for a particular geographic area. The term "cell" can refer to a Node B and / or its coverage area depending on the context in which the term is used. In order to expand the system capacity, the coverage area of ​​Node B can be divided into multiple smaller areas, for example, it can be divided into three smaller areas, each of which is served by its own base transceiver station (BTS). The term "sector" can refer to a BTS and / or its coverage area depending on the context in which the term is used. For a sectorized cell, the BTSs of all sectors in the cell are usually co-sectored within the Node B of the cell. The techniques described in this application can be use...

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PUM

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Abstract

To support cell search, multiple (e.g., two) synchronization transmissions are sent in a frame with non-uniform spacing. Information is conveyed via the non-equal distances between consecutive synchronization transmissions. Multiple levels of non-uniform spacing may be used to convey different types of information. In one design, the multiple synchronization transmissions are sent in different subframes of a frame, and each synchronization transmission is sent in one of multiple symbol periods in a respective subframe. The synchronization transmissions may be sent in non-evenly spaced subframes to convey frame boundary. One synchronization transmission may be sent in one of multiple possible symbol periods depending on the information, e.g., a particular group of cell IDs, being conveyed. The distances between synchronization transmissions may also be used to convey cyclic prefix length. A secondary synchronization transmission carrying a cell ID may be sent at a predetermined offset from one of the multiple synchronization transmissions.

Description

[0001] This application claims priority to U.S. Provisional Patent Application No. 60 / 828,051, filed October 3, 2006, entitled "AMETHOD AND APPARATUS FOR P-SCH FOR E-UTRA," which is assigned to this application assignee, and is incorporated into this application by reference. technical field [0002] In general, the present invention relates to communication, and in particular, the present invention relates to techniques for supporting cell search in a wireless communication network. Background technique [0003] Wireless communication systems are widely used to provide various types of communication content (eg, voice, video, packet data, messaging, broadcast, etc.). These systems may be multiple-access systems capable of supporting communications with 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 A...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04L27/26
CPCH04J11/0069H04L5/0007H04L5/0053H04B2201/70701H04B1/7083H04J11/0073H04W56/00H04W88/02H04J11/0076H04W48/16
Inventor B·金D·P·马拉蒂
Owner QUALCOMM INC
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