Method for Obtaining Synchronization Signal In Wireless Communication System

• US 20100296429A1
• Filed: 12/31/2008
• Published: 11/25/2010
• Est. Priority Date: 01/03/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dong Cheol, Kwak, Jin Sam, Noh, Min Seok, Han, Seung Hee, Moon, Sung Ho, Kwon, Yeong Hyeon, Lee, Hyun Woo, Lee, Wook Bong
• Granted Patent: US 8,625,526 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04J 11/0073 Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
• CPC Class Codes: H04J 11/0076 Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 27/2675 Pilot or known symbols
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/00 Local resource management

Abstract

A method for obtaining a synchronization signal in a wireless communication system includes dividing a full frequency band into a synchronization band for transmission of the synchronization signal and a usual band for transmission of multicast broadcast multimedia service (MBMS) data, and searching for a primary synchronization signal (PSS) for a dedicated MBMS in the synchronization band, and detecting the PSS for the dedicated MBMS through the synchronization band.

Claims

1. A method for obtaining a synchronization signal in a wireless communication system, the method comprising:

dividing a full frequency band into a synchronization band for transmission of the synchronization signal and a usual band for transmission of multimedia broadcast multicast service (MBMS) data, and searching for a primary synchronization signal (PSS) for a dedicated MBMS in the synchronization band; and

detecting the PSS for the dedicated MBMS through the synchronization band.

2. The method of claim 1, wherein the synchronization band is located at a center of the full frequency band.

3. The method of claim 1, wherein an orthogonal frequency division multiplexing (OFDM) symbol assigned to the PSS for the dedicated MBMS has the same size in the synchronization band and the usual band.

4. The method of claim 1, wherein an OFDM symbol assigned to the PSS for the dedicated MBMS in the synchronization band has a half size of an OFDM symbol of the usual band.

5. The method of claim 1, wherein an OFDM symbol in the same time domain as the PSS for the dedicated MBMS in the usual band has a half size of another OFDM symbol.

6. The method of claim 1, wherein the PSS in the synchronization band has a half bandwidth of the synchronization band.

7. The method of claim 1, further comprising, after detecting the PSS for the dedicated MBMS, receiving broadcasting information transmitted equally by a plurality of base stations through a primary synchronization channel (P-SCH).

8. A method for transmitting a synchronization signal in a wireless communication system, the method comprising:

transmitting a PSS through a synchronization band having a part of a bandwidth of a full frequency band; and

transmitting MBMS data through a usual band excluding the synchronization band from the full frequency band, wherein a root index of the PSS is one of root indices of a plurality of Zadoff-Chu (ZC) sequences selected in an ascending order of a frequency offset sensitivity.

9. The method of claim 8, wherein the root index of the PSS indicates whether a dedicated MBMS is applied or not.