Method for obtaining synchronization signal in wireless communication system

• US 8,625,526 B2
• Filed: 12/31/2008
• Issued: 01/07/2014
• Est. Priority Date: 01/03/2008
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Seung Hee, Noh, Min Seok, Kwak, Jin Sam, Lee, Hyun Woo, Kim, Dong Cheol, Moon, Sung Ho, Lee, Wook Bong, Kwon, Yeong Hyeon
• Primary Examiner(s): Hamza, Faruk
• Assistant Examiner(s): PHAM, TITO Q
• Application Number:
  US12/811,465
• Publication Number:
  US 20100296429A1
• Time in Patent Office: 1,833 Days
• Field of Search: None
• US Class Current: 370/330
• 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, the synchronization band and the usual band having the same structure in a time domain by comprising the same number of orthogonal frequency division multiplexing (OFDM) symbols having the same length, the synchronization band the usual band being multiplexed using a frequency division multiplexing (FDM) scheme;

searching for a primary synchronization signal (PSS) for a dedicated MBMS in the synchronization band, a length of a Zadoff-Chu (ZC) sequence used as the PSS for the dedicated MBMS being two times higher than a length of a ZC sequence used as a PSS for a unicast, the ZC sequence used as the PSS for the dedicated MBMS; 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).