CELL SEARCH METHOD, FORWARD LINK FRAME TRANSMISSION METHOD, APPARATUS USING THE SAME AND FORWARD LINK FRAME STRUCTURE

• US 20110149947A1
• Filed: 02/28/2011
• Published: 06/23/2011
• Est. Priority Date: 07/25/2006
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: KIM, Il-Gyu, BANG, Seung-Chan, KO, Young-Jo, KIM, Young-Hoon, YI, Hyoseok, PARK, Hyeong-Geun, CHANG, Kapseok
• Granted Patent: US 8,311,031 B2
• Time in Patent Office: Days
• US Class Current: 370/350
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04J 11/0093 Neighbour cell search
• 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 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/001 Synchronization between nodes

Abstract

A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Claims

1-17. -17. (canceled)

18. A method of generating a forward link frame in a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the method comprising:

generating secondary synchronization signals for identifying a cell group;

generating a primary synchronization signal for identifying a cell in the cell group corresponding to the secondary synchronization signals; and

generating the forward link frame using the secondary synchronization signals and the primary synchronization signal,

wherein the primary synchronization signal is repeatedly disposed on at least two symbols and the secondary synchronization signals are disposed on at least two symbols, respectively,

wherein the secondary synchronization signals disposed on the different symbols are different sequences from each other and the secondary synchronization signals provide timing information of the start of the forward link frame.

19. The method of claim 18, wherein each cell belongs to only one of the plurality of cell groups.

20. The method of claim 18, wherein the forward link frame comprises a plurality of symbols in a time domain, and

the primary synchronization signal and each of the secondary synchronization signals are mapped to two adjacent symbols.

21. The method of claim 18, wherein the primary synchronization signal provides symbol timing information.

22. An apparatus for generating a forward link frame in a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the apparatus comprising:

means for generating secondary synchronization signals for identifying a cell group;

means for generating a primary synchronization signal for identifying a cell in the cell group corresponding to the secondary synchronization signals; and

means for generating the forward link frame using the secondary synchronization signals and the primary synchronization signal,

wherein the primary synchronization signal is repeatedly disposed on at least two symbols and the secondary synchronization signals are disposed on at least two symbols, respectively,

wherein the secondary synchronization signals disposed on the different symbols are different sequences from each other and the secondary synchronization signals provide timing information of the start of the forward link frame.

23. The apparatus of claim 22, wherein each cell belongs to only one of the plurality of cell groups.

24. The apparatus of claim 22, wherein the forward link frame comprises a plurality of symbols in a time domain, and

the primary synchronization signal and each of the secondary synchronization signals are mapped to two adjacent symbols.

25. The apparatus of claim 22, wherein the primary synchronization signal provides symbol timing information.

26. A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the method comprising:

detecting secondary synchronization signals and a primary synchronization signal from a received signal;

identifying a cell ID using the secondary synchronization signals and the primary synchronization signal; and

identifying timing information of the start of a forward link frame based on the secondary synchronization signals,

wherein the secondary synchronization signals include information of cell group to which the mobile station belongs, and the primary synchronization signal includes information of a cell to which the mobile station belongs among a plurality of cells within the cell group,

wherein the primary synchronization signal is repeatedly disposed on at least two symbols and the secondary synchronization signals are disposed on at least two symbols, respectively,

wherein the secondary synchronization signals disposed on the different symbols are different sequences from each other .

27. The method of claim 26, wherein each cell belongs to only one of the plurality of cell groups.

28. The method of claim 26, wherein a frame of the received signal comprises a plurality of symbols in a time domain, and

the primary synchronization signal and each of the secondary synchronization signals are mapped to two adjacent symbols.

29. The method of claim 26, wherein the primary synchronization signal includes symbol timing information.

30. An apparatus for searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells, the apparatus comprising:

means for detecting secondary synchronization signals and a primary synchronization signal from a received signal;

means for identifying a cell ID using information of the secondary synchronization signals and the primary synchronization signal; and

means for identifying timing information of the start of the forward link frame based on the secondary synchronization signals,

wherein the secondary synchronization signals include information of cell group to which the mobile station belongs, and the primary synchronization signal includes information of a cell to which the mobile station belongs among a plurality of cells within the cell group,

wherein the primary synchronization signal is repeatedly disposed on at least two symbols and the secondary synchronization signals are disposed on at least two symbols, respectively,

wherein the secondary synchronization signals disposed on the different symbols are different sequences from each other.

31. The apparatus of claim 30, wherein each cell belongs to only one of the plurality of cell groups.

32. The apparatus of claim 30, wherein a frame of the received signal comprises a plurality of symbols in a time domain, and

the primary synchronization signal and each of the secondary synchronization signals are mapped to two adjacent symbols.

33. The apparatus of claim 30, wherein the primary synchronization signal includes symbol timing information.