Abstract
In a cellular system in which OFDM is used a forward link synchronization channel a common pilot channel structure an initial cell searching method of a mobile station and an adjacent cell searching method for handover are required. A method of transmitting a forward synchronization signal in a wireless communication system according to the present invention includes generating a frame comprised of a plurality of sync blocks; and transmitting the frame through a forward link wherein the frame comprises primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences Therefore the cell searching time can be efficiently reduced in an OFDM system.
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Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
4G | 03/02/2009 | ISLD-200903-003 | ETRI |
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5G | 05/01/2020 | ISLD-201912-077 | ETRI |
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Specification Information
Specification Information
Technologies
Family Information
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies

Product

Use Cases

Services

Claim
1. A method of transmitting a forward synchronization signal in a wireless communication system, the method comprising: generating a frame comprisingof a plurality of sync blocks; and transmitting the frame through a forward link, wherein the frame comprises primary a synchronization channel sequence which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame, wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences.
2. The method of Claim 1 , wherein the hopping code word selects a part of the cell identifiers used in the wireless communication system and the primary synchronization channel sequence specify one cell identifier from among the part of the cell identifiers selected by the hopping code word.
3. The method of Claim 1 , wherein multiplication of the number of primary synchronization channel sequences and the number of the hopping code words is the same as the number of the cell identifiers used in the wireless communication system.
4. The method of Claim 1 , wherein the primary synchronization channel sequence is selected from the plurality of the primary synchronization channel sequences used in the wireless communication system.
5. The method of Claim 1 , wherein the primary synchronization channel sequence is repeatedly located at the same position in each of the sync blocks in the frame.
6. The method of Claim 1 , wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a TDM method in adjacent symbol sections in the frame.
7. The method of Claim 1 , wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a FDM method in the same symbol section in the frame.
8. A method of transmitting a forward synchronization signal in a wireless communication system, the method comprising: generating a frame comprised of a plurality of sync blocks; and transmitting the frame through a forward link, wherein the frame comprises primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame and the plurality of the secondary synchronization channel sequences specify hopping code words that are one-to-one mapped to cell identifiers.
9. The method of Claim 8, wherein the primary synchronization channel sequence is selected from the plurality of the primary synchronization channel sequences used in the wireless communication system and selects a part of the cell identifiers used in the wireless communication system
10. The method of Claim 8, wherein the primary synchronization channel sequences are repeatedly located at the same position in each of the sync blocks in the frame
11. The method of Claim 8, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a TDM method in adjacent symbol sections in the frame
12. The method of Claim 8, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a FDM method in the same symbol section in the frame
13. A method of detecting cell identifiers by using a forward synchronization signal in a wireless communication system, the method comprising: receiving a frame comprised of a plurality of sync blocks; extracting a sync block timing from primary synchronization channel sequence included in the frame, frame timing from a plurality of secondary synchronization channel sequences included in the frame, and a hopping code word specified by the plurality of the secondary synchronization channel sequences; and detecting the cell identifier by combination of the primary synchronization channel sequence and the hopping code word
14. The method of Claim 13, wherein the hopping code word is used to select a part of the cell identifiers used in the wireless communication system and the primary synchronization channel sequence is used to detect one cell identifier from among the part of the cell identifiers selected by the hopping code word
15. The method of Claim 13, wherein all primary synchronization channel sequences and all hopping code words used in the wireless communication system are used to detect the cell identifiers that are of the same number as a multiple of the number of primary synchronization channel sequences and the number of hopping code words
16. The method of Claim 13, wherein the primary synchronization channel sequence selected from a plurality of the primary synchronization channel sequences used in the wireless communication system are used to detect the cell identifier
17. An apparatus for transmitting a forward synchronization signal in a wireless communication system, the apparatus comprising: a frame generating unit generates a frame comprised of a plurality of the sync blocks, wherein the frame comprising primary synchronization channel sequences which provide timing information of sync blocks and a plurality of secondary synchronization channel sequences which provides timing information of the frame, wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences; and a frame transmitting unit transmits the frame through a forward link
18. The apparatus of Claim 17, wherein the hopping code word selects a part of the cell identifiers used in the wireless communication system and the primary synchronization channel sequence specifies one cell identifier from among the part of the cell identifiers selected by the hopping code word
19. The apparatus of Claim 17, wherein multiplication of the number of primary synchronization channel sequences and the number of hopping code words is the same as the number of cell identifiers used in the wireless communication system.
20. The apparatus of Claim 17, wherein the primary synchronization channel sequence is selected from the plurality of the primary synchronization channel sequences used in the wireless communication system.
21. The apparatus of Claim 17, wherein the primary synchronization channel sequence is repeatedly located at the same position in each of the sync blocks in the frame.
22. The apparatus of Claim 17, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a TDM method in adjacent symbol sections in the frame.
23. The apparatus of Claim 17, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a FDM method in the same symbol section in the frame.
24. An apparatus for transmitting a forward synchronization signal in a wireless communication system, the apparatus comprising: a frame generating unit generates a frame comprised of a plurality of the sync blocks, wherein the frame comprising primary synchronization channel sequences which provide timing information of sync blocks and a plurality of secondary synchronization channel sequences which provide timing informationof the frame, wherein the plurality of secondary synchronization channel sequences specify hopping code words that are one-to-one mapped to cell identifiers; and a frame transmitting unit transmits the frame through a forward link.
25. The apparatus of Claim 24, wherein the primary synchronization channel sequence is selected from the plurality of the primary synchronization channel sequences used in the wireless communication system and selects a part of the cell identifiers used in the wireless communication system.
26. The apparatus of Claim 24, wherein the primary synchronization channel sequence is repeatedly located at the same position in each of the sync blocks in the frame.
27. The apparatus of Claim 24, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a TDM method in adjacent symbol sections in the frame.
28. The apparatus of Claim 24, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a FDM method in the same symbol section in the frame.
29. An apparatus of detecting cell identifiers using a forward synchronization signal in a wireless communication system, the apparatus comprising: a frame receiving unit which receives a frame comprised of a plurality of sync blocks; wherein a sync block timing is extracted from primary synchronization channel sequence included in the frame and a frame timing is extracted from a plurality of secondary synchronization channel sequences included in the frame, wherein a cell identifier is detected by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences.
30. The apparatus of Claim 29, wherein the hopping code word is used to specify a part of the cell identifiers used in the wireless communication system and the primary synchronization channel sequence is used to detect one cell identifier from among the part of the cell identifiers specified by the hopping code word.
31. The apparatus of Claim 29, wherein the primary synchronization channel sequence and the hopping code word used in the wireless communication system are used to detect the cell identifiers that are of the same number as a multiple of the number of primary synchronization channel sequences and the number of hopping code words.
32. The apparatus of Claim 29, wherein the primary synchronization channel sequence selected from a plurality of the primary synchronization channel sequences used in the wireless communication system is used to detect the cell identifier.
33. A forward link frame formed of a plurality of sync blocks used as a forward synchronization signal in a wireless communication system, the forward link frame comprising: primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame, wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences.
34. The forward link frame of Claim 33, wherein the hopping code word is used to specify a part of the cell identifiers used in the wireless communication system and the primary synchronization channel sequence is used to detect one cell identifier from among the part of the cell identifiers specified by the hopping code word.
35. The forward link frame of Claim 33, wherein multiplication of the number of primary synchronization channel sequences and the number of hopping code words is the same as the number of cell identifiers used in the wireless communication system.
36. The forward link frame of Claim 33, wherein the primary synchronization channel sequence is selected from the plurality of the primary synchronization channel sequences used in the wireless communication system.
37. The forward link frame of Claim 33, wherein the primary synchronization channel sequence is repeatedly located at the same position in each of the sync blocks in the frame.
38. The forward link frame of Claim 33, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a TDM method in adjacent symbol sections in the frame.
39. The forward link frame of Claim 33, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a FDM method in the same symbol section in the frame.
40. A forward link frame formed of a plurality of sync blocks used as a forward synchronization signal in a wireless communication system comprising: primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame, wherein the plurality of secondary synchronization channel sequences specify hopping code words that are one-to-one mapped to cell identifiers.
41. The forward link frame of Claim 40, wherein the primary synchronization channel sequence is selected from the plurality of the primary synchronization channel sequences used in the wireless communication system and selects a part of the cell identifiers used in the wireless communication system.
42. The forward link frame of Claim 40, wherein the primary synchronization channel sequence is repeatedly located at the same position in each of the sync blocks in the frame.
43. The forward link frame of Claim 40, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a TDM method in adjacent symbol sections in the frame.
44. The forward link frame of Claim 40, wherein the primary synchronization channel sequences and the secondary synchronization channel sequences are located by a FDM method in the same symbol section in the frame.
45. A computer readable recording medium having embodied thereon a computer program for executing the method of Claims 1.
46. A computer readable recording medium having embodied thereon a computer program for executing the method of Claims 13.']
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SUMMARY
ClaimChart-WO2008013404A1-STO
Patent number:WO2008013404A1
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.