Method and apparatus for transmitting and receiving common channel in a cellular wireless communication system supporting scalable bandwidth
First Claim
1. A method for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the method comprising:
- determining a system bandwidth of a cell by comparing a reception bandwidth of User Equipments (UEs) located in the cell with the system bandwidth;
mapping a first synchronous channel (SCH) sequence to a central band of a system band, which has a system bandwidth which is greater than or equal to a minimum bandwidth required for detecting an SCH;
additionally mapping second SCH sequences to bands having the minimum bandwidth, each of which is spaced from the central band by a predetermined interval, if the system bandwidth is greater than twice the reception bandwidth; and
transmitting a signal in a Frequency domain to which at least one of the first SCH sequence and the second SCH sequences is mapped, to the UEs located in the cell.
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Accused Products
Abstract
A method is provided for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology. The transmission method includes determining a system bandwidth of a cell by comparing a reception bandwidth of User Equipments (UEs) located in the cell with the system bandwidth; mapping a first synchronous channel (SCH) sequence to a central band of a system band, which has a bandwidth which is greater than or equal to a minimum bandwidth required for detecting an SCH; if the system bandwidth is greater than twice the reception bandwidth, additionally mapping second SCH sequences to bands having the minimum bandwidth, each of which is spaced from the central band by a predetermined interval; and transmitting to the UEs located in the cell a signal in the frequency domain to which at least one of the first SCH sequence and the second SCH sequences is mapped.
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Citations
56 Claims
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1. A method for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the method comprising:
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determining a system bandwidth of a cell by comparing a reception bandwidth of User Equipments (UEs) located in the cell with the system bandwidth;
mapping a first synchronous channel (SCH) sequence to a central band of a system band, which has a system bandwidth which is greater than or equal to a minimum bandwidth required for detecting an SCH;
additionally mapping second SCH sequences to bands having the minimum bandwidth, each of which is spaced from the central band by a predetermined interval, if the system bandwidth is greater than twice the reception bandwidth; and
transmitting a signal in a Frequency domain to which at least one of the first SCH sequence and the second SCH sequences is mapped, to the UEs located in the cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for receiving a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the method comprising:
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receiving a first synchronous channel (SCH) signal through the central band of the system band, which has a bandwidth that is greater than or equal to a minimum bandwidth required for detecting an SCH, if a system bandwidth of a cell where a User Equipment (UE) is currently located, is less than twice a reception bandwidth of the UE or the UE is camping in a central reception band of the system band, which has the reception bandwidth;
receiving a second SCH signal through a band that is spaced from the central band of the system band by a predetermined interval and has the minimum bandwidth, if the system bandwidth is greater than or equal to twice the reception bandwidth and the UE is camping in an upper or lower band which is a part of the system band; and
acquiring an SCH sequence from any one of the first and second SCH signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the apparatus comprising:
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a controller for determining a system bandwidth of a cell by comparing a reception bandwidth of User Equipments (UEs) located in the cell with the system bandwidth;
a synchronous channel (SCH) subcarrier symbol generator for generating a first and in the alternative a second SCH sequence composed of a plurality of SCH subcarrier symbols according to the system bandwidth;
a subcarrier symbol mapper for mapping the first SCH sequence to a central band of the system band, which has a bandwidth that is greater than or equal to a minimum bandwidth required for detecting an SCH, and additionally mapping second SCH sequences to bands that are spaced from the central band and have the minimum bandwidth, if the system bandwidth is greater than twice the reception bandwidth; and
an Inverse Fast Fourier Transform (IFFT) unit for transmitting a signal in a frequency domain to which at least one of the first SCH sequence and the second SCH sequences is mapped, to the UEs located in the cell. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An apparatus for receiving a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the apparatus comprising:
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a Radio Frequency (RF) unit for receiving a radio signal in a reception band where a User Equipment (UE) is camping;
a frequency converter for down-converting the radio signal into an intermediate frequency (IF) or a baseband signal;
a reception filter controller for determining a system bandwidth of a cell where the UE is currently located, by comparing a reception bandwidth of the UE with the system bandwidth;
a band-limited filter for receiving a first synchronous channel (SCH) signal through the central band of the system band, which has a bandwidth that is greater than or equal to a minimum bandwidth required for detecting an SCH, if the system bandwidth is less than twice the reception bandwidth or the UE is camping in a central reception band of the system band, which has the reception bandwidth, , and receiving a second SCH signal through a band that is spaced from the central band of the system band and has the minimum bandwidth, by filtering the down-converted signal, if the system bandwidth is greater than or equal to twice the reception bandwidth and the UE is camping in an upper or lower band which is a part of the system band; and
a cell searcher for acquiring an SCH sequence from any one of the first and second SCH signals, and performing cell search using the SCH sequence. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A method for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the method comprising:
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determining a system bandwidth of a cell by comparing a reception bandwidth of User Equipments (UEs) located in the cell with the system bandwidth;
repeating and mapping a Paging Channel (PCH) message for paging a UE in an idle mode in two bands, each of which is adjacent to a center frequency of the system band and has a maximum PCH bandwidth required for transmitting a PCH message for paging a UE in an idle mode, if the system bandwidth is greater than or equal to twice the reception bandwidth; and
transmitting a signal in a frequency domain to which the PCH message is mapped, to UEs located in the cell. - View Dependent Claims (46, 47)
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48. A method for receiving a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the method comprising:
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determining a system bandwidth of a cell where a User Equipment (UE) is currently located, by comparing its reception bandwidth with the system bandwidth;
receiving a Paging Channel (PCH) for paging a UE in an idle mode in any one of two bands, each of which is adjacent to a center frequency of the system band and has a maximum PCH bandwidth required for transmitting a PCH message for paging a UE in an idle mode, if the system bandwidth is greater than or equal to twice the reception bandwidth. - View Dependent Claims (49, 50)
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51. An apparatus for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the apparatus comprising:
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a controller for determining a system bandwidth of a cell by comparing a reception bandwidth of User Equipments (UEs) located in the cell with the system bandwidth;
a subcarrier symbol mapper for repeating and mapping a Paging Channel (PCH) message for paging a UE in an idle mode in two bands, each of which is adjacent to a center frequency of the system band and has a maximum PCH bandwidth required for transmitting a PCH message for paging a UE in an idle mode, if the system bandwidth is greater than or equal to twice the reception bandwidth; and
an Inverse Fast Fourier Transform (IFFT) unit for transmitting a signal in a frequency domain to which the PCH message is mapped, to UEs located in the cell. - View Dependent Claims (52, 53)
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54. An apparatus for receiving a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the apparatus comprising:
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a Radio Frequency (RF) unit for receiving a radio signal in a reception band where a User Equipment (UE) is camping;
a frequency converter for down-converting the radio signal into an intermediate frequency (IF) or a baseband signal;
a controller for determining a system bandwidth of a cell where the UE is currently located, by comparing its reception bandwidth with the system bandwidth; and
a band-limited filter for receiving a Paging Channel (PCH) for paging a UE in an idle mode in any one of two bands, each of which is adjacent to a center frequency of the system band and has a maximum PCH bandwidth required for transmitting a PCH message for paging a UE in an idle mode, if the system bandwidth is greater than or equal to twice the reception bandwidth. - View Dependent Claims (55, 56)
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Specification