BASE STATION DEVICE AND MOBILE STATION DEVICE
First Claim
1. A base station apparatus that performs multicarrier communication, comprising:
- a frame forming section that forms a frame by mapping a frame synchronization sequence used for frame timing identification and a TTI synchronization sequence used for TTI timing identification such that the frame synchronization sequence and the TTI synchronization sequence do not overlap with each other in same symbols specified by frequency and time; and
a transmitting section that transmits said frame,wherein said frame forming section maps said frame synchronization sequence at a predetermined position from a frame starting symbol, and maps said TTI synchronization sequence at a predetermined position from a TTI starting symbol.
2 Assignments
0 Petitions
Accused Products
Abstract
There are provided a base station device and a mobile station device for increasing the speed of cell search by introducing identification of TTI timing into the cell search. In the base station device (100), a frame configuration unit (120) forms a frame by arranging a TTI synchronization sequence (SCH1 sequence) used for identifying the frame timing and a TTI synchronization sequence (SCH2 sequence) used for identifying the TTI timing in such a manner that they are not superimposed on the same symbol specified by the frequency and the time. A radio transmission unit (145) sends the frame. The frame configuration unit (120) arranges the frame synchronization sequence at a predetermined position from the frame starting symbol and the TTI synchronization sequence at a predetermined position from the TTI starting symbol. The mobile station device (200) receiving the frame detects the TTI timing by using the TTI synchronization sequence.
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Citations
32 Claims
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1. A base station apparatus that performs multicarrier communication, comprising:
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a frame forming section that forms a frame by mapping a frame synchronization sequence used for frame timing identification and a TTI synchronization sequence used for TTI timing identification such that the frame synchronization sequence and the TTI synchronization sequence do not overlap with each other in same symbols specified by frequency and time; and a transmitting section that transmits said frame, wherein said frame forming section maps said frame synchronization sequence at a predetermined position from a frame starting symbol, and maps said TTI synchronization sequence at a predetermined position from a TTI starting symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A base station apparatus that performs multicarrier communication, comprising:
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a frame forming section that forms a frame by mapping a synchronization sequence for performing synchronization in a frequency domain in a starting symbol and a predetermined symbol of each TTI in each subcarrier; and a transmitting section that transmits said frame, wherein said frame forming section maps said synchronization sequence, changing a position of said predetermined symbol between said frame starting TTI and a TTI other than said starting TTI. - View Dependent Claims (12, 13, 14, 15)
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16. A mobile station apparatus that performs a cell search based on a frame transmitted from a base station apparatus, comprising:
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a receiving section that receives a frame in which a frame synchronization sequence used for frame timing identification is mapped at a predetermined position from a frame starting symbol and a TTI synchronization sequence used for TTI timing identification is mapped at a predetermined position from a TTI starting symbol, and said frame synchronization sequence and said TTI synchronization sequence are mapped such that the frame synchronization sequence and the TTI synchronization sequence do not overlap with each other in same symbols specified by frequency and time; a correlation section that calculates correlations by sequentially multiplying all said frame synchronization sequence and said TTI synchronization sequence candidates by said frame; and a detection section that detects said frame timing and said TTI timing based on a correlation value calculated by said correlation section. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A mobile station apparatus that performs a cell search based on a frame transmitted from a base station apparatus, comprising:
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a receiving section that receives a frame in which a synchronization sequence for performing synchronization is mapped in a frequency domain in a starting symbol and a predetermined symbol of each TTI in each subcarrier, and a position of said predetermined symbol differs between a starting TTI and a TTI other than that starting TTI; a correlation section 1110 that extracts a symbol in each subcarrier at TTI intervals from said frame, and performs the frequency domain multiplication of said synchronization sequence by extracted said symbol and calculates a correlation; and a detection section that detects TTI timing based on a correlation value calculated by said correlation section, and outputs TTI timing information to said correlation section, wherein; said correlation section multiplies said predetermined symbol by said synchronization sequence in accordance with said TTI timing information and calculates a correlation; and said detection section identifies said starting TTI and a TTI other than that starting TTI based on a correlation value between said predetermined symbol and said synchronization sequence. - View Dependent Claims (31, 32)
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Specification