IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0226371
(2005-09-15)
|
등록번호 |
US-7599309
(2009-10-20)
|
우선권정보 |
KR-10-2004-0074537(2004-09-17) |
발명자
/ 주소 |
- Suk, Won Kyu
- Rim, Jung Hwan
- Kim, Joo Kwang
|
출원인 / 주소 |
- Samsung Electronics Co., Ltd.
|
대리인 / 주소 |
Roylance, Abrams, Berdo & Goodman, L.L.P.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
20 |
초록
▼
A method and an apparatus are provided for managing cell-by-cell demodulation timing of an asynchronous user equipment (UE) for demodulating multipath signals, received from a plurality of cells, in a plurality of fingers. Mapping information, indicating fingers mapped on a cell-by-cell basis, and d
A method and an apparatus are provided for managing cell-by-cell demodulation timing of an asynchronous user equipment (UE) for demodulating multipath signals, received from a plurality of cells, in a plurality of fingers. Mapping information, indicating fingers mapped on a cell-by-cell basis, and demodulation information and demodulation timing information for the plurality of cells are acquired. The fingers are grouped on a cell-by-cell basis according to the mapping information. Demodulation information for an associated cell is provided to each of the grouped fingers. A signal received from the associated cell is demodulated in the grouped fingers by using the demodulation information for the associated cell. System load and costs can be reduced by managing demodulation timings on a cell-by-cell basis in the UE that simultaneously perform data transmission/reception with the cells in which transmission timings are different from each other in a soft handover situation in an asynchronous mobile telecommunication system.
대표청구항
▼
What is claimed is: 1. A method for managing cell-by-cell demodulation timings of an asynchronous user equipment (UE) for demodulating multipath signals, received from a plurality of cells, in a plurality of fingers, the method comprising the steps of: acquiring mapping information, indicating the
What is claimed is: 1. A method for managing cell-by-cell demodulation timings of an asynchronous user equipment (UE) for demodulating multipath signals, received from a plurality of cells, in a plurality of fingers, the method comprising the steps of: acquiring mapping information, indicating the plurality of fingers mapped on a cell-by-cell basis, and demodulation information and demodulation timing information managed on the cell-by-cell basis for the plurality of cells; grouping the plurality of fingers on the cell-by-cell basis according to the mapping information; providing demodulation information for an associated cell to each of the grouped fingers on the cell-by-cell basis; demodulating a signal received from the associated cell in the grouped fingers using the demodulation information for the associated cell; and managing the cell-by-cell demodulation timings of the grouped fingers according to the demodulation timing information using a system frame number (SFN) and a connection frame number (CFN). 2. The method of claim 1, wherein the demodulation information comprises scrambling codes, channel offsets, and diversity modes indicating demodulation schemes associated with the cells. 3. The method of claim 2, wherein the step of providing the demodulation information comprises the steps of: establishing the scrambling codes in the grouped fingers on the cell-by-cell basis; establishing the channel offsets in the grouped fingers on the cell-by-cell basis; and establishing the diversity modes in the grouped fingers on the cell-by-cell basis. 4. The method of claim 1, wherein the demodulation timing information comprises cell-by-cell SFN information, reference cell information indicating a reference cell of the cells, and cell-by-cell reference finger information indicating reference fingers of the fingers mapped to the cells. 5. The method of claim 4, wherein the step of managing the cell-by-cell demodulation timings comprises the steps of: managing the SFN value of an associated cell according to the cell-by-cell SFN information such that the SFN value is synchronized with synchronization timing information of a reference finger of the associated cell according to the cell-by-cell reference finger information; selecting the managed SFN value of the reference cell according to the reference cell information; and managing the CFN of the UE such that the CFN is synchronized with the selected SFN value, and generating a demodulation reference signal, indicating demodulation timing of the fingers, corresponding to the managed CFN value. 6. An apparatus for managing cell-by-cell demodulation timings of an asynchronous user equipment (UE) for demodulating multipath signals received from a plurality of cells, the apparatus comprising: a RAKE receiver configured by a plurality of fingers; a cell management control unit for acquiring mapping information, indicating the plurality of fingers mapped on a cell-by-cell basis, and demodulation information and demodulation timing information managed on the cell-by-cell basis for the plurality of cells, grouping the plurality of fingers on the cell-by-cell basis according to the mapping information, and providing demodulation information for an associated cell to each of the grouped fingers on the cell-by-cell basis; and a demodulation timing management unit for managing cell-by-cell demodulation timings of the grouped fingers according to the demodulation timing information using a system frame number (SFN) and a connection frame number (CFN). 7. The apparatus of claim 6, wherein the demodulation information comprises scrambling codes, channel offsets, and diversity modes indicating demodulation schemes associated with the cells. 8. The apparatus of claim 7, wherein the cell management control unit establishes the scrambling codes in the grouped fingers on the cell-by-cell basis, establishes the channel offsets in the grouped fingers on the cell-by-cell basis, and establishes the diversity modes in the grouped fingers on the cell-by-cell basis. 9. The apparatus of claim 6, wherein the demodulation timing information comprises cell-by-cell SFN information, reference cell information indicating a reference cell of the cells, and cell-by-cell reference finger information indicating reference fingers of the fingers mapped to the cells. 10. The apparatus of claim 9, wherein the demodulation timing management unit comprises: a plurality of first multiplexers for selecting synchronization timings of reference fingers for the plurality of cells according to the cell-by-cell reference finger information; cell-by-cell SFN timing management counters for managing SFN values for the plurality of cells according to the cell-by-cell SFN information such that the SFN values are synchronized with the synchronization timings of the reference fingers selected by the plurality of first multiplexers; a second multiplexer for selecting the SFN value of the reference cell according to the reference cell information from the SFN values managed by the cell-by-cell SFN timing management counters; and the CFN timing management counter for managing a CFN of the UE such that the CFN is synchronized with the SFN value selected by the second multiplexer, and generating a demodulation reference signal, indicating demodulation timing of the fingers, corresponding to the managed CFN value.
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