| Patent application number | Description | Published |
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| 20090252333 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a group to which the first short sequence belongs, the wireless communication system using a plurality of short sequences and the plurality of short sequence being divided into a plurality of groups; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain. | 10-08-2009 |
| 20090252334 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; and mapping the secondary synchronization signal that includes the scrambled first short sequence and the scrambled second short sequence to a frequency domain. | 10-08-2009 |
| 20090252335 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; scrambling the second short sequence with the first scrambling sequence and scrambling the first short sequence with the second scrambling sequence and the fourth scrambling sequence; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain. | 10-08-2009 |
| 20090252336 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by a short sequence group-a wireless communication system uses a plurality of short sequences and the plurality of short sequences are grouped into a plurality of short sequence group-to which the first short sequence is assigned; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; and mapping the secondary synchronization signal that includes the scrambled first short sequence and the scrambled second short sequence to a frequency domain. | 10-08-2009 |
| 20100074199 | APPARATUS AND METHOD OF DISCOVERING NEIGHBOR CELL - A method of discovering a neighbor cell, the method including: determining whether a first Primary Synchronization Channel (PSCH) of a first cell in which a terminal is included is identical to a second PSCH of a second cell, and whether timings of the first cell and the second cell are synchronous; estimating third channel information of the second cell based on second channel information of the first cell from first channel information, when the first PSCH is identical to the second PSCH and the timings of the first cell and the second cell are synchronous, the second channel information being estimated using a first Secondary Synchronization Channel (SSCH) of the first cell, and the first channel information being estimated using the first PSCH and the second PSCH; and detecting a second SSCH of the second cell, and detecting a cell identifier (ID) of the second cell using the second SSCH. | 03-25-2010 |
| 20100075672 | MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM WHICH ADAPTIVELY DETERMINES DOWNLINK TRANSMISSION MODE - An operation method of a base station which adaptively determines a downlink transmission mode is provided. The operation method of the base station including: adaptively determining a downlink transmission mode based on at least one of a state of a channel between the base station and a terminal, and a number of receiving antennas, the number of receiving antennas being at least one and the receiving antennas being mounted on the terminal; selecting one of at least one type of feedback information which is fed back by the terminal based on the determined downlink transmission mode; and reporting type information associated with the selected type to the terminal. | 03-25-2010 |
| 20100150217 | CHANNEL ESTIMATION APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM HAVING DISPERSED PILOT - Provided are a channel estimation method and apparatus in mobile communication system having dispersed pilot. The channel estimation apparatus includes an entire band channel estimation unit and an edge channel estimation unit. The entire band channel estimation unit performs channel estimation on an entire frequency band. The edge channel estimation unit performs channel estimation on an edge region. By separately performing the gating operation of the entire band channel estimation unit and the gating operation of the edge channel estimation unit, a channel frequency response is more accurately calculated even in an edge region. | 06-17-2010 |
| 20110142142 | APPARATUS AND METHOD FOR ESTIMATING CHANNEL IN CHANNEL DOMAIN - A method and apparatus for estimating a channel in a frequency domain are provided. The apparatus acquires frequency selectivity information using a cell-specific reference signal, selects a channel estimation scheme using a user specific reference signal according to the acquired frequency selectivity information, and estimates a frequency channel using the selected channel estimation scheme. Accordingly, more accurate channel estimation with respect to a region to which a physical downstream shared channel is allocated can be performed. | 06-16-2011 |
| 20110142157 | INTERLEAVING APPARATUS FOR IMPROVING TRANSMISSION PERFORMANCE AND INTERLEAVING METHOD USED BY THE INTERLEAVING APPARATUS - Provided are an interleaving apparatus for improving transmission performance and an interleaving method used by the interleaving apparatus. The interleaving apparatus determines the type of data at each element position of an interleaving matrix, reads encoded data, which corresponds to the determined type of data at each element position, from an encoder, rearranges the read data in an order determined by the interleaving matrix, and outputs the rearranged data. Since the interleaving apparatus does not include a memory, it can prevent delay in signal processing, thereby improving transmission performance. | 06-16-2011 |
| 20110143757 | APPARATUS AND METHOD FOR PROVIDING GROUP SERVICE IN WIRELESS COMMUNICATION SYSTEM - A group service providing method and apparatus suitable for use in a wireless communication system. A group registration method for providing a group service to a master terminal and a slave terminal, the group registration method may comprise receiving and storing subscriber profile information of the master terminal from an associated communication network server in response to a group service registration request from the master terminal; generating a group related to the group service registration request and a group key corresponding to the generated group and transmitting to the master terminal a group generation completion message including the group key; receiving and storing subscriber profile information of the slave terminal dependent on the master terminal from the communication network server; and transmitting the group key to the slave terminal with reference to the subscriber profile information of the slave terminal. | 06-16-2011 |
| 20110145311 | METHOD AND APPARATUS FOR MODULO N OPERATION - A method and apparatus for a modulo N operation are provided. The method for a modulo N operation on a positive integer X includes converting the positive integer X into a binary number, determining whether a modulo N is expressed by a product of 2 to the m | 06-16-2011 |
| Patent application number | Description | Published |
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| 20090161652 | APPARATUS FOR GENERATING DOWN LINK SIGNAL, AND METHOD AND APPARATUS FOR CELL SEARCH IN CELLULAR SYSTEM - The invention provides a method of generating a downlink signal and searching a cell on the basis of the downlink signal in an OFDM-based cellular system. The downlink signal includes a plurality of synchronization blocks each having a plurality of sub-frames, and a synchronization pattern composed of a combination of a cell group identification code for identifying a cell group and a frame synchronization identification code for indicating a frame start point is generated in each of the synchronization blocks. Different frame synchronization identification codes are allocated to the synchronization blocks. | 06-25-2009 |
| 20090232125 | CELL SEARCH METHOD, FORWARD LINK FRAME TRANSMISSION METHOD, APPARATUS USING THE SAME AND FORWARD LINK FRAME STRUCTURE - 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. | 09-17-2009 |
| 20090279513 | METHOD FOR TRANSMITTING SIGNAL AND METHOD FOR RECEIVING SIGNAL - A sector transmitter maps a synchronization channel and a broadcast channel to be on a time axis adjacent to each other, and applies the same bandwidth and the same transmission diversity to the synchronization channel and the broadcast channel. A mobile station estimates a plurality of channel statuses for a plurality of sectors from a synchronization channel signal, and acquires broadcast channel information from a broadcast channel signal using the plurality of estimated channel statuses. As a result, the mobile station can receive a broadcast channel with high reception quality while having low complexity. | 11-12-2009 |
| 20100074448 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL - A signal transmitting method according to an exemplary embodiment of the present invention includes channel-coding broadcasting channel information by using a first scrambling code in a first frame within a broadcasting channel information updating period including a plurality of frames, and channel-coding the broadcasting channel information by using a second scrambling code in a second frame within the broadcasting channel information updating period. The second scrambling code is different from the first scrambling code. | 03-25-2010 |
| 20100086129 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL - A signal transmitting method according to an exemplary embodiment of the present invention includes channel-coding broadcasting channel information by using a first scrambling code in a first frame within a broadcasting channel information updating period including a plurality of frames, and channel-coding the broadcasting channel information by using a second scrambling code in a second frame within the broadcasting channel information updating period. The second scrambling code is different from the first scrambling code. | 04-08-2010 |
| 20110044256 | METHOD FOR GENERATING DOWNLINK SIGNAL, AND METHOD FOR SEARCHING CELL - An apparatus for generating a downlink signal and a cell search apparatus are disclosed. An apparatus for generating a downlink signal generates a downlink signal by one unique cell identification code group and a plurality of frame synchronization identification sequences, generates a downlink signal by a plurality of unique cell identification code groups and a plurality of frame synchronization identification sequences, or generates a downlink signal by a plurality of unique cell identification code groups and one frame synchronization identification sequence. A cell search apparatus obtains frame synchronization and identifies cells through a frame synchronization identification sequence and a unique cell identification code group. | 02-24-2011 |
| 20110149947 | CELL SEARCH METHOD, FORWARD LINK FRAME TRANSMISSION METHOD, APPARATUS USING THE SAME AND FORWARD LINK FRAME STRUCTURE - 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. | 06-23-2011 |
| Patent application number | Description | Published |
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| 20090252332 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a first short sequence and a third scrambling sequence determined by a second short sequence; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; scrambling the second short sequence with the first scrambling sequence; scrambling the first short sequence with at least the third scrambling sequence; and mapping one second synchronization signal including the first short sequence scrambled with the first scrambling sequence and the second short sequence scrambled with at least the second scrambling sequence and another second synchronization signal including the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled with at least the third scrambling sequence in the frequency domain. | 10-08-2009 |
| 20100182976 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEMS - When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block. | 07-22-2010 |
| 20110085495 | METHOD AND APPARATUS FOR FORMING SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - Provided is method of forming a signal in a wireless communication system in which a plurality of terminals commonly use a resource in the time domain and the frequency domain. The method includes multiplying a signal to be transmitted by a frequency domain orthogonal code symbol corresponding to a first cyclic shift index in a first slot to be transmitted to a base station, wherein the multiplying is performed by a first terminal and a second terminal; and multiplying information to be transmitted by a frequency domain orthogonal code symbol corresponding to a second cyclic index that is different from the first cyclic index of the first slot to be transmitted to the base station, in a second slot, wherein the multiplying is performed by the first terminal and the second terminal. | 04-14-2011 |
