Patent application number | Description | Published |
20080290919 | CLOCK GENERATOR FOR SEMICONDUCTOR MEMORY APPARATUS - The clock generator for semiconductor memory apparatus which includes: a first divider configured to divide a frequency of a first internal clock generated by using an external clock; a first delay unit configured to delay an output of the first divider by first delay time; a second divider configured to divide a frequency of an output of the first delay unit; a second delay unit configured to delay the output of the second divider by second delay time; a phase comparator configured to compare a phase of the output of the first divider with a phase of the output of the second delay unit and output a result of the comparison; and a delay time setting unit configured to set the first delay time on the basis of the output of the phase comparator. | 11-27-2008 |
20080291759 | APPARATUS AND METHOD OF GENERATING OUTPUT ENABLE SIGNAL FOR SEMICONDUCTOR MEMORY APPARATUS - A timing signal generator generates a timing signal when an external clock is synchronized with a predetermined internal timing. A frequency-divided clock generator divide a frequency of a DLL (Delay Locked Loop) clock so as to generate an even-numbered divided clock and an odd-numbered divided clock. An even-numbered output enable signal generator generates an even-numbered output enable signal on the basis of an external read command, the timing signal, a CL (CAS Latency), and the even-numbered divided clock. An odd-numbered output enable signal generator generates an odd-numbered output enable signal on the basis of the external read command, a timing signal in which the timing signal is inverted, the CL, and the odd-numbered divided clock. A logical unit logically operates the even-numbered output enable signal and the odd-numbered output enable signal and outputs an output enable signal. | 11-27-2008 |
20090067540 | METHOD FOR CONSTRUCTING RACH PREAMBLE AND METHOD FOR TRANSMITTING RACH SIGNAL - A wireless communication system is disclosed. A method for constructing a RACH preamble according to a cell radius of a base station (BS) irrespective of a guard time (GT) and a method for allocating the RACH preamble are disclosed. A method for constructing a preamble of a random access channel (RACH) includes acquiring time-length information of a predetermined cyclic prefix (CP) for each cell radius of a base station (BS), acquiring sequence time-length information of a single sequence or a repeated sequence, and constructing the preamble using the predetermined CP time-length information and the sequence time-length information, irrespective of a time length of a guard time (GT). | 03-12-2009 |
20090175292 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request is transmitted and the sequence number information included in the received random access response. | 07-09-2009 |
20090175372 | METHOD OF TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting data in a wireless communication system, includes: transmitting first data via a first frame for a first wireless communication system; transmitting second data via a second frame for a second wireless communication system supporting backward compatibility with respect to the first wireless communication system; and transmitting control information with respect to the first and second frames, wherein the control information includes a frame control header (FCH) which indicates information about the second frame by using a reserved bit region of the first frame. | 07-09-2009 |
20090175373 | SYMBOL MAPPING METHOD FOR REPETITION CHANNEL CODING - A symbol mapping method for repetition coding is disclosed. The symbol mapping method comprises performing repetition coding on codeword to output repeated codeword symbols, and mapping the repeated codeword symbols with subcarriers located in different localized resource blocks. According to the embodiments of the present invention, it is possible to obtain maximum reliability in a receiving side by mapping codeword bits with subcarriers to reduce the number of bits having low reliability when a transmitting side uses repetition coding. Also, it is possible to improve decoding throughput and obtain channel diversity. | 07-09-2009 |
20090219802 | APPARATUS AND METHOD FOR TRANSMITTING DATA USING A PLURALITY OF CARRIERS - The present invention relates to a data transceiving method in a communication system based on a plurality of carriers, and more particularly, to a method of designing a sequence in a communication system using orthogonal subcarriers. The present invention includes the steps of generating a time-domain sequence with a specific length in a time domain, generating a frequency-domain sequence by performing a DFT or FFT operation on the time-domain sequence according to a length of the generated sequence, including a DC subcarrier and a guard subcarrier in the frequency-domain sequence, and performing an IDFT or IFFT operation on the frequency-domain sequence including the DC subcarrier and the guard subcarrier. | 09-03-2009 |
20090249158 | METHOD FOR PACKET RETRANSMISSION EMPLOYING FEEDBACK INFORMATION - A method for packet retransmission employing feedback information is disclosed. The method for packet retransmission employing feedback information comprises receiving reception acknowledgement information from a receiver after a transmitter transmits packets, the reception acknowledgement information representing channel status information and decoding success/failure of the packets; and changing a retransmission mode in accordance with the channel status information if the reception acknowledgement information represents decoding failure, and transmitting retransmission packets of the packets in accordance with the changed retransmission mode. Thus, it is possible to improve decoding probability of the receiver and increase efficiency of retransmission. | 10-01-2009 |
20090268602 | METHOD OF GENERATING CODE SEQUENCE AND METHOD OF TRANSMITTING SIGNAL USING THE SAME - A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end. | 10-29-2009 |
20090290662 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 11-26-2009 |
20100046464 | METHOD OF SUPPORTING HETEROGENEOUS MODE IN A WIRELESS COMMUNICATION SYSTEM - A data communication method is disclosed, which can simultaneously support heterogeneous systems in a wireless communication system based on multiple carrier multiple access. For a dual mode between heterogeneous systems, the data communication method includes transmitting control information for a first system mode and a second system mode to a mobile station through a channel resource zone used in the first system mode, and performing data transmission and reception between the system and the mobile station through channel resource zones allocated from the first system mode or the second system mode. | 02-25-2010 |
20100046663 | METHOD FOR GENERATING 2 OR MORE SEQUENCE SET, AND METHOD FOR GENERATING SEQUENCE FOR THE SAME - A method for generating a set of at least two sequences is provided. This method selects at least one sequence from each of at least two sequences based on different lengths, including first and second types of sequences, and generates a set of at least two sequences using the selected sequences. Another method selects at least one sequence from a first type of sequences and at least one sequence from a second type of sequences generated by modulating the first type of sequences using a different type of sequences, and generates the set of at least two sequences using the selected sequences. To generate sequences based on a length corresponding to available subcarriers excluding a DC subcarrier, another method generates sequences such that the sequences are continuously arranged in a region excluding the DC subcarrier using frequency-domain cyclic shift while none of the sequences is allocated to the DC subcarrier. | 02-25-2010 |
20100054235 | METHOD FOR ADJUSTING RACH TRANSMISSION AGAINST FREQUENCY OFFSET - A method for establishing RACH transmission to prepare against the frequency offset is disclosed. The method reduces the length of the RACH preamble even if the frequency offset exists, allows the RACH preamble to include a repeated structure (also called an iterative structure) or to use a specific sequence with less affect on the frequency offset, so that the Node-B can easily detect the RACH preamble. If different conditions are established in a high-speed UE and a low-speed UE, an amount of system overheads can be reduced as compared to another case in which an overall RACH condition has been prescribed for only the high-speed UE irrespective of the low-speed UE. And, the method determines whether the user equipment (UE) can estimate its speed according to the aforementioned RACH setup condition, and prescribes a detailed RACH access method according to the determined result. | 03-04-2010 |
20100067453 | METHOD FOR ALLOCATING PILOTS - There is provided a method for allocating pilots to a sub-frame. The sub-frame includes a plurality of blocks in time domain. The method includes allocating a data demodulation (DM) pilot used for demodulating data to two blocks spaced not contiguous with each other, and allocating a channel quality (CQ) pilot. System capacity can be increased, and degradation of performance incurred by a channel estimation error can be minimized. | 03-18-2010 |
20100109725 | DLL CIRCUIT HAVING DUTY CYCLE CORRECTION AND METHOD OF CONTROLLING THE SAME - A delay locked loop (DLL) circuit includes a duty cycle correcting unit configured to correct a duty cycle of a reference clock signal in response to a duty cycle correction signal and generate a correction clock signal. A feedback loop of the DLL circuit performs a delay lock operation on the correction clock signal and generates an output clock signal. A first duty cycle detecting unit detects a duty cycle of the correction clock signal and generates a first detection signal and a second duty cycle detecting unit detects a duty cycle of the output clock signal and generates a second detection signal. Finally, a duty cycle control unit generates the duty cycle correction signal in response to the first detection signal and the second detection signal to perform the duty cycle correction. | 05-06-2010 |
20100156486 | DLL CIRCUIT HAVING ACTIVATION POINTS - A delay locked loop (DLL) circuit includes a delay line configured to generate a delay clock signal by delaying a reference clock signal in response to a delay control signal, the delay line having two or more initial activation points, wherein the initial activation points are selected according to an initial value of the delay control signal; a delay compensating unit configured to generate a feedback clock signal by delaying the delay clock signal for a predetermined time; a phase detecting unit configured to generate a phase detection signal by comparing a phase of the reference clock signal to a phase of the feedback clock signal; and a delay control unit configured to generate the delay control signal in response to the phase detection signal. | 06-24-2010 |
20100220618 | METHOD FOR TRANSMITTING CHANNEL INFORMATION AND MOBILE COMMUNICATION TERMINAL - A method for transmitting channel information and a mobile communication terminal are disclosed. The method for transmitting channel information includes requesting, by a mobile station (MS) through a random access channel (RACH), a base station (BS) to allocate a resource for transmitting channel information, if it is determined that transmission of a channel status of a downlink channel is necessary as a result of monitoring the channel status, and transmitting, from the MS through the RACH to the BS, the channel information which is updated according to the channel status if the resource allocation is completed. Therefore an existing control channel can be efficiently used, without adding a new control channel for channel quality identifier (CQI) transmission by a mobile station or modifying the configuration of a transmitting stage. Further, signal interference for the existing channels can be prevented when generating a scheduling request. | 09-02-2010 |
20100220645 | METHOD FOR COMMUNICATING WITH RELAY STATION - A method for communicating with a relay station is disclosed. The method for communicating with a relay station comprises transmitting resource allocation information of downlink traffic and uplink traffic from a base station to the relay; and transmitting the downlink traffic to the relay by encapsulating the downlink traffic in accordance with the resource allocation information and receiving encapsulated uplink traffic from the relay in accordance with the resource allocation information. It is possible to enable efficient communication through a relay using a minimum interface without deterioration of throughput even in the case that a base station does not know detailed attributes of a relay existing in a system. Also, it is possible to coordinate collision through a master relay in case of a system supporting multi-hop relays. | 09-02-2010 |
20100227636 | METHOD FOR RANDOM ACCESS BASED ON PRIORITY - A random access method based on priority is disclosed. A priority-based random access method for use in a random access method supporting emergency communication including selecting, by a user equipment (UE), a random access slot corresponding to priority of the UE, among several random access slots to which at least two priorities are allocated, selecting an arbitrary sequence by the UE, and transferring the selected sequence to a base station via the selected random access slot. The method minimizes a UE access delay time requesting emergency communication by assigning priority to resources, and is able to reduce an amount of wasted resources by effectively distributing resources to not only a high-priority UE but also a low-priority UE according to individual situations. | 09-09-2010 |
20100246378 | Method for Signal Mapping and Signal Transmission with Subcarrier Shift Schemes - A signal mapping method and a signal transmission method applying a subcarrier shift method are described. A signal mapping method using shifted subcarriers includes shifting positions of data subcarriers by as much as a frequency band corresponding to half of spacing between data subcarriers on a frequency axis, and shifting positions of random access preamble subcarriers by as much as a frequency band corresponding to half of spacing between the data subcarriers and to a specific ratio of spacing between the random access preamble subcarriers, and mapping data and a random access preamble to the data subcarriers and the random access preamble subcarrier, respectively. Even when the spacing between the data subcarriers is a multiple of the spacing between the random access preamble subcarriers, DC distortion can be minimized. | 09-30-2010 |
20100264966 | SEMICONDUCTOR INTEGRATED CIRCUIT AND METHOD OF CONTROLLING THE SAME - A semiconductor integrated circuit includes an update control unit configured to generate an update control signal in response to a first command and a second command; and a DLL (Delay Locked Loop) circuit configured to generate an output clock by controlling a phase of an external clock in response to the update control signal. | 10-21-2010 |
20100265897 | METHOD FOR RETRANSMITTING PACKETS ACCORDING TO DECODING FAILURES OR RELIABILITY - A method for retransmitting packets in accordance with decoding failure or reliability is disclosed. A method for retransmitting packets from a transmitting side in accordance with information of a receiving side comprises changing an order of packet symbols mapped with subcarriers, if retransmission information representing decoding success or reliability for a specific codeword is received from the receiving side! mapping the packet symbols with the subcarriers in accordance with the changed order; and transmitting a codeword generated in accordance with the mapped result to the receiving side. Thus, it is possible to improve packet decoding success probability of the receiving side during initial transmission or retransmission by controlling a type of transmission packets in accordance with feedback information of the receiving side. | 10-21-2010 |
20100272055 | METHOD OF MULTIPLEXING MULTIPLE ACCESS REGION - A method for multiplexing one or more multiple access regions is disclosed. The method for multiplexing one or more multiple access regions in a wireless access system comprises multiplexing the one or more multiple access regions so that a first base station and a second base station among a plurality of base stations which use one or more multiple access schemes together under a multi-cell environment use a single multiple access scheme in a predetermined resource region allocated to each of the first base station and the second base station; and transmitting multiplexing information obtained from the multiplexing the one or more multiple access regions to a mobile station included in a cell region of the plurality of base stations. As a user uses SC-FDMA scheme and OFDMA scheme together, it is possible to obtain a single carrier effect of the SC-FDMA system and flexibility of the OFDMA system on a time axis and a frequency axis. | 10-28-2010 |
20100278083 | METHOD FOR ESTABLISHING TIME DOMAIN STRUCTURE OF A FRAME IN A HETEROGENEOUS TDD SYSTEMS ENVIRONMENT - Disclosed in a method for establishing a time domain structure of a frame in a heterogeneous TDD systems environment. In other words, in a situation of coexisting heterogeneous systems comprising a first system corresponding to an existing TDD system and a second system corresponding to a new system, a method is provided for establishing a time domain structure of a second frame for the second TDD system mode to enable it to coexist with a first frame for the first TDD (Time Division Duplex) system mode, that comprises obtaining information for the first supported system type and a first ratio between the downlink region and the uplink region of the first frame structure, and then, according to the obtained information, establishing a second ratio between the downlink region and the uplink region of the second frame structure for the second system. Further, particular numerology is provided for said method. | 11-04-2010 |
20100284339 | METHOD OF TRANSMITTING CYCLIC PREFIX LENGTH INFORMATION - A method of transmitting cyclic prefix length information when wireless access systems having different cyclic prefix lengths coexist is disclosed. The method of transmitting cyclic prefix length information comprises including the cyclic prefix length information in a preamble; and transmitting the preamble to a receiving end, whereby a transmitter can notify the receiving end of a current cyclic prefix length. Also, in a specific interval where a super frame header is defined, a single cyclic prefix length is used in a legacy support mode and a legacy disable mode, and cyclic prefix length information of other data or control channel is included in the super frame header and then transmitted to the receiving end. If different CP lengths are used in a legacy support mode of an evolved system, it is possible to solve a problem in detecting a control channel or a data channel, which may occur as the CP lengths are not distinguished from each other after preamble detection. | 11-11-2010 |
20100284358 | Method for Transmitting Preamble for Legacy Support - A method for transmitting a preamble for legacy support is provided. In a communication system for supporting at least one of a first system corresponding to a legacy system and a second system which corresponds to an evolved system and supports two or more scalable bandwidths, a method for transmitting a preamble for the second system is provided. A preamble sequence is generated on the basis of a smallest bandwidth of the two or more scalable bandwidths, the generated preamble sequence is mapped to a resource zone to have a repetition factor which is relatively prime to a repetition factor of a repetition factor of a preamble for the first system, and the preamble sequence mapped to the resource zone is transmitted as the preamble for the second system. | 11-11-2010 |
20100296436 | METHOD OF TRANSMITTING DATA IN A MOBILE COMMUNICATION SYSTEM - Disclosed is a data transmission method in a mobile communication system. The data transmission method through a code sequence in a mobile communication system includes grouping input data streams into a plurality of blocks consisting of at least one bit so as to map each block to a corresponding signature sequence, multiplying a signature sequence stream, to which the plurality of blocks are mapped, by a specific code sequence, and transmitting the signature sequence stream multiplied by the specific code sequence to a receiver. | 11-25-2010 |
20100301911 | SEMICONDUCTOR MEMORY APPARATUS - A semiconductor memory apparatus having a clock signal generation circuit and a data output circuit is presented. The apparatus includes a delay locked loop (DLL), a phase locked loop (PLL), a frequency discrimination unit, and a data output buffer. The DLL circuit is configured to negatively delay a clock signal to generate a DLL clock signal. The PLL circuit is configured to receive the DLL clock signal to generate a control voltage in response to a frequency of the DLL clock signal and to generate a PLL clock signal of a frequency corresponding to a level of the control voltage. The frequency discrimination unit is configured to discriminate a frequency of the DLL clock signal in accordance with the level of the control voltage to generate a frequency discrimination signal. The data output buffer is configured to receive the DLL clock signal or the PLL clock signal to buffer output data signals. | 12-02-2010 |
20100308884 | CLOCK RECEIVER IN SEMICONDUCTOR INTEGRATED CIRCUIT AND METHOD OF CONTROLLING THE SAME - A clock receiver in a semiconductor integrated circuit includes a first clock buffer configured to buffer an external clock to generate a low frequency buffered clock in response to a first operation signal; a second clock buffer configured to buffer the external clock to generate a high frequency buffered clock in response to a second operation signal; and an internal clock generating unit configured to receive the low frequency buffered clock and the high frequency buffered clock, to control states of the first operation signal and the second operation signal and to generate an internal clock. | 12-09-2010 |
20110007730 | METHOD OF GENERATING DATA AND TRANSMITTING SYNCHRONIZATION CHANNEL IN MOBILE COMMUNICATION SYSTEM - A method for a transmitting side to transmit a sync channel in a wireless communication system using a multicarrier is disclosed. The present invention includes the steps of generating one synchronization channel including a plurality of sub-synchronization channels and the generated multicarrier symbol to a receiving side via the synchronization channel. Accordingly, the present invention enables the transmitting side to efficiently use a radio resource, thereby raising data transmission efficiency of synchronization channel. | 01-13-2011 |
20110013595 | METHOD FOR REDUCING HANDOVER INTERRUPTION TIME IN TERMINAL - A method for reducing handover interruption time in a mobile station is disclosed, in which a mobile station performs a ranging procedure using a dedicated ranging code previously allocated from a target base station. The dedicated ranging code allocated by the target base station may be provided through the serving base station, or may directly be provided from the target base station. | 01-20-2011 |
20110019622 | RANGING STRUCTURE, MULTIPLEXING METHOD AND SIGNALING METHOD FOR LEGACY SUPPORT MODE - A method of performing communication in a wireless communication system is disclosed. In performing ranging, which is performed by a terminal in a wireless communication system supporting a normal scheme and a legacy scheme, the present invention includes selecting a specific ranging structure from a first ranging structure supporting the normal scheme and a second ranging structure supporting the legacy scheme, and transmitting a ranging signal using the specific ranging structure, wherein the first ranging structure and the second ranging structure are set to differ in at least one of a time resource, a frequency resource and a code resource. | 01-27-2011 |
20110098070 | METHOD FOR TRANSMITTING PHYSICAL LAYER ID INFORMATION - A method for transmitting IDs of cells of a specific type as physical cell ID information in addition to existing cell ID information is disclosed. For transmission of the physical cell ID information, the number of cell IDs used in transmitting the existing cell ID information on a synchronization channel is increased or a part of existing cell IDs are reserved for transmitting the additional specific-cell ID information. If the number of cell IDs is to be increased, the number of cell ID groups related to a secondary synchronization channel is increased in a manner that removes ambiguity and collision, a cell ID related to a primary synchronization channel is added, which satisfies conjugate symmetry, information is transmitted based on a transmission timing relationship between a primary synchronization code and a secondary synchronization code, or a scrambling scheme is modified. When a part of the existing cell IDs are reserved, conjugate symmetry is also considered in relation to a primary synchronization channel and ambiguity and collision are also considered in relation to a secondary synchronization channel. | 04-28-2011 |
20110102035 | SEMICONDUCTOR INTEGRATED CIRCUIT HAVING DELAY LOCKED LOOP CIRCUIT - A semiconductor integrated circuit is provided. The semiconductor integrated circuit includes: a delay locked loop (DLL) output block configured to delay an input clock signal by a predetermined time in response to a plurality of delay control signals and provide a DLL clock signal; a locking control block configured to compare a phase of a reference clock signal and a phase of a feedback clock signal, and synchronize the phase of the reference clock signal and the phase of the feedback clock signal in response to the plurality of delay control signals; and a locking detection block configured to detect whether the phase of the reference clock signal and the phase of the feedback clock signal are synchronized and the DLL clock signal is locked, wherein, when the DLL clock signal is locked, the locking control block provides the reference clock signal, which is obtained by dividing the input clock signal by n (where n is a natural number equal to or greater than 2), as an internal DLL clock signal. | 05-05-2011 |
20110128059 | DUTY CORRECTION CIRCUIT - A duty correction circuit is presented for use in compensating for a duty rate error brought about when a malfunction of a clock signal generator or a failure of a signal transmission line occurs. The duty correction circuit is configured to select one of differential signals as an input signal according to a duty rate. The duty correction circuit is also configured to combine the input signal and a signal obtained by delaying the input signal by a delay time adjusted in accordance to the duty rate. The duty correction circuit is also configured to generate the combined signal as a duty correction signal. | 06-02-2011 |
20110128916 | METHOD FOR SELF-CONFIGURING A CELLULAR INFRASTRUCTURE AS DESIRED, AND A DEVICE THEREFOR - The present invention relates to wireless communications system. More specifically, the present invention relates to a method in which a mobile station communicates with any desired node in a wireless communications system. This communications method comprises the steps of: transmitting upwards a first signal for searching for any desired node; receiving from the desired node a second signal indicating that a service can be provided to the mobile station, by way of response to the first signal; and carrying out a procedure for receiving the service from the desired node, wherein the desired node monitors the first signal in a sleep mode. | 06-02-2011 |
20110134747 | Method for Uplink Transmitting Control Information - A method for uplink transmitting control information from a user equipment in a wireless communication system comprises selecting a specific point among a plurality of points distributed into a symbol space, corresponding to control information, the symbol space including a modulation dimension and a sequence dimension; mapping a signal corresponding to the specific point with a control channel including single carrier-frequency division multiple access (SC-FDMA) symbols; and transmitting the control channel. Preferably, the specific point belongs to the sequence dimension. | 06-09-2011 |
20110156771 | SEMICONDUCTOR DEVICE AND METHOD FOR OPERATING THE SAME - A semiconductor device includes: an internal clock signal generation unit configured to receive an external clock signal and to generate an internal clock signal in response to a control signal; and a monitoring unit configured to monitor environmental elements reflected in a circuit response to the control signal. | 06-30-2011 |
20110156778 | INTERNAL CLOCK SIGNAL GENERATOR AND OPERATING METHOD THEREOF - An internal clock signal generation circuit is capable of controlling a unit delay time depending on a frequency of an external clock signal. The internal clock signal generation circuit includes an internal clock signal generation unit configured to generate an internal clock signal corresponding to a plurality of unit delay cells enabled in response to a control signal, and a unit delay time control unit configured to detect a frequency of an external clock signal and control a unit delay time of each of the plurality of unit delay cells. | 06-30-2011 |
20110183609 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 07-28-2011 |
20110187432 | SEMICONDUCTOR DEVICE - A semiconductor device including a common delay circuit configured to delay an input signal in response to a delay control code to output a first delayed input signal and a second delayed input signal; a first delay circuit configured to delay the first delayed input signal in response to the delay control code and to output a first output signal; and a second delay circuit configured to delay the second delayed input signal in response to the delay control code and to output a second output signal. | 08-04-2011 |
20110188465 | METHOD OF GENERATING CODE SEQUENCE AND METHOD OF TRANSMITTING SIGNAL USING THE SAME - A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end. | 08-04-2011 |
20110189950 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 08-04-2011 |
20110189951 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 08-04-2011 |
20110195720 | METHOD FOR MANAGING IDENTIFICATION INFORMATION OF HETEROGENEOUS CELLS - Described is a method for managing the identification information of a relay station/femtocell/picocell. It is suggested that the identification information of the relay station/femtocell/picocell inherits either a first or second partial cell ID of the identification information allocated to a region that covers the relay station/femtocell/picocell if the identification information of the relay station/femtocell/picocell comprises the first and second partial cell IDs. At this time, the inherited ID may be a sector ID. The first and second partial cell IDs may or may not have a hierarchical structure. | 08-11-2011 |
20110199889 | SEQUENCE-GENERATING METHOD, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for enabling a transmitter to transmit a sequence in a wireless communication system, and to an apparatus for the same. A sequence-transmitting method comprises the steps of: performing at least one of a complex conjugate operation and a reverse operation on a first sequence to generate a second sequence; mapping the second sequence to a plurality of subcarriers in an Orthogonal Frequency Division Multiple Access (OFDMA) symbol; and transmitting the OFDMA symbol to a receiver. The invention also relates to an apparatus for the sequence-generating method. | 08-18-2011 |
20110201333 | Method for Receiving Control Information in Wireless Communication System and Apparatus Therefor - A method of receiving a control signal by a user equipment in a wireless communication system is disclosed. The present invention includes receiving control regions including the control channel relevant to each of a plurality of component carriers via a plurality of component carriers and detecting the control channel for the user equipment by performing blind decoding by a unit of CCE (control channel element) aggregated at a preset level in a search space included in the control regions. And, start positions of the search spaces in the plurality of component carriers is in a certain relationship. Moreover, the preset level is identically set for each of the plurality of component carriers. | 08-18-2011 |
20110204951 | SEMICONDUCTOR APPARATUS - A semiconductor apparatus for generating an internal voltage includes a control code output block and an internal voltage generation block. The control code output block is configured to output a variable code having a code value corresponding to a voltage level of an internal voltage. The internal voltage generation block is configured to compare the variable code to a setting code and controls the voltage level of the internal voltage according to the comparison. | 08-25-2011 |
20110211488 | TECHNIQUE FOR SIGNAL TRANSMISSION MODE DETERMINATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for determining the transmission mode in a wireless communication system. More specifically, the present invention relates to a method for transmission mode determination in a wireless communication system, comprising a step wherein feedback information regarding channel status is received, and a step wherein it is determined based on said feedback information whether a transmission signal will be transmitted via each of a fixed number of subcarriers, after applying a propagation sequence. | 09-01-2011 |
20110241742 | DATA OUTPUT CONTROL CIRCUIT - A data output control circuit includes a DLL circuit and a delay detection unit. The DLL circuit is configured to generate a second internal clock by delaying a first internal clock generated from an external clock, compare a phase of the first internal clock with a phase of the second internal clock, and generate a DLL clock. The delay detection unit is configured to generate a sense signal whose logic level is changed according to a comparison result of a set time interval and a delay time interval during which the first internal clock is delayed in order to generate the second internal clock. | 10-06-2011 |
20110242905 | SEMICONDUCTOR MODULE INCLUDING MODULE CONTROL CIRCUIT AND METHOD FOR CONTROLLING THE SAME - A module control circuit includes an input unit configured to receive a plurality of data signals from a plurality of data input/output pins and output an identification signal and an internal command signal. A latch unit is configured to latch the identification signal in accordance with a first enable signal to output a first group identification signal, latch the identification signal in accordance with a second enable signal to output a second group identification signal, and latch the internal command signal in accordance with the second enable signal to output a group command signal. A comparator is configured to compare the first group identification signal with the second group identification signal, and generate a selection signal. A multiplexer is configured to select one of the group command signal and a module command signal as an input command in response to the selection signal. | 10-06-2011 |
20110255451 | METHOD AND APPARATUS FOR DATA TRANSMISSION USING A DATA FRAME - A method and apparatus for transmitting data using a frame in a broadband wireless communication system are disclosed. The method for transmitting and receiving data in a broadband wireless communication system includes: setting a data frame for transmitting and receiving data through uplink and downlink; and transmitting and receiving data through the set data frame, wherein the data frame includes one or more first subframes and one or more second subframes including a different number of data symbols from that of data symbols of the first subframe. | 10-20-2011 |
20110268135 | METHOD OF CONSTRUCTING A FRAME BY MULTIPLEXING SUBFRAMES HAVING DIFFERENT CP LENGTH - The present invention relates to a broadband wireless access system, and more particularly, to a frame structure to which OFDM symbols having a cyclic prefix are transmitted. A method of constructing a frame in a broadband wireless access system according to one embodiment of the present invention comprises including one or more first subframes in the frame, the first subframes including a plurality of symbols having a cyclic prefix of a first length; and including one or more second subframes in the frame, the second subframes including a plurality of symbols having a cyclic prefix of a second length different from the first length, wherein the number of the first subframes and the number of the second subframes are determined considering an idle time for which effective symbols are not included in the frame. | 11-03-2011 |
20120007646 | DLL CIRCUIT HAVING ACTIVATION POINTS - A delay locked loop (DLL) circuit includes a delay line configured to generate a delay clock signal by delaying a reference clock signal in response to a delay control signal, the delay line having two or more initial activation points, wherein the initial activation points are selected according to an initial value of the delay control signal; a delay compensating unit configured to generate a feedback clock signal by delaying the delay clock signal for a predetermined time; a phase detecting unit configured to generate a phase detection signal by comparing a phase of the reference clock signal to a phase of the feedback clock signal; and a delay control unit configured to generate the delay control signal in response to the phase detection signal. | 01-12-2012 |
20120008435 | DELAY LOCKED LOOP - A delay locked loop includes a closed loop circuit configured to generate preliminary delay information, a control unit configured to update the preliminary delay information into delay information in response to a control signal, and a first delay unit configured to delay an input clock signal by a first delay value determined by the delay information and generate an output clock signal. | 01-12-2012 |
20120015645 | METHOD FOR TRANSMITTING A SYNCHRONOUS CHANNEL AND AN ESSENTIAL CONTROL INFORMATION CHANNEL, AND FEMTO BASE STATION THEREOF - The present invention provides a method for transmitting a synchronous channel and an essential control information channel in a femto base station. The method comprises the steps of: acquiring by the femto base station segment information from a macro base station which overlays the femto base station; discriminating by the femto base station the segment or subcarrier used by the macro base station; and transmitting by the femto base station a synchronous channel and essential control information thereof on the segment or subcarrier different from the segment or subcarrier discriminated in the previous step. | 01-19-2012 |
20120044833 | METHOD FOR TRANSMITTING RANGING INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND TERMINAL THEREOF - Disclosed is a method for configuring a ranging channel in various frame structures and using the same in a communication system. A ranging channel is effectively configured according to a data structure, namely, frame structure, transmitted and received between a mobile station (MS) and a base station (BS) in a wireless communication system, and ranging information is transmitted therethrough to thereby improve performance of a communication channel and resource efficiency. In the wireless communication system, a ranging channel is configured by using a time interval, such as an idle time, an idle symbol, an RTG, a TTG, and the like, not actually used for transmission of data or a signal in a data structure, namely, in a frame structure, transmitted and received between an MS and a BS, to transmit ranging information, so the channel performance and resource efficiency can be improved. | 02-23-2012 |
20120063403 | METHOD FOR TRANSMITTING A COMMON CONTROL CHANNEL, AND FEMTO BASE STATION FOR SAME - The present invention relates to a femto base station. More particularly, the present invention relates to a method for transmitting a common control channel and to a femto base station for the same. The present invention relates to a method for transmitting a common control channel, comprising a step in which the femto base station acquires segment information from a macro base station which overlays the femto base station; a step of identifying, using the segment information, a time segment used by the macro base station in transmitting the common control channel; and a step of transmitting a common control channel of the femto base station on a time segment other than the time-segment identified in the previous step. The present invention also relates to a femto base station for the method. | 03-15-2012 |
20120093173 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request is transmitted and the sequence number information included in the received random access response. | 04-19-2012 |
20120113940 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CONTROL INFORMATION FOR ADDITIONAL BROADCAST INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for transmitting/receiving control information for additional broadcast information in a wireless communication system. According to one aspect of the present invention, a method for transmitting control information for additional broadcast information in a wireless communication system comprises a step in which a base station transmits control information containing information on the transmission time of the additional broadcast message, and transmits the additional broadcast message at said transmission time. | 05-10-2012 |
20120113955 | METHOD FOR TRANSMITTING A RANGING SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method in which a terminal transmits a ranging signal in a wireless communication system. The method comprises a step of acquiring cell identification information using the preamble received from a base station, a step of determining frequency resource allocation information using the cell identification information and information on the number of allocated subbands, and a step of transmitting a ranging signal using the sub-band indicated by the frequency resource allocation information. | 05-10-2012 |
20130038368 | SEMICONDUCTOR DEVICE - A semiconductor device including a common delay circuit configured to delay an input signal in response to a delay control code to output a first delayed input signal and a second delayed input signal; a first delay circuit configured to delay the first delayed input signal in response to the delay control code and to output a first output signal; and a second delay circuit configured to delay the second delayed input signal in response to the delay control code and to output a second output signal. | 02-14-2013 |
20130039324 | Direct Communication Between Devices - The present invention relates to a wireless communication system, More specifically, the present invention relates to a method and an apparatus for direct communication between terminals. The method for performing communication between terminals using a first terminal in a wireless communication system comprises the steps of: transmitting request information for communication between terminals to a base station; receiving, from the base station, control information necessary for setting a link for communication between the terminals after transmitting the request information; setting a direct link between the terminals for data flow between the first and second terminals using the control information; and the first and second terminals performing communication for data transmission using the direct link between the terminals when the control information is not transmitted from the base station. | 02-14-2013 |
20130120042 | DELAY LOCKED LOOP - A delay locked loop includes a closed loop circuit configured to generate preliminary delay information, a control unit configured to update the preliminary delay information into delay information in response to a control signal, and a first delay unit configured to delay an input clock signal by a first delay value determined by the delay information and generate an output clock signal. | 05-16-2013 |
20130170485 | METHOD OF GENERATING CODE SEQUENCE AND METHOD OF TRANSMITTING SIGNAL USING THE SAME - A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end. | 07-04-2013 |
20130322381 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request transmitted and the sequence number information included in the received random access response. | 12-05-2013 |
20140140431 | TRANSMITTER CIRCUIT, RECEIVER CIRCUIT, AND TRANSMITTING/RECEIVING SYSTEM - A transmitting/receiving system may include a transmission line, a transmitter circuit configured to transmit a clock to the transmission line and to adjust an amplitude of the clock in accordance with a logic level of data, and a receiver circuit configured to receive the clock transferred to the transmission line and to recover the data through detection of the amplitude of the clock. | 05-22-2014 |
20140312930 | SEMICONDUCTOR DEVICE, SEMICONDUCTOR SYSTEM INCLUDING THE SEMICONDUCTOR DEVICE, AND METHOD FOR DRIVING THE SEMICONDUCTOR SYSTEM - A semiconductor device includes a plurality of pads, a plurality of data input/output units connected with the plurality of pads and enabled in response to a plurality of enable signals, and a group programming unit suitable for grouping the plurality of pads into a number of pad groups in response to a mode register set (MRS) code and group information, and generating a number of groups of enable signals corresponding to the number of pad groups, wherein a number of groups of the data input/output units are sequentially enabled in response to respective groups of the enable signals. | 10-23-2014 |
20140312940 | SEMICONDUCTOR DEVICE WITH CLOCK-BASED SIGNAL INPUT CIRCUIT - A semiconductor device includes a signal input circuit suitable for synchronizing an input signal with a dock signal and receiving the dock signal as a power source when the input signal has a first phase. | 10-23-2014 |
20150042385 | SEMICONDUCTOR DEVICE AND SEMICONDUCTOR SYSTEM INCLUDING THE SAME - A semiconductor device includes a buffer unit suitable for outputting a first signal of differential input signals as a positive signal, and a second signal of differential input signals as a negative signal in response to a setting signal, and a setting control unit suitable for generating the setting signal based on a level state of the positive signal and the negative signal in response to a reset signal. | 02-12-2015 |
20150043622 | TRANSMITTING / RECEIVING CIRCUIT AND TRANSMITTING / RECEIVING SYSTEM INCLUDING THE SAME - A transmitting/receiving circuit includes a transmitter suitable for transmitting a transmission signal to a channel, a receiver suitable for receiving a signal of the channel, a replica channel configured by replicating the channel, a replica transmitter suitable for transmitting the transmission signal to the replica channel, a replica receiver suitable for receiving a signal of the replica channel, and a restoring unit suitable for synthesizing the signal of the channel, which is received by the receiver, and the signal the replica channel, which is received by the replica receiver, and restoring a reception signal from the signal of the channel. | 02-12-2015 |