摘要:
A method of transmitting data in a wireless communication system is provided. The method includes transmitting downlink scheduling information regarding downlink radio resource allocation and uplink scheduling information regarding uplink radio resource allocation on a downlink control channel, transmitting downlink data on a downlink data channel according to the downlink scheduling information, and detecting an acknowledgement (ACK)/negative-acknowledgement (NACK) signal for the downlink data from a radio resource exclusively allocated to the ACK/NACK signal. According to the present invention, when an error occurs in a downlink control channel due to deterioration of a channel condition, the error can be promptly handled using an error detection protocol agreed between a user equipment and a base station. Therefore, data can be transmitted with higher reliability.
摘要:
A method of transmitting control information includes generating a cyclically shifted sequence by cyclically shifting a base sequence by a cyclic shift amount, generating a modulated sequence based on a modulation symbol for control information and the cyclically shifted sequence, and transmitting the modulated sequence on a plurality of subcarriers, wherein available cyclic shifts of the base sequence are divided into a first part and a second part according to a type of the control information, and the first part and the second part are separated by at least one unallocated cyclic shift of the base sequence.
摘要:
A method for implementing transmit diversity in a wireless mobile communication system adopting an SC-FDMA scheme is provided. A sequence of modulation symbols output from a DFT block are precoded prior to IFFT. The precoding is performed independently on an antenna basis. Modulation symbols mapped to each subcarrier of an SC-FDMA symbol, to be transmitted through each antenna may be additionally phase-shifted.
摘要:
A method for efficiently providing data and a reference signal (RS) when antennas are added to an existing system is provided. The method includes transmitting an RS in a downlink MIMO system that supports a first user equipment (UE) and a second UE, the first UE recognizing four predetermined transmitting antennas among eight transmitting antennas and the second UE recognizing the eight transmitting antennas, generating a subframe that can be recognized by both the first UE and the second UE and transmitting the generated subframe to the first UE and the second UE, where the first UE and the second UE recognize all orthogonal frequency division multiplexing (OFDM) symbols of the subframe.
摘要:
A joint coding method in a mobile communication system is disclosed. To block-code kχ-bit first data requiring a received signal quality and k2˜bit second data requiring a different received signal quality, the present invention includes configuring a first block code generation matrix meeting a first minimum hamming distance, configuring a second block code generation matrix meeting a second minimum hamming distance, and configuring a third block code generation matrix including the first block code generation matrix, the second block code generation matrix and a zero matrix of a specific size. Accordingly, the present invention encodes and transmits two data requiring different received signal qualities by one coding scheme, thereby enabling each data to have the required received signal quality in decoding.
摘要:
A method of transmitting signals by a transmitting end in a wireless communication system comprises sharing control information related to reference signal with a receiving end; generating one or more precoded reference signals considering a given rank; allocating the one or more precoded reference signals to have a specific pattern within a subframe, wherein the specific pattern is varied depending on the control information; and transmitting the subframe through multiple antennas to the receiving end.
摘要:
An STBC based signal transmission method considering the number of symbols within a slot. In transmitting a signal using two or more transmission antennas in a mobile communication system using a structure in which one subframe includes two slots and each slot includes a plurality of symbols, transmission symbols are paired in units of two consecutive symbols within each subframe by an STBC scheme. The transmission symbols are mapped to a frequency region in units of slots and the mapped transmission symbols are transmitted. One symbol within a slot in which the number of symbols excluding symbols for transmitting a reference signal is an odd number is not paired by the STBC scheme.
摘要:
A method of multiplexing control information and data information in a wireless communication system is disclosed. The present invention includes mapping codewords corresponding to the data information to a preset number of layers, mapping the control information to the preset number of the layers, multiplexing the layer-mapped data information and the layer-mapped control information into a frequency region within an SC-FDMA symbol, and transmitting the SC-FDMA symbol to a base station via multiple antennas.
摘要:
A method for transmitting signals using a hybrid automatic repeat request (HARQ) scheme to guarantee a constellation rearrangement gain having a predetermined level or more is provided. Predetermined code blocks are encoded, sub-block interleaving is performed with respect to the encoded code blocks, and the sub-block interleaved code blocks are transmitted according to redundancy version (RV) start locations of the sub-block interleaved code blocks. The RVs are set such that the order of bit streams modulated by an M-QAM (M>4) scheme is changed upon a retransmission. In addition, the RVs are set such that the RV start locations applied to code blocks having different sizes are different.
摘要:
A method and apparatus for allowing a UE to transmit uplink signals using a MIMO scheme are disclosed. In order to maintain good Peak power to Average Power Ratio (PAPR) or Cubic Metric (CM) properties when the UE transmits uplink signals using the MIMO scheme, the UE uses a preceding scheme based on a preceding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission.