摘要:
A method and an apparatus for data transmission in a mobile telecommunication system supporting an enhanced uplink service are provided. A Transport Format Combination (TFC) selector determines TF information for data to be transmitted through a first data channel not supporting Hybrid Automatic Repeat reQuest (HARQ) and a second data channel supporting HARQ, and determines gain factors for the first and second data channel, and first and second control channel carrying control information for the first and second data channel. The gain factors are input to a physical channel transmission controller, and the physical channel transmission controller reduces the gain factor for the second channel if total transmit power required for transmission of the channels exceeds the predetermined maximum allowed power. A gain scaler adjusts transmit powers of the channels using the scaled gain factor and gain factors for the first data channel, the first control channel and the second control channel.
摘要:
An apparatus and method for transmitting a control signal using a symbol or bit pattern of an existing pilot channel, instead of using the time multiplexing method in the separate code channel or the existing physical channel, and reducing an error rate while a reception side detects the control signal are provided. For that purpose, a transmission side allocates transmission power corresponding to a pilot pattern determined according to the control information. A corresponding reception side detects control information based on a pilot pattern of pilot bits inserted in a dedicated physical channel (DPCH) and generates transmit power control (TPC) bits referring to a target reception power which is set based on the control information.
摘要:
A method and an apparatus and for transmitting downlink Hybrid Automatic Repeat request (HARQ) information in a wireless communication system are provided. In the method, at least one Physical Resource Block (PRB) for transmitting a Physical HARQ Indicator Channel (PHICH) signal is set among all PRBs forming an available frequency band. A PHICH resource is determined within the set at least one PRB. A PHICH signal is transmitted using the determined PHICH resource.
摘要:
A method for mapping wireless resources of reference symbols for channel state estimation and modulation symbols for user information transmission in a transmitter of an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system is disclosed. The mapping method includes channel-encoding and modulating a user information stream to be transmitted, and then generating a systematic symbol stream and a parity symbol stream; and preferentially arranging systematic modulation symbols in resource elements of a symbol including no reference symbol, and then arranging parity modulation symbols in remaining resource elements.
摘要:
Provided is a method and apparatus for transmitting a synchronization signal for cell search in an Orthogonal Frequency Division Multiplexing (OFDM) communications system. The method includes acquiring Primary Synchronization CHannel (P-SCH) sequence and Secondary Synchronization CHannel (S-SCH) sequence; mapping the P-SCH sequence and the S-SCH sequence onto subcarriers; generating OFDM symbols including the P-SCH sequence and the S-SCH sequence mapped onto subcarriers; and transmitting the OFDM symbols, wherein a frame comprising a plurality of OFDM symbols, a part of the plurality of OFDM symbols in the frame is used for transmitting Synchronization CHannel (SCH) comprising P-SCH and S-SCH, and wherein the P-SCH and the S-SCH are mapped to adjacent OFDM symbols and the S-SCH is mapped to subcarriers with a predetermined interval in a frequency domain within an OFDM symbol.
摘要:
A method and an apparatus and for transmitting downlink Hybrid Automatic Repeat request (HARQ) information in a wireless communication system are provided. In the method, at least one Physical Resource Block (PRB) for transmitting a Physical HARQ Indicator Channel (PHICH) signal is set among all PRBs forming an available frequency band. A PHICH resource is determined within the set at least one PRB. A PHICH signal is transmitted using the determined PHICH resource.
摘要:
The present invention relates to a method for sending and receiving a reference signal for a backhaul subframe in a wireless communication system in which a relay is present and also to a device therefor, constituted in such a way that common reference signals for a plurality of receiving devices and reference signals dedicated to separate receiving devices are allocated dispersed in a subframe, and the common reference signals and the dedicated reference signals are generated and are sent and received via the subframe. The present invention can improve the channel estimation performance for subframes in a wireless communication system. In this way, communications efficiency in wireless communication systems can be improved.
摘要:
An apparatus and method for resource allocation information transmission is provided. The method includes determining a search space for use in a second frequency band using resource allocation information of a first process detected in a first frequency band, detecting resource allocation information using the search space in the second frequency band, and when failing to decode received data according to the resource allocation information detected in the second frequency band, re-detecting resource allocation information of the first process in the second frequency band in a first time interval using the search space without detecting the resource allocation information of the first process in the first frequency band.
摘要:
Methods and apparatus are provided for transmitting control information in an SC-FDMA system. A UE generates a random cyclic shift value based on an SC-FDMA symbol index and a slot index. The UE cyclically shifts a sequence by the random cyclic shift value. The UE multiplies a control channel signal, including the control information, by the cyclically shifted sequence on an SC-FDMA symbol basis. The UE transmits the multiplied control channel signal in an SC-FDMA symbol to a Node B.
摘要:
A method and apparatus for transmitting and receiving a common control channel in an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system. In the transmission apparatus, when a plurality of bursts are transmitted during a Transmission Time Interval (TTI) of the common control channel, an Inverse Fast Fourier Transform (IFFT) mapper generates bursts that are shifted in a frequency domain by applying a predetermined cyclic shift offset between the bursts, and maps the generated bursts in a resource block. A transmission unit transmits the bursts to a receiver. In the reception apparatus, a reception unit receives a burst, and a combining unit combines the received burst with a burst stored in a buffer. A decoder decodes each of the combined bursts, and upon a successful decoding, detects a TTI start timing of the common control channel from the successfully decoded burst.