摘要:
A method of performing hybrid automatic repeat request (HARQ) performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving downlink assignments in a first subframe, a downlink assignment being transmitted based on a control channel element (CCE), the CCE being a logically indexed resource unit, receiving downlink data on a downlink shared channel in the first subframe, the downlink shared channel being assigned according to the downlink assignments, generating ACK/NACK signals which indicate successful or unsuccessful reception of the downlink data, and transmitting in a second subframe, the ACK/NACK signals by using uplink resources of a subset, the subset being mapped to the first subframe, at least one of the uplink resources being mapped to a plurality of CCEs in the first subframe. Limited resources for uplink feedback are effectively used to support HARQ operation.
摘要:
A method for transmitting downlink control information and a method for generating a codeword for the same are disclosed. In generating a long code having a low code rate, a basic code of which minimum distance between codes is maximized is repeated by a prescribed number of times and bits of the repeated code are adjusted. Therefore, a minimum distance condition between codes of a long code is satisfied and simultaneously the code can be simply generated. Furthermore, control information can be transmitted with a low error rate by using the generated code.
摘要:
A user equipment and method of transmitting symbols by the user equipment in a wireless communication system. The method includes: generating a first symbol by adding a cyclic prefix (CP) to a first inverse fourier transformed samples, the CP being copied from the first fourier transformed samples; generating a next consecutive second symbol by adding a CP to a second inverse fourier transformed samples, the CP being copied from the second fourier transformed samples; removing samples overlapped with the first symbol from the next consecutive second symbol when the next consecutive second symbol is to be advanced in transmission timing; and transmitting the first symbol and the next consecutive second symbol to a base station.
摘要:
A frequency hopping pattern and a method for transmitting uplink signals using the same are disclosed. A frequency hopping pattern is defined by combination of subband hopping, which is performed over one or more subbands divided from a system band for transmission of the uplink signals, and mirroring where resource blocks within one subband are arranged reversely based on the center of the subband. Sequences as to whether to apply minoring and subband hopping amount are cell-specific random numbers, and are generated independently or in combination.
摘要:
A method of generating a sub-packet in consideration of an offset is disclosed. A method of generating a sub-packet in consideration of an offset, for re-transmission of a packet from systematic bits and parity bits stored in a circular buffer includes turbo-coding an input bitstream at a predetermined code rate and generating and storing the systematic bits and the parity bits in the circular buffer, and deciding a starting position of the sub-packet in the circular buffer in consideration of the offset for puncturing at least a portion of the systematic bits of the circular buffer. Accordingly, it is possible to efficiently decide the starting position of the sub-packet to be transmitted adaptively with respect to a variable packet length, improving a coding gain, reducing complexity and reducing a calculation amount.
摘要:
A user equipment and corresponding method of transmitting symbols by the user equipment in a wireless communication system. The method includes: generating a first symbol and a second symbol, each symbol including a cyclic prefix and a data part; manipulating a part of the second symbol to be ignored in transmission so that the first symbol and a remaining part of the second symbol are transmitted without overlapping, when the first symbol and the second symbol are overlapped due to a transmission timing advance of the second symbol; and transmitting the first symbol and the second symbol at each transmission timing to the base station.
摘要:
A method for performing uplink transmission in a time domain transmission unit includes receiving, from a base station, hopping-mode information indicating whether a frequency hopping is an inter-slot hopping or an inter-subframe hopping and performing the uplink transmission using a resource block in the time domain transmission unit.
摘要:
A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets.
摘要:
Apparatus and method for controlling data transmission rate in a wireless communication system during handoff comprises a terminal recognizing an active set comprising a serving base station and at least one non-serving base station with respect to the terminal communicating with the network at a first data transmission rate, receiving a first rate control parameter from the serving base station and a second rate control parameter from the at least one non-serving base station, wherein the first and second rate control parameters are associated with determination of a second data transmission rate of the terminal during the handoff and determining the second data transmission rate in response to the first and the second rate control parameters, wherein the second data transmission rate is one of increased rate, decreased rate and same rate from the first data transmission rate.
摘要:
The present invention relates to receiving control information in an orthogonal frequency division multiplexing (OFDM) system of a mobile communication system. The present invention includes receiving information related to a number of OFDM symbols in a subframe for receiving first control information, receiving information related to a number of OFDM symbols in the subframe for receiving second control information, decoding the first control information according to the received information related to the number of OFDM symbols in the subframe for receiving the first control information, and decoding the second control information according to the received information related to the number of OFDM symbols in the subframe for receiving the second control information, wherein the number of OFDM symbols for receiving the first control information is less than or equal to the number of OFDM symbols for receiving the second control information.