摘要:
A method for transmitting a user equipment (UE)-triggered channel status information (CSI) is disclosed. A UE transmits a preamble to an eNode B (eNB) through a random access channel (RACH) or a CSI RACH. The UE receives a response allocating a CSI feedback resource or allocating a resource for negotiation from the eNB. The UE transmits the CSI and a UE ID, or only the CSI to the eNB through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH).
摘要:
A method of estimating a signal-to-noise ratio by considering user mobility, a method of adjusting feedback information transmission, an adaptive modulation and coding method using the same, and a transceiver thereof are disclosed. The present invention includes measuring a first channel parameter and a second channel parameter using first and second symbols sequentially received, respectively, estimating a channel quality considering a time delay between measurements of the first and second channel parameters using the first and second channel parameters, and transmitting information for the estimated channel quality if a variation of the first and second channel parameters is equal to or greater than a prescribed threshold. Accordingly, the present invention reduces performance degradation and feedback overhead caused by a time delay in channel quality estimation.
摘要:
A method for detecting control information in a wireless communication system is provided. The method includes checking a cyclic redundancy check (CRC) error by monitoring control channels, determining whether a value of an error check field is equal to a specific value, and, if the value of the error check field is equal to the specific value, detecting the control information on the control channel.
摘要:
A method of transmitting data in a wireless communication system is disclosed. More specifically, the method includes receiving a first group index and a second group index, wherein the first group index represents indices of a group having channel power below a specified threshold value and the second index group index represents indices of a group having channel power greater than or equal to the specified threshold value, and transmitting the data after swapping mapping locations of the first group index and the second group index.
摘要:
A method of selecting a modulation and coding scheme (MCS) in a wireless communication system is disclosed. More specifically, the method includes selecting a MCS index having a coding rate that is greater than a specified coding rate threshold if a resource allocation scheme of a transmitting end employs a localized resource allocation scheme, and selecting the MCS index having the coding rate that is less than the specified coding rate threshold if the resource allocation scheme of the transmitting end employs the distributed resource allocation scheme.
摘要:
A method of estimating a signal-to-noise ratio by considering user mobility, a method of adjusting feedback information transmission, an adaptive modulation and coding method using the same, and a transceiver thereof are disclosed. The present invention includes measuring a first channel parameter and a second channel parameter using first and second symbols sequentially received, respectively, estimating a channel quality considering a time delay between measurements of the first and second channel parameters using the first and second channel parameters, and transmitting information for the estimated channel quality if a variation of the first and second channel parameters is equal to or greater than a prescribed threshold. Accordingly, the present invention reduces performance degradation and feedback overhead caused by a time delay in channel quality estimation.
摘要:
A method for transmitting a user equipment (UE)-triggered channel status information (CSI) is disclosed. A UE transmits a preamble to an eNode B (eNB) through a random access channel (RACH) or a CSI RACH. The UE receives a response allocating a CSI feedback resource or allocating a resource for negotiation from the eNB. The UE transmits the CSI and a UE ID, or only the CSI to the eNB through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH).
摘要:
A method of selecting a modulation and coding scheme (MCS) index in a wireless communication system is disclosed. More specifically, the method includes measuring a frequency selectivity of a receiving channel, selecting a MCS index having a coding rate below a prescribed coding rate threshold value if the measured frequency selectivity is greater than or equal to a specified frequency selectivity threshold, and selecting the MCS index having the coding rate above or equal to the prescribed coding rate threshold value if the measured frequency selectivity is less than the specified frequency selectivity threshold.
摘要:
A method of transmitting data in a wireless communication system is disclosed. More specifically, the method includes receiving a first group index and a second group index, wherein the first group index represents indices of a group having channel power below a specified threshold value and the second index group index represents indices of a group having channel power greater than or equal to the specified threshold value, and transmitting the data after swapping mapping locations of the first group index and the second group index.
摘要:
The present invention relates to a wireless communication system, and more particularly, to a method of transmitting feedback, by which a signaling overhead can be efficiently reduced. In receiving a group feedback by a transmitting end in a wireless communication system, the present invention includes transmitting at least one data unit to a receiving end during a prescribed time interval and receiving a group feedback indicating a presence or non-presence of error for the overall at least one data unit from the receiving end. Accordingly, a transmitting/receiving end of a communication system transceives a group feedback for multiple feedbacks indicating an error presence or non-presence of overall data received in TTI, thereby reducing a signaling overhead.