Method for transmitting channel state information and feedback information of hybrid automatic repeat request

A hybrid automatic retransmission and state information technology, applied in the direction of error prevention/detection using the return channel, can solve the problems of reducing battery life, increasing UE transmit power, increasing UE interference, etc., and achieve low signal peak level than the effect

Inactive Publication Date: 2012-03-14
BEIJING SAMSUNG TELECOM R&D CENT +1
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Problems solved by technology

However, because the bit error rate (BER) requirement of general CQI / PMI (generally about 0.1) is much greater than the BER requirement of ACK / NACK information (generally 0.01~0.001), joint coding will cause CQI to be transmitted with more power than actually required , which increases UE transmit power, reduces battery life and increases interference between UEs

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  • Method for transmitting channel state information and feedback information of hybrid automatic repeat request
  • Method for transmitting channel state information and feedback information of hybrid automatic repeat request
  • Method for transmitting channel state information and feedback information of hybrid automatic repeat request

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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The main method provided by the present invention can be as figure 2 As shown, it mainly includes the following steps:

[0022] Step 201: Determine the transmission reliability requirement type of the CSI to be fed back in the current subframe, and if the difference between the CSI and the transmission reliability requirements of the ACK / NACK information is within the set range, perform step 202; if the CSI and the ACK / NACK information If the difference required by the information transmission reliability exceeds the set range, step 203 is executed.

[0023] CSI includes RJ, PMI and CQI. Generally speaking, RI changes slowly and requires high transmission reliability, usually the reliability requirement is 0.01-0.001; while PMI / CQI chang...

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Abstract

The invention provides a method for transmitting channel state information (CSI) and feedback (ACK (Acknowledgement)/NAC (Negative Acknowledgement)) information of a hybrid automatic repeat request. The method comprises the following steps of: determining a transmission reliability requirement type of the CSI fed back by a current sub-frame; if the difference between the CSI and the transmission reliability requirement of ACK/NAC information is positioned within a set range, carrying out joint coding on the CSI and the ACK/NAC information; mapping information obtained by joint coding on a discrete Fourier transform-spreading-orthogonal frequency division multiplexing (DFT-S-OFDM) channel for transmitting; and otherwise, processing the CSI and the ACK/NAC information by adopting a mode except a joint coding mode and mapping the processed control information to the DFT-S-OFDM channel for transmitting. According to the method disclosed by the invention, the transmission power of UE (User Equipment) can be reduced and the interference between the UE is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for transmitting channel state information (CSI) and hybrid automatic repeat request feedback (ACK / NACK) information. Background technique [0002] In the long-term evolution (LTE) system, for downlink data transmission, the user equipment (UE) measures and reports the downlink channel state information (CSI), which includes channel rank information (RI), indication information of a suitable precoding matrix ( PMI) and channel quality indicator information (CQI). After receiving these channel state information, the base station can allocate downlink resources and corresponding coding and modulation methods for the UE, so as to perform downlink data transmission based on hybrid automatic repeat request (HARQ). For downlink data transmission based on HARQ, when the UE correctly receives the data from the base station, the UE sends an acknowledgment (ACK) fee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18
Inventor 李迎阳孙程君李小强
Owner BEIJING SAMSUNG TELECOM R&D CENT
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