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Method for multiplexing uplink information

A technology for controlling information and channels, which is applied in the direction of using the return channel for error prevention/detection, wireless communication, signaling distribution, etc., and can solve the problem of increasing the total number of HARQ-ACK bits

Inactive Publication Date: 2016-11-02
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the number of cells that need to feed back HARQ-ACK information on the PUCCH of a cell increases, if the downlink data transmission performance is not affected too much, the total number of HARQ-ACK bits that need to be fed back on the PUCCH will increase, for example, greater than 22 bits

Method used

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  • Method for multiplexing uplink information
  • Method for multiplexing uplink information
  • Method for multiplexing uplink information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] In the CA system, when the number of configured cells is large, or the size of the binding window is large, the UE needs to feed back more HARQ-ACK bits, for example, more than 22 bits. In addition, when the number of configured cells is large, the CSI information that the UE needs to feed back also increases accordingly. In addition, the UE may also need to send a Scheduling Request (SR) in the uplink direction. Because the number of bits of HARQ-ACK and CSI has increased, such as figure 1 The existing UCI mapping method shown will not be able to meet the performance requirements of UCI transmission in certain cases. For example, taking HARQ-ACK as an example, when the number of bits of HARQ-ACK information is large, but the number of PRBs of PUSCH is small, the method of only mapping HARQ-ACK information to the 4 symbols next to DMRS may not be enough to ensure HARQ - ACK transmission performance requirements.

[0130] The following describes the processing method ...

Embodiment 2

[0146] In the existing CA system, when the P-CSI and A-CSI need to be fed back in the same subframe, the processing method is to drop the P-CSI and only feed back the A-CSI. However, when the number of configured cells is large, the CSI information that the UE needs to feed back increases accordingly, and the probability that P-CSI and A-CSI need to be fed back in the same subframe also increases accordingly. In order to reduce the impact on downlink transmission, it is necessary to support the transmission of P-CSI and A-CSI in the same subframe. At this time, all the currently triggered A-CSI needs to be fed back, and for the P-CSI in this subframe, a part of the P-CSI or all of the P-CSI may be fed back according to a certain criterion. Several preferred methods provided by the present invention are described below.

[0147] The first method is to transmit only the P-CSI of the Pcell in addition to the A-CSI. That is, when the P-CSI mapped to a subframe includes the P-CSI...

Embodiment 3

[0158] In one uplink subframe, multiple types of UCI information may need to be transmitted. As the number of configured UE cells increases, this requirement becomes more prominent. In a subframe, the UE may perform joint coding, rate matching and modulation on all the UCI information to be fed back in the current subframe, and then map it to the uplink channel. Alternatively, the UE may also classify the UCI information and perform encoding, rate matching and modulation on the UCI information of different classifications respectively. For example, information that requires higher reliability, including HARQ-ACK, SR, and the first type of CSI information can be jointly encoded together; second type CSI information that requires lower reliability can be jointly encoded together. In order to map to the uplink channel, for a set of jointly coded UCI information, it is necessary to calculate the number of modulation symbols occupied by it.

[0159] In the existing LTE CA system,...

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Abstract

The invention discloses a method for multiplexing the uplink control information (UCI) in an uplink channel. Firstly, the UCI is classified by the UE, and different types of the UCI are respectively subjected to encoding, rate matching and modulating. Secondly, the UE respectively maps different types of the UCI on the uplink channel. The invention also discloses a method and a device for multiplexing the P-CSI and the A-CSI in the uplink channel, a method and a device for determining the number of modulation symbols occupied by the UCI, and a method and a device for determining an uplink physical resource block for uplink transmission. The invention provides a general physical resource mapping method for processing various types of the uplink information, and ensures the reliability requirements of different types of the UCI information. Meanwhile, the P-CSI fed back together with the A-CSI is optimized, so that the feedback overhead is reduced. Moreover, uplink channel resources allocated by a base station can be fully utilized. Therefore, the utilization rate of uplink resources is increased.

Description

technical field [0001] The present invention relates to a wireless communication system, and more specifically relates to a method for multiplexing multiple types of uplink information on an uplink channel in an LTE carrier aggregation system. Background technique [0002] In the Long Term Evolution (LTE) system, downlink data is transmitted based on Hybrid Automatic Repeat Request (HARQ) technology. Correspondingly, after receiving the data from the base station, the user equipment (UE) needs to feed back HARQ-ACK information accordingly. That is, the feedback ACK indicates that a transport block (TB) has been received successfully, while the feedback NACK indicates that the TB has failed to receive. The HARQ-ACK information of the UE can also be discontinuous transmission (DTX), which means that the UE has not received the downlink scheduling signaling (DL grant) from the base station. resources, but the UE has not received the DL grant from the base station. In order to...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/18H04L5/00H04W72/04H04W72/12
CPCH04L1/0023H04L1/1896H04L5/0055H04L5/0057H04W72/0446H04W72/21
Inventor 李迎阳孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT
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