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Channel state information transmission method and UE

A technology of channel state information and transmission method, which is applied in the field of channel state information transmission, can solve the problems of CSI unable to transmit transmission performance in time, CSI unable to transmit jointly, decline, etc., to achieve the effect of ensuring transmission efficiency and transmission performance

Active Publication Date: 2018-08-03
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the 5G (fifth generation mobile communication system) technology introduces smaller data scheduling time units and uses higher spectrum resources, due to the Doppler effect, the time selectivity of the channel is enhanced. If the original LTE CSI transmission mode, in different serving cells, the CSI of data scheduling units with different time lengths cannot be jointly transmitted, resulting in CSI not being transmitted in time or transmission performance degradation

Method used

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  • Channel state information transmission method and UE
  • Channel state information transmission method and UE
  • Channel state information transmission method and UE

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment describes the transmission period N of periodic CSI p , N p The time unit U p implementation situation.

[0059] In this example, U p is the preset time length, such as the time length of a subframe (1ms), at this time the minimum N p is 1ms.

[0060] When the number of PUCCH transmissions in a subframe is k=1, the UE only transmits the PUCCH once in a subframe of 1 ms, U OFFSET1 It is the time length of one subframe, and the position of the PUCCH in the subframe is not limited. The UE may transmit the PUCCH in the entire subframe, or may transmit the PUCCH in a preset time interval in the subframe, for example, transmit the PUCCH in one or more OFDM symbols in the latter part of the subframe. For TDD mode, the configuration shown in Table 1 can be used. For FDD mode, you can use the configuration shown in Table 2, or add some N on the basis of Table 2 p value, such as increasing N p A configuration with a value of 1ms.

[0061] Table 1 TDD CSI...

Embodiment 2

[0073] This embodiment describes the transmission period N of periodic CSI p , N p The time unit U p implementation situation.

[0074] In this example, N p and U p It is configured by RRC layer signaling, or indicated by system information, or preset by a protocol. u p It may also be determined by the PUCCH transmission time interval of the serving cell reported by the transmission period CSI, or may be determined by the number k of transmission times k of the PUCCH of the serving cell in a subframe reported by the transmission period CSI. For example, when the number of times of PUCCH transmission in a subframe is k=M (M is a positive integer), and the UE transmits PUCCH M times in a subframe of 1 ms, then the transmission period of periodic CSI is N p The time unit U p is 1 / M milliseconds, such as image 3 shown. Transmission period N of periodic CSI p The time unit U p It can be configured as a time slot length or a mini-slot (a mini-slot is composed of several ...

Embodiment 3

[0079] This embodiment describes the implementation of the correspondence between periodic CSI and CSI reference resources.

[0080] For periodic CSI reporting, the periodic CSI report of a serving cell may be transmitted in the serving cell. At this time, the periodic CSI transmission period N p The time unit U p , the time offset N of the time domain position of CSI relative to the first reference point OFFSET1 The time unit U OFFSET1 and the time offset N of the CSI time domain position relative to the corresponding CSI reference resource time domain position CQI_ref The time unit U CQI_ref can be the same, since uplink transmission and downlink transmission use different subcarrier space sizes, therefore, U p , U OFFSET1 and U CQI_ref It may or may not be the same. This example describes U p , U OFFSET1 and U CQI_ref the same, that is, U p =U OFFSET1 =U CQI_ref time situation. According to different values ​​of the time unit U of the corresponding relationshi...

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Abstract

The invention discloses a channel state information transmission method. The channel state information transmission method comprises the steps of determining a CSI transmission configuration information, wherein the CSI transmission configuration information comprises transmission number k of a periodic CSI in a sub-frame; and transmitting the CSI based on the CSI transmission configuration information. compared with the prior art, the channel state information transmission method guarantees the transmission efficiency and transmission performance of the UCI in a spectrum resource environmentwith a higher 5G technology as a smaller data scheduling time unit is introduced and a smaller CSI reporting period is configured. In addition, the invention also discloses UE used for channel state information transmission.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, to a method for transmitting channel state information and user equipment. Background technique [0002] UCI (Uplink Control Information, uplink control information) in LTE includes CSI (ChannelState Information, channel state information), HARQ-ACK (Hybrid Automatic Retransmission Request-Acknowledgment, hybrid automatic retransmission request response) and SR (Scheduling Request, scheduling request) . Wherein, the CSI is information that the base station requires a UE (User Equipment, user equipment) to report in order to obtain the quality of the downlink channel. The base station sends CSI reference resources in the downlink transmission (from the base station to the UE), and after the UE measures the CSI reference resources, it feeds back CSI to the base station in the uplink transmission (from the UE to the base station). The CSI reference res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04B7/06
CPCH04B7/0626H04L1/0023H04L1/0675H04L1/0026H04L1/0027H04L5/0057H04W24/08H04L1/0687H04L5/0053H04W72/0446H04W72/21
Inventor 付景兴喻斌钱辰熊琦张英杰苏笛
Owner BEIJING SAMSUNG TELECOM R&D CENT