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Physical uplink control channel (PUSCH)-based channel state information (CSI) reporting method and device

A mode configuration, full-bandwidth technology, applied in the field of communication, can solve the problem of unsuitable PUSCH reporting mechanism

Active Publication Date: 2011-11-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the existing single-codebook-based CSI reporting mechanism does not distinguish between long-term / broadband CSI and short-term / frequency-selective CSI, and is not suitable for the dual-codebook-based PUSCH reporting mechanism specified in Rel-10. Therefore, it is necessary to provide A new PUSCH reporting mechanism to achieve accurate reporting of long-term / broadband CSI and short-term / frequency selective CSI

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  • Physical uplink control channel (PUSCH)-based channel state information (CSI) reporting method and device

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Embodiment Construction

[0023] Referring to the relevant regulations of Rel 10, in order to realize accurate reporting of CSI based on dual codebooks, in the embodiment of the present invention, a CSI reporting mechanism based on PUSCH is proposed, which is applicable to the precoding process using two-level codebooks. Under this mechanism, the UE can report long-term / wideband CSI (including PMI and / or corresponding CQI information) to the network side (e.g., eNB) through PUSCH, and report short-term / frequency selective CSI of a specified frequency band subset to the network side through PUSCH (including PMI and / or corresponding CQI information.

[0024] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] refer to figure 1 As shown, in the embodiment of the present invention, the apparatus (for example, UE) for reporting CSI based on PUSCH includes a first communication unit 10, a processing unit 11 and a second pro...

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Abstract

The invention discloses a physical uplink control channel (PUSCH)-based channel state information (CSI) reporting method and a PUSCH-based CSI reporting device, which are used for realizing the accurate reporting of CSI based on double codebooks. The method comprises the following steps of: receiving CSI reporting mode configuration signaling from a network side, wherein the CSI reporting mode configuration signaling at least carries a given reporting mode identifier; forming first CSI for a full system bandwidth according to a reporting type corresponding to the reporting mode identifier; dividing the full system bandwidth into at least two frequency band subsets, and forming second CSI for a given frequency band subset according to the reporting type corresponding to the reporting mode identifier; and when reporting indication signaling is received from the network side, transmitting the first and second CSI to the network side. Therefore, the UE can combine long-term / broadband CSI and short-term / frequency selectivity CSI to further realize a two-stage feedback mechanism based on the double codebooks of a PUSCH. The invention simultaneously discloses a PUSCH-based CSI reporting device.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for reporting CSI based on PUSCH. Background technique [0002] In a point-to-point communication system, if the base station can obtain certain channel state information (ChannelState Information, CSI), it can optimize the modulation mode, coding rate and spatial distribution characteristics of the signal power of the transmitted downlink signal, so that the transmitted The downlink signal matches the propagation characteristics of the channel, so as to achieve the effect of enhancing the reliability of signal reception and reducing the complexity requirements of the reception algorithm. Especially in multi-user application scenarios, the base station can make scheduling decisions based on the CSI it obtains, thereby realizing Improvement of system spectrum efficiency and avoidance of interference between cells. [0003] Currently, Long-Term Evolution (LTE)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/00
CPCH04L2025/03426H04L5/0091H04L5/0057H04B7/0643H04B7/0639H04L25/03343H04L1/0028H04L1/0026H04L5/0053H04B7/0632H04L1/0027H04B7/0634H04L1/0031
Inventor 苏昕缪德山张然然荆梅芳高秋彬孙韶辉肖国军拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD