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Method and equipment for reporting channel state information (CSI)

A channel state information and channel technology, applied in transmission path sub-channel allocation, wireless communication, signaling allocation, etc., can solve the problems of feedback information collision, reduce the accuracy of CSI feedback, etc., and achieve the effect of flexible transmission and flexible feedback

Inactive Publication Date: 2014-08-06
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For each CC, an independent CSI needs to be fed back; in order to maintain the ratio of the peak power to the average power of the UE transmitting uplink signals, the CSI feedback is only transmitted in one CC of all CCs in the carrier aggregation, and the hybrid automatic repeat request Acknowledgment (HARQ-ACK) feedback information is also transmitted in this CC, which will lead to collision of CSI and HARQ-ACK feedback information, and when the total number of bits of CSI and HARQ-ACK feedback information exceeds N bits (for example, 20 bits), CSI will be discarded, which reduces the feedback accuracy of CSI in time

Method used

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  • Method and equipment for reporting channel state information (CSI)
  • Method and equipment for reporting channel state information (CSI)
  • Method and equipment for reporting channel state information (CSI)

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples.

[0049] image 3 A flowchart of an embodiment of a method for reporting CSI for this application. Such as image 3 shown, including the following steps:

[0050] Step 301: the UE acquires an instruction instructing the UE to report CSI from the PDCCH that schedules the PDSCH.

[0051] When scheduling the PDSCH data of a certain downlink subframe, the base station needs to send the corresponding PDCCH to realize the scheduling, and the HARQ-ACK feedback information of the PDSCH data is on the PUCCH or PUSCH of the uplink subframe determined according to the timing relationship of HARQ-ACK upload. Based on this, this application proposes that when scheduling the PDSCH of any downlink subframe, the base station can carry an instruction instructing...

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Abstract

Disclosed is a method for reporting channel state information(CSI), first, an instruction instructing a UE to report the CSI are acquired by the UE from a PDCCH scheduling the PDSCH; then, the UE measures the reference signal to give CSI; finally, the UE reports CSI on the PUCCH or the PUSCH transmitting the HARQ-ACK feedback information of the PDSCH. The present application also discloses a device. With the technical solution disclosed in the present application, the flexibility of CSI transmission can be enhanced.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a method and device for reporting channel state information (CSI) in a wireless communication system. Background technique [0002] In the Long Term Evolution Advanced system (LTE-A), CSI reporting is divided into periodic CSI reporting and aperiodic CSI reporting. [0003] Periodic CSI reporting is configured by high-level signaling, that is, the period and time offset of CSI reporting are configured by high-level signaling. The terminal (UE) configures the period and time offset of CSI reporting according to high-level signaling. The CSI is transmitted on the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) of the subframe. For example, assume that the period of CSI reporting configured by high-level signaling is N P , the time offset reported by CSI is N offset , then the UE satisfies the condition Send CSI...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/06H04L1/18
CPCH04W24/10H04L5/0057H04L1/1671H04L1/0031H04L1/0026H04W72/23H04W72/21H04L5/0048
Inventor 付景兴李迎阳孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT
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