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Trigger method and base station for aperiodic channel state information report

A channel state information and non-periodic technology, applied in the field of communication, can solve the problem of inflexible aperiodic CSI report triggering methods, and achieve the effects of saving trigger signaling overhead, reducing trigger delay, and saving transmission overhead

Active Publication Date: 2016-06-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The main purpose of the present invention is to provide a triggering method and base station for aperiodic channel state information report, so as to at least solve the above-mentioned problem that the triggering method of the existing aperiodic CSI report is not flexible enough

Method used

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  • Trigger method and base station for aperiodic channel state information report
  • Trigger method and base station for aperiodic channel state information report
  • Trigger method and base station for aperiodic channel state information report

Examples

Experimental program
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Effect test

Embodiment 1

[0047] In the FDD system, in the PDCCH with a specific downlink control information format, when CQIrequest=1, and the PDCCH schedules the user equipment to send PUSCH on its uplink primary component carrier PCC, the user equipment is triggered to feed back a group of aperiodic downlink component carriers CSI report. Wherein, the set of downlink component carriers in this embodiment includes: the downlink primary component carrier of the user equipment, and the corresponding uplink component carrier among the downlink secondary component carriers configured or activated by the current user equipment is unconfigured or unavailable for the user equipment. Activated downlink secondary component carrier (if there is such a downlink secondary component carrier).

[0048] Otherwise, when CQIrequest=1 and the PDCCH schedules the user equipment to send PUSCH on its uplink secondary component carrier SCC, the user equipment is triggered to feed back the aperiodic CSI report of the down...

Embodiment 2

[0053] In the FDD system, the base station configures or activates a pair of primary component carriers DLCC0 and ULCC0, a pair of secondary component carriers DLCC1 and ULCC1, and two downlink secondary component carriers DLCC2 and DLCC3 (the corresponding uplink secondary component carriers ULCC2 and ULCC3) for user equipment. ULCC3 is not configured or activated). Wherein, the higher layer configures DLCC0 and DLCC2 as a group of component carriers; DLCC1 and DLCC3 as a group of component carriers.

[0054] If in a subframe, when the user equipment detects a PDCCH belonging to it with a specific downlink control information format, the PDCCH schedules the user equipment to send PUSCH on ULCC0, and where CQIrequest=1, then the user equipment is triggered to feed back DLCC0 and aperiodic CSI reporting for DLCC2.

[0055] If in a subframe, when the user equipment detects a PDCCH belonging to it with a specific downlink control information format, the PDCCH schedules the user ...

Embodiment 3

[0057] In the FDD system, the base station configures or activates a pair of primary component carriers DLCC0 and ULCC0, a pair of secondary component carriers DLCC1 and ULCC1, and two downlink secondary component carriers DLCC2 and DLCC3 (the corresponding uplink secondary component carriers ULCC2 and ULCC3) for user equipment. ULCC3 is not configured or activated). Wherein, the higher layer configures DLCC0 and DLCC2 as a group of component carriers; DLCC1 and DLCC3 as a group of component carriers.

[0058] When the base station configures a trigger command to trigger the user equipment to feed back an aperiodic CSI report of a component carrier:

[0059] If in a subframe, when the user equipment detects a PDCCH belonging to it with a specific downlink control information format, the PDCCH schedules the user equipment to send PUSCH on ULCC0, and where CQIrequest=1, then the user equipment is triggered to feed back DLCC0 Aperiodic CSI reporting.

[0060] If in a subframe, wh...

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Abstract

The present invention discloses a method for triggering an aperiodic channel state information report and a base station, wherein the method includes: the base station sends a physical downlink control channel (PDCCH) with an aperiodic CSI report trigger command to user equipment, and when the trigger command When the aperiodic CSI report is triggered, the PDCCH is used to instruct the user equipment to feed back the aperiodic CSI report of the specified component carrier. Through the present invention, the flexibility of triggering the aperiodic channel state information CSI report is improved, the trigger delay of the aperiodic channel state information CSI report is reduced, and the triggering signaling overhead and transmission overhead are saved.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method for triggering an aperiodic channel state information report and a base station. Background technique [0002] In the 3rd Generation Partnership Project Long Term Evolution system (The3rdGenerationPartnershipProjectLongTermEvolution, 3GPPLTF), the user equipment (UserEquipment, UE) obtains the channel state information (ChannelStateInformation, CSI) of the downlink channel according to the downlink reference signal (reference signal), and then, the obtained CSI Feedback to the base station (eNodeB, eNB). According to the CSI fed back by the UE, the base station determines the modulation and coding scheme, the location of the physical resource, and the transmission mode of the data sent to the UE. In the LTE system, CSI includes three forms: channel quality indication (Channels Quality Indication, CQI), precoding matrix indication (Pre-codingMatrixIndicator, PMI), r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04W72/12
CPCH04W24/10H04L5/0053
Inventor 朱鹏戴博杨维维梁春丽喻斌
Owner ZTE CORP
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