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Base station and its method of notifying trigger mode of aperiodic channel state information report

A technology of channel state information and trigger mode, which is applied in wireless communication, transmission modification based on link quality, and signaling as a feature, and can solve the problem of inflexible aperiodic CSI feedback trigger mode

Active Publication Date: 2015-08-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The technical problem to be solved by the present invention is to provide a technology for the base station to notify the trigger mode of the aperiodic channel state information report, so as to solve the problem that the trigger mode of the aperiodic CSI feedback in the prior art is not flexible enough

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  • Base station and its method of notifying trigger mode of aperiodic channel state information report
  • Base station and its method of notifying trigger mode of aperiodic channel state information report
  • Base station and its method of notifying trigger mode of aperiodic channel state information report

Examples

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Embodiment 1

[0279] In the FDD system, the base station activates a pair of master component carriers DL CC0 and UL CC0, a pair of slave component carriers DL CC1 and UL CC1, and two downlink slave component carriers DL CC2 and DL CC3 (the corresponding uplink slave The component carriers UL CC2 and UL CC3 are not configured or activated).

[0280] The trigger modes of the aperiodic CSI feedback are the above three trigger modes (1), (2) or (4). And for trigger mode (4), the preset component carrier group is configured based on UE (UE specific), and only one group (component carrier group Y) is configured, which is DL CC2 and DL CC3.

[0281] The trigger command to trigger aperiodic CSI report in PDCCH DCI format 4 is 2bits:

[0282] The "00" state corresponds to not triggering aperiodic CSI reporting;

[0283] The "01" state corresponds to triggering aperiodic CSI reporting, and is trigger mode (1);

[0284] The "10" state corresponds to triggering aperiodic CSI reporting, and it is th...

Embodiment 2

[0298] In the FDD system, the base station activates a pair of master component carriers DL CC0 and UL CC0, a pair of slave component carriers DL CC1 and UL CC1, and two downlink slave component carriers DL CC2 and DL CC3 (the corresponding uplink slave The component carriers UL CC2 and UL CC3 are not configured or activated).

[0299] The trigger mode of the aperiodic CSI feedback is the above trigger mode (1) or (4). And for the trigger mode (4), the preset component carrier group is configured based on UE (UE specific), and two groups (component carrier group Y and component carrier group Z) are configured, respectively DL CC1 and DL CC2 , and DL CC0 and DL CC3.

[0300] The trigger command to trigger aperiodic CSI report in PDCCH DCI format 4 is 2bits:

[0301] The "00" state corresponds to not triggering aperiodic CSI reporting;

[0302] The "01" state corresponds to triggering aperiodic CSI reporting, and is trigger mode (1);

[0303] The "10" state corresponds to tr...

Embodiment 3

[0309] In the FDD system, the base station activates a pair of master component carriers DL CC0 and UL CC0, a pair of slave component carriers DL CC1 and UL CC1, and two downlink slave component carriers DL CC2 and DL CC3 (the corresponding uplink slave The component carriers UL CC2 and UL CC3 are not configured or activated).

[0310] The trigger modes of the aperiodic CSI feedback are the above three trigger modes (1), (2) or (4). And for the trigger mode (4), the preset component carrier group is configured based on the uplink component carrier activated by the UE, and only one group is configured, DL CC0 and DL CC3 for UL CC0, and DL CC1 for UL CC1 and DL CC2.

[0311] The trigger command to trigger aperiodic CSI report in PDCCH DCI format 4 is 2bits:

[0312] The "00" state corresponds to not triggering aperiodic CSI reporting;

[0313] The "01" state corresponds to triggering aperiodic CSI reporting, and is trigger mode (1);

[0314] The "10" state corresponds to tri...

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Abstract

The present invention discloses a base station and its method for notifying the triggering mode of aperiodic Channel State Information (CSI) reporting, in order to solve the problem that the triggering method of aperiodic CSI feedback is not flexible enough in the prior art. The method includes: the triggering modes of aperiodic CSI reporting and corresponding triggering methods are predefined; the base station chooses one triggering mode from the predefined triggering modes, and chooses corresponding triggering method; the base station notifies a User Equipment (UE) of the chosen triggering mode by means of the chosen triggering method; wherein the chosen triggering method includes at least one of a triggering command, Physical Downlink Control Channel (PDCCH) Downlink Control Information (DCI) format including the triggering command, PDCCH search space including the triggering command, a higher layer parameter and higher layer signaling. The present invention solves the problem that the triggering method of aperiodic CSI reporting is not flexible enough in the prior art, thereby saving triggering signaling overhead and transmission overhead, and avoiding the waste of system resources.

Description

technical field [0001] The present invention relates to aperiodic channel state information (Channel State Information, CSI) report in the field of communication, in particular to a base station and a method for notifying a trigger mode of aperiodic CSI report. Background technique [0002] In the 3rd Generation Partnership Project Long Term Evolution (The 3rd Generation Partnership Project Long Term Evolution, 3GPP LTE), the user equipment (User Equipment, UE) obtains the channel state information (ChannelState Information) of the downlink channel according to the downlink reference signal (reference signal) , CSI), the obtained CSI is fed back 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. [0003] In the LTE system, CSI includes three forms: channel quality indication (Channels Quality Indi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04H04W28/16H04L1/06
CPCH04L1/0027
Inventor 朱鹏戴博梁春丽杨维维喻斌
Owner ZTE CORP
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