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Base station and method for informing trigger patterns of non-periodic channel state information (CSI) reports thereof

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: 2011-04-06
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

Method used

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  • Base station and method for informing trigger patterns of non-periodic channel state information (CSI) reports thereof
  • Base station and method for informing trigger patterns of non-periodic channel state information (CSI) reports thereof
  • Base station and method for informing trigger patterns of non-periodic channel state information (CSI) reports thereof

Examples

Experimental program
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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 invention discloses a base station and a method for informing trigger patterns of non-periodic channel state information (CSI) reports thereof, which solves the problem that in the prior art, the trigger mode of the non-periodic CSI feedback is not flexible. In the method, trigger patterns of non-periodic CSI reports and corresponding trigger modes are predefined. The method comprises the following steps: the base station selects one trigger pattern from the predefined trigger patterns and selects the corresponding trigger mode; and the base station informs the selected trigger pattern to user equipment (UE) through the selected trigger mode, wherein the predefined trigger mode comprises at least one of a trigger command, a DCI format of a physical downlink control channel (PDCCH) containing the trigger command, a search space of the PDCCH containing the trigger command, a high-level parameter and a high-level signaling. The invention solves the problem that the trigger mode of the non-periodic CSI report is not flexible in the prior art, saves the signaling triggering cost and the transmission cost, and avoids 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 Applications(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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