Processing method, device and system for channel quality indicator

A technology of channel quality indication and processing method, which is applied in the field of channel quality indication CQI processing, and can solve the problems of undefined and inability to apply narrowband UECQI feedback.

Inactive Publication Date: 2013-09-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The CQI feedback method in the existing LTE system is the definition of the CQI feedback method for the broadband UE, but in the prior art, the narrowband UE can only receive and measure the CQI on the dedica...

Method used

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  • Processing method, device and system for channel quality indicator
  • Processing method, device and system for channel quality indicator
  • Processing method, device and system for channel quality indicator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The CQI processing method provided by the embodiment of the present invention, such as figure 1 As shown, the method is applied in a scenario where the user equipment UE cannot receive the broadband physical downlink control channel PDCCH, nor can it receive the broadband physical downlink shared channel PDSCH, and the method steps include:

[0053] S101. According to the preset measurement gap, the UE calculates the CQI after measuring the reference signal on the specified non-current resident subband in the measurement gap; the measurement gap is any specified time period before the opportunity to feed back the CQI, and During the measurement gap, the base station will not schedule downlink on the subband where the UE is currently camped; where the UE's camped subband refers to the dedicated working frequency band selected by the UE when it initially accesses, or not The base station needs to specifically instruct and defaults to the operating frequency band when the ...

Embodiment 2

[0066] The channel quality CQI processing method provided by the embodiment of the present invention is applied to a scenario where the user equipment UE cannot receive the broadband physical downlink control channel PDCCH, nor can it receive the broadband physical downlink shared channel PDSCH, and the method steps include:

[0067] S11. According to the preset measurement gap, the UE calculates the CQI after measuring the reference signal on the specified non-current resident subband in the measurement gap; the measurement gap is any specified time period before the opportunity to feed back the CQI, and During the measurement gap, the base station will not schedule downlink on the subband where the UE is currently camped; where the UE's camped subband refers to the dedicated working frequency band selected by the UE when it initially accesses, or not The base station needs to specifically instruct and defaults to the operating frequency band when the UE receives downlink data...

Embodiment 3

[0092] The channel quality CQI processing method provided by the embodiment of the present invention, such as Figure 5 As shown, the method is applied in a scenario where the user equipment UE can receive the broadband physical downlink control channel PDCCH, but cannot receive the broadband physical downlink shared channel PDSCH, and the method steps include:

[0093] S501. The UE measures the CQI of the reference signal on the system broadband control channel resource domain. Wherein, the system broadband control channel resource domain refers to the resource domain that occupies the entire system bandwidth in the frequency domain and occupies the first several OFDM symbols in the time domain.

[0094] Specifically, the UE measures the CQI of the reference signal on the system broadband control channel resource domain. The measurement method of the broadband UE in the prior art is used for the measurement, and the present invention will not repeat it here.

[0095] S502. ...

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Abstract

The invention discloses a processing method, device and system for a channel quality indicator, and relates to the field of communications. In the application scenario that user equipment can only receive reference signals on a part of a system frequency band in one transmission time interval, CQI measuring and CQI feedback of the UE are achieved, and the using range of the CQI measuring and the using range of the CQI feedback of the UE are widened. The method includes the steps that according to a preset measuring interval, the UE measures the reference signals on an appointed non-current-lingering sub-band in the measuring interval, then CQI is calculated, the calculated CQI is fed back to a base station, the measuring interval is any appointed time quantum before the time when the CQI is fed back, and the base station will not perform dispatching downlink on the sub-band where the UE currently lingers in the measuring interval, wherein the sub-band where the UE lingers is a special working frequency band selected when the UE is initially connected in, or the working frequency band when the UE receives downlink data is defaulted without special instructions of the base station. The processing method, device and system for channel quality indicator is used for the CQI measuring and the CQI feedback in the scenario.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel quality indicator (CQI) processing method, device and system. Background technique [0002] In the 3GPP Long Term Evolution (LTE for short) system, the principle and process of UE (User Equipment, user terminal) feeding back CQI (Channel Quality Indicator, channel quality indicator) is: The pilot signal is measured, and the PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) / PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) is selected periodically / aperiodically to feed back the CQI measurement report, and the network side is based on the CQI measurement report fed back by the UE In combination with the current network resource situation, it is determined whether it is necessary to adjust the UE's modulation mode, resource allocation, and MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) related configuratio...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/16H04W24/00
CPCH04L5/008H04L1/0026H04L5/0007H04L5/0037H04L5/0048H04L5/0057
Inventor 夏金环
Owner HUAWEI TECH CO LTD
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