Method and user equipment (UE) for measuring and feeding back channel quality

A channel quality measurement and user equipment technology, applied in the field of channel quality measurement feedback method and user equipment, can solve the performance impact of link adaptation, incomplete RSRP and/or RSRQ information, inability to distinguish cell edge users and RLF, etc. problem, to achieve the effect of good link adaptation and improved throughput

Active Publication Date: 2011-03-16
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a channel quality measurement method and user equipment, which are used to solve the problem that RSRP and / or RSRQ information cannot be distinguished from cell edge users and RLF due to incomplete RSRP and / or RSRQ information, and that only one channel is fed back in related technologies. The performance of link adaptation caused by CQI will be affected to a certain extent

Method used

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  • Method and user equipment (UE) for measuring and feeding back channel quality
  • Method and user equipment (UE) for measuring and feeding back channel quality
  • Method and user equipment (UE) for measuring and feeding back channel quality

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Embodiment 1

[0049] In this embodiment, a processing method for channel quality measurement is provided, figure 1 is a flowchart of a processing method for channel quality measurement according to an embodiment of the present invention, such as figure 1 As shown, the process includes the following steps:

[0050] Step S102, the user equipment performs measurements on subframes corresponding to different degrees of adjacent cell interference in the serving cell to which it belongs;

[0051] The measurement on the subframe may be to measure the common reference signal of the serving cell or the common reference signal of the interfering cell on one or several time domain symbols of the subframe, or measure the All received signals are measured.

[0052] Step S104, the user equipment acquires channel quality information of different levels of adjacent cell interference through the measurement, and the channel quality information includes one or more of the following information: RSRP, RSRQ,...

Embodiment 2

[0068] In this embodiment, the UE measures the received signal resources from each cell on the subframe where the coordinated neighbor cell is the serving cell of the ABS, and obtains one or more of the following channel quality information: RSRP1, RSRQ1, CQI1 . The UE measures the received signal resources from each cell on the subframe where the coordinated neighbor cell is a non-ABS serving cell, and obtains one or more of the following channel quality information: RSRP2, RSRQ2, and CQI2.

[0069] The UE feeds back at least one of RSRP1, RSRQ1, and CQI1 and at least one of RSRP2, RSRQ2, and CQI2 to the sending end, where the sending end includes: a macro cell base station or a low-power node.

[0070] Preferably, the UE can also use the following formula to calculate the difference between RSRP / RSRQ / CQI: ΔCQI=CQI2-CQI1; ΔRSRP=RSRP2-RSRP1; ΔRSRQ=RSRQ2-RSRQ1. The UE feeds back the CQI1 / RSRP1 / RSRQ and ΔCQI / ΔRSRP / ΔRSRQ to the sending end, and the sending end includes: a macro ...

Embodiment 3

[0073] In this embodiment, the UE obtains RSRQ1 and / or CQI1 by measuring received signal resources from each cell on a subframe in which the coordinated neighbor cell is the serving cell of the ABS. The UE measures the received signal resources from each cell on the subframe where the coordinated neighboring cell is the serving cell of the non-ABS, and obtains RSRQ2 and / or CQI2.

[0074] The UE feeds back one of the channel quality information RSRQ1 and CQI1 and RSRQ2 and CQI2 to the sending end, and the sending end includes: a macro cell base station or a low power node. The transmitting end may use the following formula to calculate the other of RSRQ2 and CQI2 according to RSRQ1 and CQI1, and one of RSRQ2 and CQI2. For example, CQI2=CQI1+(RSRQ2-RSRQ1); RSRQ2=RSRQ1+(CQI2-CQI1).

[0075] Preferably, the UE feeds back one of the channel quality information RSRQ1 and CQI1 and ΔRSRQ2 and ΔCQI2 to the sending end, where the sending end includes: a macro cell base station or a low...

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Abstract

The invention discloses a method and user equipment (UE) for measuring and feeding back channel quality, which is used for solving the problem that a cell edge user (CEU) and a radio link failure (RLF) can not be distinguished accurately caused by incomplete reference signal receiving power (RSRP) and/or reference signal receiving quality (RSRQ) information and the problem of certain influence on link adaptive performance caused by only feeding back one channel quality indication (CQI) in the prior art. According to the technical scheme of the invention, the UE measures and feeds back the RSRP and/or RSRQ information and channel quality indication (CQI) information of subframes which are almost fully empty subframes corresponding to strong interference neighbor cells and the RSRP and/or RSRQ and channel quality indication (CQI) information of subframes which are normally transmitted subframes corresponding to the strong interference neighbor cells, thereby solving the problem of accurately distinguishing a cell center user (CCU) and the CEU in a heterogeneous network and preventing the RLF phenomenon. In addition, the invention can enable users to obtain better link adaptability according to the CQI of different types of subframes when data is transmitted on different subframes, thereby improving the system throughput.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel quality measurement feedback method and user equipment. Background technique [0002] Statistics show that in the future 80% to 90% of system throughput will occur in indoor and hotspot scenarios. However, the traditional cellular network technology has the characteristics of "emphasis on outdoor, less on indoor", "emphasis on cellular networking, less on isolated hotspots", "emphasis on mobile switching, less on fixed nomadic" and so on. One of the key points of work of the advanced long-term evolution system (Long-Term Evolution Advance, LTE-Advance) is to optimize indoor and hotspot scenarios. Heterogeneous networks (heterogeneous networks), as a technology that significantly increases system throughput and improves overall network efficiency, can well meet the requirements set forth by LTE Advance. The heterogeneous network structure introduces some transmitting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/16
Inventor 薛妍李儒岳邬华明
Owner ZTE CORP
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