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Channel state information processing method and user equipment

A channel state information and user equipment technology, applied in channel estimation, transmission path sub-channel allocation, wireless communication, etc., can solve problems affecting system performance, lack of cooperation, performance impact, etc., and achieve the effect of improving the quality of channel estimation

Active Publication Date: 2016-01-20
ZTE CORP
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  • Claims
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Problems solved by technology

Therefore, if only one CQI is fed back, good link adaptation cannot be achieved, which will affect system performance. In the end, there may or may not be cooperation among cells. Therefore, if only one CQI is fed back, this CQI can only be based on The coordinated CQI can only be based on the CQI without coordination, or in the heterogeneous network, the CQI can only be based on the CQI with the interference of the coordinated cell or the CQI without interference, but this CQI must also support the transmission with coordination or without For the transmission during cooperation, the CQI of the two transmissions will be different to some extent, so if there is only one CQI, the performance of link adaptation will be affected to a certain extent

Method used

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  • Channel state information processing method and user equipment
  • Channel state information processing method and user equipment
  • Channel state information processing method and user equipment

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Embodiment 1

[0022] In this embodiment, a method for processing channel state information is provided, figure 1 is a flowchart of a method for processing channel state information according to an embodiment of the present invention, such as figure 1 As shown, the process includes the following steps:

[0023] Step S102, the user equipment measures the channel when there is cooperation on the resource of the channel state information reference signal of silent muting for the cooperative neighbor cell;

[0024] Step S104, the user equipment obtains a first channel quality indicator CQI according to the measurement of the channel when there is cooperation.

[0025] Through the above steps, the estimation quality of the channel state information reference signal of the coordinated cell by the mobile terminal can be improved by not sending data on the resource elements of the channel state information reference signal of the coordinated cell.

[0026] Preferably, the user equipment measures t...

Embodiment 2

[0038] In this embodiment, the UE measures the channel when there is no coordination for the non-muted reference signal resources of the coordinated neighboring cells, and obtains the first channel quality indicator CQI1 based on this measurement. The UE measures the channel when there is cooperation on the reference signal resource that is silent for the coordinated neighbor cell, and obtains the second channel quality indicator CQI2 based on this measurement. It should be noted that, in this embodiment, CQI2 corresponds to the first CQI in Embodiment 1, and in this embodiment, CQI1 corresponds to the second CQI in the embodiment.

[0039] The UE feeds back the two channel quality indicators CQI1 and CQI2 to the sending end, where the sending end includes: a macro cell base station or a low power node.

[0040] Preferably, the UE can also use the following formula to calculate the difference ΔCQI between CQI1 and CQI2: ΔCQI=CQI2-CQI1. The UE feeds back the two channel qualit...

Embodiment 3

[0043] In this embodiment, the system in the coordinated transmission may be a coordinated multi-point transmission (COMP) system, and the coordinated base station in the COMP system can also support the technology of partial CSI-RS muting.

[0044] This embodiment considers that in a coordinated multi-point transmission system, when a target cell in the coordinated measurement set sends a channel state information reference signal, other cells in the coordinated measurement set only transmit the channel state information reference signal corresponding to the target cell. Data is sent on some physical resource blocks of frequency resources, and no data is sent on other physical resource blocks. Figure 4 is a schematic diagram of sending a channel state information reference signal on a subframe according to an embodiment of the present invention, such as Figure 4 As shown in , it is assumed that the cells in the coordinated measurement set transmit channel state information ...

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Abstract

The present invention discloses a method of processing channel state information and a user apparatus, the method comprising: the user device for the cooperative neighborhood silent muting channel status information reference signal resources, measuring the channel when there is a collaboration; the user device obtains a first channel quality indicator CQI according to the measurement of the channel when there is collaboration. By the present invention can improve the channel status information reference signal channel estimation quality.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method for processing channel state information and user equipment. Background technique [0002] In order to improve the throughput of the cell and perform interference coordination between cells, the Long-Term Evolution advanced system (LTE-Advance for short) may introduce a coordinated transmission technology (Coordihate Multipoint Transmission and Reception, COMP for short) between network levels. In addition, inter-cell interference is generally more serious in a heterogeneous network than in a homogeneous network, and inter-cell interference coordination can also be applied in a heterogeneous network to reduce inter-cell interference. Here, the homogeneous network mainly refers to the configuration scenario where there are only macro base stations eNB (EvolutedNodeBasestation) and users in the network; the heterogeneous network mainly refers to the configuration scenari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04W24/00
CPCH04L25/0202H04L5/0073H04L5/005H04L5/0057H04W24/10H04W24/02
Inventor 李儒岳邬华明薛妍朱常青张峻峰
Owner ZTE CORP
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