Method and device for feeding back channel state information reports
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A channel state information and reporting technology, applied in the field of communication, can solve the problem of high signaling overhead
Active Publication Date: 2014-01-15
ZTE CORP
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[0011] In view of the relatively large signaling overhead of the CSI feedback method in the rela...
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Embodiment 1
[0161] This preferred embodiment provides a signaling method for configuring aperiodic feedback, which can improve the flexibility of aperiodic feedback in multiple cells, reduce feedback overhead, and improve system performance. Figure 7 is a flowchart of aperiodic feedback of multi-cell CSI according to an embodiment of the present invention, such as Figure 7 As shown, the method includes the following steps S702 and S708:
[0162] Step S702: The base station can configure multiple groups of CSI reports and notify the UE of the configuration parameters of each group through high-level signaling, wherein the configuration parameters of each group of CSI reports include resource configuration information of CSI-RS resources used for channel measurement and at least one of the following:
[0163] Allocation information of one or more interference measurement resources corresponding to each CSI-RS resource;
[0164] and information indicating a correspondence between CSI-RS ...
Embodiment 2
[0186] This preferred embodiment provides a configuration signaling method for aperiodic feedback, Figure 8 It shows that the base station configures three CSI-RS resources to be measured and two interference measurement resources for the UE.
[0187] In this embodiment, the base station configures three CSI-RS resources 1, 2 and 3 to be measured for the UE through high-level signaling, and notifies two interference measurement resources 1 and 2 at the same time. The configuration parameters include each CSI-RS resource The number of ports, CSI-RS configuration, subframe period and offset of CSI-RS, and the power ratio Pc of data RE, etc., also include the bit sequence indicating the position of the interference measurement resource in the RB, the subframe period of the interference resource and offset etc. In addition, the base station side uses 3 bits among multiple bits, for example, 3 bits s1, s2, s3 among 8 bits [s1 s2 s3 s4 s5 s6 s7 s8] indicate, or only 3 bits [s1 s2 ...
Embodiment 3
[0194] This preferred embodiment provides a configuration signaling method for aperiodic feedback, Figure 8 It shows that the base station configures three CSI-RS resources to be measured and two interference measurement resources for the UE.
[0195] In this embodiment, the difference from the preferred embodiment 2 is that in the configuration of bit indication of each CSI request field, the corresponding relationship between [s1 s2 s3] and [n1 n2 n3] is notified by high-level signaling or predefined , so there is no need to notify [n1 n2 n3] to indicate the corresponding relationship between UE [s1 s2 s3] and [n1 n2 n3].
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Abstract
The invention discloses a method and a device for feeding back channel state information reports. The method includes the following steps that: a base station configures parameters of a plurality of groups of channel state information (CSI) reports; and the base station informs UE about the parameters of the plurality of groups of channel state information (CSI) reports and instructs the UE to feed back the channel state information (CSI) reports of a predetermined group. The parameters of each group of channel state information (CSI) reports in the plurality of groups of channel state information (CSI) reports comprise a resource allocation parameter of one or a plurality of channel state information reference signal (CSI-RS) resources which are used for channel measurement. The parameters of each group of channel state information (CSI) reports in the plurality of groups of channel state information (CSI) reports further comprise one of the following parameters: distribution information of one or a plurality of interference measurement resources corresponding to each channel state information reference signal (CSI-RS) resource in one or the plurality of channel state information reference signal (CSI-RS) resources; a parameter which is used for indicating the corresponding relationship between one or the plurality of channel state information reference signal (CSI-RS) resources and the interference measurement resources; a parameter which is used for indicating the corresponding relationship between the channel state information reference signal (CSI-RS) resources and channel state information reference signal (CSI-RS) resources used for interfering calculation; and/or a parameter used for indicating the corresponding relationship between one or a plurality of channel state information reference signal (CSI-RS) resources and component carriers in carrier aggregation.
Description
technical field [0001] The present invention relates to the communication field, and in particular, relates to a feedback method and device for a channel state information (Channel State Information, CSI for short) report. Background technique [0002] In order to improve the data throughput of edge users who suffer from large inter-cell interference in the cellular network, Cooperate Multiple Point (CoMP) technology is proposed in the study of Long Term Evolution (LTE) system. The CoMP technology includes Joint Transmission (JT), that is, multiple transmitting nodes (TP) transmit data for the user equipment (UE) on the same time-frequency resource through space cooperation to increase signal power while reducing interference and improve UE performance. Receive Signal-to-Interference-to-Noise Ratio (SINR) to improve user performance at the cell edge. [0003] The UE side usually needs to measure the channel state information (Channel State Information, CSI) of each cooperat...
Claims
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