Method and device for channel information feedback in coordinated multi-point transmission
A technology of channel information and multi-point coordination, applied in transmission systems, radio transmission systems, location diversity, etc., can solve problems such as insufficient resources, no design and discussion of service cell allocation, etc.
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Embodiment 1
[0078] This embodiment is directed to the feedback mode A. In this feedback mode, the base station allocates multiple subframes to jointly complete the feedback of channel information of all cells in the COMP measurement set, and each subframe only maps channel quality information of one cell. Based on feedback method A, the feedback process of channel information is as follows: figure 1 As shown, the specific steps are as follows:
[0079] Step 101: The eNB notifies the UE of which coordinated cells or which cells in the measurement set to feed back the channel information (that is, the range of the measurement set) and which coordinated cell to feed back in which subframe through the physical downlink control channel (PDCCH) or high-level signaling Or measure the channel information of the cells in the measurement set, and map the channel information of the coordinated cell or the cells in the measurement set on which or which resources of the subframe;
[0080] Step 102: ...
Embodiment 2
[0086] This embodiment is aimed at method B. In this feedback method, the base station allocates a subframe for feeding back channel information of all coordinated cells or all cells in the measurement set. Using this method, the minimum delay can be guaranteed, and faster multiplexing can be performed. Click Collaboration Process. This way needs to increase the feedback overhead of one uplink subframe, and needs to expand the relevant feedback content of the original R8 and R9. The extended method can be:
[0087] Figure 6 For the present invention, the content generation process of feeding back the channel information of the coordinated cell or the cell channel information in the measurement set on the PUSCH is as follows:
[0088] Step 601, calculating the number of bits of channel information of each coordinated cell or a cell in a measurement set;
[0089]
[0090] Among them, O is the number of bits of channel information of each coordinated cell or the cell in th...
Embodiment 3
[0100] This embodiment is aimed at mode B. In this feedback mode, the base station allocates a subframe for feeding back the channel information of all coordinated cells or all cells in the measurement set, which requires an increase in the feedback overhead of an uplink subframe, and requires R8 and R9 The content of the feedback will be expanded. The extended method can be:
[0101] Figure 7 For this embodiment, the content generation process of feeding back the channel information of the coordinated cell or the cell channel information in the measurement set on the PUSCH is as follows:
[0102] Step 701, calculating the total number of channel information bits of the coordinated cell or the cell in the measurement set;
[0103]
[0104] Wherein O is the number of bits of the total channel information of the coordinated cell or the cells in the measurement set; Q' is the number of channel information bits to be transmitted on the PUSCH; and L is the number of check b...
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