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Method and user equipment for feeding information back to network side

A technology for user equipment and feedback information, which is applied in wireless communication, using return channels for error prevention/detection, access restrictions, etc., and can solve problems such as large amount of information and occupied resources

Inactive Publication Date: 2013-07-10
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the cell information fed back by the UE to the network side includes not only the channel information of the primary serving cell, but also the channel information of other cells. The amount of feedback information is relatively large, and more resources are occupied.

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  • Method and user equipment for feeding information back to network side
  • Method and user equipment for feeding information back to network side
  • Method and user equipment for feeding information back to network side

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0032] In the prior art, the UE needs to feed back the channel information of all the cells in the CoMP cooperating group to the network side. However, although some cells are included in the CoMP cooperating group due to their large RSRP value, the cell may be in the main serving group. There is no data to be sent on the time-frequency resources used by the UE in the cell, or although there is data to be sent, the data is precoded and points to a direction with less interference to specific users in the primary serving cell. The UE in the cell does not have much interference, so the UE in the primary serving cell does not need to feed back the channel information of the cell.

[0033] Since each cell precodes the data and the DMRS sequence uniformly, t...

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Abstract

The embodiment of the invention discloses a method and user equipment for feeding information back to a network side. The method for feeding information back to the network side comprises the steps: the UE (User Equipment) demodulates DMRS (Data Management and Retrieval System) signals from the received signals according to the positions of the DMRS signals in a coding sequence; the DMRS signals demodulated by the UE are descrambled by utilizing DMRS scrambling sequences of all cells in a CoMP coordination group in which the UE is positioned currently, and the DMRS signals of all the cells inthe coordination group are obtained according to the descrambling result; the power of the DMRS signal of each cell, received by the UE, is calculated, the UE feeds the information of receiving powerof the DMRS signal of each cell back to the network side, and the cell of which the receiving power meets the preset condition is selected by the network side, or the cell of which the receiving power meets the preset condition is directly selected by the UE; and the UE feeds the channel information of the selected cell back to the network side. By applying the method and user equipment for feeding back information to the network side, the feedback quantity of information is reduced, and the network resources are saved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method for feeding back information to a network side and user equipment. Background technique [0002] A Cooperation of MultiPoint (CoMP) coordination group is composed of multiple cells. Each cell in each CoMP coordination group cooperates with each other to provide services for the user equipment (UE). When the UE feeds back cell information to the network side, it needs to send The network side feeds back the information of all the cells included in the CoMP coordination group to which the UE belongs. [0003] In a mobile communication system using a CoMP feedback mechanism, such as an LTE-A (Long Term Evolution–Advanced) system, the UE measures neighbors through the pilot signal CRS (Cell-specific Reference Signals) or CSIRS (Channel State Information-Reference Signals). The Reference Signals Received Power (RSRP) value of the cell feeds back the meas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/08H04W36/30H04W48/20H04W52/24H04L1/16H04L1/00
Inventor 于小红
Owner POTEVIO INFORMATION TECH CO LTD
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