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Channel state information feedback method performed by user equipment and user equipment

A technology of channel state information and user equipment, applied in the field of communication, can solve the problem of lack of dynamic support for JT and DPS transmission channel state information feedback methods, etc.

Inactive Publication Date: 2018-07-17
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0061] The purpose of the present invention is to provide a novel channel state information feedback method and user equipment for the lack of a channel state information feedback method that dynamically supports JT and DPS transmission in the prior art

Method used

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  • Channel state information feedback method performed by user equipment and user equipment
  • Channel state information feedback method performed by user equipment and user equipment
  • Channel state information feedback method performed by user equipment and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0102] Scenario of the embodiment: examine user equipment 416 , make it work in multi-transmission point cooperation mode, its serving transmission point is transmission point 202 , and its non-serving transmission points are transmission points 200 and 204 . User equipment 416 may be a single antenna or a multi-antenna device.

[0103] Step S610: Determine a cooperative transmission point set participating in multi-antenna multi-transmission point cooperation.

[0104] In this step, the user equipment generally first needs to obtain a set of transmission points participating in multi-antenna multi-transmission point cooperation from the service transmission point. As a non-limiting implementation of this step, the user equipment (eg, user equipment 416) may periodically report path loss information from the user equipment to adjacent transmission points to the serving transmission point (eg, serving transmission point 202). Furthermore, the serving transmission point can est...

example 1

[0105] Example 1(a): The transmission point set configured by the service transmission point 202 for the user equipment 416 includes 2 transmission points (to facilitate the user equipment to use 1 bit to feed back the result of selecting 1 from 2), the 2 transmission points may be: (1) Port 0 to port 7 of the launch point 202, a launch point consisting of 8 ports in total; (2) port 0 to port 3 of the launch point 202, port 0 to port 1 of the launch point 200, and port 2 to port 1 of the launch point 204 Port 3, a launch point composed of 8 ports in total.

[0106] Example 1(b): The transmission point set configured by the service transmission point 202 for the user equipment 416 includes 3 transmission points (to facilitate the user to use 2 bits to feed back the result of choosing 1 from 3), and the 3 transmission points can be: (1) transmit Port 0 to port 7 of point 202, a total of 8 ports constitute the emission point; (2) port 0 to port 3 of emission point 202, port 0 to ...

example 2

[0114] Example 2: Assume that the cooperative TP set of the user equipment 416 only includes 2 TPs, for example, the serving TP 202 and the non-serving TP 200 . For the feedback of the service transmission point 202, the feedback design of the existing system is used without modification.

[0115] In addition, the feedback mode of the user equipment 416 to the non-serving transmission point can be configured as the new mode 2-1 by the serving transmission point 202 using MAC or RRC signaling. For the non-serving transmission point 200, the following design (taking the transmission point 200 as an example) is used for feedback. However, the MAC or RRC signaling is not necessary, and the user equipment 416 can also autonomously select a feedback mode to the transmission point 200, and adopt the following design for feedback.

[0116] A new type 6 is defined, which contains indication information to dynamically indicate whether the channel state information feedback is used for ...

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Abstract

The invention discloses a channel state information feedback method and user equipment. The method includes the following steps of determining a cooperation emitting point set which participates in multi-emitting-point cooperation, wherein the cooperation emitting point set comprises service emitting points and non-service emitting points, and executing feedback of channel state information according to each emitting point in the cooperation emitting point set, wherein a channel state information feedback mode for the non-service emitting points dynamically supports feedback of combined emitting JT cooperation type and feedback of which the DPS cooperation type is selected according to the dynamic emitting points. The channel state information feedback method and the user equipment have the advantages of being easy to implement, low in cost and capable of being applied to a LTE-A system and a 4G system.

Description

technical field [0001] The present invention relates to the field of communication technology, and more specifically, to a channel state information feedback method in a multi-transmission point cooperation mode and user equipment applying the method. Background technique [0002] Multi-antenna (MIMO: Multiple In Multiple Out) wireless transmission technology configures multiple antennas at the transmitting end and the receiving end, utilizes space resources in wireless transmission, and obtains space multiplexing gain and space diversity gain. Research on information theory shows that the capacity of a MIMO system increases linearly with the minimum number of transmitting antennas and receiving antennas. A schematic diagram of a MIMO system is shown in figure 1 as shown, figure 1 In , multiple antennas at the transmitter and receiver constitute a multi-antenna wireless channel, including airspace information. In addition, OFDM (orthogonal frequency division multiplexing)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
Inventor 丁铭
Owner SHARP KK