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Method for wireless communication, user equipment, and base station

A technology for user equipment and wireless communication, applied in wireless communication, radio transmission system, multiplexing code allocation and other directions, which can solve problems such as incorrect beam selection, affecting signal reception quality, etc.

Inactive Publication Date: 2019-03-15
DOCOMO INNOVATIONS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, when REs used for CSI-RS are precoded with different precoders between the signal from the serving (desired) cell and from the interfering cell, the UE may incorrectly perform beam selection because the precoder affects the reception The reception quality of the signal

Method used

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  • Method for wireless communication, user equipment, and base station
  • Method for wireless communication, user equipment, and base station
  • Method for wireless communication, user equipment, and base station

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Embodiment Construction

[0038] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the examples of the present invention, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known features have not been described in detail in order not to obscure the invention.

[0039] Figure 2AA wireless communication system 1 according to one or more embodiments of the invention is shown. The wireless communication system 1 includes a user equipment (UE) 10 , base stations (BS) 20 ( 20A and 20B ), and a core network 30 . The wireless communication system 1 may be a New Radio (NR) system, an LTE / LTE-Advanced (LTE-A) system, or other systems. The wireless communication system 1 is not limited to the specific settings described h...

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Abstract

A method for wireless communication includes receiving, with a user equipment (UE), first information indicating predetermined resources of first resources used for transmission of first signals and second information indicating alignment of interference levels caused by transmission in the predetermined resources, from a first base station (BS), and receiving, with the UE, the first signals usingthe first information and the second information from the first BS, and second signals transmitted using second resources. The predetermined resources cause interference with the second resources atthe UE. Transmission power of signals in the predetermined resources may be identical. Signals sent using the predetermined resources may be precoded with an identical precoder.

Description

technical field [0001] The present invention relates generally to wireless communications, and more particularly, to interference alignment schemes for beam selection in wireless communications systems. Background technique [0002] In Long Term Evolution (LTE) Release 13 (Rel. 13 LTE), standardized by the 3rd Generation Partnership Project (3GPP), a channel state information (CSI) feedback scheme based on beam selection was introduced. According to the CSI feedback scheme in Rel.13 LTE, a base station (BS) transmits multiple beamforming (BF) CSI reference signals (CSI-RS) precoded with different precoders. Then, the user equipment (UE) transmits feedback information including an index of a desired beam (CSI-RS) among the plurality of BF CSI-RSs as a CSI-RS resource indicator (CRI). CRI is also known as beam index (BI). In the above beam selection in Rel.13 LTE, it is assumed that the UE performs channel estimation using the received CSI-RS. Therefore, the UE can effectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L5/00H04W72/54
CPCH04B7/0619H04L5/0051H04L5/0094H04L5/0073H04W72/541H04J13/16H04L5/0048H04W88/02H04W88/08
Inventor 柿岛佑一永田聪那崇宁
Owner DOCOMO INNOVATIONS