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Method For Controlling Wireless Communication, Wireless Communication System, Reception Device, And Transmission Device

A technology of wireless communication system and wireless communication control, which is applied in the field of wireless communication control, wireless communication system, receiving device and sending device, and can solve the problem that the wireless base station cannot measure the channel state by itself

Inactive Publication Date: 2018-02-09
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the downlink wireless communication, the wireless base station becomes the transmitting device, so the wireless base station cannot measure the downlink channel state by itself

Method used

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  • Method For Controlling Wireless Communication, Wireless Communication System, Reception Device, And Transmission Device
  • Method For Controlling Wireless Communication, Wireless Communication System, Reception Device, And Transmission Device
  • Method For Controlling Wireless Communication, Wireless Communication System, Reception Device, And Transmission Device

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no. 1 approach

[0080] Next, a first embodiment will be described based on FIG. 1 . As shown in FIG. 1 , the first embodiment is a control method in a wireless communication system including a transmitting device having a plurality of transmitting antennas and a receiving device having at least one receiving antenna, and the receiving device functions as the at least one receiving antenna One of the specific receiving antennas receives a reference signal transmitted from each of the plurality of transmitting antennas, and the receiving device determines based on the reference signal that only the specific receiving signal is used to receive the plurality of transmitting antennas Each of the transmission antenna weights and reception antenna weights based on the same transmission data transmission signal, the receiving device transmits to the transmission device the first information related to the transmission antenna weight and the first information related to the reception antenna weight th...

no. 2 approach

[0123] Below, based onimage 3 A second embodiment will be described. The second embodiment corresponds to a case where the present invention is specifically applied to an LTE-based wireless communication system. However, the present invention is not limited to LTE, and can also be applied to wireless communication systems based on other wireless communication protocols.

[0124] The second embodiment can be applied to either of FDD and TDD in LTE, but is preferably applied to FDD.

[0125] image 3 is a diagram showing the processing procedure in the wireless communication system according to the second embodiment. It should be noted, image 3 Although the processing procedure when the wireless base station 10 has four transmitting antennas and the wireless terminal 20 has two receiving antennas is shown, these numerical values ​​are merely examples.

[0126] exist image 3 In S101, the wireless terminal 20 transmits antenna configuration information to the wireless base sta...

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Abstract

The purpose of the disclosed technology is to provide a method for controlling wireless communication, a wireless communication system, a reception device, and a transmission device with which it is possible for a wireless base station to fully ascertain downlink channel characteristics when performing multipath communication in which a plurality of transmission antennas are used. In order to solve the problem and achieve the purpose mentioned above, the disclosed method for controlling wireless communication is a control method in a wireless communication system provided with a transmission device equipped with a plurality of transmission antennas and a reception device equipped with at least one reception antenna, wherein: the reception device receives, via a specific reception antenna that is one of the at least one reception antenna, a reference signal transmitted from each of the plurality of transmission antennas; the reception device determines, on the basis of the reference signal, a transmission antenna weight and a receiving antenna weight that are applied when only the specific reception antenna receives a signal transmitted by each of the plurality of transmission antennas on the basis of the same transmission data; and the reception device transmits first information pertaining to the transmission antenna weight and second information pertaining to the reception antenna weight to the transmission device.

Description

technical field [0001] The present invention relates to a wireless communication control method, a wireless communication system, a receiving device and a sending device. Background technique [0002] In recent years, in wireless communication systems such as mobile phone systems (cellular systems), research into next-generation wireless communication technologies has been conducted in order to achieve further speed-up and capacity-enhancing of wireless communication. For example, 3GPP (3rd Generation Partnership Project: 3rd Generation Partnership Project Group), which is a standardization organization, has proposed a communication standard called LTE (Long Term Evolution: Long Term Evolution) and a wireless communication technology based on LTE. It is a communication standard of LTE-A (LTE-Advanced: Advanced Long Term Evolution). Hereinafter, unless otherwise specified, it is assumed that "LTE" includes not only LTE and LTE-A but also other wireless communication systems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J99/00
CPCH04L25/0204H04L25/0224H04B7/0417H04B7/0619H04W72/21H04B7/0617H04B7/0634
Inventor 实川大介伊达木隆关宏之
Owner FUJITSU LTD
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