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Wireless communication control method, wireless communication system, receiving device, and transmitting 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: 2019-04-23
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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  • Wireless communication control method, wireless communication system, receiving device, and transmitting device
  • Wireless communication control method, wireless communication system, receiving device, and transmitting device
  • Wireless communication control method, wireless communication system, receiving device, and transmitting device

Examples

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no. 1 approach

[0080] Below, based on Figure 1A , Figure 1B The first embodiment will be described. like Figure 1A , Figure 1B As shown, 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 one of the at least one receiving antenna The specific receiving antenna 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 each of the plurality of transmitting antennas Based on the transmission antenna weight and the reception antenna weight in the case of the same transmission data transmission signal, the reception device transmits to the transmission device first information related to the transmission antenna weight and second informa...

no. 2 approach

[0123] Below, based on image 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 ba...

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Abstract

An object of the disclosed technology is to provide a wireless communication control method, a wireless communication system, a receiving device, and a transmitting device, so that a wireless base station can sufficiently grasp downlink channel characteristics when performing multipath communication using a plurality of transmitting antennas. In order to solve the above technical problems and achieve the purpose, the disclosed wireless communication control method is a control method in a wireless communication system equipped with a transmitting device having multiple transmitting antennas and a receiving device having at least one receiving antenna, wherein the receiving device By receiving a reference signal transmitted from each of the plurality of transmitting antennas by a specific receiving antenna as one of the at least one receiving antenna, the receiving means determines, based on the reference signal, to apply to only the specific receiving signal receiving a transmission antenna weight and a reception antenna weight of a signal transmitted by each of the plurality of transmission antennas based on the same transmission data, and the reception means transmits to the transmission means first information related to the transmission antenna weight and second information related to the receive antenna weights.

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 Patents(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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