Method and base station for obtaining downlink channel directional information

A technology of channel direction information and base station, applied in wireless communication, signaling feature, and link quality-based transmission modification, etc., can solve problems such as high overhead, and achieve the effect of reducing overhead

Inactive Publication Date: 2015-05-13
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these technologies, it is often necessary to feed back the spatial channel state information to the base station through the mobile station, and the overhead of this feedback may be very large

Method used

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  • Method and base station for obtaining downlink channel directional information
  • Method and base station for obtaining downlink channel directional information
  • Method and base station for obtaining downlink channel directional information

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Embodiment Construction

[0023] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0024] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the ...

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Abstract

Disclosed in the present invention is a method in the Multiple Input Multiple Output system for obtaining downlink channel directional information. The method includes steps: a base station receives downlink channel directional information which is fed back by a mobile station during the feedback period, and determines the relation between an uplink channel directional information and the received downlink channel directional information; the base station also estimates the downlink channel directional information of non-feedback sub-frame by use of the relation, those non-feedback sub-frame are not fed back during the feedback period. Furthermore, a base station and corresponding mobile station in MIMO system are also provided in the present disclosure.

Description

technical field [0001] The present invention generally relates to the field of wireless communication, and in particular relates to a method for acquiring downlink channel direction information in a multiple-input multiple-output (MIMO) system, a base station and a corresponding mobile station. Background technique [0002] Wireless communication systems transmit and receive signals in a designated electromagnetic spectrum, however, the capacity of the electromagnetic spectrum is limited. As the requirements for wireless communication systems continue to increase, more and more challenges are raised for improving spectrum utilization efficiency. In order to increase the communication capacity of the system and limit the transmission power, various wireless communication technologies, such as MIMO technology, have been proposed. In these technologies, it is often necessary to feed back the spatial channel state information to the base station through the mobile station, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04W72/04H04W88/08H04W88/02
CPCH04B7/0417H04B7/0626H04L1/0026H04L1/0027
Inventor 张翼张元涛周华田军吴建明
Owner FUJITSU LTD
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