Beam division multiple access system and method for mobile communication system

A mobile communication system, beam division multiple access technology, applied in the field of beam division multiple access system, can solve the problems that the base station cannot receive signals at the same time, and it is difficult to adaptively change the antenna beam direction, so as to solve the internal cellular interference and maximize the radiation efficiency to solve the effect of performance degradation

Inactive Publication Date: 2009-09-23
KOREA ADVANCED INST OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, there is a problem with this space division method. Due to the characteristics of the parabolic antenna, the base station cannot receive signals from multiple directions at the same time, and it is difficult to adaptively change the beam direction of the antenna.

Method used

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  • Beam division multiple access system and method for mobile communication system
  • Beam division multiple access system and method for mobile communication system
  • Beam division multiple access system and method for mobile communication system

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Embodiment Construction

[0028] A beam division multiple access system and method for a mobile communication system according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

[0029] An embodiment of the present invention proposes a method for increasing system capacity by utilizing location information of a mobile station in a mobile communication system, which is called "Beam Division Multiple Access" (Beam Division Multiple Access; hereinafter referred to as BDMA). The BDMA technology of the invention divides the antenna beam according to the position of the mobile station to realize multiple access of the mobile station, thereby greatly improving the capacity of the system.

[0030] BDMA can be embodied by pointing a beam pattern at a specific location using a phasearray antenna to generate beams through beam forming. Mobile stations sharing the same beam achieve multiple access by using common multiple access techniques such ...

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Abstract

The present invention is related to a beam division multiple access system and a method thereof. The base station according to the present invention comprises a initial mobile station information receiver for receiving initial mobile station information that a mobile station omnidirectionally transmits in an initial communication step, a mobile station location and speed detector for detecting a location and a moving speed of the mobile station from the initial mobile station information, a downlink beam generator for generating a downlink beam based on the location and the moving speed of the mobile station transferred from the mobile station location and speed detector, and adjusting at least one of a width and a direction of each the downlink beam, and a downlink beam transmitter for transmitting the downlink beam generated by the downlink beam generator to the mobile station through a phase array antenna.

Description

technical field [0001] The present invention relates to the multiple access technology of the mobile communication system, in particular to a beam division multiple access system and its method, which simultaneously adopts beam forming technology and multiple beam forming modes in a cell to allow multiple access. Background technique [0002] In a mobile communication system, it is necessary to use limited frequency and time to realize communication. For this reason, a multiple access technology is required. Examples of typical multiple access technologies developed to the present include frequency division multiple access (Frequency Division Multiple Access; hereinafter referred to as "FDMA"), time division multiple access (Time Division Multiple Access; hereinafter referred to as "TDMA"), code division multiple access Access (Code Division Multiple Access; hereinafter referred to as "CDMA"), Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Mult...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04
CPCH04B7/0697H04B7/0695H04B7/088H04W64/006H04B7/0817
Inventor 赵东浩李雄燮曺唔铉李浩员柳希政吴泳锡李勇勋
Owner KOREA ADVANCED INST OF SCI & TECH
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