Wireless relay station device, wireless base station device, and relay frequency allocation method

A wireless relay and wireless base station technology, applied in the field of wireless relay station devices, can solve problems such as interference, mixing, and inability to ensure isolation, and achieve the effect of increasing throughput

Inactive Publication Date: 2012-12-19
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition, the backhaul link (Un) between the wireless base station device and the wireless relay station device and the access link (Uu) between the wireless relay station device and the mobile terminal device can be considered to be operated at different frequencies or the same frequency. In the latter case In this case, when simultaneous transmission and reception processing is performed by the wireless relay station device, unless sufficient isolation is ensured in the transmission and reception lines, the transmitted signal will be mixed into the receiver of the wireless relay station device and cause interference.

Method used

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  • Wireless relay station device, wireless base station device, and relay frequency allocation method
  • Wireless relay station device, wireless base station device, and relay frequency allocation method
  • Wireless relay station device, wireless base station device, and relay frequency allocation method

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Embodiment Construction

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0026] In the LTE-A system, in order to maintain backward compatibility with the LTE system, such as image 3 The frequencies shown utilize frequency bands. image 3 It is a diagram for explaining the state of frequency usage when mobile communication is performed in the downlink. image 3 The example shown is the LTE-A system which is the first mobile communication system having a relatively wide first system frequency band composed of a plurality of component carriers (CCs), and the LTE-A system having a relatively narrow (here composed of one component carrier) second system. The frequency usage status when the LTE system, which is the second mobile communication system in the system frequency band, coexists. In the LTE-A system, for example, wireless communication is performed with a variable system bandwidth of 100 MHz or less, and in the LTE system, wi...

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Abstract

In order to increase throughput in an access link and to optimally control wireless link capacity in a backhaul link in a wireless communication system using relay transmission technology, the disclosed relay frequency allocation method has: a step for determining whether or not to apply carrier aggregation in a backhaul link from a wireless base station device to a mobile terminal device under the aforementioned wireless base station device, and / or an access link from a wireless relay station device to a mobile terminal device under the aforementioned wireless relay station device; a step for allocating a frequency band that transmits a downlink signal in the aforementioned backhaul link and / or the aforementioned access link when applying carrier aggregation; and a step for transmitting the downlink signal in the aforementioned backhaul link and / or the aforementioned access link using the allocated frequency band.

Description

technical field [0001] The present invention relates to a wireless relay station device, a wireless base station device and a relay frequency allocation method using relay transmission technology in an LTE-A (Long Term Evolution-Advanced) system. Background technique [0002] In 3GPP (3 rd Generation Partnership Project (Third Generation Partnership Project), as a fourth-generation mobile communication system that realizes higher-speed and larger-capacity communication than LTE (Long Term Evolution, Long Term Evolution), the development standard of the third-generation mobile communication system, is Standardize LTE-Advanced (LTE-A). In addition to achieving high-speed and large-capacity communications, LTE-A also takes improving the throughput of cell-edge users as an important issue. As one of its means, it is studying the relay of wireless transmission between wireless base station devices and mobile terminal devices. relay technology. By using relays, it is expected t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/26H04B7/208H04W72/04
CPCH04L5/001H04B7/15542H04L5/00H04W84/047H04W72/0453
Inventor 永田聪阿部哲士三木信彦高桥秀明岩村幹生
Owner NTT DOCOMO INC
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