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Mobile communication system and base station and mobile terminal

A technology of mobile communication system and base station, which is applied in the field of mobile communication system and can solve problems such as complex and difficult device structures

Inactive Publication Date: 2008-04-16
NTT DOCOMO INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the allocation of radio frequency bands is already in an overcrowded state, and it is difficult to secure a continuous wide radio frequency band
Furthermore, in the TDD type W-CDMA system, as the traffic increases, it is required to be able to process the clock frequency of the baseband signal and the modulation when the baseband signal is modulated into the radio signal at high speed, which will complicate the device structure.

Method used

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  • Mobile communication system and base station and mobile terminal
  • Mobile communication system and base station and mobile terminal
  • Mobile communication system and base station and mobile terminal

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Embodiment Construction

[0076] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0077] Figure 8 A cell structure of a mobile communication system according to an embodiment of the present invention is illustrated.

[0078] according to Figure 8 , the mobile communication system includes radio base stations (BS1-BS3) 10 configured according to each cell (cell 1-cell 3) 100-300 1 -10 3 , Same as radio base station 10 1-10 3 Mobile stations for audio and non-telephone communications by radio (MS1-NS3)20 1 -20 3 . In this embodiment, it is assumed that the mobile station 20 1 -20 3 To the radio base station 10 1 -10 3 The radio frequency used when sending signals (hereinafter referred to as uplink radio frequency) is f 1 , and by the radio base station 10 1 -10 3 MS20 1 -20 3 The radio frequency used when sending signals (hereinafter referred to as downlink radio frequency) is f 2 , both of which are used in all cells (cell 1...

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Abstract

A mobile communication system includes a base station connected to a backbone network, and a mobile station configured to communicate with the base station using a radio frequency. The system has a first communication mode, in which a first radio frequency is used for an uplink and a second radio frequency is used for a downlink; a second communication mode, in which the first radio frequency is used for the uplink, and the second radio frequency is shared by the uplink and the downlink; a third communication mode, in which the second radio frequency is used for the downlink, and the first radio frequency is shared by the uplink and the downlink; and a mode switcher configured to switch the first through third communication modes in accordance with data transfer volumes on the uplink and the downlink.

Description

technical field [0001] The present invention relates to a mobile communication system, and more particularly to a mobile communication system capable of switching between uplink and downlink duplex communication methods according to the communication transmission capacity between a radio base station and a mobile station. Background technique [0002] The duplex communication mode adopted in the existing cellular mobile communication system can be divided into: FDD (Frequency Division Duplex) mode and TDD (Time Division Duplex) mode. [0003] First, refer to the attached figure 1 , 2 to describe the concept of the FDD method (or FDD for short). [0004] figure 1 An existing FDD cell configuration is shown. According to this figure, the radio base stations 11 configured in each cell 400-600 1 -11 3 The mobile stations 21 that are in the same cell respectively 1 -twenty one 3 communication. According to FDD mode, for mobile station 21 1 -twenty one 3 to radio base st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/20H04B7/26H04L5/14H04J1/00H04W16/02H04W16/04H04W28/06H04W72/04H04W72/06
CPCH04W16/04H04W72/06H04W72/044H04W72/563H04L5/1469H04W72/0446H04W72/0453
Inventor 高尾俊明梅田成视陈岚
Owner NTT DOCOMO INC
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