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Wireless base station, mobile station, wireless communication system, and wireless communication method

A technology for wireless base stations and mobile stations, which is applied to wireless base stations, mobile stations, wireless communication systems and wireless communication fields, and can solve problems such as decreased user data throughput.

Inactive Publication Date: 2009-02-04
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, although the interference between adjacent sectors can be reduced by increasing the number of carriers used, there is still a tendency for the throughput of user data to decrease as the number of users increases.

Method used

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  • Wireless base station, mobile station, wireless communication system, and wireless communication method
  • Wireless base station, mobile station, wireless communication system, and wireless communication method
  • Wireless base station, mobile station, wireless communication system, and wireless communication method

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Embodiment Construction

[0047] Below, preferred implementations of the wireless communication system and wireless communication method of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the description of the drawings, the same reference numerals are assigned to the same elements, and overlapping descriptions are omitted.

[0048] 1 and 2 are schematic configuration diagrams of a radio base station 10 and a mobile station 30 according to a preferred embodiment of the present invention, respectively. The wireless communication system of this embodiment is a communication system that includes a plurality of wireless base stations 10 and a plurality of mobile stations 30, and uses Orthogonal Frequency Division Multiple Access (OFDMA: Orthogonal Frequency Division Multiple Access) based on IEEE802.16e. ) performs reception and transmission of radio signals between the radio base station 10 and the mobile station 30 . The so-called OFDMA is a...

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Abstract

The invention provides a wire base station, a mobile station, a wireless communication system and a wireless communication method. The wireless base station (10) includes a multiplexing unit (13) generating user data; a channel assignment control unit (14) for selecting subcarrier groups from a plurality of subcarriers on two carriers, forming two wireless frames including subchannels generated from the subcarrier groups, and for time-division multiplexing and setting the user data and control data to the two wireless frames; and a transmitting and receiving unit (16) transmitting a wireless signal including the wireless frames, wherein the channel assignment control unit (14) divides all of the subchannels in the two wireless frames into areas of destination sectors, stores the control data only in the corresponding area, and stores the user data in all of the areas in the two wireless frames.

Description

technical field [0001] The present invention relates to a wireless base station, a mobile station, a wireless communication system and a wireless communication method. Background technique [0002] Conventionally, a mobile communication system using OFDMA (Orthogonal Frequency Division Multiple Access: Orthogonal Frequency Division Multiple Access) is known. This OFDMA is used to divide a carrier signal into a plurality of orthogonal subcarriers to realize communication between a wireless base station and a mobile station. Multiplexing connections between stations. This communication method is described in detail in Non-Patent Document 1 below. As channel allocation schemes in a mobile communication system using OFDMA, two schemes shown in FIG. 22( a ) and FIG. 22( b ) can be cited. In the method shown in Fig. 22(a), subcarriers of the same frequency band are allocated to each sector S of a radio base station 1 , S 2 , S 3 , in the way shown in Figure 22(b), the frequen...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04J11/00
CPCH04J11/005H04W72/0453H04W72/23
Inventor 高桥秀明前田规行三浦俊二朝仓弘光
Owner NTT DOCOMO INC
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