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Wireless communication base station system, method, program and recording medium

A wireless communication and base station system technology, applied in the field of wireless communication base station systems, can solve problems such as complex management, difficulty, and limited system capacity

Inactive Publication Date: 2003-10-08
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, as described above, there is a problem that when the existing system frequency band is divided into multiple frequency bands, separate filters are required for the high frequency bands in each of the divided frequency bands due to the limitation of the bandwidth. However, it is difficult to miniaturize, lighten and reduce the price of the circuit, and the management becomes complicated
Furthermore, in the case where the base stations are installed separately for the macrocell base station and the microcell base station, it becomes a big problem for the microcell base station where the installation place of the base station is limited to an appropriate selection.
There is also a problem that the frequency band used in the macro-sector system cannot be used due to the appropriate increase in the utilization efficiency of the communication channel and the micro-cell base stations not only suitable for areas with little communication traffic but also areas with concentrated communication traffic. communication with micro-sector base stations, thus limiting the capacity of the system

Method used

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  • Wireless communication base station system, method, program and recording medium
  • Wireless communication base station system, method, program and recording medium
  • Wireless communication base station system, method, program and recording medium

Examples

Experimental program
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Embodiment approach 1

[0083] (1) Explanation of the basic configuration of this embodiment

[0084] The operation of the present embodiment using the CDMA method is shown. First, the conceptual diagram in this embodiment is shown in figure 1 , The specific diagram is shown in figure 2 . The macro sector 100 refers to an area where the macro wireless / optical transceiver 400 and the mobile station 300 shown in the figure can perform wireless communication. Here, the macro wireless / optical transceiver 400 is an example of a macro wireless communication device. The micro sector area 200 refers to an area where the micro wireless / optical transceiver 500 and the mobile station 300 shown in the figure can perform wireless communication. Here, the micro wireless / optical transceiver 500 is an example of a micro wireless communication machine. Macro wireless / optical transceiver 400 and micro wireless / optical transceiver 500, such as figure 1 and figure 2 , Is a communication device including an antenna, whic...

Embodiment approach 2

[0135] In the wireless communication base station system related to Embodiment 2, the antenna of the macro wireless / optical transceiver 400 is used as an adaptive array antenna, and the antenna of the micro wireless / optical transceiver 500 is used as an omnidirectional antenna or sector antenna. Due to this configuration, the directivity of the antenna in the micro wireless / optical transceiver 500 is a fixed beam, while the directivity of the antenna in the macro wireless / optical transceiver 400 can follow the movement of the user. Here, the so-called omnidirectional antenna refers to an antenna whose antenna beam has the same power at 360 degrees, and the so-called sector antenna refers to a form in which the service area is divided into several sectors, and an antenna is installed in each sector. Furthermore, the adaptive array antenna has the effect of reducing the interference power between users because the directivity of the antenna is directed toward the desired user and th...

Embodiment approach 3

[0138] Below, based on Picture 10 The third embodiment of the present invention will be described. Among them, the symbols in the figure have and figure 2 Parts with the same function use the same symbols. in Picture 10 In the base station system, a micro wireless / optical transceiver 500 including an antenna for wireless communication with a plurality of micro sectors 200 is provided. The micro-wireless / optical transceiver 500 for wireless communication with each micro-sector 200 is intended to cover the no-signal zone and the micro-sector 200 where the traffic is concentrated, or to increase the utilization efficiency of the communication channel through the micro-sectorization The system capacity is set for the purpose. In this embodiment, the micro wireless / optical transceiver 500 micro-sectors the communicable area, and the micro wireless / optical transceiver 500 is dispersedly arranged. The macro fan-shaped area 100 is composed of a plurality of micro-fan-shaped areas 200 g...

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PUM

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Abstract

By using the optical fiber network 600, the macro wireless / optical transceiver 400 for wireless communication with the mobile station 300 within the macro sector 100 and the micro wireless / optical transceiver 500 for wireless communication with the mobile station within the micro sector 200 The configuration of the wireless communication base station system connected to the general-purpose base station 700 reduces the area of ​​the macro sector and the micro sector generated when the CDMA method using the same frequency is applied to the cell configuration in which the macro sector 100 and the micro sector 200 coexist The interference between them increases the capacity of the base station.

Description

Technical field [0001] The present invention relates to a wireless communication base station system for mobile communication based on a code division multiple access method (CDMA: Code Division Multiple Access, hereinafter referred to as a CDMA method) using a spread spectrum modulation method. Background technique [0002] The existing wireless communication system for mobile communication in which the macro cell and the micro cell coexist is described in the Special Publication No. 9- of the Mai·Ail·Michi Mobile Communication Basic Technology Research Institute published on September 19, 1997. 247079. Below, use Figure 12 to Figure 16 get on [0003] Description of prior art. [0004] Picture 12 A diagram showing that there are micro cells in a macro cell, and mobile stations A, B, and C connected to the macro cell. Here, the mobile station means a mobile phone or the like that performs mobile communication. Each of the mobile stations A, B, and C controls the transmission ...

Claims

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Application Information

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IPC IPC(8): H04W16/32H04W88/08
CPCH04W16/32H04W88/085
Inventor 友江直仁柏木孝
Owner MITSUBISHI ELECTRIC CORP