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Base station device, mobile station device and transmission power control method

A technology of base station equipment and transmission power, which is applied in power management, transmission control/balance, communication between multiple stations, etc., and can solve problems such as system capacity reduction

Inactive Publication Date: 2004-04-28
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the system capacity will be greatly reduced

Method used

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  • Base station device, mobile station device and transmission power control method
  • Base station device, mobile station device and transmission power control method
  • Base station device, mobile station device and transmission power control method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] figure 1 is a conceptual diagram of a wireless communication system in which a base station device according to Embodiment 1 of the present invention and a mobile station device according to Embodiment 1 of the present invention perform communication. exist figure 1 , the base station apparatus 101 is communicating with the mobile station apparatus A 102 and the mobile station apparatus B 103.

[0025] The spreading code A is assigned to the mobile station apparatus A 102, and the spreading code B is assigned to the mobile station apparatus B 103. That is, the data transmitted and received between the base station apparatus 101 and the mobile station apparatus A 102 is spread using the spreading code A, while the data transmitted and received between the base station apparatus 101 and the mobile station apparatus B 103 is spread using the spreading code B spread spectrum.

[0026] The structure of base station apparatus 101 will now be explained. figure 2 is a main...

Embodiment 2

[0068] The base station apparatus according to Embodiment 2 of the present invention has almost the same structure as the base station apparatus according to Embodiment 1, but is different in that an interfering station that exerts interference on a plurality of mobile station apparatuses is identified by comparing information on a plurality of interfering stations A mobile station device that has a significant influence on the reduction of system capacity is identified, and the transmission power to this identified mobile station device is reduced.

[0069] Figure 7 is a schematic diagram of a wireless communication system in which a base station device performs communication with a mobile station device according to Embodiment 2 of the present invention. exist Figure 7 , a base station device 401 is communicating with a mobile station device A 402 , a mobile station device B 403 , and a mobile station device C 404 .

[0070] Spreading code A is assigned to mobile station...

Embodiment 3

[0082] The base station apparatus according to Embodiment 3 of the present invention has almost the same structure as that of the base station apparatus according to Embodiment 1 or Embodiment 2, except that, when reconfirming for each mobile station apparatus whether to accept The transmitted interfering station information is used to determine the mobile station device whose transmission power should be reduced and then identify the mobile station device whose transmission power should be reduced.

[0083] Figure 10 is a main block diagram showing the structure of a base station device according to Embodiment 3 of the present invention. Figure 10 The same components as those in Embodiment 2 use the same codes as in Embodiment 2, and their detailed descriptions are omitted.

[0084] exist Figure 10 Among them, the spreading code notification section 601, in addition to performing the operations described in Embodiment 1 and Embodiment 2, also notifies each mobile station...

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Abstract

A diffusion code reporting unit reports diffusion codes corresponding to communicating mobile station devices to respective mobile station devices, a separation unit separates, from a received signal, information indicating an interference station detected from reverse-diffusion results in respective mobile station devices, and a control unit reduces the transmission power of a signal to the interference station.

Description

technical field [0001] The present invention relates to a base station device, a mobile station device, and a transmission power control method. Background technique [0002] In a mobile communication system using the CDMA method, transmission power control is performed in order to solve a so-called near-far problem. Broadly speaking, there are two types of transmit power control: open loop and closed loop. When applying closed-loop transmission power control to the downlink (channel from the base station to the mobile station), the mobile station and the base station operate as follows. [0003] The mobile station measures an SIR (Signal to Interference Ratio) representing the quality of a received signal, and compares the measured SIR with a target SIR. If the measured SIR is greater than the target SIR, the mobile station sends an instruction to the base station to decrease the transmission power, and if the measured SIR is less than or equal to the target SIR, the mobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/04H04B1/04H04B7/005H04B7/26H04J13/00H04W52/08H04W72/04
CPCH04W52/146H04W52/243H04B1/7103H04W52/267H04B2201/709709Y02B60/50H04B1/707
Inventor 上丰树
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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