Ntt Mobile Communications Network, Inc.

Ntt Docomo, Inc.

Masaaki Yoshimi

Tatsuaki Wakabayashi

Kiyohito Nagata

Kazuhiko Kakinuma

Teruya Fujii

Katsunori Hamada

Takashi Ono

Hisashi Matsuoka

Kazumasa Nitta

A method of controlling an operation of a mobile base station that is linked to a mobile communication system via a wireless relay channel includes an information acquiring step of acquiring estimation-purpose base information for estimating a condition of radio interference between the mobile base station and one or more other base stations, the acquisition of the estimation-purpose base information being made by the mobile base station and involving measurement of a physical property responsive to a current position of the mobile base station, an estimation step of estimating the condition of radio interference based on the acquired estimation-purpose base information, and a control step of controlling an operation of the mobile base station based on the estimated condition of radio interference.

Controlling operation of mobile base station so as to avoid radio interference

A mobile communication scheme capable of notifying a communication regulation information efficiently by using radio interfaces from the macro-cell system to the micro-cell system, without requiring communications through a fixed communication network, so as to be able to regulate the service through the micro-cell system efficiently in coordination with the regulation of the service through the macro-cell system. In this mobile communication scheme, the communication regulation information is notified from the macro-cell system to the mobile station while the mobile station is located within the macro-cell system, and stored in a memory of the mobile station. Then, the communication regulation information is notified from the mobile station to the micro-cell system while the mobile station is located within the micro-cell system after moving from the macro-cell system to the micro-cell system, so that the communication regulation is applied to the mobile station at the micro-cell system according to the received communication regulation information.

Mobile communication scheme for efficiently regulating service through

A mobile communication system is provided in which a base station commands a mobile station (or field monitor) to measure the field strength for a specific channel. The mobile station reports the measured results to the base station. The measured results are used in conjunction with base station identification codes to obtain a single representative value which is used to determine what channels can be selected and used by the system. This enables an existing cellular system to be utilized as a first mobile communication system, and makes it possible to construct a second mobile communication system in the same area as the service area of the first system.

Channel allocation for co-located systems based on interferring channel

Mobile communication system using base station frequency correction

Each base station measures the field intensity of downlink rediowaves from other base stations, then analyzes the received rediowaves above a predetermined field intensity value and decides whether they are rediowaves used in the same mobile radio communication system. The base station creates peripheral base station information based on information about the rediowaves decided as being used in the same mobile radio communication system.

Method for automatic creation of peripheral zone information

A mobile station measures the field intensity and bit error rate of a downlink radio wave from a base station at each measurement timing and reports the measured results to the base station. Upon receiving the measured results from each mobile station, the base station compares the measured results with a reference characteristic to determine if they are abnormal or not. The base station acquires the determined results of the measured results for a fixed period of time and statistically processes them to judge the state of interference.

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Fujisawa, Japan

Masaaki Yoshimi