Radio-resource management system and method thereof, and management apparatus, base station and terminal to be employed for it

Abstract

Terminals and base stations belonging to service areas 100 to 102 of plural radio operators periodically measure a radio-link quality and an availability ratio of a radio link to notify them to a radio-resource management server 40 . The server 40 alters a frequency of the base station, and a transmitted-power quantity of the base station and the terminal based on these measured results to improve the radio-link quality, and reduces interference with a neighboring radio system. When a load is concentrated on a network of a specific radio operator, an instruction of handover is given to the terminal from the server 40 to realize a load distribution within the radio operator, and between the radio operators. When the server 40 detects excessive radio interference between the radio operators, it notifies occurrence of a fault, an interference quantity, a quantity of the transmitted power that the base station should attenuate, and the frequency that the base station should alter to the above radio operator that becomes an interference source.

What is claimed: 
     
         1 . A radio base station in a wireless network system including a radio-resource management apparatus for managing a radio resource, and radio base stations belonging to a plurality of respective different radio operators, said radio base station comprising:
 means for measuring a quality of a radio link and notifying radio-link quality information that is this measured result to said radio-resource management apparatus; and   means for, in reply to alteration-control notification of a frequency based on said measured result from said radio-resource management apparatus, taking alteration control of a service frequency on the basis of information relating to other base stations belonging to different operators that the frequency used be said radio base station.   
     
     
         2 . The radio base station according to  claim 1 , wherein said means for notifying comprises means for notification makes notification at a predetermined notification period. 
     
     
         3 . The radio base station according to  claim 2 , wherein, in the event that the radio-link quality exceeded a predetermined threshold, said notification period is set to be longer than it is set in the event that it is equal to or less than said threshold. 
     
     
         4 . The radio base station according to  claim 2 , wherein, in the event that a distribution value of the radio-link quality measured within a constant period exceeded a predetermined threshold, said notification period is set to be longer than it is set in the event that it is equal to or less than the threshold.