Apparatus and method in wireless communication system

Abstract

A spectrum management system includes circuitry that obtains interference information from another spectrum management system, where the interference information indicates interference with communication of a communication system managed by the other spectrum management system. The interference is caused by at least one secondary communication system managed by the spectrum management system. The circuitry also modifies a communication characteristic of the at least one secondary communication system based on the interference information.

What is claimed is: 
     
         1 . A spectrum management system, comprising:
 circuitry configured to   obtain interference information from another spectrum management system indicating interference with communication of a communication system managed by the other spectrum management system, the interference being caused by at least one secondary communication system managed by the spectrum management system, and   modify a communication characteristic of the at least one secondary communication system based on the interference information.   
     
     
         2 . The spectrum management system according to  claim 1 , wherein the communication system managed by the other spectrum management system is a primary communication system and the interference information includes information for the primary communication system managed by the other spectrum management system. 
     
     
         3 . The spectrum management system according to  claim 1 , wherein the interference information indicates aggregate interference with the communication of the communication system managed by the other spectrum management system, and
 the circuitry modifies the communication characteristic of the at least one secondary communication system to avoid the aggregate interference, the aggregate interference being an aggregate of interference from the at least one secondary communication system and at least one secondary communication system not managed by the spectrum management system.   
     
     
         4 . The spectrum management system according to  claim 3 , wherein the interference information includes information for the at least one secondary communication system not managed by the spectrum management system, and the circuitry modifies the communication characteristics based on the information. 
     
     
         5 . The spectrum management system according to  claim 1 , wherein the interference information includes identifier information of the at least one secondary communication system, and the circuitry identifies the at least one secondary communication system using the identifier information. 
     
     
         6 . The spectrum management system according to  claim 1 , wherein the interference information includes communication characteristic information for the communication characteristic of the at least one secondary communication system, and the circuitry sets the communication characteristic of the at least one secondary communication system using the communication characteristic information. 
     
     
         7 . The spectrum management system according to  claim 1 , wherein the circuitry calculates communication characteristic information based on the interference information, and sets the communication characteristic of the at least one secondary communication system using the communication characteristic information. 
     
     
         8 . The spectrum management system according to  claim 1 , wherein the circuitry is further configured to transmit spectrum use information corresponding to the at least one secondary communication system to the other spectrum management system. 
     
     
         9 . A spectrum management system comprising:
 circuitry configured to   identify interference with communication of a communication system managed by the spectrum management system, the interference originating from at least one secondary communication system managed by another spectrum management system,   generate interference information based on the identified interference, and   provide the interference information to the other spectrum management system.   
     
     
         10 . The spectrum management system according to  claim 9 , wherein the communication system managed by the spectrum management system is a primary communication system and the interference information includes information for the primary communication system managed by the other spectrum management system. 
     
     
         11 . The spectrum management system according to  claim 9 , wherein the circuitry identifies the interference based on spectrum use information corresponding to the at least one secondary communication system managed by the other spectrum management system. 
     
     
         12 . The spectrum management system according to  claim 11 , wherein the spectrum use information is received from the other spectrum management system. 
     
     
         13 . The spectrum management system according to  claim 11 , wherein the circuitry is further configured to calculate communication characteristic information for the at least one secondary communication system managed by the other spectrum management system, and to transmit the communication characteristic information to the other spectrum management system as part of the interference information, the communication characteristic information including information to modify a communication characteristic of the at least one secondary communication system managed by the other spectrum management system to avoid interference identified. 
     
     
         14 . The spectrum management system according to  claim 9 , wherein the circuitry is further configured to determine aggregate interference using the interference identified and spectrum use information of at least one secondary communication system managed by any spectrum management system, and to generate the interference information based on the aggregate interference. 
     
     
         15 . The spectrum management system according to  claim 14 , wherein the circuitry is further configured to transmit information of the at least one secondary communication system managed by any spectrum management system to the other spectrum management system as part of the interference information. 
     
     
         16 . The spectrum management system according to  claim 14 , wherein the circuitry is further configured to calculate communication characteristic information for the secondary communication system managed by the other spectrum management system based on the aggregate interference, and to transmit the communication characteristic information, as part of the interference information, to the other spectrum management system, the communication characteristic information indicating a modification to a communication characteristic of the at least one secondary communication system managed by the other spectrum management system. 
     
     
         17 . A method for spectrum management system, comprising:
 obtaining, with circuitry of the spectrum management system, interference information from another spectrum management system indicating interference with communication of a communication system managed by the other spectrum management system, the interference being caused by at least one secondary system managed by the spectrum management system, and   modifying a communication characteristic of the at least one secondary communication system based on the interference information.   
     
     
         18 . The method according to  claim 17 , wherein the communication system managed by the other spectrum management system is a primary communication system and the interference information includes information for the primary communication system managed by the other spectrum management system. 
     
     
         19 . A method for a spectrum management system, comprising:
 identifying, in circuitry of the spectrum management system, interference with communication of a communication system managed by the spectrum management system, the interference originating from a secondary communication system managed by another spectrum management system,   generating interference information based on the identified interference, and   providing the interference information to the other spectrum management system.   
     
     
         20 . The method for a spectrum management system according to  claim 19 , wherein the communication system managed by the spectrum management system is a primary communication system and the interference information includes information for the primary communication system managed by the other spectrum management system.