Wireless communication apparatus and antenna directivity/radio resource assigning method

In a wireless communication apparatus tracking mobile stations that are moving at high speed and for suppressing interference when transmitting signals to and receiving signals from N mobile stations, N being a natural number greater than 2 or equal to 2, a method of assigning different antenna directivities and different radio resources to the mobile stations based on the moving speed of the mobile stations, the method comprising the steps of:

• a) estimating a moving speed of each mobile station based on M reception signals each received by the corresponding antenna, M being a natural number greater than 2 or equal to 2;
• b) determining an antenna directivity for each mobile station based on M reception signals and the estimated moving speeds;
• c) separating said M reception signals into signal components that have been transmitted from respective mobile stations, based on the determined directivities;
• and
• d) recovering transmission signals from respective mobile stations based on the separated respective signal components;
• e) determining radio resource assignments;
• said determining assigns at least one of frequencies and time slots to said respective mobile stations based on a service quality signal indicative of the service quality of the mobile stations and the estimated moving speeds to suppress interference between mobile stations;
• f) generating N transmission signals based on N transmission information, the determined directivities, and the determined resource assignments;
• and
• g) multiplexing said N transmission signals generated, using the determined resource assignments and outputting the multiplexed transmission signal,
• wherein said directivity determining step determines directivity with a wide beam width for mobile stations that are moving at a high speed, estimated by said directivity deciding step, and determines directivity with a narrow beam width for mobile stations that are moving at a low speed, estimated by said directivity deciding step, wherein the directivity with the narrow beam width is determined in order to increase a tracking capability,
• wherein said step e) includes classifying said moving speeds into L moving speed classes, L being an arbitrary natural number, and assigning different radio resources to said moving speed classes based on an assignment policy that is used in other wireless communication apparatuses to assign radio resources.

In a wireless communication apparatus tracking mobile stations moving at high speed and for suppressing interference when transmitting signals to and receiving signals from N mobile stations, N being a natural number greater than 2 or equal to 2, a non-transitory computer readable storage medium storing a computer program for enabling a computer to perform the function of assigning different antenna directivities and different radio resources to the mobile stations based on the moving speed of the mobile stations, the computer program comprising:

• a first instruction code for estimating a moving speed of each mobile station based on M reception signals each received by the corresponding antenna, M being a natural number greater than 2 or equal to 2;
• a second instruction code for determining an antenna directivity for each mobile station based on said M reception signals and the estimated moving speeds;
• a third instruction code for separating said M reception signals into signal components that have been transmitted from respective mobile stations, based on the determined directivities;
• a fourth instruction code for recovering transmission signals to respective mobile stations based on the separated respective signal components;
• a fifth instruction code for determining radio resource assignments;
• said fifth instruction code assigns at least one of frequencies and time slots to said respective mobile stations based on a service quality signal indicative of the service quality of the mobile stations and the estimated moving speeds to suppress interference between mobile stations;
• a sixth instruction code for generating N transmission signals based on N transmission information, the determined directivities, and the determined resource assignments;
• and
• a seventh instruction code for multiplexing said N transmission signals generated, using the determined resource assignments and for output-ting the multiplexed transmission signal,
• wherein said directivity determining instruction code determines directivity with a wide beam width for mobile stations that are moving at a high speed, estimated by said directivity deciding instruction code, and determines directivity with a narrow beam width for mobile stations that are moving at a low speed, estimated by said directivity deciding instruction code, where the directivity with the narrow beam width is determined in order to achieve a high tracking capability,
• wherein said fifth instruction code classifies based on an assignment policy that is used in other wireless communication apparatuses to assign radio resources.