Directivity control system, control device, cooperative station device, reception station device, and method of controlling directivity

#This application is a 371 U.S. National Stage of International Application No. PCT/JP2009/052964, filed Feb. 20, 2009. This application claims the benefit of Japanese Patent Applications No. JP 2008-038878, filed Feb. 20, 2008, JP 2008-046012, filed Feb. 27, 2008, and JP 2008-046013, filed Feb. 27, 2008. The entire disclosures of the above applications are incorporated by reference herein.

#The present invention relates to a directivity control system, a control device, a cooperative station device, a reception station device, and a method of controlling directivity that is capable of suppressing interference through antenna directivity control even with a small reception station device (e.g., mobile phone) having no array antenna.

#This application claims priority to and the benefits of Japanese Patent Application No. 2008-038878 filed on Feb. 20, 2008, Japanese Patent Application No. 2008-046012 filed on Feb. 27, 2008, and Japanese Patent Application No. 2008-046013 filed on Feb. 27, 2008, the disclosures of which are incorporated herein by reference.

#FIG. 1 shows a configuration of a directivity control system according to a first embodiment of the present invention.

#FIG. 2 shows an example of a configuration of each portion in the directivity control system shown in FIG. 1.

#FIG. 3 shows a configuration of a directivity control system according to a second embodiment of the present invention.

#1011: interference station, 1012, 1012A, 1012B: transmission station, 1101, 1101A to 1101G: reception station, 1102: antenna, 1111: received signal transmitter in reception station, 1112: weight coefficient receiver in reception station, 1113: multiplier in reception station, 1114: product signal transmitter in reception station, 1115: synthesized signal receiver in reception station, 1201, 1201 to 12010: cooperative station, 1202: antenna, 1211: received signal transmitter in cooperative station, 1212: weight coefficient receiver in cooperative station, 1213: multiplier in cooperative station, 1214: product signal transmitter in cooperative station, 1301, 1301A: control device, 1301B, 1301C: control device in cooperative station, 1301D, 1301E: control device in transmission station, 1301F, 1301G: control device in reception station, 1311: received signal receiver, 1312: weight coefficient calculator, 1313: weight coefficient transmitter, 1314: product signal receiver, 1315: synthesized signal generator, 1316: synthesized signal transmitter, 1321: received signal receiver in cooperative station, 1322: weight coefficient calculator in cooperative station, 1323: weight coefficient transmitter in cooperative station, 1324: product signal receiver in cooperative station, 1325: synthesized signal generator in cooperative station, 1326: synthesized signal transmitter in cooperative station, 1331: received signal receiver in reception station, 1332: weight coefficient calculator in reception station, 1333: weight coefficient transmitter in reception station, 1334: product signal receiver in transmission station, 1335: synthesized signal generator in transmission station, 1336: synthesized signal transmitter in transmission station, 1341: received signal receiver in reception station, 1342: weight coefficient calculator in reception station, 1343: weight transmitter in reception station, 1344: product signal receiver in reception station, 1345: synthesized signal generator in reception station, 2011: interference station, 2021, 2022, 2021A, 2022A: transmission station, 2101, 2101A, 2101B, 2101C: reception station, 2102: antenna, 2110: TDMA communication controller in first reception station, 2110B: CSMA communication controller in first reception station, 2111: received signal transmitter in first reception station, 2112: weight coefficient receiver in first reception station, 2113: multiplier in first reception station, 2114: product signal transmitter in first reception station, 2115: synthesized signal receiver in first reception station, 2201, 2201A, 2201B, 2201C: reception station, 2202: antenna, 2210: TDMA communication controller in second reception station, 2210B: CSMA communication controller in second reception station, 2211: received signal transmitter in second reception station, 2212: weight coefficient receiver in second reception station, 2213: multiplier in second reception station, 2214: product signal transmitter in second reception station, 2215: synthesized signal receiver in second reception station, 2301, 2301A, 2301B, 2301C: directivity control device, 2310: TDMA communication controller, 2310B: CSMA communication controller, 2311: received signal receiver, 2312: weight coefficient calculator, 2313: weight coefficient transmitter, 2314: product signal receiver, 2315: synthesized signal generator, 2316: synthesized signal transmitter, 3011: interference station, 3021: transmission station, 3022: cooperative station selector, 3023: interference wave number receiver, 3024: cooperative-station interference wave information receiver, 3025: cooperation requesting unit, 3101, 3101A to 3101C: reception station, 3102: antenna, 3111: interference wave detector in reception station, 3112: received signal transmitter in reception station, 3113: weight coefficient receiver in reception station, 3114: multiplier in reception station, 3115: product signal transmitter in reception station, 3116: synthesized signal receiver in reception station, 3201: cooperative station, 3202: antenna, 3211: reception state notification unit in first cooperative station, 3212: request signal receiver in first cooperative station, 3213: received signal transmitter in first cooperative station, 3214: weight coefficient receiver in first cooperative station, 3215: multiplier in first cooperative station, 3216: product signal transmitter in first cooperative station, 3301: cooperative station, 3302: antenna, 3311: reception state notification unit in second cooperative station, 3312: request signal receiver in second cooperative station, 3313: received signal transmitter in second cooperative station, 3314: weight coefficient receiver in second cooperative station, 3315: multiplier in second cooperative station, 3316: product signal transmitter in second cooperative station, 3401, 3401A, 3401B, 3401C: control device, 3411: received signal receiver, 3412: weight coefficient calculator, 3413: weight coefficient transmitter, 3414: product signal receiver, 3415: synthesized signal generator, 3416: synthesized signal transmitter, 3417: cooperative station selector, 3418: interference wave number receiver, 3419: cooperative-station interference wave information receiver, 3420: cooperation requesting unit

#Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

#In this disclosure, at least one or two interference wave signals transmitted from an interference station are referred to as “interference signals,” and a desired wave signal transmitted from a transmission station device is referred to as a “desired signal.” Further, in the following description, the above-described “transmission station device” is simply referred to as a “transmission station,” the above-described “reception station device” is simply referred to as a “reception station,” and the above-described “cooperative station device” is simply referred to as a “cooperative station.”