COMMUNICATION DEVICE, BASE STATION, AND BASE STATION SYSTEM
First Claim
1. A communication device for communicating with N (N is an integer not smaller than 2) remote units, each remote unit including a plurality of antennas, wireless transmitting units for transmitting signals to a first user terminal through the antennas, and wireless receiving units for receiving signals from the first user terminal through the antennas, the communication device comprising:
- a transmission signal processing unit configured to output a transmission signal to be transmitted to the first user terminal;
a received signal processing unit, to which received signals from the plurality of the wireless receiving units are combined and input through a plurality of paths as many as the number not larger than the number of the antennas provided on the remote units, the received signal processing unit specifying a remote unit subjected to interference by a second user terminal different from the first user terminal; and
a switch configured to adjust a reception gain of each of the wireless receiving units,wherein the switch decreases the reception gain of the wireless receiving unit included in N−
1 remote units out of the N remote units in a predetermined measurement section, andthe received signal processing unit calculates a correlation value between the combined received signals and a reference signal transmitted by the second user terminal in the measurement section to judge that the remote unit of which reception gain is not decreased is subjected to the interference by the second user terminal when the correlation value is larger than a predetermined threshold.
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Accused Products
Abstract
According to one embodiment, a communication device communicates with N remote units. Each remote unit includes a plurality of antennas, wireless transmitting units, and wireless receiving units. The communication device is provided with a received signal processing unit, to which received signals by a plurality of the wireless receiving units are combined and input, and which specifies the remote unit subjected to interference, and a switch which decreases a reception gain of the wireless receiving unit included in N−1 remote units out of the N remote units in a predetermined measurement section. The received signal processing unit calculates a correlation value between the combined received signals and a reference signal transmitted by a user terminal connected to another base station system in the measurement section and specifies the remote unit subjected to the interference by the second user terminal based on the correlation value.
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Citations
20 Claims
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1. A communication device for communicating with N (N is an integer not smaller than 2) remote units, each remote unit including a plurality of antennas, wireless transmitting units for transmitting signals to a first user terminal through the antennas, and wireless receiving units for receiving signals from the first user terminal through the antennas, the communication device comprising:
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a transmission signal processing unit configured to output a transmission signal to be transmitted to the first user terminal; a received signal processing unit, to which received signals from the plurality of the wireless receiving units are combined and input through a plurality of paths as many as the number not larger than the number of the antennas provided on the remote units, the received signal processing unit specifying a remote unit subjected to interference by a second user terminal different from the first user terminal; and a switch configured to adjust a reception gain of each of the wireless receiving units, wherein the switch decreases the reception gain of the wireless receiving unit included in N−
1 remote units out of the N remote units in a predetermined measurement section, andthe received signal processing unit calculates a correlation value between the combined received signals and a reference signal transmitted by the second user terminal in the measurement section to judge that the remote unit of which reception gain is not decreased is subjected to the interference by the second user terminal when the correlation value is larger than a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A base station, comprising:
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a communication device for communicating with N (N is an integer not smaller than
2) remote units, each remote unit including a plurality of antennas, wireless transmitting units for transmitting signals to a first user terminal through the antennas, and wireless receiving units for receiving signals from the first user terminal through the antennas, the communication device including;a transmission signal processing unit configured to output a transmission signal to be transmitted to the first user terminal; a received signal processing unit, to which received signals from the plurality of the wireless receiving units are combined and input through a plurality of paths as many as the number not larger than the number of the antennas provided on the remote units, the received signal processing unit specifying a remote unit subjected to interference by a second user terminal different from the first user terminal; and a switch configured to adjust a reception gain of each of the wireless receiving units, wherein the switch decreases the reception gain of the wireless receiving unit included in N−
1 remote units out of the N remote units in a predetermined measurement section, andthe received signal processing unit calculates a correlation value between the combined received signals and a reference signal transmitted by the second user terminal in the measurement section to judge that the remote unit of which reception gain is not decreased is subjected to the interference by the second user terminal when the correlation value is larger than a predetermined threshold; and an interface unit configured to perform communication between the transmission signal processing unit and the received signal processing unit and an upper network.
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20. A base station system, comprising:
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N (N is an integer not smaller than
2) remote units, each remote unit including a plurality of antennas, wireless transmitting units configured to transmit signals to a first user terminal through the antennas, and wireless receiving units configured to receive the signals from the first user terminal through the antennas;a base station; and a hub unit, wherein the base station includes a communication device for communicating with the N remote units, the communication device including a transmission signal processing unit configured to output a transmission signal to be transmitted to the first user terminal, a received signal processing unit, to which received signals from the plurality of the wireless receiving units are combined and input through a plurality of paths as many as the number not larger than the number of the antennas provided on the remote units, the received signal processing unit specifying a remote unit subjected to interference by a second user terminal different from the first user terminal, and a switch configured to adjust a reception gain of each of the wireless receiving units, wherein the switch decreases the reception gain of the wireless receiving unit included in N−
1 remote units out of the N remote units in a predetermined measurement section, andthe received signal processing unit calculates a correlation value between the combined received signals and a reference signal transmitted by the second user terminal in the measurement section to judge that the remote unit of which reception gain is not decreased is subjected to the interference by the second user terminal when the correlation value is larger than a predetermined threshold, and an interface unit configured to perform communication between the transmission signal processing unit and the received signal processing unit and an upper network, and the hub unit includes a distributor configured to distribute the transmission signal output from the transmission signal processing unit to the wireless transmitting units, and a combining unit configured to combine the signals received by the wireless receiving units and output the combined signal to the received signal processing unit.
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Specification