Base station device, mobile station device, communication system, transmission method, reception method, and communication method
First Claim
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1. A base station device communicating with a mobile station device in a first cell, the base station device comprising:
- transmitter circuitry that notifies, to the mobile station device by Radio Resource Control (RRC) signaling, assistance information concerning a frequency of the first cell;
whereinthe assistance information is information on a cell-specific reference signal (CRS) of another cell,the assistance information includes a cell ID, the number of antenna ports for the CRS, and subframe information indicating subframes that are reserved for Multimedia Broadcast multicast service Single Frequency Network (MBSFN), andthe assistance information is used by the mobile station device to mitigate interference caused by the CRS while data demodulation is being performed by the mobile station device.
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Abstract
Inter-cell Interference is efficiently mitigated or suppressed in a radio communication system constituting a heterogeneous network. In the radio communication system in which a base station device and a mobile station device communicate with each other, the base station device notifies, to the mobile station device, control information related to a cell-specific reference signal that is specific to a cell ID of another base station device different from the aforesaid base station device, the control information containing information regarding number of ports for the cell-specific reference signal.
23 Citations
24 Claims
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1. A base station device communicating with a mobile station device in a first cell, the base station device comprising:
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transmitter circuitry that notifies, to the mobile station device by Radio Resource Control (RRC) signaling, assistance information concerning a frequency of the first cell;
whereinthe assistance information is information on a cell-specific reference signal (CRS) of another cell, the assistance information includes a cell ID, the number of antenna ports for the CRS, and subframe information indicating subframes that are reserved for Multimedia Broadcast multicast service Single Frequency Network (MBSFN), and the assistance information is used by the mobile station device to mitigate interference caused by the CRS while data demodulation is being performed by the mobile station device. - View Dependent Claims (2, 3, 4, 17, 18)
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5. A mobile station device communicating with a base station device in a first cell, the mobile station device comprising:
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receiver circuitry that receives, from the base station device by Radio Resource Control (RRC) signaling, assistance information concerning a frequency of the first cell;
whereinthe assistance information is information on a cell-specific reference signal (CRS) of another cell, the assistance information includes a cell ID, the number of antenna ports for the CRS, and subframe information indicating subframes that are reserved for Multimedia Broadcast multicast service Single Frequency Network (MBSFN), and the assistance information is used by the mobile station device to mitigate interference caused by the CRS while the mobile station device is performing data demodulation. - View Dependent Claims (6, 7, 8, 19, 20)
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9. A transmission method in a base station device communicating with a mobile station device in a first cell, the transmission method comprising the step of:
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notifying, to the mobile station device by Radio Resource Control (RRC) signaling, assistance information concerning a frequency of the first cell;
whereinthe assistance information is information on a cell-specific reference signal (CRS) of another cell, the assistance information includes a cell ID, the number of antenna ports for the CRS, and subframe information indicating subframes that are reserved for Multimedia Broadcast multicast service Single Frequency Network (MBSFN), and the assistance information is used by the mobile station device to mitigate interference caused by the CRS while data demodulation is being performed by the mobile station device. - View Dependent Claims (10, 11, 12, 21, 22)
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13. A reception method in a mobile station device communicating with a base station device in a first cell, the reception method comprising the step of:
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receiving, from the base station device by Radio Resource Control (RRC) signaling, assistance information concerning a frequency of the first cell;
whereinthe assistance information is information on a cell-specific reference signal (CRS) of another cell, the assistance information includes a cell ID, the number of antenna ports for the CRS, and subframe information indicating subframes that are reserved for Multimedia Broadcast multicast service Single Frequency Network (MBSFN), and the assistance information is used by the mobile station device to mitigate interference caused by the CRS while data demodulation is being performed by the mobile station device. - View Dependent Claims (14, 15, 16, 23, 24)
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Specification
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Current AssigneeSharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
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Original AssigneeSharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
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InventorsYoshimoto, Takashi, Shimezawa, Kazuyuki
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Primary Examiner(s)Chriss, Andrew
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Assistant Examiner(s)Fayed, Rasha
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Application NumberUS13/984,201Publication NumberTime in Patent Office1,992 DaysField of Search370329, 370535, 370341, 370208, 370312, 4554221, 455450, 4554522, 455561, 375260US Class CurrentCPC Class CodesH04J 11/0053 using co-ordinated multipoi...H04J 11/0056 Inter-base station aspectsH04W 72/23 in the downlink direction o...H04W 72/30 Resource management for bro...
