Dedicated reference signal design for network MIMO
First Claim
1. A method performed by a first base station for using a dedicated reference signal for supporting Coordinated MultiPoint transmission, comprising:
- communicating with a second base station to coordinate a data transmission to a first user device from the first base station and the second base station;
applying a cluster-specific scrambling to a first pilot modulation symbol;
transmitting, in a first direction, the scrambled first pilot modulation symbol from the first base station such that transmission of the scrambled first pilot modulation symbol is coordinated with a transmission of the scrambled first pilot modulation symbol by the second base station in a second direction; and
transmitting, in the first direction, a first data modulation symbol of the data transmission from the first base station such that transmission of the first data modulation symbol is coordinated with a transmission of the first data modulation symbol by the second base station in the second direction.
1 Assignment
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Accused Products
Abstract
Aspects describe utilizing a dedicated reference signal for supporting Network MIMO, distributed MIMO, Coordinated MultiPoint, and the like. A data modulation symbol is transmitting in the same direction as a pilot modulation symbol is transmitted. Two or more wireless devices can coordinate communications such that transmission of the same pilot modulation symbol and the same data modulation symbol are transmitted to a device in different directions, each direction associated with a wireless device and intended for a particular mobile device. Cluster-specific scrambling and/or user-group specific scrambling can be employed and a scrambling code can be communicated prior to transmission of the pilot modulation symbols and data modulation symbols.
19 Citations
38 Claims
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1. A method performed by a first base station for using a dedicated reference signal for supporting Coordinated MultiPoint transmission, comprising:
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communicating with a second base station to coordinate a data transmission to a first user device from the first base station and the second base station; applying a cluster-specific scrambling to a first pilot modulation symbol; transmitting, in a first direction, the scrambled first pilot modulation symbol from the first base station such that transmission of the scrambled first pilot modulation symbol is coordinated with a transmission of the scrambled first pilot modulation symbol by the second base station in a second direction; and transmitting, in the first direction, a first data modulation symbol of the data transmission from the first base station such that transmission of the first data modulation symbol is coordinated with a transmission of the first data modulation symbol by the second base station in the second direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instruction stored in the memory, the instructions being executable by the processor to; communicate with a second base station to coordinate a data transmission to a first mobile device between a first base station and the second base station; apply a cluster-specific scrambling to a first pilot modulation symbol; transmit, in a first direction, the scrambled first pilot modulation symbol such that transmission of the scrambled first pilot modulation symbol is coordinated with a transmission of the scrambled first pilot modulation symbol by the second base station in a second direction; and transmit, in the first direction, a first data modulation symbol of the data transmission such that transmission of the first data modulation symbol is coordinated with a transmission of the first data modulation symbol by the second base station in the second direction. - View Dependent Claims (16, 17, 18, 19)
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20. An apparatus for wireless communications, comprising:
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means for communicating with a second base station to coordinate a data transmission to a first user device from a first base station and the second base station; means for applying a cluster-specific scrambling to a first pilot modulation symbol; means for transmitting in a first direction the scrambled first pilot modulation symbol from the first base station such that transmission of the scrambled first pilot modulation symbol is coordinated with a transmission of the scrambled first pilot modulation symbol by the second base station in a second direction; and means for transmitting in the first direction a first data modulation symbol of the data transmission from the first base station such that transmission of the first data modulation symbol is coordinated with a transmission of the first data modulation symbol by the second base station in the second direction. - View Dependent Claims (21, 22, 23)
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24. A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code comprising instructions executable to:
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communicate with a second base station to coordinate a data transmission to a first mobile device; apply a cluster-specific scrambling to a first pilot modulation symbol; transmit in a first direction the scrambled first pilot modulation symbol such that transmission of the scrambled first pilot modulation symbol is coordinated with a transmission of the scrambled first pilot modulation symbol by the second base station in a second direction; and transmit in the first direction a first data modulation symbol of the data transmission such that transmission of the first data modulation symbol is coordinated with a transmission of the first data modulation symbol by the second base station in the second direction. - View Dependent Claims (25, 26)
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27. A method performed by a mobile device for receiving a dedicated reference signal for supporting Coordinated MultiPoint, comprising:
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receiving a scrambled pilot modulation symbol from a first direction; receiving the scrambled pilot modulation symbol from a second direction substantially concurrent to the receiving the scrambled pilot modulation symbol from the first direction, wherein a cluster-specific scrambling is applied to the pilot modulation symbol by a first base station and a second base station before receiving from the first direction and before receiving from the second direction; receiving from the first direction a data modulation symbol intended for the mobile device; and receiving from the second direction the data modulation symbol intended for the mobile device, wherein the data modulation symbol is received at the mobile device in connection with a coordinated transmission between the first base station and at least the second base station. - View Dependent Claims (28, 29, 30)
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31. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to; receive a scrambled pilot modulation symbol from a first direction; receive the scrambled pilot modulation symbol from a second direction substantially concurrent to the receiving the scrambled pilot modulation symbol from the first direction, wherein a cluster-specific scrambling is applied to the pilot modulation symbol by a first base station and a second base station before receiving from the first direction and before receiving from the second direction; receive from the first direction a data modulation symbol; and receive from the second direction the data modulation symbol, wherein the data modulation symbol is received at the apparatus in connection with a coordinated transmission between the first base station and at least the second base station. - View Dependent Claims (32, 33)
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34. An apparatus for wireless communication, comprising:
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means for receiving a scrambled pilot modulation symbol from a first direction; means for receiving the scrambled pilot modulation symbol from a second direction substantially current to the receiving the scrambled pilot modulation symbol from the first direction, wherein a cluster-specific scrambling is applied to the pilot modulation symbol by a first base station and a second base station before receiving from the first direction and before receiving from the second direction; means for receiving from the first direction a data modulation symbol; and means for receiving from the second direction the data modulation symbol, wherein the data modulation symbol is received at the apparatus in connection with a coordinated transmission between the first base station and at least the second base station. - View Dependent Claims (35)
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36. A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code comprising instructions executable to:
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receive a scrambled pilot modulation symbol from a first direction; receive the scrambled pilot modulation symbol from a second direction substantially concurrent to the receiving the scrambled pilot modulation symbol from the first direction, wherein a cluster-specific scrambling is applied to the pilot modulation symbol by a first base station and a second base station before receiving from the first direction and before receiving from the second direction; receive from the first direction a data modulation symbol; and receive from the second direction the data modulation symbol, wherein the data modulation symbol is received in connection with a coordinated transmission between the first base station and at least the second base station. - View Dependent Claims (37, 38)
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Specification