Dedicated reference signal design for network MIMO
First Claim
1. A method performed by a mobile device in a coordinated multipoint (CoMP) communication, comprising:
- receiving from a first cell a first dedicated reference signal for use by the mobile device, the first dedicated reference signal comprising a pilot modulation symbol having a first beam direction corresponding to first beam coefficients applied by the first cell;
receiving from a second cell a second dedicated reference signal for use by the mobile device, the second dedicated reference signal comprising the pilot modulation symbol having a second beam direction corresponding to second beam coefficients applied by the second cell in cooperation with the first cell;
demodulating, by the mobile device, a data communication comprising first and second data modulation symbols based on the respective first and second pilot modulation symbols, said first and second data modulation symbols being received from the respective first and second cell and having same beam directions as said first and second pilot symbols.
2 Assignments
0 Petitions
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
34 Claims
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1. A method performed by a mobile device in a coordinated multipoint (CoMP) communication, comprising:
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receiving from a first cell a first dedicated reference signal for use by the mobile device, the first dedicated reference signal comprising a pilot modulation symbol having a first beam direction corresponding to first beam coefficients applied by the first cell; receiving from a second cell a second dedicated reference signal for use by the mobile device, the second dedicated reference signal comprising the pilot modulation symbol having a second beam direction corresponding to second beam coefficients applied by the second cell in cooperation with the first cell; demodulating, by the mobile device, a data communication comprising first and second data modulation symbols based on the respective first and second pilot modulation symbols, said first and second data modulation symbols being received from the respective first and second cell and having same beam directions as said first and second pilot symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A mobile device 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 from a first cell a first dedicated reference signal for use by the mobile device, the first dedicated reference signal comprising a pilot modulation symbol having a first beam direction corresponding to first beam coefficients applied by the first cell; receive from a second cell a second dedicated reference signal for use by the mobile device, the second dedicated reference signal comprising the pilot modulation symbol having a second beam direction corresponding to second beam coefficients applied by the second cell in cooperation with the first cell; demodulate a data communication comprising first and second data modulation symbols based on the respective first and second pilot modulation symbols, said first and second data modulation symbols being received from the respective first and second cell and having same beam directions as said first and second pilot symbols. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A mobile device for wireless communication, comprising:
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means for receiving from a first cell a first dedicated reference signal for use by the mobile device, the first dedicated reference signal comprising a pilot modulation symbol having a first beam direction corresponding to first beam coefficients applied by the first cell; means for receiving from a second cell a second dedicated reference signal for use by the mobile device, the second dedicated reference signal comprising the pilot modulation symbol having a second beam direction corresponding to second beam coefficients applied by the second cell in cooperation with the first cell; means for demodulating a data communication comprising first and second data modulation symbols based on the respective first and second pilot modulation symbols, said first and second data modulation symbols being received from the respective first and second cell and having same beam directions as said first and second pilot symbols. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to:
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receive from a first cell a first dedicated reference signal for use by a mobile device, the first dedicated reference signal comprising a pilot modulation symbol having a first beam direction corresponding to first beam coefficients applied by the first cell; receive from a second cell a second dedicated reference signal for use by the mobile device, the second dedicated reference signal comprising the pilot modulation symbol having a second beam direction corresponding to second beam coefficients applied by the second cell in cooperation with the first cell; demodulate a data communication comprising first and second data modulation symbols based on the respective first and second pilot modulation symbols, said first and second data modulation symbols being received from the respective first and second cell and having same beam directions as said first and second pilot symbols.
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Specification