Reference signal detection
First Claim
1. A method for wireless communication, comprising:
- receiving a signal, the signal including at least a first cell signal from a first cell;
determining a transmission scheme associated with the received signal, the determined transmission scheme being one of a common reference signal (CRS) based transmission scheme or a user equipment reference signal (UE-RS) based transmission scheme, wherein the determining the transmission scheme comprisesdetermining that the transmission scheme includes the UE-RS based transmission scheme if a power metric is greater than a threshold, anddetermining that the transmission scheme includes the CRS based transmission scheme if the power metric is less than or equal to the threshold, andprocessing the received signal based, at least in part, on the determined transmission scheme.
1 Assignment
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Accused Products
Abstract
Aspects of the disclosure are related to identifying whether an apparatus (e.g., base station, access point, etc.) is transmitting using a CRS based transmission scheme or a UE-RS based transmission scheme. Such detection may be necessary for PDSCH interference cancellation (IC) of a neighboring cell since a UE may not know which transmission scheme is used by the neighboring cell. For instance, the UE may know the transmission scheme of the serving cell, but the UE may not know the transmission scheme of a neighboring non-serving cell. As such, aspects of the disclosure provide for a blind detection algorithm to identify or determine a transmission mode or transmission scheme of a neighboring cell to then apply interference cancellation (IC) to an interfering signal received from the neighboring cell.
23 Citations
32 Claims
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1. A method for wireless communication, comprising:
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receiving a signal, the signal including at least a first cell signal from a first cell; determining a transmission scheme associated with the received signal, the determined transmission scheme being one of a common reference signal (CRS) based transmission scheme or a user equipment reference signal (UE-RS) based transmission scheme, wherein the determining the transmission scheme comprises determining that the transmission scheme includes the UE-RS based transmission scheme if a power metric is greater than a threshold, and determining that the transmission scheme includes the CRS based transmission scheme if the power metric is less than or equal to the threshold, and processing the received signal based, at least in part, on the determined transmission scheme. - View Dependent Claims (2, 3, 4)
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5. A method for wireless communication, comprising:
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receiving a signal, the signal including at least a first cell signal from a first cell; deciding whether to use a rank associated with the received signal to determine a transmission scheme associated with the received signal; determining the transmission scheme; and processing the received signal based, at least in part, on the determined transmission scheme, wherein when the rank is used to determine the transmission scheme, the method further comprises; detecting one or more ranks associated with the received signal; and determining a number of common reference signal (CRS) ports, wherein the transmission scheme is determined to include a CRS based transmission scheme or a user equipment reference signal (UE-RS) based transmission scheme based, at least in part, on the one or more ranks associated with the received signal and the number of CRS ports. - View Dependent Claims (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 memory; and at least one processor coupled to the memory and configured to; receive a signal, the signal including at least a first cell signal from a first cell, determine a transmission scheme associated with the received signal, the determined transmission scheme being one of a common reference signal (CRS) based transmission scheme or a user equipment reference signal (UE-RS) based transmission scheme, wherein the at least one processor is configured to determine the transmission scheme by determining that the transmission scheme includes the UE-RS based transmission scheme if a power metric is greater than a threshold, and determining that the transmission scheme includes the CRS based transmission scheme if the power metric is less than or equal to the threshold, and process the received signal based, at least in part, on the determined transmission scheme. - View Dependent Claims (16, 17)
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18. An apparatus for wireless communication, comprising:
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a memory; and at least one processor coupled to the memory and configured to; receive a signal, the signal including at least a first cell signal from a first cell, decide whether to use a rank associated with the received signal to determine a transmission scheme associated with the received signal, determine the transmission scheme, and process the received signal based, at least in part, on the determined transmission scheme, wherein when the rank is used to determine the transmission scheme, the at least one processor is further configured to; detect one or more ranks associated with the received signal, and determine a number of common reference signal (CRS) ports, wherein the transmission scheme is determined to include a CRS based transmission scheme or a user equipment reference signal (UE-RS) based transmission scheme based, at least in part, on the one or more ranks associated with the received signal and the number of CRS ports. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for wireless communication, comprising:
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receiving a signal, the signal including at least a first cell signal from a first cell; determining a transmission scheme associated with the received signal, the determined transmission scheme being one of a common reference signal (CRS) based transmission scheme or a user equipment reference signal (UE-RS) based transmission scheme, wherein the determining the transmission scheme comprises determining that the transmission scheme includes the UE-RS based transmission scheme if a signal-to-noise (SNR) metric is greater than a threshold, and determining that the transmission scheme includes the CRS based transmission scheme if the SNR metric is less than or equal to the threshold, processing the received signal based, at least in part, on the determined transmission scheme. - View Dependent Claims (28, 29)
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30. An apparatus for wireless communication, comprising:
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a memory; and at least one processor coupled to the memory and configured to; receive a signal, the signal including at least a first cell signal from a first cell, determine a transmission scheme associated with the received signal, the determined transmission scheme being one of a common reference signal (CRS) based transmission scheme or a user equipment reference signal (UE-RS) based transmission scheme, wherein the at least one processor is configured to determine the transmission scheme by determining that the transmission scheme includes the UE-RS based transmission scheme if a signal-to-noise ratio (SNR) metric is greater than a threshold, and determining that the transmission scheme includes the CRS based transmission scheme if the SNR metric is less than or equal to the threshold; and process the received signal based, at least in part, on the determined transmission scheme. - View Dependent Claims (31, 32)
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Specification