Discovery reference signal design for coordinated multipoint operations in heterogeneous networks
First Claim
1. A method for wireless communications by a user equipment (UE), comprising:
- receiving a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting distinct discovery reference signals (RSs), wherein;
the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS),CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, andresources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS;
receiving the distinct discovery RSs transmitted from the plurality of different transmission points on the distinct resources; and
calculating at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs.
1 Assignment
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Accused Products
Abstract
Certain aspects of the present disclosure relate to techniques that may be used to discover transmission points in heterogeneous networks (HetNet) that involves coordinated multi-point (CoMP) transmission and reception. Certain aspects of the present disclosure provide a method for wireless communications by a user equipment (UE). The method generally includes receiving a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting discovery reference signals (RSs), receiving distinct discovery RSs transmitted from the plurality of different transmission points, and calculating at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs.
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Citations
36 Claims
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1. A method for wireless communications by a user equipment (UE), comprising:
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receiving a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting distinct discovery reference signals (RSs), wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; receiving the distinct discovery RSs transmitted from the plurality of different transmission points on the distinct resources; and calculating at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for wireless communication by a transmission point, comprising:
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determining resources for transmitting a discovery reference signal (RS) for discovery by a user equipment (UE), the determined resources being distinct from resources used for transmitting discovery RS by one or more other transmission points involved in coordinated multipoint (CoMP) operations with the UE, wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; transmitting a configuration indicating the determined resources used by each transmission point; and transmitting the discovery RS using the determined resources. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An apparatus for wireless communications by a user equipment (UE), comprising:
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means for receiving a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting distinct discovery reference signals (RSs), wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; means for receiving the distinct discovery RSs transmitted from the plurality of different transmission points on the distinct resources; and means for calculating at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus for wireless communication by a transmission point, comprising:
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means for determining resources for transmitting a discovery reference signal (RS) for discovery by a user equipment (UE), the determined resources being distinct from resources used for transmitting discovery RS by one or more other transmission points involved in coordinated multipoint (CoMP) operations with the UE, wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; means for transmitting a configuration indicating the determined resources used by each transmission point; and means for transmitting the discovery RS using the determined resources. - View Dependent Claims (29, 30, 31, 32)
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33. An apparatus for wireless communications by a user equipment (UE), comprising:
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at least one processor configured to; receive a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting distinct discovery reference signals (RSs), wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; receive the distinct RSs transmitted from the plurality of different transmission points on the distinct resources; and calculate at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs; and a memory coupled with the at least one processor.
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34. An apparatus for wireless communication by a transmission point, comprising:
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at least one processor configured to; determine resources for transmitting a discovery reference signal (RS) for discovery by a user equipment (UE), the determined resources being distinct from resources used for transmitting discovery RS by one or more other transmission points involved in coordinated multipoint (CoMP) operations with the UE, wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; transmit a configuration indicating the determined resources used by each transmission point; and transmit the discovery RS using the determined resources; and a memory coupled with the at least one processor.
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35. A non-transitory computer readable medium having instructions stored thereon, the instructions executable by one or more processors for:
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receiving a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting distinct discovery reference signals (RSs), wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; receiving the distinct discovery RSs transmitted from the plurality of different transmission points on the distinct resources; and calculating at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs.
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36. A non-transitory computer readable medium having instructions stored thereon, the instructions executable by one or more processors for:
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determining resources for transmitting a discovery reference signal (RS) for discovery by a user equipment (UE), the determined resources being distinct from resources used for transmitting discovery RS by one or more other transmission points involved in coordinated multipoint (CoMP) operations with the UE, wherein; the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS), CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, and resources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; transmitting a configuration indicating the determined resources used by each transmission point; and transmitting the discovery RS using the determined resources.
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Specification