Quasi co-location identification of reference symbol ports for coordinated multi-point communication systems
First Claim
1. A method for identifying quasi co-located reference signal ports by a user equipment (UE), the method comprising:
- receiving downlink control information;
identifying, from the downlink control information, a channel state information reference signal (CSI-RS) port that is quasi co-located with a demodulation reference signal (DM-RS) port assigned to the UE;
identifying large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port; and
performing at least one of channel estimation, time synchronization, or frequency synchronization using the large scale properties for the assigned DM-RS port and the CSI-RS port.
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Accused Products
Abstract
Methods and apparatuses indicate and identify quasi co-located reference signal ports. A method of identifying by a UE includes identifying, from downlink control information, a CSI-RS port that is quasi co-located with a DM-RS port assigned to the UE. The method includes identifying large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the DM-RS port. Another method for identifying by a UE includes identifying, from downlink control information, a CRS port that is quasi co-located with a CSI-RS port configured for the UE. The method includes identifying large scale properties for the configured CSI-RS port based on large scale properties for the CRS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the CSI-RS port.
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Citations
30 Claims
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1. A method for identifying quasi co-located reference signal ports by a user equipment (UE), the method comprising:
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receiving downlink control information; identifying, from the downlink control information, a channel state information reference signal (CSI-RS) port that is quasi co-located with a demodulation reference signal (DM-RS) port assigned to the UE; identifying large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port; and performing at least one of channel estimation, time synchronization, or frequency synchronization using the large scale properties for the assigned DM-RS port and the CSI-RS port. - View Dependent Claims (2, 3, 4)
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5. A method for indicating quasi co-located reference signal ports by a network entity, the method comprising:
providing, in downlink control information for a user equipment (UE), an indication of a channel state information reference signal (CSI-RS) port that is quasi co-located with a DM-RS port assigned to the UE for the UE to identify large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port to perform at least one of channel estimation, time synchronization, or frequency synchronization using the identified large scale properties for the assigned DM-RS port and the CSI-RS port. - View Dependent Claims (6, 7)
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8. An apparatus in a user equipment (UE) configured to identify quasi co-located reference signal ports, the apparatus comprising:
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a receiver configured to receive downlink control information; and a controller configured to; identify, from the downlink control information, a channel state information reference signal (CSI-RS) port that is quasi co-located with a demodulation reference signal (DM-RS) port assigned to the UE; identify large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port; and perform at least one of channel estimation, time synchronization, or frequency synchronization using the large scale properties for the assigned DM-RS port and the CSI-RS port. - View Dependent Claims (9, 10, 11)
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12. An apparatus in a network entity configured to indicate quasi co-located reference signal ports, the apparatus comprising:
a transmitter configured to provide, in downlink control information for a user equipment (UE), an indication of a channel state information reference signal (CSI-RS) port that is quasi co-located with a demodulation reference signal (DM-RS) port assigned to the UE for the UE to identify large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port to perform at least one of channel estimation, time synchronization, or frequency synchronization using the identified large scale properties for the assigned DM-RS port and the CSI-RS port. - View Dependent Claims (13, 14)
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15. A method for identifying quasi co-located reference signal ports by a user equipment (UE), the method comprising:
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receiving downlink control information; identifying, from the downlink control information, a cell-specific reference signal (CRS) port that is quasi co-located with a channel state information reference signal (CSI-RS) port configured for the UE; identifying large scale properties for the configured CSI-RS port based on large scale properties for the CRS port; and performing at least one of channel estimation, time synchronization, or frequency synchronization using the large scale properties for the CSI-RS port. - View Dependent Claims (16, 17, 18)
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19. A method for indicating quasi co-located reference signal ports by a network entity, the method comprising:
providing, in downlink control information for a user equipment (UE), an indication of a cell-specific reference signal (CRS) port that is quasi co-located with a channel state information reference signal (CSI-RS) port configured for the UE for the UE to identify large scale properties for the configured CSI-RS port based on large scale properties for the CRS port to perform at least one of channel estimation, time synchronization, or frequency synchronization using the identified large scale properties for the CSI-RS port. - View Dependent Claims (20, 21, 22)
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23. An apparatus in a user equipment (UE) configured to identify quasi co-located reference signal ports, the apparatus comprising:
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a receiver configured to receive downlink control information; and a controller configured to; identify, from the downlink control information, a cell-specific reference signal (CRS) port that is quasi co-located with a channel state information reference signal (CSI-RS) port configured for the UE; identify large scale properties for the configured CSI-RS port based on large scale properties for the CRS port; and perform at least one of channel estimation, time synchronization, or frequency synchronization using the large scale properties for the CSI-RS port. - View Dependent Claims (24, 25, 26)
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27. An apparatus in a network entity configured to indicate quasi co-located reference signal ports, the apparatus comprising:
a transmitter configured to provide, in downlink control information for a user equipment (UE), an indication of a cell-specific reference signal (CRS) port that is quasi co-located with a channel state information reference signal (CSI-RS) port configured for the UE for the UE to identify large scale properties for the configured CSI-RS port based on large scale properties for the CRS port to perform at least one of channel estimation, time synchronization, or frequency synchronization using the identified large scale properties for the CSI-RS port. - View Dependent Claims (28, 29, 30)
Specification