Techniques for reference signal interference canceling or rate matching
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, information that identifies an association between a first cell of a first radio access technology (RAT) and a second cell of a second RAT. The UE may perform a measurement for the first cell. The UE may determine that the measurement for the first cell satisfies a threshold value. The UE may perform an interference canceling operation for a reference signal of the second cell, or a de-weighting operation for one or more resource elements in which the reference signal interferes, based at least in part on the determination that the measurement for the first cell satisfies the threshold value and the association between the first cell and the second cell. Numerous other aspects are described.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a base station, information that identifies an association between a first cell of a first radio access technology (RAT) and a second cell of a second RAT, the association between the first cell of the first RAT and the second cell of the second RAT indicates an association of the first cell of the first RAT with one or more beams of the second cell of the second RAT;
performing a measurement for the first cell;
determining that the measurement for the first cell satisfies a threshold value; and
performing an interference canceling operation for a reference signal of the second cell, or a de-weighting operation for one or more resource elements in which the reference signal interferes, based at least in part on the determination that the measurement for the first cell satisfies the threshold value and the association between the first cell and the second cell.
2. The method of claim 1 , wherein the reference signal is a cell-specific reference signal, a channel state information reference signal, a primary synchronization signal, or a secondary synchronization signal.
3. The method of claim 1 , wherein the first RAT is a New Radio RAT and the second RAT is an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access RAT.
4. The method of claim 1 , wherein the measurement for the first cell is of a synchronization signal block, a tracking reference signal, or a channel state information reference signal.
5. The method of claim 1 , wherein the threshold value is a reference signal received power value, a received signal strength indicator value, a reference signal received quality value, a signal to interference plus noise ratio value, a path-loss estimate value, a modulation and coding scheme index value, a number of transmission layers, or an aggregation level.
6. The method of claim 1 , wherein the association between the first cell and the second cell further indicates at least one of:
the first cell and the second cell are time synchronized;
the first cell and the second cell are co-located; or
the first cell and the second cell use a same precoding.
7. The method of claim 1 , further comprising:
receiving information that identifies a configuration for cell-specific reference signals for the second cell,
wherein the configuration identifies at least one of a cell identifier for the second cell, a v-shift parameter, a bandwidth associated with the second cell, or a number of cell-specific reference signal antenna ports, and
wherein the interference canceling operation is performed based at least in part on the configuration for the cell-specific reference signals.
8. The method of claim 1 , further comprising:
receiving information that identifies at least one of a timing offset or a power offset between a downlink signal of the first cell and the reference signal of the second cell.
9. The method of claim 1 , further comprising:
receiving information identifying one or more cells of the first RAT for which the UE is to perform measurements, the one or more cells including the first cell.
10. The method of claim 1 , further comprising:
receiving a physical downlink shared channel (PDSCH) transmission on the first cell, the interference canceling operation being performed when the PDSCH transmission is received.
11. A method of wireless communication performed by a network entity, comprising:
generating information that identifies an association between a first cell of a first radio access technology (RAT) and a second cell of a second RAT, the association between the first cell of the first RAT and the second cell of the second RAT indicates an association of the first cell of the first RAT and one or more beams of the second cell of the second RAT; and
transmitting, to a user equipment (UE), the information that identifies the association between the first cell of the first RAT and the second cell of the second RAT.
12. The method of claim 11 , wherein the first RAT is a New Radio RAT and the second RAT is an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access RAT.
13. The method of claim 11 , wherein the association between the first cell and the second cell further indicates at least one of:
the first cell and the second cell are time synchronized;
the first cell and the second cell are co-located; or
the first cell and the second cell use a same precoding.
14. The method of claim 11 , further comprising:
transmitting information that identifies a configuration for cell-specific reference signals for the second cell,
wherein the configuration identifies at least one of a cell identifier for the second cell, a v-shift parameter, a bandwidth associated with the second cell, or a number of cell-specific reference signal antenna ports.
15. The method of claim 11 , further comprising:
transmitting information that identifies at least one of a timing offset or a power offset between a downlink signal of the first cell and a reference signal of the second cell.
16. The method of claim 11 , further comprising:
transmitting information identifying one or more cells of the first RAT for which the UE is to perform measurements, the one or more cells including the first cell.
17. A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive, from a base station, information that identifies an association between a first cell of a first radio access technology (RAT) and a second cell of a second RAT, the association between the first cell of the first RAT and the second cell of the second RAT indicates an association of the first cell of the first RAT with one or more beams of the second cell of the second RAT;
perform a measurement for the first cell;
determine that the measurement for the first cell satisfies a threshold value; and
perform an interference canceling operation for a reference signal of the second cell, or a de-weighting operation for one or more resource elements in which the reference signal interferes, based at least in part on the determination that the measurement for the first cell satisfies the threshold value and the association between the first cell and the second cell.
18. The UE of claim 17 , wherein the reference signal is a cell-specific reference signal, a channel state information reference signal, a primary synchronization signal, or a secondary synchronization signal.
19. The UE of claim 17 , wherein the measurement for the first cell is of a synchronization signal block, a tracking reference signal, or a channel state information reference signal.
20. The UE of claim 17 , wherein the threshold value is a reference signal received power value, a received signal strength indicator value, a reference signal received quality value, a signal to interference plus noise ratio value, a path-loss estimate value, a modulation and coding scheme index value, a number of transmission layers, or an aggregation level.
21. The UE of claim 17 , wherein the association between the first cell and the second cell further indicates at least one of:
the first cell and the second cell are time synchronized;
the first cell and the second cell are co-located; or
the first cell and the second cell use a same precoding.
22. The UE of claim 17 , wherein the one or more processors are further configured to:
receive information that identifies a configuration for cell-specific reference signals for the second cell,
wherein the configuration identifies at least one of a cell identifier for the second cell, a v-shift parameter, a bandwidth associated with the second cell, or a number of cell-specific reference signal antenna ports, and
wherein the interference canceling operation is performed based at least in part on the configuration for the cell-specific reference signals.
23. The UE of claim 17 , wherein the one or more processors are further configured to:
receive information that identifies at least one of a timing offset or a power offset between a downlink signal of the first cell and the reference signal of the second cell.
24. The UE of claim 17 , wherein the one or more processors are further configured to:
receive information identifying one or more cells of the first RAT for which the UE is to perform measurements, the one or more cells including the first cell.
25. A network entity for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
generate information that identifies an association between a first cell of a first radio access technology (RAT) and a second cell of a second RAT, the association between the first cell of the first RAT and the second cell of the second RAT indicates an association of the first cell of the first RAT with one or more beams of the second cell of the second RAT; and
transmit, to a user equipment (UE), the information that identifies the association between the first cell of the first RAT and the second cell of the second RAT.
26. The network entity of claim 25 , wherein the association between the first cell and the second cell further indicates at least one of:
the first cell and the second cell are time synchronized;
the first cell and the second cell are co-located; or
the first cell and the second cell use a same precoding.
27. The network entity of claim 25 , wherein the one or more processors are further configured to:
transmit information that identifies a configuration for cell-specific reference signals for the second cell,
wherein the configuration identifies at least one of a cell identifier for the second cell, a v-shift parameter, a bandwidth associated with the second cell, or a number of cell-specific reference signal antenna ports.
28. The network entity of claim 25 , wherein the one or more processors are further configured to:
transmit information that identifies at least one of a timing offset or a power offset between a downlink signal of the first cell and a reference signal of the second cell.