Network signaling for network-assisted interference cancellation and suppression
Embodiments of the invention are directed to a cellular communication network that can determine whether communications between one base station-UE pair may interfere with another UE that is in the same cell or a different cell. The network identifies interference parameters associated with interference signals that may be received by a UE. The interference signals may be generated by the base station itself, such as communications with other UEs, or by a neighboring base station. The base station transmits the interference parameters to the UE. The UE receives the one or more parameters comprising information about signals expected to cause intra-cell or inter-cell interference. The UE then processes received signals using the one or more parameters to suppress the intra-cell or inter-cell interference.
1. A method, comprising:
receiving, at a user equipment (UE), one or more parameters comprising information about signals expected to cause intra-cell or inter-cell interference at the UE;
processing received signals at the UE using the one or more parameters to suppress the intra-cell or inter-cell interference;
receiving, at the UE, a first set of parameters signaled on a wideband basis, the first set of parameters applicable to all physical resource blocks (PRBs) in assigned frequency resources; and
receiving a second set of parameters signaled on a narrow-band basis, the second set of parameters applicable to each PRB pair or each Precoding Resource Block Group (PRG) in an assigned frequency resource of the UE.
2. A base station, comprising:
a processor circuit configured to:
identify interference parameters associated with interference signals received by a user equipment, wherein the interference signals are generated by the base station or by a neighboring base station;
transmit the interference parameters to the user equipment;
signal a first set of parameters to user equipment on a wideband basis, the first set of parameters applicable to all physical resource blocks (PRBs) in assigned frequency resources; and
signal a second set of parameters to user equipment on a narrow-band basis, the second set of parameters applicable to each PRB pair or each Precoding Resource Block Group (PRG) in an assigned frequency resource of the UE.
3. A method, comprising:
receiving, at a user equipment (UE),one or more parameters comprising information about signals expected to cause intra-cell or inter-cell interference at the UE, wherein the one or more parameters identify a virtual cell ID of a neighboring interfering cell used as an initialization seed for the pseudo-random sequence generator for Demodulation Reference Signal (DMRS) of the neighboring interfering cell and wherein the one or more parameters identify a System-Frame-Number (SFN) of an interference signal and wherein the SFN of a source signal and the interference signal are not aligned; and
processing received signals at the UE using the one or more parameters to suppress the intra-cell or inter-cell interference.
4. A method, comprising:
receiving, at a user equipment (UE), one or more parameters comprising information about signals expected to cause intra-cell or inter-cell interference at the UE, wherein the one or more parameters identify a virtual cell ID of a neighboring interfering cell used as an initialization seed for the pseudo-random sequence generator for Demodulation Reference Signal (DMRS) of the neighboring interfering cell, wherein the one or more parameters identify a System-Frame-Number (SFN) of an interference signal and wherein the SFN of a source signal and the interference signal are not aligned; and
wherein the parameters are received using Radio Resource Control (RRC)-signaling.
5. A user equipment (UE) device, comprising:
a processor circuit configured to:
receive interference parameters with the interference parameters comprising information about signals expected to cause intra-cell or inter-cell interference, wherein one or more of the interference parameters identify a virtual cell ID of a neighboring interfering cell used as an initialization seed for the pseudo-random sequence generator for Demodulation Reference Signal (DMRS) of the neighboring interfering cell, wherein one or more of the interference parameters identify a System-Frame-Number (SFN) of an interference signal and wherein the SFN of a source signal and the interference signal are not aligned; and
wherein the parameters are received using Radio Resource Control (RRC)-signaling.