Interference cancelation feedback method, related apparatus, and system

An interference cancelation feedback apparatus, comprising:

• a memory;
• and
• a processor coupled the memory and configured to:
• decode an interfering cell signal to obtain a decoding result;
• generate a channel quality indicator (CQI) of a serving cell according to the decoding result and a received signal which comprises
• the serving cell signal and the interfering cell signal, wherein an interfering cell interferes with the serving cell of user equipment, and wherein the generating the CQI comprises determining whether to cancel a reconstructed signal of the interfering cell signal;
• generate interference cancelation indication information, wherein the interference cancelation indication information indicates a situation of interference cancelation for the interfering cell performed on the received signal by the user equipment;
• feed back the CQI of the serving cell to a network side;
• and
• feed back the interference cancelation indication information to the network side, wherein the interference cancelation indication information and the CQI of the serving cell are used by the network side to schedule the user equipment, wherein
• the interference cancelation indication information indicates:
• that the user equipment has completed the interference cancelation on the received signal,
• that the user equipment does perform the interference cancelation on the received signal, or
• whether the decoding result is correct before the interference cancelation is performed, and
• wherein the generating the channel quality indicator CQI comprises:
• canceling the reconstructed signal of the interfering cell signal from the received signal without regard to whether the decoding result is correct, and using a CQI generated after the interference cancelation as the CQI of the serving cell, wherein the interference cancelation indication information indicates whether the decoding result before the interference cancelation is performed is correct.

A user equipment scheduling method, comprising:

• receiving interference cancelation indication information sent by user equipment, wherein the interference cancelation indication information indicates a situation of interference cancelation performed on a received signal by the user equipment, wherein the received signal of the user equipment comprises a serving cell signal and an interfering cell signal, wherein an interfering cell interferes with a serving cell of the user equipment;
• receiving a channel quality indicator (CQI) of the serving cell sent by the user equipment;
• and
• scheduling the user equipment according to the interference cancelation indication information and the CQI of the serving cell,
• wherein the interference cancelation indication information used to indicate the situation of interference cancelation is based on whether a decoding result of the interfering cell signal is correct,
• wherein the CQI of the serving cell was generated by determining whether to cancel a reconstructed signal of the interfering cell signal,
• wherein the interference cancelation indication information indicates:
• that the user equipment has completed the interference cancelation on the received signal,
• that the user equipment does perform the interference cancelation on the received signal, or
• whether the decoding result is correct before the interference cancelation is performed, and
• wherein the generating the CQI further comprises:
• when the decoding result is correct, canceling the reconstructed signal of the interfering cell signal from the received signal, and using a CQI generated after the interference cancelation as the CQI of the serving cell, wherein the interference cancelation indication information indicates that the user equipment has already completed the interference cancelation on the received signal.

User equipment, comprising:

• a memory;
• and
• a processor coupled to the memory and configured to:
• decode an interfering cell signal to obtain a decoding result;
• generate a channel quality indicator (CQI) of a serving cell according to the decoding result and a received signal which comprises the serving cell signal and the interfering cell signal, wherein an interfering cell interferes with the serving cell of the user equipment, and wherein the generating the CQI comprises determining whether to cancel a reconstructed signal of the interfering cell signal;
• generate interference cancelation indication information, wherein the interference cancelation indication information indicates a situation of interference cancelation for the interfering cell performed on the received signal by the equipment;
• feed back the CQI of the serving cell to a network side;
• and
• feed back the interference cancelation indication information to the network side, wherein the interference cancelation indication information and the CQI of the serving cell are used by the network side to schedule the user equipment, wherein the interference cancelation indication information indicates:
• that the user equipment has completed the interference cancelation on the received signal,
• that the user equipment does perform the interference cancelation on the received signal, or
• whether the decoding result is correct before the interference cancelation is performed, and
• wherein the generating, by the processor, of the CQI further comprises:
• when the decoding result is correct, canceling the reconstructed signal of the interfering cell signal from the received signal, and using a CQI generated after the interference cancelation as the CQI of the serving cell, wherein the interference cancelation indication information indicates that the user equipment has already completed the interference cancelation on the received signal.

A network device, comprising:

• a memory;
• and
• a processor coupled to the memory and configured to:
• receive interference cancelation indication information sent by user equipment, wherein the interference cancelation indication information indicates a situation of interference cancelation performed on a received signal by the user equipment, wherein the received signal of the user equipment comprises a serving cell signal and an interfering cell signal, wherein an interfering cell interferes with a serving cell of the user equipment, and wherein the interference cancellation indication information is one of interference cancellation acknowledgement (ACK) to indicate interference cancellation and interference cancellation negative acknowledgement (NACK) to indicate no interference cancellation;
• receive a channel quality indicator (CQI) of the serving cell sent by the user equipment;
• and
• schedule the user equipment according to the interference cancelation indication information and the CQI of the serving cell,
• wherein the interference cancelation indication information used to indicate the situation of interference cancelation is based on whether a decoding result of the interfering cell signal is correct,
• wherein the CQI of the serving cell was generated by determining whether to cancel a reconstructed signal of the interfering cell signal, and
• wherein the interference cancelation indication information indicates:
• that the user equipment has completed the interference cancelation on the received signal,
• that the user equipment does perform the interference cancelation on the received signal, or
• whether the decoding result is correct before the interference cancelation is performed, and
• wherein the generating the CQI further comprises:
• when the decoding result is correct, canceling the reconstructed signal of the interfering cell signal from the received signal, and using a CQI generated after the interference cancelation as the CQI of the serving cell, wherein the interference cancelation indication information indicates that the user equipment has already completed the interference cancelation on the received signal.