Method and device for narrowband cellular communication

A method in a UE for relay communication, comprising:

• receiving a first signaling, or transmitting a first signaling, or receiving a second signaling;
• and
• transmitting a first radio signal in a first subframe group;
• wherein the first subframe group comprises one or more subframes, and the second subframe group comprises one or more subframes;
• the first signaling is used for determining the first subframe group, and the first signaling is used for determining the second subframe group;
• the second signaling is used for determining the first subframe group, and the second signaling is used for determining the second subframe group;
• the first radio signal is used for determining the second radio signal;
• the second radio signal is transmitted in the second subframe group;
• the UE is a first node, a receiver of the second radio signal comprises a second node, and the first node and the second node are non-co-located;
• a transmitter of the second radio signal is a receiver of the first radio signal;
• and the second radio signal comprises a first HARQ-ACK, and the first HARQ-ACK indicates whether the first radio signal is correctly decoded.

A method in a base station for relay communication, comprising:

• transmitting a first signaling, wherein the first signaling is used for determining a first subframe group, and the first signaling is used for determining a second subframe group;
• or transmitting a second signaling, wherein the second signaling is used for determining a first subframe group, and the second signaling is used for determining a second subframe group;
• or transmitting a third signaling, wherein the third signaling comprises scheduling information, and the first signaling comprises the scheduling information included in the third signaling;
• and
• receiving a second radio signal in the second subframe group;
• wherein the first subframe group comprises one or more subframes, and the second subframe group comprises one or more subframes;
• the second radio signal is related to a first radio signal;
• the first radio signal is transmitted in the first subframe group;
• a transmitter of the first radio signal is a first node, the base station is a second node, and the first node and the second node are non-co-located;
• the scheduling information comprises at least one among information relevant to the first subframe group, frequency domain resources occupied by the first radio signal in the first subframe group, an MCS for the first radio signal, an RV for the first radio signal, a HARQ process number for the first radio signal, and an NDI for the first radio signal;
• and the second radio signal comprises a first HARQ-ACK, and the first HARQ-ACK indicates whether the first radio signal is correctly decoded.

A UE for relay communication, comprising:

• a first receiver, receiving a first signaling;
• a second receiver, receiving a first radio signal in a first subframe group;
• and
• a first transmitter, transmitting a second radio signal in a second subframe group;
• wherein the first subframe group comprises one or more subframes, and the second subframe group comprises one or more subframes;
• the first signaling is used for determining the first subframe group, and the first signaling is used for determining the second subframe group;
• the first radio signal is used for determining the second radio signal;
• a transmitter of the first radio signal is a first node, a receiver of the second radio signal comprises a second node, and the first node and the second node are non-co-located;
• and the second radio signal comprises a first HARQ-ACK, and the first HARQ-ACK indicates whether the first radio signal is correctly decoded.

A UE for relay communication, comprising:

• a first transceiver, receiving a first signaling, or transmitting a first signaling, or receiving a second signaling;
• and
• a second transmitter, transmitting a first radio signal in a first subframe group;
• wherein the first subframe group comprises one or more subframes, and the second subframe group comprises one or more subframes;
• the first signaling is used for determining the first subframe group, and the first signaling is used for determining the second subframe group;
• the second signaling is used for determining the first subframe group, and the second signaling is used for determining the second subframe group;
• the first radio signal is used for determining the second radio signal;
• the second radio signal is transmitted in the second subframe group;
• the UE is a first node, a receiver of the second radio signal comprises a second node, and the first node and the second node are non-co-located;
• a transmitter of the second radio signal is a receiver of the first radio signal;
• and the second radio signal comprises a first HARQ-ACK, and the first HARQ-ACK indicates whether the first radio signal is correctly decoded.

A base station for relay communication, comprising:

• a third transmitter, transmitting a first signaling, wherein the first signaling is used for determining a first subframe group, and the first signaling is used for determining a second subframe group;
• or transmitting a second signaling, wherein the second signaling is used for determining a first subframe group, and the second signaling is used for determining a second subframe group;
• or transmitting a third signaling, wherein the third signaling comprises scheduling information, and the first signaling comprises the scheduling information included in the third signaling;
• and
• a second transceiver, receiving a second radio signal in the second subframe group;
• wherein the first subframe group comprises one or more subframes, and the second subframe group comprises one or more subframes;
• the second radio signal is related to a first radio signal;
• the first radio signal is transmitted in the first subframe group;
• a transmitter of the first radio signal is a first node, the base station is a second node, and the first node and the second node are non-co-located;
• the scheduling information comprises at least one among information relevant to the first subframe group, frequency domain resources occupied by the first radio signal in the first subframe group, an MCS for the first radio signal, an RV for the first radio signal, a HARQ process number for the first radio signal, and an NDI for the first radio signal;
• and the second radio signal comprises a first HARQ-ACK, and the first HARQ-ACK indicates whether the first radio signal is correctly decoded.