Methods, Devices, and Systems for Device to Device (D2D) Data Transmission and Retransmission

A method, comprising:

• sending, by a network apparatus, first scheduling information indicating a plurality of sidelink (SL) resources for a plurality of SL transmissions, the plurality of SL resources including a first SL resource and a rest of the plurality of SL resources, the first SL resource is for a first terminal apparatus to send data in a first SL transmission of the plurality of SL transmissions to a second terminal apparatus, and the rest of the plurality of SL resources is for the first terminal apparatus to retransmit the data in a rest of the plurality of SL transmissions to the second terminal apparatus;
• and
• receiving, by the network apparatus, first feedback information after a last SL transmission of the plurality of SL transmissions, wherein the first feedback information indicates whether the second terminal apparatus successfully receives the data.

A method, comprising:

• receiving, by a first terminal apparatus, first scheduling information indicating a plurality of sidelink (SL) resources for a plurality of SL transmissions, the plurality of SL resources including a first SL resource and a rest of the plurality of SL resources, the first SL resource is for the first terminal apparatus to send data in a first SL transmission of the plurality of SL transmissions to a second terminal apparatus, and the rest of the plurality of SL resources is for the first terminal apparatus to retransmit the data in a rest of the plurality of SL transmissions to the second terminal apparatus;
• and
• sending, by the first terminal apparatus, first feedback information after a last SL transmission of the plurality of SL transmissions, wherein the first feedback information indicates whether the second terminal apparatus successfully receives the data.

A non-transitory computer readable medium storing instructions that, when executed by a computer, causes the computer to execute operations comprising:

• receiving, first scheduling information indicating a plurality of sidelink (SL) resources for a plurality of SL transmissions, the plurality of SL resources including a first SL resource and a rest of the plurality of SL resources, the first SL resource is for a first terminal apparatus to send data in a first SL transmission of the plurality of SL transmissions to a second terminal apparatus, and the rest of the plurality of SL resources is for the first terminal apparatus to retransmit the data in a rest of the plurality of SL transmissions to the second terminal apparatus;
• and
• sending, first feedback information after a last SL transmission of the plurality of SL transmissions, wherein the first feedback information indicates whether the second terminal apparatus successfully receives the data.