Method for transmitting data via sidelink and terminal

A method for data transmission via a sidelink, comprising:

• receiving, by a transmitting terminal, indication information of a sidelink resource transmitted by a scheduling terminal;
• determining, by the transmitting terminal, a first transmission resource and transmission parameter for transmitting sidelink data according to the indication information of the sidelink resource;
• and
• transmitting, by the transmitting terminal, the sidelink data to a receiving terminal with the first transmission resource and the transmission parameter;
• wherein the indication information of the sidelink resource comprises sidelink resource pool information, and
• determining the first transmission resource and transmission parameter for transmitting the sidelink data according to the indication information of the sidelink resource comprises:
• autonomously selecting the first transmission resource and transmission parameter for transmitting the sidelink data from the sidelink resource pool information,
• wherein the indication information of the sidelink resource comprises sidelink resource scheduling grant information, and
• before receiving the indication information of the sidelink resource transmitted by the scheduling terminal, the method further comprises:
• transmitting third physical control signaling to the scheduling terminal, wherein the third physical control signaling comprising the sidelink resource SR;
• and
• transmitting first high-layer control signaling to the scheduling terminal, wherein the first high-layer control signaling comprises the sidelink BSR of the transmitting terminal,
• wherein before transmitting the sidelink resource SR and the sidelink BSR of the transmitting terminal to the scheduling terminal, the method further comprises:
• executing a process of establishing the connection with the scheduling terminal;
• receiving second high-layer control signaling transmitted by the scheduling terminal, wherein the second high-layer control signaling comprises indication information indicating that a connection has been successfully established and fourth transmission resource configuration information, wherein the indication information indicates that the scheduling terminal has successfully established the connection with the transmitting terminal, and
• transmitting the sidelink resource SR and the sidelink BSR of the transmitting terminal to the scheduling terminal comprises:
• after determining that the connection has been successfully established, transmitting the sidelink resource SR and the sidelink BSR of the transmitting terminal to the scheduling terminal according to the fourth transmission resource configuration information,
• wherein the process of establishing the connection with the scheduling terminal comprises:
• receiving third system information trasmitted by the scheduling terminal, wherein the third system information comprises resource configuration information of an access channel;
• transmitting the access channel to the scheduling terminal according to the resource configuration information of the access channel, wherein the access channel comprises an access preamble signal;
• receiving fourth physical control signaling transmitted by the scheduling terminal, wherein the fourth physical control signaling comprises feedback resource configutaion information;
• receiving third high-layer control signaling transmitted by the scheduling terminal according to the feedback resource configuration information, wherein the third high-layer control signaling comprises fifth transmission resource configuration information and a clock regulation instruction;
• regulating a clock of the transmitting terminal according to the clock regulation instruction;
• and
• transmitting fourth high-layer control signaling to the scheduling terminal according to the fifth transmission resource configuration information, wherein the fourth high-layer control signaling comprises a terminal Identity (ID) of the transmitting terminal.

A terminal, wherein the terminal is a scheduling terminal for data transmission via a sidelink and comprises:

• a transmitter, configured to transmit first physical control signaling to a transmitting terminal, the first physical control signaling comprising a first transmission resource for transmitting first system information, wherein
• the transmitter is further configured to transmit the first system information to the transmitting terminal, wherein the first system information comprises sidelink resource pool information,
• wherein the terminal further comprising a receiver, wherein
• the receiver is configured to receive a second physical control signaling transmitted by the transmitting terminal, wherein the second physical control signaling comprises the sidelink resource SR;
• the receiver is further configured to receive first high-layer control signaling transmitted by the transmitting terminal, wherein the first high-layer control signaling comprises the sidelink BSR of the transmitting terminal;
• and
• the transmitter is specifically configured to transmit sidelink resource scheduling grant information to the transmitting terminal according to the sidelink resource SR,
• wherein the terminal further comprising a processor, wherein
• the processor is configured to execute a process of establishing the conncetion with the transmitting terminal;
• the processor is configured to determined that a connection has been successfully established with the transmitting terminal;
• and
• the processor is further configured to transmit second high-layer control signaling to the transmitting terminal, wherein the second high-layer control signaling comprises an Identity (ID) of the transmitting terminal,
• wherein the sidelink resource SR and the sidelink BSR of the transmitting terminal are transmitted after the transmitting terminal receives the second high-layer control signaling comprising the ID of the transmitting terminal,
• wherein
• the transmitter is further configured to transmit third system information to the transmitting terminal, wherein the third system information comprises resource configuration information os an access channel;
• the receiver is further configured to receive the access channel transmitted by the transmitting terminal, the access channel comprising an access preamble signal;
• the processor is further configured to determine a transmission delay with the transmitting terminal according to the access preamble signal;
• the transmitter is further configured to transmit third physical control signaling to the transmitting terminal, wherein the third physical control signaling comprises feedback resource configuration information;
• the transmitter is further configured to trasmit third high-layer control signaling to the transmitting terminal, wherein the third high-layer control signaling comprises third transmission resource configuration and a transmission-delay-based clock regulation instruction;
• the receiver is further configured to receive fourth high-layer control signaling transmitted by the transmitting terminal, wherein the fourth high-layer control signaling comprises the ID of the transmitting terminal;
• and
• the processor is further configured to determine whether the connection has been successfully established with the transmitting terminal;
• wherein the feedback resource configuration information is used for the transmitting terminal to receive the third high-layer control signaling on a feedback resource, and the fourth high-layer control signaling is transmitted on a third transmission resource after the transmitting terminal regulates a clock according to the clock regulation instruction.