Method and apparatus for transmitting data and communication system

1. An apparatus for transmitting data of vehicle communication (V2X) services, configured in a terminal equipment, the apparatus comprising:

a memory that stores a plurality of instructions;

processor circuitry that couples to the memory and that is configured to execute the instructions to:

configure a media access control (MAC) layer of the terminal equipment to generate at least one protocol data unit (PDU) in a way that transmission modes to which service data units (SDU) contained in a PDU correspond are identical;

configure the MAC layer to transmit the PDU to a physical layer of the terminal equipment, and notify, in separate information from the PDU, the transmission mode to which the PDU corresponds to the physical layer; and

set the transmission mode according to received indication information indicating the transmission mode,

wherein the indication information is provided by a network device of an access network via system information or via dedicated radio resource control (RRC) signaling, and the indication information is used to configure the transmission mode for a sidelink Radio Bearer.

2. The apparatus according to claim 1 , wherein,

the transmission mode comprises unicast, or groupcast, or broadcast.

3. The apparatus according to claim 1 , wherein the processor circuitry is further configured to configure an upper layer of the terminal equipment to determine the transmission mode, wherein the upper layer is a V2X layer.

4. The apparatus according to claim 3 , wherein, the processor circuitry is further configured to indicate data packets of the V2X services and a transmission mode to which the data packets of the V2X services correspond.

5. The apparatus according to claim 4 , wherein the processor circuitry is further configured to configure a packet filter of the terminal equipment to map the data packets onto quality of service (QoS) flows; and wherein transmission modes to which data packets in a QoS flow correspond are identical.

6. The apparatus according to claim 4 , wherein the processor circuitry is further configured to configure a service data adaptation protocol (SDAP) layer of the terminal equipment to map the QoS flows or the data packets of the V2X services onto data radio bearers (DRBs); wherein transmission modes to which QoS flows or data packets of the V2X services on a DRB correspond are identical.

7. The apparatus according to claim 4 , wherein the processor circuitry is further configured to configure a packet data convergence protocol (PDCP) layer of the terminal equipment to map the QoS flows or the data packets of the V2X services onto data radio bearers (DRBs);

wherein transmission modes to which QoS flows or data packets of the V2X services on a DRB correspond are identical.

8. The apparatus according to claim 1 , wherein the processor circuitry is further configured to configure an access stratum of the terminal equipment to determine the transmission mode.

9. The apparatus according to claim 3 , wherein the processor circuitry is further configured to notify the transmission modes to a network device.

10. The apparatus according to claim 9 , wherein, the processor circuitry is further configured to notify the transmission modes to the network device via a sidelink UE information radio resource control (RRC) message, or a sidelink buffer status report (BSR), or a scheduling request (SR).

11. The apparatus according to claim 1 , wherein,

the indication information provided by the network device of core network is used to configure transmission modes to which data packets on a sidelink and/or the QoS flows correspond.

12. The apparatus according to claim 1 , wherein, the indication information provided by the network device of the access network is used to configure the transmission modes to which data radio bearers (DRBs) on a sidelink and/or radio link control (RLC) channels and/or logical channels correspond.

13. The apparatus according to claim 1 , wherein, the indication information provided by the network device of the access network contains transmission modes to which scheduled sidelink data correspond.

14. An apparatus for transmitting data of vehicle communication (V2X) services, configured in a network device, the apparatus comprising:

a memory that stores a plurality of instructions;

processor circuitry that couples to the memory and that is configured to execute the instructions to:

generate indication information used for configuring or indicating transmission modes for transmitting data of a terminal equipment, wherein the transmission modes comprise unicast, groupcast, or broadcast; and

transmit the indication information to the terminal equipment from the network device that is a network device of an access network via system information or via dedicated radio resource control (RRC) signaling, and the indication information is used, by the terminal equipment, to configure the transmission mode for a sidelink Radio Bearer,

wherein the terminal equipment generates at least one protocol data unit (PDU) in a way that transmission modes to which service data units (SDU) contained in a PDU correspond are identical in a media access control (MAC) layer and transmits the PDU to a physical layer of the terminal equipment, and notify, in separate information from the PDU, the transmission mode to which the PDU corresponds to the physical layer,

wherein the terminal equipment sets the transmission modes according to received indication information indicating the transmission modes.

15. The apparatus according to claim 14 , wherein,

the indication information is used to configure the transmission mode for a sidelink DRB.

16. A communication system, comprising a network device and a terminal equipment;

wherein the network device comprises a first apparatus for transmitting data of vehicle communication (V2X) services, configured in the network device, the first apparatus comprising:

first processor circuitry configured to:

generate indication information used for indicating transmission modes for transmitting data of a terminal equipment, wherein the transmission modes comprise unicast, groupcast, or broadcast; and

transmit the indication information to the terminal equipment from the network device that is a network device of an access network via system information or via dedicated radio resource control (RRC) signaling, and the indication information is used, by the terminal equipment, to configure the transmission mode for a sidelink Radio Bearer; and

the terminal equipment comprises a second apparatus for transmitting data of V2X services, configured in the terminal equipment, the second apparatus comprising:

second processor circuitry configured to:

configure a media access control (MAC) layer of the terminal equipment to generate at least one protocol data unit (PDU) in a way that transmission modes to which service data units (SDU) contained in a PDU correspond are identical; and

configure the MAC layer to transmit the PDU to a physical layer of the terminal equipment, and notify, in separate information from the PDU, the transmission mode to which the PDU corresponds to the physical layer; and

set the transmission mode according to received indication information indicating the transmission mode.