Method for determining transmission mode in sidelink, terminal apparatus, and network apparatus

A method for determining a transmission mode of a sidelink, comprising:

• receiving a first message sent by a first terminal device, wherein the first message comprises group identifier information of a terminal device group where the first terminal device is located, or identification information of a second terminal device, wherein the second terminal device is a terminal device which performs unicast communication with the first terminal device;
• determining a first transmission mode in a plurality of transmission modes according to the first message;
• and
• sending first configuration information to the first terminal device, wherein the first configuration information is used for indicating the first terminal device to adopt the first transmission mode to perform the sidelink communication with another terminal device,
• wherein the first configuration information comprises:
• type information of unicast communication, multicast communication or broadcast communication, Quality of Service (QoS) attribute information, and the group identification information of the terminal device group where the first terminal is located,
• wherein the transmission mode comprises:
• mode 1 or mode 2, wherein the mode 1 is that the network device allocates transmission resources for the first terminal device, and the mode 2 is that the terminal device selects the transmission resources randomly or by sensing.

A terminal device, comprising:

• a processor and a transceiver, wherein
• the transceiver is configured to send a first message to a network device, wherein the first message comprises group identifier information of a terminal device group where the terminal device is located, or identification information of a second terminal device, wherein the second terminal device is a terminal device which performs unicast communication with the first terminal device, and receive first configuration information sent by the network device, wherein the first configuration information is used for indicating a first transmission mode;
• and
• the processor is configured to determine the first transmission mode in a plurality of transmission modes based on the first configuration information;
• wherein the transceiver is further configured to adopt the first transmission mode to perform a sidelink communication with another terminal device,
• wherein the first configuration information comprises:
• type information of unicast communication, multicast communication or broadcast communication, Quality of Service (QoS) attribute information, and the group identification information of the terminal device group where the first terminal is located,
• wherein the transmission mode comprises:
• mode 1 or mode 2, wherein the mode 1 is that the network device allocates transmission resources for the first terminal device, and the mode 2 is that the terminal device selects the transmission resources randomly or by sensing.

A network device, comprising:

• a processor and a transceiver, wherein
• the transceiver is configured to receive a first message sent by a first terminal device, wherein the first message comprises group identifier information of a terminal device group where the first terminal device is located, or identification information of a second terminal device, wherein the second terminal device is a terminal device which performs unicast communication with the first terminal device;
• and
• the processor is configured to determine a first transmission mode in a plurality of transmission modes according to the first message;
• wherein the transceiver is configured to send first configuration information to the first terminal device, wherein the first configuration information is used for indicating the first terminal device to adopt the first transmission mode to perform a sidelink communication with another terminal device,
• wherein the first configuration information comprises:
• type information of unicast communication, multicast communication or broadcast communication, Quality of Service (QoS) attribute information, and the group identification information of the terminal device group where the first terminal is located,
• wherein the transmission mode comprises:
• mode 1 or mode 2, wherein the mode 1 is that the network device allocates transmission resources for the first terminal device, and the mode 2 is that the terminal device selects the transmission resources randomly or by sensing.