Communications method and apparatus

A communications device, comprising:

• at least one processor, and
• one or more non-transitory compute readable memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to operate as a first network device or as an apparatus included in the first network device, the programming instructions including instructions for:
• determining configuration information of a default data radio bearer (DRB) of a first link, wherein the first link is a direct wireless communications link between a first terminal device and another terminal device, wherein the first terminal device is a transmit end of a first vehicle-to-everything (V2X) data packet, and wherein the configuration information of the default DRB of the first link comprises V2X data packet parameter information corresponding to the default DRB of the first link, wherein the parameter information comprises a type of communication;
• and
• sending the configuration information of the default DRB of the first link to the first terminal device;
• wherein the configuration information of the default DRB of the first link comprises first indication information, and wherein the first indication information indicates that the configuration information is the configuration information of the default DRB of the first link.

A communications system, wherein the system comprises a first terminal device and a first network device:

• wherein the first network device is configured to:
• determine configuration information of a default data radio bearer (DRB) of a first link, wherein the first link is a direct wireless communications link between a first terminal device and another terminal device, and wherein the first terminal device is a transmit end of a first vehicle-to-everything (V2X) data packet;
• and
• send the configuration information of the default DRB of the first link to the first terminal device, wherein the configuration information of the default DRB of the first link comprises first indication information, and the first indication information is used to indicate that the configuration information is the configuration information of the default DRB of the first link, and wherein the configuration information of the default DRB of the first link comprises V2X data packet parameter information corresponding to the default DRB of the first link, wherein the parameter information comprises a type of communication;
• and
• wherein the first terminal device is configured to:
• obtain configuration information of the default DRB of the first link;
• and
• map a first V2X data packet that meets a preset condition to the default DRB of the first link, wherein the preset condition being met comprises the first terminal device not storing a DRB of the first link that corresponds to the first V2X data packet.