Network card device and data transmission system

A data transmission system, comprising:

• a host, configured to send data, a descriptor, and a trigger instruction;
• and
• at least one network card device, the at least one network card device comprises:
• a storage module, the storage module comprises a first descriptor storage area and a first data storage area;
• a descriptor queue address register, configured to store a base address of the first descriptor storage area;
• a compute express link hard core module, configured to receive data and a descriptor sent by a host through a compute express link memory protocol, receive a trigger instruction sent by the host through a compute express link enumeration configuration protocol, transmit the data sent by the host to the first data storage area, transmit the descriptor sent by the host to the first descriptor storage area, and transmit the trigger instruction sent by the host to a network data processing module;
• and
• the network data processing module, configured to acquire the base address from the descriptor queue address register in response to the trigger instruction being received, read a target descriptor in the first descriptor storage area based on the base address and the trigger instruction, read target data corresponding to the target descriptor from the first data storage area, and output the target data to a network.