Managing subpacket transmission and reception for advanced interactive services

A data transmission apparatus, comprising:

• processing circuitry configured to:
• receive access stratum context information transmitted by an access and mobility management function (AMF), the access stratum context information indicating that different types of service packets of an interactive service are transmitted in different general packet radio service tunnel protocol user plane (GTP-U) tunnels, and are transmitted by a same data radio bearer (DRB);
• in response to a determination that a data packet transmitted by a user-plane functional entity through a first GTP-U tunnel is a fragmented subpacket of a first service packet of the interactive service, determine a state of transmission of the fragmented subpacket according to the access stratum context information during transmission of the fragmented subpacket to a user equipment on the DRB;
• and
• in response to a determination that the transmission of the fragmented subpacket of the first service packet of the interactive service to the user equipment has failed:
• stop transmission of remaining fragmented subpackets of the first service packet in the first GTP-U tunnel of the different GTP-U tunnels to the user equipment, and
• stop transmission of fragmented subpackets of a second service packet of a different type of interactive service in a second GTP-U tunnel of the different GTP-U tunnels to the user equipment, restoration of content of the second service packet being based on restoration of content of the first service packet.

A non-transitory computer-readable storage medium storing computer-readable instructions thereon, which, when executed by processing circuitry, cause the processing circuitry to perform a data transmission method, comprising:

• receiving access stratum context information transmitted by an access and mobility management function (AMF), the access stratum context information indicating that different types of service packets of an interactive service are transmitted in different general packet radio service tunnel protocol user plane (GTP-U) tunnels, and are transmitted by a same data radio bearer (DRB);
• in response to a determination that a data packet transmitted by a user-plane functional entity through a first GTP-U tunnel is a fragmented subpacket of a first service packet of the interactive service, determining a state of transmission of the fragmented subpacket according to the access stratum context information during transmission of the fragmented subpacket to a user equipment on the DRB;
• and
• in response to a determination that the transmission of the fragmented subpacket of the first service packet of the interactive service to the user equipment has failed:
• stopping transmission of remaining fragmented subpackets of the first service packet in the first GTP-U tunnel of the different GTP-U tunnels to the user equipment, and
• stopping transmission of fragmented subpackets of a second service packet of a different type of the interactive service in a second GTP-U tunnel of the different GTP-U tunnels to the user equipment, restoration of content of the second service packet being based on restoration of content of the first service packet.