Data transmission method, mobility management entity, and mobile terminal

An apparatus for use in a mobility management entity, the apparatus comprising:

• a processor;
• a storage medium coupled to the processor, the storage medium comprising executable instructions that when executed by the processor, cause the mobility management entity to:
• receive, via a first non-access stratum (NAS) message, a small data transmission parameter from a user equipment, wherein the small data transmission parameter comprises an indication that the user equipment supports small data transmission,
• determine a small data transmission policy based on the indication, wherein the small data transmission policy indicates that small data transmission is supported, and
• for uplink data transmission:
• receive a data container that encapsulates uplink data and a bearer identity via a second NAS message and is sent from the user equipment,
• determine a tunnel endpoint identifier (TEID) of the network side device and an IP address of the network side device based on the bearer identity,
• construct a general packet radio system tunneling protocol-user plane (GTP-U) packet using the uplink data, and
• transmit the GTP-U packet to the network side device corresponding to the TEID of the network side device and the IP address of the network side device.

A method performed by a mobility management entity, comprising:

• receiving, through a first non-access stratum (NAS) message, a small data transmission parameter from a user equipment, wherein the small data transmission parameter comprises an indication that the user equipment supports small data transmission;
• determining a small data transmission policy based on the indication, wherein the small data transmission policy indicates that small data transmission is supported;
• and
• for uplink data transmission:
• receiving a data container that encapsulates uplink data and a bearer identity via a second NAS message and is sent from the user equipment;
• determining a tunnel endpoint identifier (TEID) of the network side device and an IP address of the network side device based on the bearer identity;
• constructing a general packet radio system tunneling protocol-user plane (GTP-U) packet using the uplink data;
• and
• transmitting the GTP-U packet to the network side device corresponding to the TEID and the IP address.

A non-transitory computer-readable storage medium comprising instructions that, when executed by a computer, cause the computer to:

• receive, through a first non-access stratum (NAS) message, a small data transmission parameter from a user equipment, wherein the small data transmission parameter comprises an indication that the user equipment supports small data transmission;
• determine a small data transmission policy based on the indication, wherein the small data transmission policy indicates that small data transmission is supported;
• and
• for uplink data transmission:
• receive a data container that encapsulates uplink data and a bearer identity via a second NAS message and is sent from the user equipment;
• determine a tunnel endpoint identifier (TEID) of the network side device and an IP address of the network side device based on the bearer identity;
• construct a general packet radio system tunneling protocol-user plane (GTP-U) packet using the uplink data;
• and
• transmit the GTP-U packet to the network side device corresponding to the TEID and the IP address.

A communication system, comprising a mobility management entity and a serving gateway, wherein:

• the mobility management entity is configured to:
• receive, through a first non-access stratum (NAS) message, a small data transmission parameter from a user equipment, wherein the small data transmission parameter comprises an indication that the user equipment supports small data transmission;
• determine a small data transmission policy based on the indication, wherein the small data transmission policy indicates small data transmission is supported;
• and
• for uplink data transmission:
• receive a data container that encapsulates uplink data and a bearer identity via a second NAS message and is sent from the user equipment;
• determine a tunnel endpoint identifier (TEID) of the serving gateway and an IP address of the serving gateway based on the bearer identity;
• construct a general packet radio system tunneling protocol-user plane (GTP-U) packet using the uplink data;
• and
• transmit the GTP-U packet to the serving gateway corresponding to the TEID of the serving gateway and the IP address of the serving gateway;
• the serving gateway is configured to:
• for uplink data transmission:
• receive the GTP-U packet.