System for performing split bearer operation using packet data convergence protocol (PDCP)

A terminal device comprising:

• a memory configured to store computer-executable instructions;
• and
• one or more processors in communication with the memory and configured to execute the computer-executable instructions to:
• submit, on condition that an amount of data to be sent of a first split bearer is less than a preset threshold, packet data convergence protocol (PDCP) data of the first split bearer to a first radio link control (RLC), wherein the first split bearer corresponds to a first PDCP, the PDCP data of the first split bearer comprises data in the first PDCP, the first PDCP is associated with, the first RLC and a second RLC, the first RLC corresponds to a first cell group, and the second RLC corresponds to a second cell group,
• wherein executing the computer-executable instructions further causes the one or more processors to:
• on condition that the amount of data to be sent of the first split bearer is less than the preset threshold, receive an uplink grant before submitting the PDCP data of the first split bearer to the first RLC, wherein the uplink grant is configured for transmitting the data to be sent of the first split bearer;
• wherein executing the computer-executable instructions further causes the one ore more processors to:
• before receiving the uplink grant, submitting a part of the PDCP data of the first split bearer to at least one of the first RLC or the second RLC.

A non-transitory computer-readable storage medium, having stored thereon computer-executable instructions that, when executed by a processor of a terminal device, cause the processor to perform a method for data processing, the method comprising:

• submitting, on condition that an amount of data to be sent of a first split bearer is less than a preset threshold, packet data convergence protocol (PDCP) data of the first split bearer to a first radio link control (RLC), wherein the first split bearer corresponds to a first PDCP, the PDCP data of the first split bearer comprises data in the first PDCP, the first PDCP is associated with the first RLC and a second RLC, the first RLC corresponds to a first cell group, and the second RLC corresponds to a second cell group,
• wherein before submitting, on condition that the amount of data to be sent of the first split bearer is less than the preset threshold, the PDCP data of the first split bearer to the first RLC, the method further comprises:
• receiving an uplink grant, wherein the uplink grant is configured for transmitting the data to be sent of the first split bearer,
• wherein before receiving the uplink grant, the method further comprises:
• submitting a part of the PDCP data of the first split bearer to at least one of the first RLC or the second RLC.

A network device, comprising:

• a memory configured to store computer-executable instructions;
• and
• one or more processors in communication with the memory and configured to execute the computer-executable instructions to:
• send an uplink grant, the uplink grant being configured for a terminal device to transmit data to be sent of a first split bearer, so that the terminal device submits, on condition that an amount of data to be sent of the first split bearer is less than a preset threshold, packet data convergence protocol (PDCP) data of the first split bearer to a first radio link control (RLC),
• wherein the first split bearer corresponds to a first PDCP, the PDCP data of the first split bearer comprises data in the first PDCP, the first PDCP is associated with the first RLC and a second RLC, the first RLC corresponds to a first cell group, and the second RLC corresponds to a second cell group,
• wherein before reception of the uplink grant by the terminal device, a part of the PDCP data of the first split bearer is submitted by the terminal device to at least one of the first RLC or the second RLC.