Method and apparatus for handling uplink bearer split configuration in multi-connectivity system

A mobile terminal for handling an uplink (UL) bearer split configuration, comprising:

• a transceiver;
• at least one processor;
• and
• a memory communicatively coupled to the at least one processor, wherein the memory is configured to store processor-executable instructions, which, when executed, cause the at least one processor to:
• identify first UL data of a packet data convergence protocol (PDCP) layer;
• control the transceiver to transmit first data of the first UL data to a primary radio link control (RLC) entity for a first time period, and to transmit second data of the first UL data to a secondary RLC entity for a second time period;
• identify at least one first network parameter of a first UL path associated with the primary RLC entity for the first time period, and identify at least one second network parameter of a second UL path associated with the secondary RLC entity for the second time period;
• irrespective of reception of an UL grant for second UL data of the PDCP layer, determine a split factor for splitting the second UL data between the primary RLC entity and the secondary RLC entity based on the at least one first network parameter and the at least one second network parameter;
• and
• control the transceiver to transmit the second UL data to the primary RLC entity and the secondary RLC entity for a third time period based on the split factor.

A non-transitory computer readable medium comprising instructions stored thereon which, when processed by at least one processor, cause a mobile terminal to perform a method comprising:

• identifying first uplink (UL) data of a packet data convergence protocol (PDCP) layer;
• transmitting first data of the first UL data to a primary radio link control (RLC) entity for a first time period, and transmitting second data of the first UL data to a secondary RLC entity for a second time period;
• identifying at least one first network parameter of a first UL path associated with the primary RLC entity for the first time period, and identifying at least one second network parameter of a second UL path associated with the secondary RLC entity for the second time period;
• irrespective of reception of an UL grant for second UL data of the PDCP layer, determining a split factor for splitting the second UL data between the primary RLC entity and the secondary RLC entity based on the at least one first network parameter and the at least one second network parameter;
• and
• transmitting the second UL data to the primary RLC entity and the secondary RLC entity for a third time period based on the split factor.