Method and apparatus of supporting burst arrival time (bat) reporting

A processor for wireless communication, comprising:

• at least one controller coupled with at least one memory and configured to cause the processor to:
• receive a request of a burst arrival time (BAT) of a quality of service (QoS) flow from a network side;
• determine a BAT of the QoS flow, wherein the BAT of the QoS flow is a time value relative to a boundary of a system frame number (SFN);
• and
• transmit the determined BAT of the QoS flow to the network side.

A radio access network (RAN) node for wireless communication, comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the RAN node to:
• receive a first burst arrival time (BAT) of a quality of service (QoS) flow used in a first RAN node;
• and
• determine a second BAT of the QoS flow used in a second RAN node according to the first BAT and a system frame number (SFN) time difference between the first RAN node and the second RAN node,
• wherein each BAT of the QoS flow is a time value relative to a boundary of an SFN, and wherein the RAN node is the first RAN node or the second RAN node.

A method performed by a user equipment (UE), the method comprising:

• receiving a request of a burst arrival time (BAT) of a quality of service (QoS) flow from a network side;
• determining a BAT of the QoS flow, wherein the BAT of the QoS flow is a time value relative to a boundary of a system frame number (SFN);
• and
• transmitting the determined BAT of the QoS flow to the network side.