Methods and apparatuses for enhanced delay status reporting in mobile communications

An apparatus, comprising:

• a transceiver which, during operation, wirelessly communicates with a network node;
• and
• a processor communicatively coupled to the transceiver such that, during operation, the processor performs operations comprising:
• receiving, via the transceiver, a configuration from the network node, wherein the configuration comprises a remaining time threshold for triggering a delay status reporting (DSR) procedure for one or more logical channels within a logical channel group (LCG);
• triggering the DSR procedure based on the remaining time threshold;
• and
• transmitting, via the transceiver, a DSR medium access control (MAC) control element (CE) to the network node responsive to triggering the DSR procedure, wherein the DSR MAC CE comprises a plurality of entries of delay status information for the LCG, each of the plurality of entries comprising a pair of a remaining time field and a buffer size field, and an extension (EXT) field indicative of whether an additional pair of the remaining time field and the buffer size field is present for the LCG in a subsequent entry.