Communication method, terminal device, and access network device

A terminal device, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
• when determining that a number of logical channel groups (LCGs) comprise to-be-reported uplink buffer data is more than one, determine whether a current uplink resource is sufficient to report amounts of the to-be-reported uplink buffer data which belong to the more than one LCGs;
• and
• when the current uplink resource is insufficient to report the amounts of the to-be-reported uplink buffer data which belong to the more than one LCGs, if a current uplink resource quantity can accommodate only one byte, determine a first buffer status report (BSR) format as a target BSR format;
• or if the current uplink resource can accommodate more than one byte, determine a second BSR format as the target BSR format, the current uplink resource is for BSR transmission;
• and
• send a truncated BSR to an access network device using the target BSR format, wherein the truncated BSR comprises amounts of the to-be-reported uplink buffer data which belong to some of the more than one LCGs, wherein
• both the first BSR format and the second BSR format are truncated BSR formats, the truncated BSR format is a format used by the terminal device to send the truncated BSR, and the truncated BSR is used to report the amounts of the to-be-reported uplink buffer data which belong to some of the more than one LCGs.

An access network device, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
• receive a buffer status report (BSR) sent by a terminal device using a target BSR format, wherein
• when a current uplink resource is insufficient to report amounts of to-be-reported uplink buffer data which belong to more than one logical channel groups (LCGs), if a current uplink resource quantity can accommodate only one byte, the target BSR format is a first BSR format;
• or if the current uplink resource can accommodate more than one byte, the target BSR format is a second BSR format, the current uplink resource is for BSR transmission;
• and
• both the first BSR format and the second BSR format are truncated BSR formats, the truncated BSR format is a format used by the terminal device to send a truncated BSR, and the truncated BSR is used to report the amounts of the to-be-reported uplink buffer data which belong to some of the more than one LCGs.