Data transmission and apparatus

An apparatus, comprising:

• a processor;
• a non-transitory storage medium comprising executable instructions which, when executed by the processor, cause the apparatus to:
• receive a media access control (MAC) packet data unit (PDU), the MAC PDU comprising a MAC header followed by a plurality of MAC payloads, wherein the MAC header comprises a plurality of contiguous subheaders, each subheader comprises a respective identification information of each receiving device in a plurality of receiving devices, wherein a first receiving device is comprised in the plurality of receiving devices, the apparatus is comprised in the first receiving device, each MAC payload of the plurality of MAC payloads corresponds to a respective receiving device of the plurality of receiving devices, and each subheader of the plurality of contiguous subheaders corresponds to a respective MAC payload of the plurality of MAC payloads, and wherein the plurality of MAC payloads are contiguous without any intervening MAC header between adjacent MAC payloads, each MAC payload of the plurality of MAC payloads comprises at least one kind of a MAC control element (CE) or a MAC service data unit (SDU), and a subheader corresponding to a MAC CE has a different format than a subheader corresponding to a MAC SDU;
• and
• obtain, from the received MAC PDU, at least one MAC payload corresponding to the first receiving device, wherein identification information in the received MAC PDU that corresponds to the at least one MAC payload identifies the first receiving device among the plurality of receiving devices.

A non-transitory computer-readable storage medium comprising instructions which, when executed by a first receiving device, cause the first receiving device to:

• receive a media access control (MAC) packet data unit (PDU), the MAC PDU comprising a MAC header followed by a plurality of MAC payloads, wherein the MAC header comprises a plurality of contiguous subheaders, each subheader comprises a respective identification information of each receiving device in a plurality of receiving devices, wherein the first receiving device is comprised in the plurality of receiving devices, each MAC payload of the plurality of MAC payloads corresponds to a respective receiving device of the plurality of receiving devices, and each subheader of the plurality of contiguous subheaders corresponds to a respective MAC payload of the plurality of MAC payloads, and wherein the plurality of MAC payloads are contiguous without any intervening MAC header between adjacent MAC payloads, each MAC payload of the plurality of MAC payloads comprises at least one kind of a MAC control element (CE) or a MAC service data unit (SDU), and a subheader corresponding to a MAC CE has a different format than a subheader corresponding to a MAC SDU;
• and
• obtain, from the received MAC PDU, at least one MAC payload corresponding to the first receiving device, wherein identification information in the received MAC PDU that corresponds to the at least one MAC payload identifies the first receiving device among the plurality of receiving devices.