Low latency uplink communication

A method of wireless communication by a user equipment (UE), comprising:

• identifying radio link control (RLC) protocol data units (PDUs) to send to a receiver, each RLC PDU being associated with a logical channel and comprising a sequence number (SN) of the logical channel generated by an RLC protocol entity of the UE;
• determining whether use of an integrity protection code is configured for a first logical channel, the first logical channel comprising a plurality of RLC PDUs in the identified RLC PDUs, including a first start segment and a first end segment associated with a first SN;
• arranging, based on a result of the determining, a first set of RLC PDUs of the identified RLC PDUs in a first media access control (MAC) transport block (TB) wherein the first end segment is placed after a second RLC PDU of the first logical channel having a second SN that is larger than the first SN;
• and
• sending the first MAC transport block to the receiver.

A user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to:
• identify radio link control (RLC) protocol data units (PDUs) to send to a receiver, each RLC PDU being associated with a logical channel and comprising a sequence number of the logical channel generated by an RLC protocol entity of the UE;
• determine whether use of an integrity protection code is configured for a first logical channel, the first logical channel comprising a plurality of RLC PDUs in the identified RLC PDUs, including a first start segment and a first end segment associated with a first sequence number;
• arrange, based on a result of the determining, a first set of RLC PDUs of the identified RLC PDUs in a first media access control (MAC) transport block (TB), wherein the first start segment is placed at the end of the first MAC TB;
• arrange, based on a result of the determining, a second set of RLC PDUs of the identified RLC PDUs in a second MAC TB, wherein the first end segment is placed at the beginning of the second MAC TB when the second MAC TB is in a different transmission time interval than the first MAC TB or the first end segment is placed at the end of the second MAC TB when the second MAC TB is in a same transmission time interval as the first MAC TB;
• and
• send the first MAC TB and the second MAC TB to the receiver.

A user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to:
• identify radio link control (RLC) protocol data units (PDUs) to send to a receiver, each RLC PDU being associated with a logical channel and comprising a sequence number (SN) of the logical channel generated by an RLC protocol entity of the UE;
• determine whether use of an integrity protection code is configured for a first logical channel, the first logical channel comprising a plurality of RLC PDUs in the identified RLC PDUs, including a first start segment and a first end segment associated with a first SN;
• arrange, based on a result of the determining, a first set of RLC PDUs of the identified RLC PDUs in a first transport block (TB) wherein the first end segment is placed after a second RLC PDU of the first logical channel having a second SN that is larger than the first SN;
• and
• send the first TB to the receiver.