Determination of maximum number of uplink retransmissions

1. A method performed by a wireless device adapted to operate in a wireless communication system, the method comprising:

receiving, from a network, information related to a first retransmission number for a first logical channel and a second retransmission number for a second logical channel;

receiving, from the network, information related to a first timer value for the first logical channel and a second timer value for the second logical channel;

determining a retransmission number of a data unit based on the first retransmission number and the second retransmission number;

determining a retransmission timer value based on the first timer value and the second timer value;

triggering a scheduling request (SR) to acquire an uplink grant;

transmitting, to the network, a buffer status report based on the uplink grant,

wherein the buffer status report includes i) a buffer size for one or more of the first logical channel or the second logical channel, ii) information related to the retransmission number of the data unit, and iii) information related to a maximum number of grants for retransmission;

receiving, from the network, one or more grants which are created by a base station based on the retransmission number of the data unit and the maximum number of grants for retransmission;

performing logical channel prioritization to construct the data unit;

performing an initial transmission of the data unit;

starting a timer; and

performing retransmission of the data unit up to the maximum retransmission number until the timer expires based on the retransmission timer value.

2. The method of claim 1 , wherein the retransmission number of the data unit is a highest number among the first retransmission number and the second retransmission number.

3. The method of claim 1 ,

wherein the retransmission timer value is a highest timer value among the first timer value and the second timer value.

4. The method of claim 1 , wherein the buffer status report further includes information related to the retransmission timer value.

5. The method of claim 1 , wherein the first logical channel belongs to a first logical channel group, and

wherein the second logical channel belongs to a second logical channel group.

6. The method of claim 1 , wherein the data unit includes a media access control (MAC) protocol data unit (PDU), and

wherein the MAC PDU includes one or more MAC service data units (SDUs) from the first logical channel and the second logical channel.

7. The method of claim 1 , wherein the data unit is constructed based on the one or more grants.

8. The method of claim 1 , wherein the wireless device is in communication with at least one of a mobile device, a network, and/or autonomous vehicles other than the wireless device.

9. A wireless device adapted to operate in a wireless communication system, comprising:

at least one transceiver;

at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

receiving, from a network, information related to a first retransmission number for a first logical channel and a second retransmission number for a second logical channel;

receiving, from the network, information related to a first timer value for the first logical channel and a second timer value for the second logical channel;

determining a retransmission number of a data unit based on the first retransmission number and the second retransmission number;

determining a retransmission timer value based on the first timer value and the second timer value;

triggering a scheduling request (SR) to acquire an uplink grant;

transmitting, to the network, a buffer status report based on the uplink grant,

wherein the buffer status report includes i) a buffer size for one or more of the first logical channel or the second logical channel, ii) information related to the retransmission number of the data unit, and iii) information related to a maximum number of grants for retransmission;

receiving, from the network, one or more grants which are created by a base station based on the retransmission number of the data unit and the maximum number of grants for retransmission;

performing logical channel prioritization to construct the data unit;

performing an initial transmission of the data unit;

starting a timer; and

performing retransmission of the data unit up to the maximum retransmission number until the timer expires based on the retransmission timer value.