LTE: Why HARQ re-ordering is required in RLC UM mode ???

Question

In dual connectivity , Does PDCP re-orders the PDU?

Answer 1

Hi hinmani ,

HARQ Reordering is required because sometimes the chunks transmitted earlier from transmitter may arrive late at the receiver due to HARQ re-transmission. In this case you have to reorder the incoming chunks into proper order for reassembly.

Note: HARQ re-ordering is required in all RLC mode , because even in RLC UM mode MAC will use HARQ to process.

Comments

thank you