Network Node and Methods Therein for Packet Data Convergence Protocol (PDCP) Reordering

摘要

Embodiments include methods for handling data units in a communication protocol layer (e.g., PDCP) of a network node for a wireless communications network. Such methods include receiving, from a lower protocol layer, one or more first data units with corresponding first sequence numbers. Such methods include, upon expiration of a first timer, forwarding the first data units to a higher protocol layer without receiving one or more second data units, from the lower protocol layer, with corresponding second sequence numbers that are lower than the first sequence numbers. Such methods include forwarding, to the higher protocol layer, any of the second data units that were received from the lower protocol layer during a second time period after expiration of the first timer. Other embodiments include network nodes (e.g., base stations, UEs) configured to perform such methods, as well as computer-readable media containing instructions that embody such methods.