Patent ID: 8711834
Filing Date: 2014-04-29
Classification: H04L,H04W

Abstract:
1. A method for Hyper Frame Number (HFN) synchronization in a wireless communication system, comprising: if single sided re-establishment of a Radio Link Control (RLC) entity occurs during a pending RLC reset procedure, aborting the pending RLC reset procedure and performing the single sided re-establishment of the RLC entity; restarting the pending RLC reset procedure and toggling a 1-bit Reset Sequence Number (RSN) value; transmitting a RESET Packet Data Unit (PDU) with the toggled RSN value to a receiver; receiving a RESET ACKnowledgement (ACK) PDU for the RESET PDU with the toggled RSN value from the receiver; checking the toggled RSN value included in the received RESET ACK PDU; and updating an HFN value according to the toggled RSN value and an HFN value included in the received RESET ACK PDU, wherein toggling the 1-bit RSN value comprises: toggling the RSN value to ‘1’ if the RSN value is ‘0’ before the single sided re-establishment; and toggling the RSN value to ‘0’ if the RSN value is ‘1’ before the single sided re-establishment.