Patent ID: 7944944
Filing Date: 2011-05-17
Classification: H04L,H04W

Abstract:
1. A method to reduce the chance of losing hyper frame number (HFN) synchronization during data block transmission between a sender and a receiver in a wireless communication system, wherein data blocks may contain a plurality of fields, wherein the method comprising: at the receiver: receiving a data block from the sender while the data transmission operation is in an unacknowledged mode; determining a condition of a particular field of the plurality of fields of the data block; and ignoring the data block when the condition of the particular field is one of a plurality of abnormal conditions; wherein ignoring the data block includes treating the data block as if it has never been received, instead of treating the data block as missing and discarding the data block as well as the service data units with segments in the data block when maintaining a HFN.