Birch, Stewart, Kolasch & Birch, LLP
Method of an uplink HARQ operation at an expiry of time alignment timer
A method of performing a Hybrid Automatic Repeat reQuest (HARQ) operation in a wireless communication system. The method according to one embodiment includes storing a data unit into at least one of a HARQ buffer among all HARQ buffers; and flushing all HARQ buffers when a timer expires. The timer is a time alignment timer (TAT) which is used to control how long a User Equipment (UE) is considered to have an uplink time that is aligned. The stored data unit is a Medium Access Control (MAC) Protocol Data Unit (PDU). The TAT is started when a time advance command (TAC) is received from a network.
LG ELECTRONICS INC.
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Sung Duck Seung June Young Dae Sung Jun
Chun Yi Lee Park