Birch, Stewart, Kolasch & Birch, LLP
Method of an uplink HARQ operation at an expiry of time alignment timer
A method of processing data for a Hybrid Automatic Repeat reQuest (HARQ) operation in a wireless communication system. The method includes receiving a timing alignment command (TAC) and one or more uplink grants from a network; and generating a data unit. The one or more uplink grants are used for transmitting the generated data unit to the network. The method further includes starting a time alignment timer (TAT) upon receiving the TAC. The TAT is used to control how long a User Equipment (UE) is considered to have an uplink time that is aligned. The method further includes when the TAT expires, clearing the one or more uplink grants.
LG Electronics Inc.
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Young Dae Seung June Sung Duck Sung Jun
Lee Yi Chun Park