Method of an uplink HARQ operation at an expiry of time alignment timer
AssigneeLG Electronics Inc.
InventorsSung Duck Chun, Seung June Yi, Sung Jun Park, Young Dae Lee
Life of this patent
Estimating the term…
Abstract
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.
Claims20
A method of performing a Hybrid Automatic Repeat reQuest (HARQ) operation in a wireless communication system, the method comprising:
- 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,
- wherein 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,
- wherein the stored data unit is a Medium Access Control (MAC) Protocol Data Unit (PDU), and
- wherein the TAT is started when a time advance command (TAC) is received from a network.
A user equipment (UE) using a Hybrid Automatic Repeat reQuest (HARQ) operation in a wireless communication system, the UE comprising:
- a controller configured to:
- store a data unit into at least one of a HARQ buffer among all HARQ buffers, and
- flush all HARQ buffers when a timer expires,
- wherein the timer is a time alignment timer (TAT) which is used to control how long the UE is considered to have an uplink time that is aligned,
- wherein the stored data unit is a Medium Access Control (MAC) Protocol Data Unit (PDU), and
- wherein the TAT is started when a time advance command (TAC) is received from a network.
Dependencies are inferred from the claim text.