METHOD OF AN UPLINK HARQ OPERATION AT AN EXPIRY OF TIME ALIGNMENT TIMER

• US 20090204862A1
• Filed: 01/30/2009
• Published: 08/13/2009
• Est. Priority Date: 02/01/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung-June, Park, Sung-Jun, Lee, Young-Dae, Chun, Sung-Duck
• Granted Patent: US 8,312,336 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1835 Buffer management
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Disclosed is the radio (wireless) communication system providing a radio communication service and the terminal, and more particularly, to a method of an uplink HARQ (Hybrid Automatic Repeat reQuest) operation at an expiry of time alignment timer in an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from the Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system.

Claims

1. A method of processing data for a HARQ (hybrid automatic repeat request) operation in a wireless communication system, the method comprising:

receiving an uplink Grant from a network;

generating a data unit based on the received uplink grant;

storing the generated data unit into a plurality of buffers; and

flushing the stored data unit in the plurality of buffers when a timer expires.

2. The method of claim 1, wherein the timer is a time alignment timer (TAT).

3. The method of claim 1, wherein the uplink grant is received on a PDCCH (Physical Downlink Control Channel).

4. The method of claim 1, wherein the uplink grant includes at least one of uplink scheduling information, a C-RNTI (Cell-Radio Network Temporary Identifier), and a Semi-persistent Scheduling C-RNTI.

5. The method of claim 1, wherein the data unit is MAC PDU (Medium Access Control Protocol Data Unit).

6. The method of claim 1, wherein the plurality of buffers is all uplink HARQ buffers.

7. A method of processing data for a HARQ (hybrid automatic repeat request) operation in a wireless communication system, the method comprising:

receiving an uplink Grant from a network;

generating a data unit based on the received uplink grant;

storing the generated data unit into a plurality of buffers; and

flushing the stored data in the plurality of buffers when the timer is not running.

8. The method of claim 7, wherein the timer is a time alignment timer (TAT).

9. The method of claim 7, wherein the uplink grant is received on a PDCCH (Physical Downlink Control Channel).

10. The method of claim 7, wherein the uplink grant includes at least one of uplink scheduling information, a C-RNTI (Cell-Radio Network Temporary Identifier), and a Semi-persistent Scheduling C-RNTI.

11. The method of claim 7, wherein the data unit is MAC PDU (Medium Access Control Protocol Data Unit).

12. The method of claim 7, wherein the plurality of buffers is all uplink HARQ buffers.

13. A method of processing data for a HARQ (hybrid automatic repeat request) operation in a wireless communication system, the method comprising:

receiving an uplink Grant from a network;

generating a data unit based on the received uplink grant;

storing the generated data unit into a plurality of buffers;

determining whether or not a timer is running;

determining whether a command for starting the timer is received; and

flushing the stored data in the plurality of buffers when it is determined that the timer is not running and the command is received.

14. The method of claim 13, wherein the command is a timing advance command (TAC).