TRANSMISSION CONTROL METHOD FOR HARQ IN MOBILE COMMUNICATION SYSTEM

• US 20100169733A1
• Filed: 12/30/2009
• Published: 07/01/2010
• Est. Priority Date: 12/31/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Soeng Hun, LIESHOUT, Gert-Jan Van
• Granted Patent: US 9,755,787 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: G06F 11/1625 in communications, e.g. transmission, interfaces
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 1/1896 ARQ related signaling

Abstract

A transmission control method for HARQ is provided for improving HARQ performance in a mobile communication system. The transmission control method for Hybrid Automatic Repeat reQuest (HARQ) in a mobile communication system according to the present invention includes receiving an downlink resource assignment message; determining whether configured downlink assignment has been indicated to an HARQ entity since a previously received downlink assignment for a User Equipment'"'"'s (UE'"'"'s) Cell-Radio Network Temporary Identifier (C-RNTI) for the same HARQ process; maintaining, if the configured downlink assignment has not been indicated to the HARQ entity, the HARQ process; and processing, if the configured downlink assignment has been indicated to the HARQ entity, the downlink resource assignment message as a resource assignment message for initial transmission.

Claims

1. A transmission control method for Hybrid Automatic Repeat reQuest (HARQ) in a mobile communication system, the method comprising:

receiving a downlink resource assignment on a downlink control channel;

determining whether the received downlink resource assignment is for a User Equipment'"'"'s (UE'"'"'s) Cell-Radio Network Temporary Identifier (C-RNTI) and a previous downlink resource assignment indicated to an HARQ entity of a same HARQ process was a configured downlink assignment; and

considering, if it is determined that the received downlink resource assignment is for the UE'"'"'s C-RNTI and the previous downlink resource assignment indicated to the HARQ entity of the same HARQ process was the configured downlink resource assignment, a NDI of the downlink resource assignment is toggled regardless of a value of the NDI as the received downlink resource assignment for initial transmission.

2. The method of claim 1, further comprises:

maintaining, if it is determined that at least one of the received downlink resource assignment is not for the UE'"'"'s C-RNTI and/or the previous downlink resource assignment indicated to the HARQ entity of the same HARQ process was not the configured downlink resource assignment, the HARQ process according to whether the value of the current NDI has been toggled.

3. The method of claim 2, wherein the maintaining of the HARQ process comprises:

comparing a current New Data Indicator (NDI) of the downlink resource assignment message with a previous NDI;

maintaining, if the current NDI and the previous NDI are identical with each other, the HARQ process; and

processing, if the current NDI and the previous NDI are different from each other, the downlink resource assignment message as the resource assignment message for initial transmission.

4. A transmission control method for Hybrid Automatic Repeat reQuest (HARQ) in a mobile communication system, the method comprising:

receiving a downlink resource assignment on a downlink control channel;

determining whether the received downlink resource assignment is for a Cell-Radio Network Temporary Identifier (C-RNTI) and a semi-persistent scheduling resource assignment prior to the received downlink resource assignment is used at a configured semi-persistent scheduling occasion;

comparing, if it is determined that the semi-persistent scheduling resource assignment prior to the received downlink resource assignment is not used at the configured semi-persistent scheduling occasion and/or the received downlink resource assignment is not for the C-RNTI, values between a current NDI and a previous NDI of downlink resource assignment; and

continuing, if the values of both the NDIs are identical with each other, the HARQ operation by combining.