Method and apparatus for transmitting and receiving status report in a mobile communication system

• US 20070283032A1
• Filed: 04/16/2007
• Published: 12/06/2007
• Est. Priority Date: 04/14/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Soeng-Hun, Lieshout, Gert-Jan, Velde, Himke
• Granted Patent: US 9,929,832 B2
• Time in Patent Office: Days
• US Class Current: 709/230
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems

Abstract

A method and apparatus for transmitting/receiving a status report in a mobile communication system where Automatic Repeat reQuest (ARQ) and Hybrid Automatic Repeat reQuest (HARQ) operate together. An ARQ receiving (Rx) entity determines whether transmission of the status report is permitted, if a predetermined status report generation condition is satisfied. If the transmission of the status report is permitted, the ARQ Rx entity generates a status report depending on a reception status of ARQ packets received up to the time the transmission of the status report is permitted, and transmits the generated status report to an ARQ transmitting (Tx) entity through an allocated transmission resource. The ARQ Tx entity determines an initial reception time of an HARQ packet including the status report as a generation time of the status report, and performs retransmission according to the status report.

Claims

1. A method for transmitting a status report of an Automatic Repeat reQuest (ARQ) layer in a mobile communication system including the ARQ layer and a Hybrid Automatic Repeat reQuest (HARQ) layer, the method comprising:

determining whether transmission of the status report is permitted, when a predetermined status report generation condition is satisfied in an ARQ receiving (Rx) entity;

if transmission of the status report is permitted, generating a status report depending on a reception status of ARQ packets up to the time the transmission of the status report is permitted; and

transmitting the generated status report to an ARQ transmitting (Tx) entity through an allocated transmission resource.

2. The method of claim 1, wherein the status report includes sequence numbers of ARQ packets successfully received up to the time the transmission of the status report is permitted, and sequence numbers of ARQ packets reception-failed up to the time the transmission of the status report is permitted.

3. The method of claim 1, wherein the time the transmission of the status report is permitted, indicates the time at which a transmission resource used for transmitting data including the status report is allocated.

4. The method of claim 1, further comprising:

determining that the status report generation condition is satisfied, when a present time reaches a transmission time interval based on a predetermined period.

5. The method of claim 1, further comprising:

determining that the status report generation condition is satisfied, when a missing ARQ packet is detected in the course of receiving ARQ packets from the ARQ Tx entity.

6. A method for receiving a status report of an Automatic Repeat reQuest (ARQ) layer in a mobile communication system including the ARQ layer and a Hybrid Automatic Repeat reQuest (HARQ) layer, the method comprising:

recording, by an HARQ transmitting/receiving (Tx/Rx) entity, an initial reception time of an HARQ packet, when the HARQ packet is initially received from an ARQ receiving (Rx) entity;

detecting a status report contained in the HARQ packet if it is determined that the HARQ packet has been successfully received, and sending the detected status report to an ARQ transmitting (Tx) entity together with the initial reception time of the HARQ packet; and

recognizing, by the ARQ Tx entity, the initial reception time as a generation time of the status report, and retransmitting retransmission-requested ARQ packets according to the status report.

7. The method of claim 6, wherein the status report includes sequence numbers of ARQ packets successfully received at the ARQ Rx entity up to the time the transmission of the status report is permitted, and sequence numbers of failed ARQ packets at the ARQ Rx entity up to the time the transmission of the status report is permitted.

8. The method of claim 7, wherein the time the transmission of the status report is permitted, indicates a time at which a transmission resource used for transmitting data including the status report is allocated.

9. The method of claim 6, further comprising:

receiving decoding control information of the HARQ packet over a control channel, and checking a Retransmission Sequence Number (RSN) and a New Data Indicator (NDI) included in the decoding control information; and

determining that the HARQ packet has been initially received, if the RSN is set to ‘

0’

or the NDI is set to a different value from a previous value.

10. An apparatus for transmitting a status report of an Automatic Repeat reQuest (ARQ) layer in a mobile communication system including the ARQ layer and a Hybrid Automatic Repeat reQuest (HARQ) layer, the apparatus comprising:

a status report generator for determining whether transmission of the status report is permitted, when a predetermined status report generation condition is satisfied in an ARQ receiving (Rx) entity, and if transmission of the status report is permitted, generating a status report depending on a reception status of ARQ packets up to the time the transmission of the status report is permitted; and

a transmitting entity for transmitting the generated status report to an ARQ transmitting (Tx) entity through an allocated transmission resource.

11. The apparatus of claim 10, wherein the status report includes sequence numbers of ARQ packets successfully received up to the time the transmission of the status report is permitted, and sequence numbers of ARQ packets reception-failed up to the time the transmission of the status report is permitted.

12. The apparatus of claim 10, wherein the time the transmission of the status report is permitted, indicates a time at which a transmission resource used for transmitting data including the status report is allocated.

13. The apparatus of claim 10, wherein the status report generator determines that the status report generation condition is satisfied, when a present time reaches a transmission time interval based on a predetermined period.

14. The apparatus of claim 10, wherein the status report generator determines that the status report generation condition is satisfied, when a missing ARQ packet is detected in the course of receiving ARQ packets from the ARQ Tx entity.

15. An apparatus for receiving a status report of an Automatic Repeat reQuest (ARQ) layer in a mobile communication system including the ARQ layer and a Hybrid Automatic Repeat reQuest (HARQ) layer, the apparatus comprising:

an HARQ transmitting/receiving (Tx/Rx) entity for recording an initial reception time of the HARQ packet, when an HARQ packet is initially received from an ARQ receiving (Rx) entity, and if it is determined that the HARQ packet has been successfully received, detecting a status report contained in the HARQ packet, and outputting the detected status report together with the initial reception time of the HARQ packet; and

an ARQ transmitting (Tx) entity for recognizing the initial reception time as a generation time of the status report, and retransmitting retransmission-requested ARQ packets according to the status report.

16. The apparatus of claim 15, wherein the status report includes sequence numbers of ARQ packets successfully received at the ARQ Rx entity up to the time the transmission of the status report is permitted, and sequence numbers of ARQ packets failed to be received at the ARQ Rx entity up to the time the transmission of the status report is permitted.

17. The apparatus of claim 16, wherein the time the transmission of the status report is permitted, indicates a time at which a transmission resource used for transmitting data including the status report is allocated.

18. The apparatus of claim 15, wherein the HARQ Tx/Rx entity:

receives decoding control information of the HARQ packet over a control channel, and checks a Retransmission Sequence Number (RSN) and a New Data Indicator (NDI) included in the decoding control information; and

determines that the HARQ packet has been initially received, if the RSN is set to ‘

0’

or the NDI is set to a different value from a previous value.