APPARATUS AND METHOD FOR ACK CHANNEL TRANSMISSION IN WIRELESS RELAY COMMUNICATION SYSTEM

• US 20090122746A1
• Filed: 11/07/2008
• Published: 05/14/2009
• Est. Priority Date: 11/08/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: TAORI, Rakesh, CHANG, Young-Bin, SON, Jung-Je
• Granted Patent: US 8,248,987 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

An apparatus and a method for transmitting ACKnowledge (ACK) channels by a Relay Station (RS) in a wireless communication system are provided. The method includes, when receiving one or more ACK information from one or more lower nodes, checking ACK channel constitution information provided from an upper node, arranging one or more ACK channels to transmit corresponding ACK information according to the ACK channel constitution information by distinguishing ACK information of one or more data scheduled by the upper node and ACK information of one or more retransmission data not scheduled by the upper node, and transmitting the one or more ACK information to the upper node in the arranged ACK channels.

Claims

1. A method for transmitting ACKnowledge (ACK) channels by a Relay Station (RS) in a wireless communication system, the method comprising:

when receiving one or more ACK information from one or more lower nodes, checking ACK channel constitution information provided from an upper node;

arranging one or more ACK channels to transmit corresponding ACK information according to the ACK channel constitution information by distinguishing ACK information of one or more data scheduled by the upper node and ACK information of one or more retransmission data not scheduled by the upper node; and

transmitting the one or more ACK information to the upper node in the arranged ACK channels.

2. The method of claim 1, wherein the lower node comprises at least one of a Mobile Station (MS) and a lower RS, and the upper node comprises at least one of a Base Station (BS) and an upper RS.

3. The method of claim 1, wherein the checking of the ACK channel constitution information comprises:

in a system configuration, determining at least one of ACK channel constitution information preset through a communication with the upper node and ACK channel constitution information using a control signal received from the upper node.

4. The method of claim 1, wherein the ACK channel constitution information comprises information relating to a first ACK channel region for allocating ACK channels to one or more data scheduled by the upper node, and information relating to a second ACK channel region for allocating ACK channels to one or more retransmission data sent from one or more RSs to a lower node without the scheduling of the upper node.

5. The method of claim 4, wherein the ACK channel constitution information comprises arrangement information of one or more ACK channels to be allocated in at least one of the first ACK channel region and the second ACK channel region.

6. The method of claim 5, wherein the arrangement information of the ACK channels in the first ACK channel region is determined by considering at least one of a reception order of scheduling information of data carrying the ACK information and the number of hops to a lower node that originally sent ACK information corresponding to the transmitted data.

7. The method of claim 5, wherein the arrangement of the ACK channels in the second ACK channel region is determined by considering at least one of a type of a lower node that sends ACK information corresponding to the transmitted data and a reception order of the ACK information.

8. The method of claim 1, further comprising:

detecting scheduling information provided from the upper node;

transmitting data to the one ore more lower nodes according to the scheduling information; and

determining whether ACK information is received in response to the data transmitted to the lower nodes.

9. The method of claim 8, further comprising:

when one or more lower nodes request a retransmission, transmitting retransmission data to the lower nodes; and

determining whether ACK information is received in response to the retransmission data to the lower nodes.

10. The method of claim 1, wherein the transmitting of the ACK information to the upper node comprises:

when an ACK information transmission time determined by the upper node arrives, transmitting ACK information to the upper node over the arranged ACK channels.

11. An apparatus for a Relay Station (RS) in a wireless communication system, the apparatus comprising:

a receiving part for receiving a signal;

an ACKnowledge (ACK) channel constitutor for, when receiving one or more ACK information from one or more lower nodes through the receiving part, detecting ACK channel constitution information provided from an upper node; and

a transmitting part for arranging one or more ACK channels to transmit corresponding ACK information according to the ACK channel constitution information by distinguishing ACK information of one or more data scheduled by the upper node and ACK information of one or more retransmission data not scheduled by the upper node, and for transmitting the one or more ACK information to the upper node.

12. The apparatus of claim 11, wherein the lower node comprises at least one of a Mobile Station (MS) and a lower RS, and the upper node comprises at least one of a Base Station (BS) and an upper RS.

13. The apparatus of claim 11, wherein the ACK channel constitutor, in a system configuration, detects at least one of ACK channel constitution information preset through communication with the upper node and ACK channel constitution information using a control signal received from the upper node.

14. The apparatus of claim 11, wherein the ACK channel constitutor detects ACK channel constitution information that comprises information relating to a first ACK channel region for allocating ACK channels to one or more data scheduled by the upper node, and information relating to a second ACK channel region for allocating ACK channels to one or more retransmission data sent from one or more RSs to a lower node without the scheduling of the upper node.

15. The apparatus of claim 14, wherein the ACK channel constitutor detects ACK channel constitution information that comprises arrangement information of one or more ACK channels to be allocated into at least one of the first ACK channel region and the second ACK channel region.

16. The apparatus of claim 15, wherein the ACK channel constitutor confirms the arrangement information of the ACK channels in the first ACK channel region determined by at least one of considering a reception order of scheduling information of data carrying the ACK information and the number of hops to a lower node that originally sent ACK information corresponding to the transmitted data.

17. The apparatus of claim 15, wherein the ACK channel constitutor detects the arrangement information of the ACK channels in the second ACK channel region determined by at least one of considering a type of a lower node that sends ACK information corresponding to the transmitted data and a reception order of the ACK information.

18. The apparatus of claim 11, wherein the transmitting part comprises:

an ACK channel generator for arranging one or more ACK channels to transmit the one or more ACK information according to the ACK channel constitution information by distinguishing ACK information of one or more data scheduled by the upper node and ACK information of one or more retransmission data not scheduled by the upper node; and

a transmitter for, when an ACK information transmission time determined by the upper node arrives, transmitting the one or more ACK information to the upper node over the arranged ACK channels.

19. The apparatus of claim 11, wherein the transmitting part transmits data to the one or more lower nodes according to the scheduling information, and

when one or more lower nodes request a retransmission, the transmitting part sends the retransmission data to the lower nodes

20. The apparatus of claim 19, wherein the receiving part receives ACK information of the data and the retransmission data sent to the lower nodes.