ADAPTIVE SCHEDULING AND HARQ MANAGEMENT FOR COOPERATIVE TRANSMISSIONS

• US 20140241254A1
• Filed: 04/01/2011
• Published: 08/28/2014
• Est. Priority Date: 04/02/2010
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Kaur, Samian J., Deng, Tao, Vanganuru, Kiran K., Sternberg, Gregory S., Pietraski, Philip J., Pragada, Ravikumar V., Raghothaman, Balaji, Sfar, Sana, Puzio, Matthew G.
• Granted Patent: US 9,306,719 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

Disclosed herein is HARQ management, scheduling, and measurements, among other things, for cooperative communication. For example, methods herein may be used in situations wherein relaying or helping mechanisms may comprise the use of a relay node which is part of a fixed infrastructure or a relay node which may be a mobile wireless transmit/receive unit (WTRU). In said situations, a first transmission with first data is established between an evolved NodeB (eNB) and a WTRU. A second transmission with second data is established between a relay node (RN) and the WTRU. Said first and second data are combined for decoding. A single HARQ feedback for said first and second transmissions is sent from the WTRU to the eNB.

Claims

1. A wireless transmit/receive unity (WTRU), comprising:

a processor configured to receive a first transmission comprising first data on a first hop, to receive a second transmission comprising second data on a second hop, to combine the first data and the second data from the first and second transmissions for decoding, and to send HARQ feedback for the first transmission and the second transmission.

2. The WTRU of claim 1, wherein the first transmission is from a base station.

3. The WTRU of claim 1, wherein the second transmission is from a relay node.

4. The WTRU of claim 2, wherein the HARQ feedback is sent to the base station.

5. The WTRU of claim 4, wherein the HARQ feedback sent to the base station is overheard and decoded by a relay node.

6. The WTRU of claim 1, wherein the second data comprises a portion of data included in the first data.

7. The WTRU of claim 1, further configured to have a first HARQ entity for the first transmission and a second HARQ entity for the second transmission.

8. The WTRU of claim 1, further configured to have a HARQ entity reserved for the first transmission and the second transmission.

9. The WTRU of claim 3, wherein the relay node is a second WTRU.

10. A method for cooperative transmission in a wireless system, the method comprising:

receiving a first transmission comprising first data on a first hop;

receiving a second transmission comprising second data on a second hop;

combining the first data and the second data from the first and second transmissions for decoding; and

sending HARQ feedback for the first transmission and the second transmission.

11. The method of claim 10, wherein the first transmission uses a first HARQ entity and the second transmission uses a second HARQ entity.

12. The method of claim 11, further comprising:

coordinating the first HARQ entity with the second HARQ entity.

13. The method of claim 11, further comprising:

jointly decoding the first data and the second data.

14. The method of claim 10, wherein the second data comprises a portion of data included in the first data.

15. The method of claim 10, wherein the method is performed by a wireless transmit/receive unit.

16. The method of claim 10, wherein the method is performed by an evolved Node B.

17. A wireless transmit/receive unit (WTRU), comprising:

a processor configured to receive a first transmission on a first hop comprising first data at a first HARQ entity, to receive a second transmission on a second hop comprising second data at a second HARQ entity, to coordinate the first HARQ entity with the second HARQ entity; and

to send HARQ feedback.

18. The WTRU in claim 17, wherein the processor is configured to coordinate the first HARQ entity with the second HARQ entity, such that first data and the second data is jointly decoded.

19. The WTRU in claim 17, further configured to receive downlink control information (DCI), wherein the DCI may include control information with regard to coordinating a transmission with a relay node.

20. The WTRU of claim 19, wherein the relay node receives crosslink information from a base station.