UTILIZING HARQ FOR UPLINK GRANTS RECEIVED IN WIRELESS COMMUNICATIONS

• US 20100037113A1
• Filed: 07/10/2009
• Published: 02/11/2010
• Est. Priority Date: 08/08/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Meylan, Arnaud, Krishnamoorthy, Srividhya, Maheshwari, Shailesh, Kumar, Vanitha A.
• Granted Patent: US 9,094,202 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H04L 1/1657 Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
• 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 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 1/1896 ARQ related signaling

Abstract

Systems and methodologies are described that facilitate utilizing hybrid automatic repeat/request (HARQ) in system access communications. A HARQ entity is provided that manages a plurality of HARQ processes, which can typically use new data indicators (NDI) to determine when received data is a new transmission or retransmission. For resource grants, the HARQ entity can determine whether the communication is a new transmission or retransmission based on the type of message that contains the grant. In addition, an address comprised within the message, a previous use of the HARQ process, and/or the like can further be utilized to determine whether the message is a new transmission or retransmission. Once determined, the HARQ entity can provide the message to the appropriate HARQ process along with the indication of new transmission or retransmission.

Claims

1. A method for interpreting hybrid automatic repeat/request (HARQ) functionality in system access procedures, comprising:

receiving a communication comprising a resource grant from an access point in a wireless network;

determining whether the communication is a new transmission or retransmission based at least in part on a type thereof, and

providing the communication to a HARQ process along with an indication of new transmission or retransmission based on the determination.

2. The method of claim 1, wherein the type of the communication is a random access response and the communication is provided to the HARQ process along with an indication of new transmission.

3. The method of claim 2, further comprising transmitting a random access request to the access point in switching from an idle mode to an active mode, wherein the communication is received in response to the random access request.

4. The method of claim 1, wherein the type of the communication is a control channel transmission.

5. The method of claim 4, further comprising determining an address associated with the control channel transmission.

6. The method of claim 5, wherein the address is a temporary address related to a device and the communication is provided to the HARQ process along with an indication of retransmission.

7. The method of claim 5, wherein the address is a persistent address related to the device, a buffer of the HARQ process comprises a response to a system access response, and the communication is provided to the HARQ process along with an indication of new transmission.

8. The method of claim 1, wherein the communication further comprises an identifier related to the HARQ process.

9. A wireless communications apparatus, comprising:

at least one processor configured to;

receive a response to a system access request comprising a resource grant from one or more access points in a wireless network;

determine a type of the response; and

provide the response to a hybrid automatic repeat/request (HARQ) process along with an indication of new transmission or retransmission based at least in part on the type of the response; and

a memory coupled to the at least one processor.

10. The wireless communications apparatus of claim 9, wherein the system access request is a random access preamble, the at least one processor determines the type of the response as a random access response, and the at least one processor provides the response to the HARQ process along with an indication of new transmission.

11. The wireless communications apparatus of claim 9, wherein the at least one processor determines the type of the response, which comprises an associated address related to the wireless communications apparatus.

12. The wireless communications apparatus of claim 11, wherein the at least one processor is further configured to determine whether the address is a temporary or persistent address.

13. The wireless communications apparatus of claim 12, wherein the at least one processor determines the address is a temporary address and provides the response to the HARQ process along with an indication of retransmission.

14. The wireless communications apparatus of claim 12, wherein the address is a persistent address, a buffer of the HARQ process comprises a scheduled transmission related to a system access procedure, and the at least one processor provides the response to the HARQ process along with an indication of new transmission.

15. The wireless communications apparatus of claim 9, wherein the response further comprises an identifier related to the HARQ process and a new data indicator.

16. An apparatus that facilitates utilizing hybrid automatic repeat/request (HARQ) communications in system access procedures, comprising:

means for receiving a communication from an access point in response to a system access request; and

means for providing the communication to a HARQ process along with an indication of new transmission or retransmission determined based at least in part on a type of the communication.

17. The apparatus of claim 16, wherein the type of the communication relates to a random access response and the means for providing provides the communication to the HARQ process along with an indication of new transmission.

18. The apparatus of claim 17, wherein the means for receiving a communication receives the communication over an established random access channel in response to a random access preamble transmitted over the established random access channel.

19. The apparatus of claim 16, wherein the type of the communication relates to a transmission received over a control channel.

20. The apparatus of claim 19, wherein the means for providing the communication to a HARQ process further determines an address related to the apparatus specified in the communication.

21. The apparatus of claim 20, wherein the means for providing the communication to a HARQ process determines the address is a temporary address and provides the communication to the HARQ process along with an indication of retransmission.

22. The apparatus of claim 20, wherein the means for providing the communication to a HARQ process determines the address is a persistent address and provides the communication to the HARQ process along with an indication of new transmission based on determining that a buffer related to the HARQ process comprises a scheduled transmission related to a system access procedure.

23. The apparatus of claim 16, wherein the communication further comprises an identifier related to the HARQ process.

24. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to receive a communication comprising a resource grant from an access point in a wireless network;

code for causing the at least one computer to determine whether the communication is a new transmission or retransmission based at least in part on a type thereof, and

code for causing the at least one computer to provide the communication to a hybrid automatic repeat/request (HARQ) process along with an indication of new transmission or retransmission based on the determination.

25. The computer program product of claim 24, wherein the type of the communication is a random access response and the communication is provided to the HARQ process along with an indication of new transmission.

26. The computer program product of claim 25, wherein the computer-readable medium further comprises code for causing the at least one computer to transmit a random access request to the access point when switching from an idle mode to an active mode, wherein the communication is received in response to the random access request.

27. The computer program product of claim 24, wherein the type of the communication is a control channel transmission.

28. The computer program product of claim 27, wherein the computer-readable medium further comprises code for causing the at least one computer to determine an address associated with the control channel transmission.

29. The computer program product of claim 28, wherein the address is a temporary address related to a device and the communication is provided to the HARQ process along with an indication of retransmission.

30. The computer program product of claim 28, wherein the address is a persistent address related to the device, a buffer of the HARQ process comprises a response to a system access response, and the communication is provided to the HARQ process along with an indication of new transmission.