Method and system for dynamic ACK/NACK repetition for robust downlink MAC PDU transmission in LTE

• US 8,204,010 B2
• Filed: 09/27/2007
• Issued: 06/19/2012
• Est. Priority Date: 06/18/2007
• Status: Active Grant

• Current Assignee: Blackberry Limited
• Original Assignee: Blackberry Limited
• Inventors: Suzuki, Takashi, Cai, Zhijun, Womack, James Earl
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): HALIYUR, VENKATESH N
• Application Number:
  US11/862,679
• Publication Number:
  US 20080310389A1
• Time in Patent Office: 1,727 Days
• Field of Search: 370 28-442, 714748-750
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 28/04 Error control

Abstract

A method and apparatus for dynamic acknowledgement repetition for a downlink medium access control packet data unit transmission ‘MAC PDU’ requiring multiple acknowledgements, the method having the steps of: receiving the downlink MAC PDU requiring multiple acknowledgements; and utilizing a differentiating factor and acknowledgement scheme, sending the multiple acknowledgements.

Claims

1. A method for providing repetitions of acknowledgement from a user equipment, the method comprising:

responsive to receipt of a single transmission of a medium access control packet data unit by the user equipment;

transmitting in a first subframe a first ACK response utilizing a first cyclic shift;

transmitting a plurality of additional ACK responses, each of the plurality of additional ACK responses utilizing a second cyclic shift, wherein each of the plurality of additional ACK responses is transmitted in a subframe following the first subframe, and

wherein the first ACK response and the plurality of additional ACK responses are transmitted over one or more uplink transmission resources.

2. The method of claim 1, wherein the second cyclic shift is different from the first cyclic shift.

5. The method of claim 1, wherein the first cyclic shift is determined based on a location of a physical downlink control channel.

6. The method of claim 1, wherein each of the plurality of additional ACK responses is a repetition of the first ACK response.

13. The method of claim 1, wherein each of the plurality of additional ACK responses is transmitted in a respective subframe following the first subframe.

3. A user equipment comprising:

a receiver for receiving a single transmission of a medium access control packet data unit;

a transmitter configured to, in response to receipt of the single transmission of a medium access control packet data unit;

transmit in a first subframe a first ACK response utilizing a first cyclic shift;

transmit a plurality of additional ACK responses, each of the plurality of additional ACK responses utilizing a second cyclic shift, wherein each of the plurality of additional ACK responses is transmitted in a subframe following the first subframe, and

wherein the first ACK response and the plurality of additional ACK responses are transmitted over one or more uplink transmission resources.

4. The user equipment of claim 3, wherein the second cyclic shift is different from the first cyclic shift.

7. The user equipment of claim 3, wherein the first cyclic shift is determined based on a location of a physical downlink control channel.

8. The user equipment of claim 3, wherein each of the plurality of additional ACK responses is a repetition of the first ACK response.

14. The user equipment of claim 3, wherein each of the plurality of additional ACK responses is transmitted in a respective subframe following the first subframe.

9. A user equipment, the user equipment comprising:

a receiver configured to receive messages from a network node; and

a transmitter configured to transmit, in response to one of the messages received by the receiver,

(i) a first ACK response utilizing a first cyclic shift, wherein the first ACK response is transmitted in a first subframe;

(ii) a plurality of additional ACK responses, each of the plurality of additional ACK responses utilizing a second cyclic shift, wherein each of the plurality of additional ACK responses is transmitted in a respective subframe following the first subframe, and

wherein the first ACK response and the plurality of additional ACK responses are transmitted over one or more uplink transmission resources.

10. The user equipment of claim 9, wherein the second cyclic shift is different from the first cyclic shift.

11. The user equipment of claim 9, wherein the first cyclic shift is determined based on a location of a physical downlink control channel associated with the message.

12. The user equipment of claim 9, wherein each of the plurality of additional ACK responses is a repetition of the first ACK response.

15. A method for providing repetitions of negative acknowledgement from a user equipment, the method comprising:

responsive to receipt of a single transmission of a medium access control packet data unit by the user equipment;

transmitting in a first subframe a first NACK response utilizing a first cyclic shift;

transmitting a plurality of additional NACK responses, each of the plurality of additional NACK responses utilizing a second cyclic shift, wherein each of the plurality of additional NACK responses is transmitted in a subframe following the first subframe, and

wherein the first NACK response and the plurality of additional NACK responses are transmitted over one or more uplink transmission resources.

16. The method of claim 15, wherein the second cyclic shift is different from the first cyclic shift.

17. The method of claim 15, wherein the first cyclic shift is determined based on a location of a physical downlink control channel.

18. The method of claim 15, wherein each of the plurality of additional NACK responses is a repetition of the first NACK response.

19. The method of claim 15, wherein each of the plurality of additional NACK responses is transmitted in a respective subframe following the first subframe.

20. A user equipment comprising:

a receiver for receiving a single transmission of a medium access control packet data unit; and

a transmitter configured to, in response to receipt of the single transmission of a medium access control packet data unit;

transmit in a first subframe a first NACK response utilizing a first cyclic shift;

transmit a plurality of additional NACK responses, each of the plurality of additional NACK responses utilizing a second cyclic shift, wherein each of the plurality of additional NACK responses is transmitted in a subframe following the first subframe, and

wherein the first NACK response and the plurality of additional NACK responses are transmitted over one or more uplink transmission resources.

21. The user equipment of claim 20, wherein the second cyclic shift is different from the first cyclic shift.

22. The user equipment of claim 20, wherein the first cyclic shift is determined based on a location of a physical downlink control channel.

23. The user equipment of claim 20, wherein each of the plurality of additional NACK responses is a repetition of the first NACK response.

24. The user equipment of claim 20, wherein each of the plurality of additional NACK responses is transmitted in a respective subframe following the first subframe.

25. A user equipment, the user equipment comprising:

a receiver configured to receive messages from a network node; and

a transmitter configured to transmit, in response to one of the messages received by the receiver,

(i) a first NACK response utilizing a first cyclic shift, wherein the first NACK response is transmitted in a first subframe;

(ii) a plurality of additional NACK responses, each of the plurality of additional NACK responses utilizing a second cyclic shift, wherein each of the plurality of additional NACK responses is transmitted in a respective subframe following the first subframe, and

wherein the first NACK response and the plurality of additional NACK responses are transmitted over one or more uplink transmission resources.

26. The user equipment of claim 25, wherein the second cyclic shift is different from the first cyclic shift.

27. The user equipment of claim 25, wherein the first cyclic shift is determined based on a location of a Physical Downlink Control CHannel (PDCCH) associated with the message.

28. The user equipment of claim 25, wherein each of the plurality of additional NACK responses is a repetition of the first NACK response.