Method and apparatus for fast closed-loop rate adaptation in a high rate packet data transmission

• US 8,498,308 B2
• Filed: 11/03/2006
• Issued: 07/30/2013
• Est. Priority Date: 05/12/2000
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Esteves, Eduardo A. S., Attar, Rashid A., Sindhushayana, Nagabhushana T.
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): NGUYEN, PHUONGCHAU BA
• Application Number:
  US11/592,568
• Publication Number:
  US 20070064646A1
• Time in Patent Office: 2,461 Days
• Field of Search: 370/230.1, 370/232, 370/243, 370/252, 370/253, 370/322, 370/335, 370/337, 370/340, 370/348, 370/347, 370/352, 370/395.2, 370/412, 370/442, 370/450, 370/451, 370/452, 370/454, 370/458, 370/459, 370/468, 370/524, 375/133, 375/222, 375/225, 375/227, 455/62, 455/67.11, 455/67.13, 455/69, 455/436, 455/450, 455/452.2, 455/502, 455/509, 455/519, 340/825.25
• US Class Current: 370/442
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters

Abstract

In a high data rate communication system capable of variable rate transmission, an open loop rate control can be adjusted with a closed loop rate control to maximize throughput. An access point generates interleaved multi-slot packets that allow an access terminal to transmit indicator messages to the access point in accordance with recently received data carried within slots of the multi-slot packets.

Claims

1. A method for modifying an open-loop rate adaptation method to produce a hybrid open loop/closed loop rate structure, comprising:

receiving a first slot of a first multi-slot packet;

decoding the first slot of the first multi-slot packet; and

terminating transmission of remaining slots of the first multi-slot packet if the decoding is successful;

if decoding of the first multi-slot packet is not successful, the method further comprising;

receiving a next slot of the first multi-slot packet;

combining the first slot and the next slot of the first multi-slot packet to form a combination;

decoding the combination; and

terminating transmission of remaining slots of the first multi-slot packet if decoding of the combination is successful to produce an open-loop/closed loop rate adaptation that generates a time interleaved structure for slots in data pockets to allow an access terminal to transmit indicator messages to the access point during periods associated with gaps inserted in the interleaved structure.

2. The method as in claim 1, wherein decoding the first slot comprises:

checking a cyclic redundancy code of the first slot.

3. The method as in claim 1, further comprising:

transmitting, periodically, information indicative of a quality measure of the wireless channel,

wherein terminating transmission of remaining slots of the first multi-slot packet if the decoding is successful further comprises transmitting a closed loop rate ,control message.

4. The method as in claim 1, wherein if decoding is successful, the method further comprising:

transmitting an indicator message indicating successful decoding.

5. The method as in claim 1, wherein combining the first slot and the next slot of the first multi-slot packet to form a combination further comprises:

accumulating soft code symbols.

6. The method as in claim 5, wherein decoding the combination further comprises:

generating soft code symbols for each received slot.

7. The method as in claim 1, wherein the first slot and the next slot of the multi-slot packet are received in non-contiguous time slots.

8. The method as in claim 1, wherein each slot of the first multi-slot packet is received in time slots contiguous to gap slots.

9. The method as in claim 1, further comprising:

receiving a first slot of a second multi-slot packet in a time slot allocated to one of the remaining non-contiguous slots of the first multi-slot packet.

10. The method as in any of claim 5, or 6, wherein each slot of the first multi-slot packet is received at a predetermined time slot.

11. The method as in claim 1, wherein terminating comprises:

transmitting an indicator message indicating successful reception.

12. The method as in claim 11, further comprising:

receiving a first slot of a second multi-slot packet in a time slot allocated to one of the remaining slots of the first multi-slot packet.

13. The method as in any of claim 5, 6, 11, or 12, wherein the first multi-slot packet has a target packet error rate corresponding to a normal end of the first multi-slot packet, and wherein a packet error rate of the received first multi-slot packet is different from the target packet error rate.

14. The method as in claim 13, wherein the normal end of the first multi-slot packet corresponds to transmission of all slots of the multi-slot packet.

15. The method as any of claim 5, 6, 11, 12, or 14, wherein the first multi-slot packet has a target data rate corresponding to transmission of all slots of the first multi-slot packet, and wherein a data rate of the received first multi-slot packet is greater than the target data rate.

16. The method as in claim 15, wherein the terminating provides closed loop rate adaptation for multi-slot packet data rates.

17. The method as in claim 15, further comprising:

transmitting a data rate indicator, wherein the target data rate for the first multi-slot packet is a function of the data rate indicator.

18. The method as claim 1, wherein each slot of the first multi-slot packet is received at a predetermined time slot and wherein the predetermined time slots of the first multi-slot packet are interlaced with predetermined gap slots in an alternating pattern.

19. The method as in claim 18, wherein receiving slots of the multi-slot packet interlaced with the predetermined gap slots further comprises:

receiving the slots of the multi-slot packet in non-contiguous time slots.

20. The method as in claim 18, comprising:

decoding a slot of the multi-slot packet in a time slot corresponding to a predetermined gap slot, wherein the gap slot occurs after the predetermined time of the slot of the multi-slot packet.

21. The method as in claim 1, further comprising:

receiving all slots of the first multi-slot packet;

combining all slots of the first multi-slot packet to form a combination;

decoding the combination;

transmitting a negative acknowledgment if decoding of the combination is not successful; and

transmitting an indicator message indicating successful reception if decoding of the combination is successful.

22. The method as in claim 21, wherein transmitting a negative acknowledgment further comprises:

sending an extend indicator,

wherein the method further comprises;

receiving retransmission of at least one of the slots of the first multi-slot packet in response to sending the extend indicator.

23. The method as in claim 1, wherein if decode is not successful, the method further comprising:

sending a negative acknowledgement (NAK); and

sending an extend indicator;

wherein the method further comprises;

receiving retransmission of at least one of the slots of the first multi-slot packet in response to sending the extend indicator.

24. A wireless apparatus for modifying an open-loop rate adaptation method to produce a hybrid open loop/closed loop rate structure, comprising:

means for receiving a first slot of a first multi-slot packet;

means for decoding the first slot of the first multi-slot packet; and

further comprising;

means for receiving a next slot of the first multi-slot packet if decoding of the first multi-slot packet is not successful;

means for combining the first slot and the next slot of the first multi-slot packet to form a combination;

means for decoding the combination; and

means for terminating transmission of remaining slots of the first multi-slot packet if decoding of the combination is successful to produce an open-loop/closed loop rate adaptation that generates a time interleaved structure for slots in data pockets to allow or access terminal to transmit indicator messages to the access point during periods associated with gaps inserted in the interleaved structure.

25. A wireless apparatus as in claim 24 wherein the first multi-slot packet has a target packet error rate corresponding to a normal end of the first multi-slot packet, and wherein a packet error rate of the received first multi-slot packet is different from the target packet error rate, and further comprising:

means for transmitting a data rate indicator, wherein the target data rate for the first multi-slot packet is a function of the of the data rate indicator.

26. The apparatus as in any of claim 24 wherein the apparatus is a computer program product that increases data rate and efficiency when coupled to a computing device.

27. A non-transitory computer readable media programmed provide a modified open-loop rate adaptation method to produce a hybrid open loop/closed loop rate adaption structure comprising:

code for causing a computer to receive a first slot of a first multi-slot packet;

code for causing a computer to decode the first slot of the first multi-slot packet; and

said computer program product further comprising;

code for causing a computer to receive a next slot of the first multi-slot packet if the decode is not successful;

code for causing a computer to combine the first slot and the next slot of the first multi-slotpacket to form a combination;

code for causing a computer to decode the combination; and

code for causing a computer to terminate the remaining slots of the first multi-slot packet if decoding of the combination is successful to produce on open-loop/closed loop rate adaptation that generates a time interleaved structure for slots in data pockets to allow or access terminal to transmit indicator messages to the access point during periods associated with gaps inserted in the interleaved structure.

28. The non-transitory computer readable media of claim 27, further comprising:

code for causing a computer to periodically transmit information indicative of a quality measure of the wireless channel,

wherein terminating transmission of remaining slots of the first multi-slot packet further comprises transmitting a closed loop rate control message if the decoding is successful.

29. A non-transitory computer readable media programmed to perform a method for modifying an open-loop rate adaptation algorithm to produce a hybrid open loop/closed loop rate adaptation that generates a time interleaved structure for slots in data packets to allow an access terminal to transmit indicator messages to the access point during periods associated with gaps inserted in the interleaved structure, by executing:

readable media of claim 27 further comprising;

code for causing a computer to receive all slots of the first multi-slot packet;

code for causing a computer to combine all slots of the first multi-slot packet to form a combination;

code for causing a computer to decode the combination;

code for causing a computer to transmit a negative acknowledgment if decoding of the combination is not successful; and

code for causing a computer to transmit an indicator message to indicate successful reception if decoding of the combination is successful.

30. A non-transitory computer readable media programmed to perform a method for modifying an open-loop rate adaptation algorithm to produce a hybrid open loop/closed loop rate adaptation that generates a time interleaved structure for slots in data packets to allow an access terminal to transmit indicator messages to the access point during periods associated with gaps inserted in the interleaved structure, by executing:

a first procedure for receiving a first slot of a first multi-slot packet;

a second procedure for decoding the first slot of the first multi-slot packet; and

a third procedure for terminating transmission of the remaining slots of the first multi-slot packet if the decoding is successful;

,

if decoding of the first multi-slot packet is not successful, the procedure further comprising;

receiving a next slot of the first multi-slot packet;

combining the first slot and the next slot of the first multi-slot packet to form a combination;

decoding the combination; and

terminating transmission of remaining slots of the first multi-slot packet if decoding of the combination is successful to produce an open-loop/closed loop rate adaptation that generates a time interleaved structure for slots in data pockets to allow an access terminal to transmit indicator messages to the access point during periods associated with gaps inserted in the interleaved structure.