Data delivery in conjunction with a hybrid automatic retransmission mechanism in CDMA communication systems

• US 8,831,004 B2
• Filed: 05/08/2008
• Issued: 09/09/2014
• Est. Priority Date: 05/13/2002
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Vayanos, Alkinoos Hector, Malladi, Durga Prasad, Ho, Sai Yiu Duncan
• Primary Examiner(s): Nguyen, Hanh N
• Application Number:
  US12/117,493
• Publication Number:
  US 20080212541A1
• Time in Patent Office: 2,315 Days
• Field of Search: 370/389, 370/352, 370/328, 370/394, 370/329, 370/335, 370384-386, 370/410, 370/412, 370/413, 370/431, 370/432, 370/426, 370/441, 370/395.21, 370/392, 370/395.41
• US Class Current: 370/394
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04L 1/1851 using multiple timers
• CPC Class Codes: H04L 1/1877 for semi-reliable protocols, e.g. for less sensitive applications like streaming video buffer level management for video bitstream control arrangements H04N21/44004

Abstract

Techniques for delivering data recovered by a HARQ entity in proper order to higher layers in a CDMA system. In a method, packets are received from the HARQ entity by the re-ordering entity and missing packets among the received packets are detected. Packets may be transmitted in a sequential order based on transmission sequence numbers (TSNs) assigned to the packets, and missing packets may be detected based on the TSNs of the received packets. Delivery of received packets later than the missing packets are stalled because higher layers expect data in-order. A determination is thereafter made whether each missing packet is (1) subsequently received from the HARQ entity or (2) lost, by successively eliminating HARQ channels that may be used to send the missing packet. Received packets previously stalled by each missing packet are delivered after the missing packet is determined to be lost or received.

Claims

1. A method of wireless communications comprising:

determining a priority of a data packet to be transmitted;

transmitting said data packet on a data channel;

transmitting a transmission sequence number indicating an order of said data packet in a sequence of data packets;

forming a control message having said priority included therein; and

transmitting said control message on a control channel concurrently with said data channel.

2. The method of claim 1, wherein said priority corresponds to one of a plurality of priority queues and said control message comprises a Queue ID (QID) field identifying said one of the plurality of priority queues.

3. The method of claim 1, wherein said channels comprise a W-CDMA channel.

4. The method of claim 1, wherein said control message further comprises a flushing indication.

5. The method of claim 4, wherein said flushing indication comprises an indication to flush at least one data channel having a different priority than said priority of said data packet.

6. The method of claim 5, wherein said flushing indication comprises an indication to flush said at least one data channel to a higher protocol layer.

7. The method of claim 1, wherein said data channel comprises a hybrid automatic retransmission channel.

8. The method of claim 1, wherein said transmission sequence number is transmitted on said data channel.

9. The method of claim 1, wherein data packets in said sequence of data packets have the same priority.

10. The method of claim 1, wherein said priority corresponds to one of a plurality of re-ordering buffers at a receiver and said transmission sequence number corresponds to an order of said data packet within said one of the plurality of re-order buffers.

11. An apparatus comprising:

a controller configured to determine a priority of a data packet to be transmitted, transmit said data packet on a data channel, transmit a transmission sequence number indicating an order of said data packet in a sequence of data packets, form a control message having said priority included therein, and transmit said control message on a control channel concurrently with said data channel.

12. The apparatus of claim 11, wherein said priority corresponds to one of a plurality of priority queues and said control message comprises a Queue ID (QID) field identifying said one of the plurality of priority queues.

13. The apparatus of claim 11, wherein said channels comprise a W-CDMA channel.

14. The apparatus of claim 11, wherein said control message further comprises a flushing indication.

15. The apparatus of claim 14, wherein said flushing indication comprises an indication to flush at least one data channel having a different priority than said priority of said data packet.

16. The apparatus of claim 11, wherein said data channel comprises a hybrid automatic retransmission channel.

17. An access terminal, comprising:

a screen for displaying information based on data from a data channel;

one or more input keys configured to display said information; and

a controller configured to determine a priority of a data packet to be transmitted, transmit said data packet on said data channel, transmit a transmission sequence number indicating an order of said data packet in a sequence of data packets, form a control message having said priority included therein, and transmit said control message on a control channel concurrently with said data channel.

18. An access point, comprising:

an antenna;

a transmitter configured to transmit data packets via said antenna; and

a controller configured to determine a priority of a data packet to be transmitted, transmit said data packet on a data channel, transmit a transmission sequence number indicating an order of said data packet in a sequence of data packets, form a control message having said priority included therein, and transmit said control message using said transmitter on a control channel concurrently with said data channel.

19. A non-transitory machine-readable medium comprising instructions executable by a machine for receiving data, the instructions configured when executed to cause the machine to:

determine a priority of a data packet to be transmitted;

transmit said data packet on a data channel;

transmit a transmission sequence number indicating an order of said data packet in a sequence of data packets;

form a control message having said priority included therein; and

transmit said control message on a control channel concurrently with said data channel.