DATA DELIVERY IN CONJUNCTION WITH A HYBRID AUTOMATIC RETRANSMISSION MECHANISM IN CDMA COMMUNICATION SYSTEMS

• US 20080212541A1
• Filed: 05/08/2008
• Published: 09/04/2008
• Est. Priority Date: 05/13/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Ho, Sai Yiu Duncan, Malladi, Durga P., Vayanos, Alkinoos Hector
• Granted Patent: US 8,831,004 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• 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;

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 is stored in a Queue ID (QID) field.

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 1, wherein said data channel comprises a hybrid automatic retransmission channel.

7. An apparatus for wireless communications, comprising:

means for determining a priority of a packet to be transmitted;

means for transmitting said packet on a data channel;

means for forming a control message having said priority included therein; and

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

8. The apparatus of claim 7, wherein said priority is stored in a Queue ID (QID) field.

9. The apparatus of claim 7, wherein said data channel comprises a hybrid automatic retransmission channel.

10. 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, form a control message having said priority included therein, and transmit said control message on a control channel concurrently with said data channel.

11. The apparatus of claim 10, wherein said priority is stored in a Queue ID (QID) field.

12. The apparatus of claim 10, wherein said channels comprise a W-CDMA channel.

13. The apparatus of claim 10, wherein said control message further comprises a flushing indication.

14. The apparatus of claim 13, 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.

15. The apparatus of claim 10, wherein said data channel comprises a hybrid automatic retransmission channel.

16. 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, form a control message having said priority included therein, and transmit said control message on a control channel concurrently with said data channel.

17. 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, 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.

18. A 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;

form a control message having said priority included therein; and

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