Method and system for efficient and reliable data packet transmission

• US 20030067907A1
• Filed: 10/05/2001
• Published: 04/10/2003
• Est. Priority Date: 10/05/2001
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Rezaiifar, Ramin, Wei, Yongbin
• Granted Patent: US 8,089,940 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel

Abstract

A method and system provides for efficient data throughput by avoiding unnecessary data sub-packets transmission while not missing new data packets. The method and system distinguishes between a sub-packet for a current data packet and a sub-packet for a new data packet by assigning different codes to them. When a currently received sub-packet and a previously received sub-packet for a previously decoded data packet have equivalent codes, the remote station sends an acknowledgement signal to the base station, preventing unnecessary sub-packets transmission. When the currently received sub-packet and the previously received sub-packet have different codes, the remote station sends an acknowledgement signal, if the remote station can decode the new packet from the current sub-packet. Otherwise, the remote station sends a negative acknowledgement signal to the base station, and requests more sub-packs for the current packet if the limit on number of transmission for currently received sub-packet has not reached.

Claims

1. A method for receiving data packets on an automatic repeat request (ARQ) channel, the method comprising:

receiving a current sub-packet, the current sub-packet having a current code; and

sending an acknowledgement signal if;

a current packet corresponding to the current sub-packet has been successfully decoded; and

the current code is equivalent to a code for a previous sub-packet.

2. A method for receiving data packets on an automatic repeat request (ARQ) channel, the method comprising:

receiving a current sub-packet, the current sub-packet having a current code; and

sending an acknowledgement signal if;

a predetermined limit for sub-packet transmission for the current data packet has reached; and

the current code is equivalent to a code for a previous sub-packet.

3. A method for receiving data packets on an automatic repeat request (ARQ) channel, the method comprising:

receiving a current sub-packet, the current sub-packet having a current code; and

sending an acknowledgement signal if;

the current code is not equivalent to a code for a previous sub-packet; and

a current data packet corresponding to the current sub-packet may be completely decoded from the current sub-packet.

4. The method of claim 3 further including storing the current code.

5. The method of claim 3 further including:

storing an indication that the current data packet corresponding to the current sub-packet has been completely decoded.

7. The method of claim 4 further including storing the current code.

8. The method of claim 4 further including:

storing an indication that the predetermined limit for sub-packet transmission for the current data packet has reached.

6. A method for receiving data packets on an automatic repeat request (ARQ) channel, the method comprising:

receiving a current sub-packet, the current sub-packet having a current code; and

sending a negative acknowledgement signal if;

the current code is not equivalent to a code for a previous sub-packet; and

a predetermined limit for sub-packet transmission for the current data packet has reached.

9. A method for receiving data packets on an automatic repeat request (ARQ) channel, the method comprising:

receiving a current sub-packet, the current sub-packet having a current code; and

sending a negative acknowledgement signal if;

a current data packet corresponding to the current sub-packet may not be completely decoded from the current sub-packet; and

a predetermined limit for sub-packet transmissions for the current data packet has reached.

10. The method of claim 9 further including:

storing an indication that the current data packet corresponding to the current sub-packet has not been decoded; and

storing an indication that the predetermined limit for sub-packet transmission for the current data packet has reached.

11. A method for sending data packets on an automatic repeat request (ARQ) channel, the method comprising:

sending a first sub-packet, the first sub-packet having a first code; and

sending a second sub-packet, the second sub-packet having a second code,

such that the first code is equivalent to the second code if they are for same data packet.

12. The method of claim 11, wherein the first code and the second code are binary codes.

13. A computer readable media embodying a method for receiving data packets on an automatic repeat request (ARQ) channel, the method comprising:

receiving a current sub-packet, the current sub-packet having a current code; and

sending an acknowledgement signal if;

a current data packet corresponding to the current sub-packet has been successfully decoded; and

the current code is equivalent to a code for a previous sub-packet.

14. An apparatus for receiving data packets on an automatic repeat request (ARQ) channel, comprising:

means for receiving a current sub-packet, the current sub-packet having a current code; and

means for sending an acknowledgement signal if;

a current data packet corresponding to the current sub-packet has been successfully decoded; and

the current code is equivalent to a code for a previous sub-packet.

15. An apparatus for receiving data packets, comprising:

a memory unit; and

a digital signal-processing (DSP) unit communicatively coupled to the memory unit, the DSP unit being capable of;

receiving a current sub-packet, the current sub-packet having a current code; and

sending an acknowledgement signal if;

a current data packet corresponding to the current sub-packet has been successfully decoded; and

the current code is equivalent to a code for a previous sub-packet.

16. A computer readable media embodying a method for sending data packets on an automatic repeat request (ARQ) channel, the method comprising:

sending a first sub-packet, the first sub-packet having a first code; and

sending a second sub-packet, the second sub-packet having a second code,

such that the first code is equivalent to the second code if they are for same data packet.

17. An apparatus for sending data packets on an automatic repeat request (ARQ) channel, comprising:

sending a first sub-packet, the first sub-packet having a first code; and

sending a second sub-packet, the second sub-packet having a second code,

such that the first code is equivalent to the second code if they are for same data packet.

18. An apparatus for receiving data packets, comprising:

a memory unit; and

a digital signal-processing (DSP) unit communicatively coupled to the memory unit, the DSP unit being capable of;

sending a first sub-packet, the first sub-packet having a first code; and

sending a second sub-packet, the second sub-packet having a second code,

such that the first code is equivalent to the second code if they are for same data packet.