Methods and devices for partial upper layer frame loss detection based retransmission

• US 20040013115A1
• Filed: 07/18/2002
• Published: 01/22/2004
• Est. Priority Date: 07/18/2002
• Status: Active Grant

• Current Assignee: RPX Corporation
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Zhang, Qinqing, Su, Hsuan-Jung
• Granted Patent: US 7,239,610 B2
• Time in Patent Office: Days
• US Class Current: 370/392
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04L 69/321 Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers

Abstract

The present invention is aimed at techniques for detecting the “partial loss” of an upper layer frame. One technique envisions a detection platform adapted to determine whether a packet is a final packet for a particular upper layer frame. A comparator platform then compares packets received free of transmission errors with variables indicative of whether all received packets in the particular upper layer frame have been received correctly when a final packet is detected. A transmission platform then sends a signal indicative of whether the packets received without transmission errors constitute the particular upper layer frame so that lost packets can be retransmitted quickly.

Claims

1. A device for detecting the partial loss of an upper layer frame, comprising:

a detection platform adapted to determine whether a received packet is a final packet in a particular upper layer frame;

a comparator platform adapted to compare variables indicative of whether all received packets in the particular upper layer frame have been received correctly when a final packet is detected; and

a transmission platform adapted to send a signal indicative of whether a correct version of the particular upper layer frame was received.

2. The device of claim 1, further comprising a reception unit adapted to receive at least one previously transmitted packet.

3. The device of claim 2, wherein a second device is adapted to transmit at least one packet in a particular upper layer frame to the reception unit.

4. The device of claim 1, wherein the variables comprise receiver state variable, VR(R).

5. The device of claim 1, wherein the transmission platform is further adapted to send another signal indicative of which additional packets of the correct version of the particular upper layer frame need to be received.

6. The device of claim 1, wherein the detection platform is further adapted to determine whether the received packet is in a next particular upper layer frame.

7. The device of claim 6, wherein the transmission platform is further adapted to send another signal indicative of which additional packets of the correct version of the particular upper layer frame need to be received when the received packet is in a next particular upper layer frame.

8. The device of claim 1, wherein the detection platform is further adapted to detect whether the received packet comprises a super field and to analyze the detected super field to determine whether the received packet is in a particular upper layer frame.

9. The device of claim 8, wherein the detection platform is further adapted to utilize the super field of the received packet to determine whether the received packet is in a next particular upper layer frame.

10. The device of claim 1, wherein the device comprises a traffic processing unit.

11. The device of claim 1, wherein the transmission platform is adapted to send the signal after a predetermined time period expires.

12. The device of claim 11, wherein the transmission platform is adapted to reset the predetermined time period.

13. A method for detecting the partial loss of an upper layer frame, comprising:

determining whether a received packet is a final packet in a particular upper layer frame;

comparing all received packets in the particular upper layer frame to variables indicative of whether all received packets in the particular upper layer frame have been received correctly when a final packet is detected; and

sending a signal indicative of whether a correct version of the particular upper layer frame was received.

14. The method of claim 13, further comprising receiving at least one previously transmitted packet.

15. The method of claim 14, further comprising transmitting at least one packet in a particular upper layer frame.

16. The method of claim 13, further comprising sending another signal indicative of which additional packets of the correct version of the particular upper layer frame need to be received.

17. The method of claim 13, further comprising determining whether a received packet is in a next particular upper layer frame.

18. The method of claim 17, further comprising sending another signal indicative of which additional packets of the correct version of the particular upper layer frame need to be received when the received packet is in a next particular upper layer frame.

19. The method of claim 13, further comprising detecting whether a received packet comprises a super field and analyzing the detected super field to determine whether the received packet is in a particular upper layer frame.

20. The method of claim 19, further comprising utilizing the super field of the received packet to determine whether the received packet is in a next particular upper layer frame.

21. The method of claim 13, further comprising sending the signal after a predetermined time period expires.

22. The method of claim 21, further comprising resetting the predetermined time period.