Methods and devices for preventing protocol stalling

• US 7,764,624 B2
• Filed: 07/18/2002
• Issued: 07/27/2010
• Est. Priority Date: 07/18/2002
• Status: Expired due to Fees

• Current Assignee: RPX Corporation
• Original Assignee: Alcatel-Lucent USA, Inc. (Nokia Corporation)
• Inventors: Su, Hsuan-Jung, Zhang, Qinqing
• Primary Examiner(s): Jagannathan, Melanie
• Application Number:
  US10/198,591
• Publication Number:
  US 20040013087A1
• Time in Patent Office: 2,931 Days
• Field of Search: 714748-749
• US Class Current: 370/253
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

The present invention provides techniques for preventing protocol stalling. A control platform is adapted to generate a predetermined time period, wherein the predetermined time period is reset when an acknowledgement signal is received. The control platform is further adapted to examine stored packets to detect new or negatively acknowledged packets. A transmission platform is adapted to transmit an earliest transmitted packet after the predetermined time period expires when no new or negatively acknowledged packets are detected.

Claims

1. A device for preventing protocol stalling, the device comprising a memory, the memory storing:

a control platform operable to utilize a predetermined time period associated with a group of packets, wherein the predetermined time period is reset for the group of packets when an acknowledgement signal is received;

the control platform further operable to examine stored packets to detect new or negatively acknowledged packets;

the control platform further operable to examine stored packets to detect a last transmitted packet;

a transmission platform operable to transmit the last transmitted packet from among the stored packets after the predetermined time period expires when no new or negatively acknowledged packets are detected if the last transmitted packet is detected and

further operable to transmit an earliest transmitted packet after the predetermined time period expires when no new or negatively acknowledged packets are detected if the last transmitted packet is not detected.

2. The device of claim 1, wherein the earliest transmitted packet comprises a signal operable to request an acknowledgement signal.

3. The device of claim 1, wherein the control platform is further operable to generate the predetermined time period when the earliest transmitted packet is transmitted.

4. The device of claim 1, wherein the control platform is further operable to generate the predetermined time period by utilizing an RLC protocol Poll Timer.

5. The device of claim 1, further comprising a reception unit operable to receive at least one acknowledgement signal.

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

7. The device of claim 1, wherein the last transmitted packet comprises a signal operable to request an acknowledgement signal.

8. The device of claim 1, wherein the control platform is further operable to retain the last transmitted packet.

9. The device of claim 1, wherein the control platform is further operable to generate the predetermined time period when the last transmitted packet is transmitted.

10. A method for preventing protocol stalling, comprising:

generating a predetermined time period associated with a group of packets, wherein the predetermined time period is reset for the group of packets when an acknowledgement signal is received,

examining stored packets to detect new or negatively acknowledged packets and to detect a last transmitted packet;

transmitting the last transmitted packet from among the stored packets after the predetermined time period expires when no new or negatively acknowledged packets are detected if the last transmitted packet is detected and

further transmitting an earliest transmitted packet after the predetermined time period expires when no new or negatively acknowledged packets are detected if the last transmitted packet is not detected.

11. The method of claim 10, wherein the earliest transmitted packet comprises a signal operable to request an acknowledgement signal.

12. The method of claim 10, wherein the predetermined time period is generated when the earliest transmitted packet is transmitted.

13. The method of claim 10, further comprising generating the predetermined time period by utilizing an RLC protocol Poll Timer.

14. The method of claim 10, further comprising receiving at least one acknowledgement signal.

15. The method of claim 10, wherein the last transmitted packet comprises a signal operable to request an acknowledgement signal.

16. The method of claim 10, further comprising retaining the last transmitted packet.

17. The method of claim 10, wherein the predetermined time period is generated when the last transmitted packet is transmitted.