Method and System for Efficient Utilization of Transmission Resources in a Wireless Network

• US 20060251081A1
• Filed: 07/03/2006
• Published: 11/09/2006
• Est. Priority Date: 04/19/2001
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Choksi, Ojas T.
• Granted Patent: US 7,724,725 B2
• Time in Patent Office: Days
• US Class Current: 370/394
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions

Abstract

A method and system for efficient utilization of transmission resources in a wireless network includes requesting retransmission of an unsuccessfully received radio frame up to an allowed number of times. In response to at least unsuccessfully receiving the frame from the allowed number of retransmissions, a signal is generated for transmission to a device transmitting the frame. The signal is operable to prevent the device from transmitting a set of remaining frames for a packet to which the frame belongs.

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28. A method for efficient utilization of transmission resources in a wireless network, comprising:

in response to at least unsuccessfully receiving a radio frame for a packet from a wireless link, requesting retransmission of the frame up to an allowed number of retransmissions;

determining a position of the frame in a set of related frames for the packet, wherein a sequence number corresponds to the position of the frame;

determining the allowed number of retransmissions for the frame based on the position of the frame in the set of related frames; and

in response to at least unsuccessfully receiving the frame from the allowed number of retransmissions, generating a signal for transmission to a device transmitting the frame, the signal operable to prevent the device from transmitting a set of remaining frames for the packet.

29. The method of claim 28, wherein the signal comprises a bitmap identifying the frame and identifying a disparate frame for retransmission.

30. The method of claim 28, wherein the radio frame identifies the packet and the signal for transmission to the device transmitting the frame identifies the packet.

31. The method of claim 28, wherein the set of related frames comprises all frames for the packet.

32. The method of claim 28, wherein the set of related frames comprises a set of successfully received frames for the packet.

33. The method of claim 28, wherein the signal for transmission to the device transmitting the frame is operable to prevent the device from transmitting the set of remaining frames by causing the device to drop the set of remaining frames.

34. A system for efficient utilization of transmission resources in a wireless network, comprising:

means, in response to at least unsuccessfully receiving a radio frame for a packet from a wireless link, for requesting retransmission of the frame up to an allowed number of retransmissions;

means for determining a position of the frame in a set of related frames for the packet, wherein a sequence number corresponds to the position of the frame;

means for determining the allowed number of retransmissions for the frame based on the position of the frame in the set of related frames; and

means, in response to at least unsuccessfully receiving the frame from the allowed number of retransmissions, for generating a signal for transmission to a device transmitting the frame, the signal operable to prevent the device from transmitting a set of remaining frames for the packet.

35. The system of claim 34, wherein the signal comprises a bitmap identifying the frame and identifying a disparate frame for retransmission.

36. The system of claim 34, wherein the radio frame identifies the packet and the signal for transmission to the device transmitting the frame identifies the packet.

37. The system of claim 34, wherein the set of related frames comprises all frames for the packet.

38. The system of claim 34, wherein the set of related frames comprises a set of successfully received frames for the packet.

39. The system of claim 34, wherein the signal for transmission to the device transmitting the frame is operable to prevent the device from transmitting the set of remaining frames by causing the device to drop the set of remaining frames.

40. A system for efficient utilization of transmission resources in a wireless network, comprising:

logic encoded in media; and

the logic operable to;

request retransmission of an unsuccessfully received radio frame up to an allowed number of retransmissions;

determine a position of the frame in a set of related frames for the packet, wherein a sequence number corresponds to the position of the frame;

determine the allowed number of retransmissions for the frame based on the position of the frame in the set of related frames; and

in response to at least unsuccessfully receiving the frame from the allowed number of retransmissions, generate a signal for transmission to a device transmitting the frame, the signal operable to prevent the device from transmitting a set of remaining frames for a packet to which the frame belongs.

41. The system of claim 40, wherein the signal comprises a bitmap identifying the frame and identifying a disparate frame for retransmission.

42. The system of claim 40, wherein the radio frame identifies the packet and the signal for transmission to the device transmitting the frame identifies the packet.

43. The system of claim 40, wherein the set of related frames comprises all frames for the packet.

44. The system of claim 40, wherein the set of related frames comprises a set of successfully received frames for the packet.

45. The system of claim 40, wherein the signal for transmission to the device transmitting the frame is operable to prevent the device from transmitting the set of remaining frames by causing the device to drop the set of remaining frames.

46. A network element for a wireless network, comprising:

logic encoded in media; and

the logic operable to drop a set of remaining frames for a packet identified by a receiving device as having a frame unsuccessfully received after an allowed number of retransmissions, wherein the allowed number of retransmissions is based on the position of the frame in a set of related frames, and the allowed number of retransmissions for the frame increases as the sequence number corresponding to the position of the frame in the set of related frames increases.