Method for Performing Proactive Wireless Communication Handoffs Using a Mobile Client's Route Information

• US 20130223329A1
• Filed: 04/15/2013
• Published: 08/29/2013
• Est. Priority Date: 04/06/2009
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Jain, Vivek, Venkatraman, Lakshmi
• Granted Patent: US 9,144,002 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/324 by mobility data, e.g. speed data

Abstract

A method of handing off radio resources from a first base station to a second base station includes transmitting route information and speed information associated with a client device from the client device to the first base station or to an application server. A time is selected at which the radio resources are to be handed off from the first base station to the second base station. The selection is performed by the first base station or the application server. The selection is performed dependent upon the route information and speed information.

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28. A method of handing off radio resources from a first base station to a second base station, the method comprising the steps of:

transmitting route information and speed information associated with a client device from the client device to the first base station;

selecting a time at which the radio resources are to be handed off from the first base station to the second base station, the selecting being performed by the first base station, the selecting being performed dependent upon the route information and speed information;

using the first base station to continuously monitor an outgoing quality of service for an application running on the client device; and

using the first base station to respond to the quality of service falling below a threshold level by scanning for other base stations that are nearer to the client device.

29. The method of claim 28 comprising the further step of using the first base station to respond to the quality of service falling below a threshold level by requesting the route information and speed information from the client device.

30. The method of claim 28 wherein the selected time is a time at which the client device is expected to begin to have a better quality of service with the second base station than with the first base station.

31. The method of claim 28 comprising the further step, after the radio resources have been handed off from the first base station to the second base station, of using the second base station to instruct an application server to begin transmitting application data packets to only the second base station.

32. The method of claim 28 wherein the first base station performs authentication and reservation of the radio resources on behalf of the client device.

33. A method of handing off radio resources between base stations, the method comprising the steps of:

transmitting route information and speed information associated with a client device from the client device to an application server, the route information including a planned route from a navigation system;

choosing a second of the base stations to which the radio resources are to be handed off from a first of the base stations; and

selecting a time at which the radio resources are to be handed off from the first base station to the second base station, the choosing and selecting being performed by the application server, the choosing and selecting being performed dependent upon the route information and speed information.

34. The method of claim 33 comprising the further step of transmitting support information identifying wireless technologies supported by the client device, the support information being transmitted from the client device to the application server, the choosing step being dependent upon the support information.

35. The method of claim 33 comprising the further step of maintaining a list of the base stations and locations of the base stations, the list being maintained at the application server.

36. The method of claim 33 comprising the further step, before the radio resources are handed off from the first base station to the second base station, of providing the client device with radio resource information associated with the second base station.

37. The method of claim 36 wherein the radio resource information comprises at least one of a frequency slot, a code slot, a power level, a beacon, and a base station identification.

38. The method of claim 33 comprising the further step, before the radio resources are handed off from the first base station to the second base station, of using the second base station to reserve network resources for the client device.

39. A method of wirelessly communicating between an application server and a client device, the method comprising the steps of:

transmitting same data packets from the application server to each of a first base station and a second base station using their respective identifications;

each of the data packets further including a unique identification of the client device other than an IP address;

handing off radio resources associated with the client device from the first base station to the second base station, during the handoff data packets being transmitted simultaneously to both the base stations;

relaying the data packets from the first base station to the client device; and

relaying the data packets from the second base station to the client device.

40. The method of claim 39 comprising the further step of responding to the handing off step by informing the application server that the client device is within a network of the second base station.

41. The method of claim 40 wherein each of the data packets includes an IP address of whichever of the first base station and the second base station that the data packet is being transmitted to.

42. The method of claim 40 wherein the second base station performs the informing step, the method comprising the further step of responding to the informing step by transmitting data packets from the application server to only the second base station.

43. The method of claim 39 wherein the unique identification of the client device comprises a MAC address.

44. The method of claim 39 wherein the unique identification of the client device comprises a tuple including identification of wireless technologies supported by the client device.

45. The method of claim 39 wherein first ones of the data packets are relayed from the first base station to the client device, and second ones of the data packets are relayed from the second base station to the client device.

46. The method of claim 45 wherein the first ones of the data packets are different from the second ones of the data packets.

47. The method of claim 39 comprising the further step of using the client device to determine a location of the client device at which the handoff is to be initiated.

48. The method of claim 47 wherein the client device uses route information associated with the client device to make the determination, the route information including a planned route from a navigation system.

49. A method of handing off radio resources between base stations, the method comprising the steps of:

maintaining a list of supported base stations on a client device;

determining whether a quality of service at the client device exceeds a threshold level of quality; and

if the quality of service at the client device is below the threshold level of quality, then;

using the client device to choose a second of the base stations on the list to which the radio resources are to be handed off from a first of the base stations on the list; and

using the client device to determine a location of the client device at which the handoff is to be initiated, the client device using route information associated with the client device to make the determination, the route information including a planned route from a navigation system.

50. The method of claim 49 comprising the further step of using the client device to initiate a handoff of the radio resources from the first of the base stations on the list to the second of the base stations on the list.

51. The method of claim 50 wherein the initiation of the handoff is dependent upon the quality of service at the client device.

52. The method of claim 50 wherein, if the client device determines that a second said base station associated with a better quality of service than the first base station is not available, then the client device inhibits initiation of a handoff of the radio resources from the first of the base stations on the list to the second of the base stations on the list.

53. The method of claim 49 comprising the further step of the client device using a learning algorithm to learn over time which of the supported base stations on the list to connect to and when to connect to the supported base stations.

54. The method of claim 49 wherein the client device is communicatively connected to a plurality of base stations simultaneously.