Systems and methods for facilitating efficient vertical handoffs in a wireless communication system

• US 9,615,305 B2
• Filed: 03/03/2015
• Issued: 04/04/2017
• Est. Priority Date: 04/07/2011
• Status: Active Grant

• Current Assignee: Novatel Wireless, Inc. (Inseego Corp.)
• Original Assignee: Novatel Wireless, Inc. (Inseego Corp.)
• Inventors: Souissi, Slim, Wu, John, Kim, Brad
• Primary Examiner(s): Ly, Nghi H
• Application Number:
  US14/637,307
• Publication Number:
  US 20150282038A1
• Time in Patent Office: 763 Days
• Field of Search: 455440, 455436, 455442, 4554351, 4554321, 455422, 455419, 455434, 455441, 455426, 4554221, 370331
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems and methods are provided for performing efficient vertical handoffs in a wireless user device are provided. The user device can comprise a mobile phone, computer table, handheld computer, or other computer system capable of connecting to more than one mobile wireless network that use different wireless communication protocols. Various efficient scanning methods are disclosed that are efficient in terms of battery usage, thermal performance, processing power, throughput performance, or a combination thereof.

Claims

1. A method for managing network connectivity of a wireless device from a remote server, the wireless device being connected to a first wireless network and configured to scan for a signal of a second wireless network, the first wireless network and the second wireless network being configured to operate using different wireless communication protocols, the server being configured to perform the method comprising:

determining the location of a the wireless device,

accessing coverage map information that indicates where coverage for the second wireless network is available,

comparing the location information to coverage map information that indicates where coverage for a second wireless network is available, and

sending a network search command to the user device to scan for a signal of the second wireless network and to initiate a vertical handoff from the first network to the second network if the signal from the second wireless network is detected.

2. The method of claim 1, where in determining the location of the wireless device further comprises determining a serving cell identifier associated with a base station providing wireless service to the wireless device.

3. The method of claim 1, wherein determining the location of the wireless device further comprises:

sending a location information request to the wireless device requesting that the wireless device provide location information; and

receiving a location information response from the wireless device that includes location information for the wireless device.

4. The method of claim 3 wherein the location information response includes a serving cell identifier associated with a base station providing wireless service to the wireless device.

5. The method of claim 3 wherein the location information response includes geographical coordinates associated with the location of the user device.

6. The method of claim 3 wherein the location information response includes at least one of rate of motion and direction of motion of the user device.