Vehicle access point scanning for acquiring network access via an external access point

• US 10,015,257 B2
• Filed: 07/28/2016
• Issued: 07/03/2018
• Est. Priority Date: 07/28/2016
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Thanayankizil, Lakshmi V.
• Primary Examiner(s): Liao, Hsin-Chun
• Application Number:
  US15/222,575
• Publication Number:
  US 20180035245A1
• Time in Patent Office: 705 Days
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 4/44 for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 76/19 Connection re-establishment

Abstract

A method of operating a vehicle wireless access point (WAP), including the steps of establishing short range wireless communication between a vehicle WAP and one or more wireless devices over one or more corresponding communication channels operating over a first frequency band; suspending the communication between the vehicle WAP and the wireless device(s); scanning for another non-vehicle WAP using the first frequency band; connecting the vehicle WAP as a client device to the non-vehicle WAP; resuming the communication with at least some of the wireless device(s) over the wireless communication channel(s); and providing the wireless device(s) with data access to remote networks sequentially via both the vehicle WAP and the non-vehicle WAP.

Claims

1. A method of operating a vehicle wireless access point (WAP), comprising the steps of:

(a) establishing short range wireless communication between a vehicle WAP and one or more wireless devices over one or more corresponding wireless communication channels operating over a first frequency band;

(b) providing the wireless device(s) with data access to remote networks via the vehicle WAP using the wireless communication channel(s) and a network access device;

(c) detecting a non-vehicle WAP available for use in providing the wireless device(s) with the data access to remote networks, wherein the detecting is carried out by the steps of;

(c1) suspending the short range wireless communication with the wireless device(s) over the wireless communication channel(s);

(c2) scanning for another WAP using the first frequency band; and

(c3) determining that a non-vehicle WAP is available for short range wireless communication based on the scanning;

(d) connecting the vehicle WAP as a client device to the non-vehicle WAP via a wireless data connection between the vehicle WAP and the non-vehicle WAP;

(e) resuming the short range wireless communication with at least some of the wireless device(s) over the wireless communication channel(s);

(f) providing the wireless device(s) with the data access to remote networks that passes sequentially through both the vehicle WAP using the wireless communication channel(s) and the non-vehicle WAP using the data connection between the vehicle WAP and the non-vehicle WAP; and

(g) providing one or more other wireless devices with short range wireless communication from the vehicle WAP over communication channel(s) operating over a second frequency band during at least steps (c)-(e).

2. The method of claim 1, wherein the network access device comprises a vehicle telematics unit installed in the vehicle as a part of the vehicle electronics, wherein the telematics unit accesses remote networks via a data connection to a cellular carrier system, and wherein step (b) comprises providing the wireless device(s) with the data access to remote networks via the communication channel(s) between the wireless device(s) and the vehicle WAP, data communication between the vehicle WAP and the telematics unit, and the data connection between the vehicle telematics unit and the cellular carrier system.

3. The method of claim 1, wherein step (c) comprises detecting a non-vehicle WAP located in a building near the vehicle.

4. The method of claim 1, wherein the frequency band contains multiple wireless communication channels, and wherein step (c2) further comprises determining one or more wireless communication channels that are a part of the first frequency band and, subsequently, scanning on each of the one or more wireless communication channel(s).

5. The method of claim 4, wherein the scanning on each of the wireless communication channel(s) is carried out by passively or actively scanning one wireless communication channel at a time and, upon detecting a non-vehicle WAP, proceeding to step (c3).

6. The method of claim 5, wherein step (c2) comprises passively scanning for another WAP using the first frequency band, wherein passively scanning includes listening for a beacon frame sent by another WAP.

7. The method of claim 5, wherein step (c2) comprises actively scanning for another WAP using the first frequency band, wherein actively scanning includes transmitting a probe request.

8. The method of claim 7, further comprising the step of receiving a probe response from another WAP in response to the transmitted probe request and, in response to receiving the probe response, connecting to the non-vehicle WAP.

9. The method of claim 1, further comprising the step of storing an identifier of at least some of the wireless device(s) in memory and wherein step (e) comprises sending one or more messages with each of those wireless device(s) specified as a recipient over the first frequency band, wherein each of the messages indicates that the vehicle WAP is ready to resume communications with the wireless device that is specified as the recipient in the message.

11. The method of claim 1, wherein step (c1) comprises sending a clear-to-send (CTS) signal with a specified recipient contained therein, wherein the specified recipient is the vehicle WAP.

12. The method of claim 11, wherein step (e) further comprises sending an acknowledgement (ACK) signal corresponding to the CTS signal thereby resuming the short range wireless communications with at least some of the wireless device(s) over the wireless communications channel(s).

10. A method of operating a vehicle wireless access point (WAP), comprising the steps of:

(a) establishing short range wireless communication between a vehicle WAP and one or more wireless devices over one or more corresponding wireless communication channels operating over a first frequency band;

(b) providing the wireless device(s) with data access to remote networks via the vehicle WAP using the wireless communication channel(s) and a network access device;

(c) detecting a non-vehicle WAP available for use in providing the wireless device(s) with the data access to remote networks, wherein the detecting is carried out by the steps of;

(c1) suspending the short range wireless communication with the wireless device(s) over the wireless communication channel(s);

(c2) scanning for another WAP using the first frequency band; and

(c3) determining that a non-vehicle WAP is available for short range wireless communication based on the scanning;

(d) connecting the vehicle WAP as a client device to the non-vehicle WAP via a wireless data connection between the vehicle WAP and the non-vehicle WAP;

(e) resuming the short range wireless communication with at least some of the wireless device(s) over the wireless communication channel(s); and

(f) providing the wireless device(s) with the data access to remote networks that passes sequentially through both the vehicle WAP using the wireless communication channel(s) and the non-vehicle WAP using the data connection between the vehicle WAP and the non-vehicle WAP;

wherein the network access device is a first network access device and the non-vehicle WAP operates as a second network access device, wherein step (f) comprises providing the wireless device(s) with the data access to remote networks using the second network access device instead of the first network access device.

13. A method of operating a vehicle wireless access point (WAP) in a vehicle having vehicle electronics that include an installed vehicle WAP, wherein the method is carried out by the vehicle electronics and comprises:

(a) establishing short range wireless communication (SRWC) at the vehicle between the installed vehicle WAP and one or more wireless devices located at the vehicle, wherein the SRWC uses a first frequency band;

(b) suspending the SRWC with the one or more wireless devices over the first frequency band;

(c) scanning for a second WAP;

(d) detecting the second WAP;

(e) establishing a data connection using SRWC with the second WAP;

(f) resuming the short range wireless communication between the first WAP and the one or more wireless devices over the first frequency band;

(g) providing remote network access to the one or more wireless devices by passing data communications between the remote network and one or more wireless devices sequentially through both the first and second WAPs; and

(h) providing one or more other wireless devices with short range wireless communication from the installed vehicle WAP over communication channel(s) operating over a second frequency band during at least steps (b)-(f).