POLLING BETWEEN WIRELESS DEVICE AND VEHICLE TRANSCEIVERS

• US 20150296348A1
• Filed: 03/31/2015
• Published: 10/15/2015
• Est. Priority Date: 04/14/2014
• Status: Abandoned Application

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: GHABRA, Riad
• Application Number:
  US14/674,212
• Publication Number:
  US 20150296348A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Polling methods and systems are described to allow a wireless device to establish communication with a base, e.g., a vehicle, in an efficient manner. The polling signal includes a plurality of time separated, polling transmission signals and a single receive time period. The polling transmission signals are separated by a non-transmission time period that is greater than a transmission time of the time separated transmission signals. The polling scheme can be repeated the polling signal until a poll response signal from the base is received. Energy savings for the wireless device are provided by limiting the number of receive actions and time periods in the wireless device.

Claims

1. A wireless, polling device for communicating with a vehicle comprising:

a controller to produce a polling signal with a transmission period, a receive period and a sleep period with the sleep period being longer than the transmission period and receive period combined and the transmission period and sleep period together being longer than a receive period of a vehicle; and

a transceiver connected to the controller and configured to transmit the polling signal from the device or to receive a vehicle signal at the device.

2. The device of claim 1, wherein the controller configured to produce the polling signal during a polling time period, wherein the polling signal includes a plurality of time separated, polling transmission signals and a receive time period,

wherein the polling transmission signals are separated by a non-transmission time period that is greater than a transmission time of the time separated transmission signals, and

wherein the controller repeats the polling signal until the controller receives a poll response signal from a vehicle.

3. The device of claim 2, wherein the receive time period is about the same as the transmission time period.

4. The device of claim 2, wherein the receive time period is a single receive time period after the plurality of the time separated, polling transmission signals.

5. The device of claim 4, wherein the non-transmission time period is greater than ten times the transmission time period.

6. The device of claim 5, wherein the transceiver is configured to transmit the polling signal at a frequency of greater than or equal to 2.4 GHz.

7. The device of claim 2, wherein the plurality of time separated transmission polling signals includes four or more transmission polling signals for each receive time period.

8. The device of claim 2, wherein the plurality of time separated transmission polling signals includes four or more transmission polling signals for each receive time period.

9. A short range polling system comprising:

a portable device including;

a controller to produce a polling signal with a transmission period, a receive period and a sleep period with the sleep period being longer than the transmission period and receive period combined and the transmission period and sleep period together being longer than a receive period of a vehicle, and

a transceiver connected to the controller and configured to transmit the polling signal from the device or to receive a vehicle signal at the device; and

a vehicle with a communication system configured to have a polling signal receive time period greater than a sum of a non-transmission, polling time period and the transmission time of the time separated transmission signals.

10. The system of claim 9, wherein the controller configured to produce the polling signal during a polling time period, wherein the polling signal includes a plurality of time separated, polling transmission signals and a receive time period,

wherein the polling transmission signals are separated by a non-transmission time period that is greater than a transmission time of the time separated transmission signals, and

wherein the controller repeats the polling signal until the controller receives a poll response signal from the vehicle.

11. The system of claim 10, wherein the receive time period is about a same time as the transmission time period.

12. The system of claim 11, wherein the controller determines position of the portable device relative to the vehicle after receiving signals from the vehicle.

13. The system of claim 9, wherein the vehicle includes a receive time off period that is less than or equal to twice a time period (T_packet-poll) of a single transmit time period and a single non-transmission, polling time period.

14. The system of claim 9, wherein the controller receives a response signal from the vehicle and enters a passive communication operation and ends the polling signal.

15. The system of claim 9, wherein the controller turns off the transceiver after a final polling signal of plurality of time separated, polling transmission signals for a first time off period and then turns the transceiver to a receive mode after the first time off period and wherein a passive communication operation begins after a second time off period.

16. The system of claim 15, wherein the second time off period is greater than the first time off period.

17. A wireless polling method between a base station and a mobile device, comprising:

transmitting a polling signal including a plurality of time separated, polling transmission signals and a final polling transmission signal that is at an end of the plurality of polling transmission signals;

monitoring for a poll response signal after transmitting the polling signal with a single receive period for each transmitting of the polling signal;

if the poll response is not received in the receive period, then waiting a first time period and thereafter transmitting the polling signal again; and

if the poll response is received in the receive period, then waiting a second time period and thereafter entering a passive communication mode.

18. The method of claim 17, wherein transmitting includes separating polling the transmission signals by a third time period that is greater than a transmission signal time period of the polling transmission signals.

19. The method of claim 18, wherein the third time period is ten times greater than the transmission signal time period.

20. The method of claim 17, wherein a vehicle includes a polling signal receive time period greater than a sum of the third time period and the transmission time of the transmission signal time period;

and wherein transmitting includes transmitting four or more transmission polling signals for each receive period.