WIRELESS DEVICE, COMMUNICATION METHOD AND COMPUTER READABLE STORAGE MEDIUM

• US 20170265159A1
• Filed: 12/20/2016
• Published: 09/14/2017
• Est. Priority Date: 03/11/2016
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: KASAMI, Hideo
• Application Number:
  US15/385,689
• Publication Number:
  US 20170265159A1
• Time in Patent Office: Days
• CPC Class Codes: G08G 1/163 involving continuous checking
• CPC Class Codes: H04B 1/3822 specially adapted for use in vehicles H04B1/3827 takes precedence
• 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 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/46 for vehicle-to-vehicle communication [V2V]
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/0025 synchronizing potentially movable access points
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

According to one embodiment, a wireless device provided in a traveling apparatus, includes a processor configured to evaluate accuracy of time synchronization in the traveling apparatus and a transmitter configured to transmit a frame including information on the traveling apparatus at a first frequency when the accuracy corresponds to a first quality and transmit the frame at a second frequency higher than the first frequency when the accuracy corresponds to a second quality lower than the first quality.

Claims

1. A wireless device provided in a traveling apparatus, comprising:

a processor configured to evaluate accuracy of time synchronization in the traveling apparatus; and

a transmitter configured to transmit a frame including information on the traveling apparatus at a first frequency when the accuracy corresponds to a first quality and transmit the frame at a second frequency higher than the first frequency when the accuracy corresponds to a second quality lower than the first quality.

2. The wireless device of claim 1, wherein the processor is configured to calculate the first frequency based on a speed or a travel amount of the traveling apparatus.

3. The wireless device of claim 1, wherein the processor is configured to acquire setting information via an external interface and calculate the second frequency based on the setting information.

4. The wireless device of claim 1, wherein the accuracy of the time synchronization is time synchronization accuracy of a GPS (Global Positioning System) receiver in provided in the traveling apparatus, the GPS receiver being configured to receive a GPS signal to perform the time synchronization,

wherein the processor is configured to evaluate the accuracy of the time synchronization based on output information of the GPS receiver.

5. The wireless device of claim 4, wherein the processor is configured to compare the output information of the GPS receiver with a threshold value to determine the first quality or the second quality.

6. The wireless device of claim 5, wherein the output information of the GPS receiver includes information on received strength of the GPS signal,

wherein the processor is configured to compare the received strength with the threshold value.

7. The wireless device of claim 1 wherein the processor is configured to calculate the first frequency based on a speed or a travelling amount of the traveling apparatus;

the processor is configured to acquire setting information via an external interface and calculate the second frequency based on the setting information; and

the processor is configured to generate a first transmission trigger at the first frequency,

the processor is configured to generate a second transmission trigger at the second frequency,

the processor is configured to select the first transmission trigger when the accuracy corresponds to the first quality and select the second transmission trigger when the accuracy corresponds to the second quality, and generate a transmission instruction signal in accordance with selection of the first or the second transmission trigger, and

the transmitter is configured to transmit the frame based on the transmission instruction signal.

8. The wireless device of claim 1 further comprising a receiver configured to perform carrier sensing on a wireless medium,

wherein the transmitter is configured to transmit the frame when the wireless medium is an idle state.

9. The wireless device of claim 1, further comprising at least one antenna.

10. A communication method performed in a traveling apparatus, comprising:

estimating accuracy of time synchronization in the traveling apparatus; and

transmitting a frame including information on the traveling apparatus at a first frequency when the accuracy corresponds to a first quality and transmit the frame at a second frequency higher than the first frequency when the accuracy corresponds to a second quality lower than the first quality.

11. The method of claim 10 further comprising calculating the first frequency based on a speed or a travel amount of the traveling apparatus.

12. The method of claim 10 further comprising acquiring setting information via an external interface and calculate the second frequency based on the setting information.

13. The method of claim 10, wherein the accuracy of the time synchronization is time synchronization accuracy of a GPS receiver in provided in the traveling apparatus, the GPS receiver being configured to receive a GPS signal to perform the time synchronization,

wherein the accuracy of the time synchronization is evaluated based on output information of the GPS receiver.

14. The wireless device of claim 13, further comparing the output information of the GPS receiver with a threshold value to determine the first quality or the second quality.

15. The method of claim 14, wherein the output information of the GPS receiver includes information on received strength of the GPS signal,

wherein the received strength is compared with the threshold value.

16. The method of claim 10 further comprising:

calculating the first frequency based on a speed or a travelling amount of the traveling apparatus;

acquiring setting information via an external interface and calculate the second frequency based on the setting information;

generating a first transmission trigger at the first frequency;

generating a second transmission trigger at the second frequency;

selecting the first transmission trigger when the accuracy corresponds to the first quality and selecting the second transmission trigger when the accuracy corresponds to the second quality, and generate a transmission instruction signal in accordance with selection of the first or the second transmission trigger; and

transmitting the frame based on the transmission instruction signal.

17. The method of claim 10, further comprising performing carrier sensing on a wireless medium,

wherein the frame is transmitted when the wireless medium is an idle state.

18. A non-transitory computer readable storage medium having a program stored therein which causes, when executed by a computer provided in a traveling apparatus, to perform processes of steps comprising:

estimating accuracy of time synchronization in the traveling apparatus; and

transmitting a frame including information on the traveling apparatus at a first frequency when the accuracy corresponds to a first quality and transmit the frame at a second frequency higher than the first frequency when the accuracy corresponds to a second quality lower than the first quality.