Terminal apparatus mounted on a vehicle to perform vehicle-to-vehicle communication

• US 8,884,781 B2
• Filed: 06/06/2012
• Issued: 11/11/2014
• Est. Priority Date: 05/31/2010
• Status: Expired due to Fees

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Yuse, Yoshio, Nagai, Makoto, Yorifuji, Yuki
• Primary Examiner(s): Nguyen, Hung T.
• Application Number:
  US13/489,873
• Publication Number:
  US 20120268295A1
• Time in Patent Office: 888 Days
• Field of Search: 340/905, 340/990, 340/995.13, 340/435, 340/436, 340/902, 701/22, 701/23, 701/207, 701/209, 701/301, 701/411, 701/36, 701/116, 701/45, 701/117
• US Class Current: 340/905
• CPC Class Codes: G01C 21/3691 Retrieval, searching and output of information related to real-time traffic, weather, or environmental conditions arrangements for giving variable traffic instructions G08G1/09
• CPC Class Codes: G08G 1/0104 Measuring and analyzing of parameters relative to traffic conditions

Abstract

A map data storage unit holds map data in which a road ID is allocated, as identification information, to every preset section of at least part of roads. A traffic jam determination unit determines whether the section corresponding to every road ID is congested. A transmission unit performs broadcast transmission of vehicle data including a road ID and the traveling speed of a vehicle from the vehicle traveling in each section of a road. At the time, the transmission unit forms a frame in which the received vehicle data of other vehicle and the vehicle data of a driver'"'"'s vehicle are combined. An information compressing unit compresses an amount of data by deleting the traveling speed from the frame with respect to a section that has been determined not to be congested by the traffic jam determination unit.

Claims

1. A terminal apparatus to be mounted on a vehicle to perform vehicle-to-vehicle communication, comprising:

a transmission unit configured to form and transmit a frame in which vehicle data received from a terminal apparatus mounted on other vehicle and vehicle data of a driver'"'"'s vehicle are combined, the vehicle data of the driver'"'"'s vehicle including both a road ID of a road on which the driver'"'"'s vehicle is traveling and traveling speed, by referring to map data in which a road ID is allocated, as identification information, to every preset section of at least part of roads;

a traffic jam determination unit configured to determine whether the section corresponding to the every road ID is congested; and

an information compressing unit configured to delete traveling speed from the frame with respect to a section that has been determined not to be congested by the traffic jam determination unit.

2. The terminal apparatus according to claim 1, wherein,

when the section in which the driver'"'"'s vehicle is traveling is determined not to be congested by the traffic jam determination unit, the information compressing unit deletes the traveling speed from the vehicle data of the driver'"'"'s vehicle of which the frame is composed.

3. The terminal apparatus according to claim 1, wherein,

when the section in which other vehicle is traveling is determined not to be congested by the traffic jam determination unit, the information compressing unit deletes the traveling speed from the vehicle data of the other vehicle of which the frame is composed.

4. The terminal apparatus according to claim 1, wherein

the transmission unit integrates vehicle data each having the same road ID, the vehicle data being received from a plurality of other vehicles, into one piece of data.

5. The terminal apparatus according to claim 1, wherein

the at least part of roads includes a road having a predetermined or larger width or a road having the predetermined number or more of passing vehicles per unit time.

6. The terminal apparatus according to claim 1, wherein

when a plurality of pieces of vehicle data each including the same road ID are received from other vehicles, the traffic jam determination unit determines presence or absence of a traffic jam by performing statistical processing of the traveling speed included in the plurality of pieces of vehicle data to calculate single traveling speed for every road ID.

7. The terminal apparatus according to claim 6, wherein,

when traveling speed are not included in the received vehicle data of other vehicles, the traffic jam determination unit allots traveling speed that have been set in advance to the road ID included in the vehicle data to perform the statistical processing.