NAVIGATION DEVICE AND NAVIGATION SYSTEM

• US 20090092042A1
• Filed: 10/03/2008
• Published: 04/09/2009
• Est. Priority Date: 10/05/2007
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Yuhara, Hiromitsu, Furukawa, Hedio
• Granted Patent: US 8,306,548 B2
• Time in Patent Office: Days
• US Class Current: 370/216
• CPC Class Codes: H04L 41/08 Configuration management of networks or network elements address allocation H04L61/50

Abstract

The present invention provides a navigation device which performs communication with an information-providing server device. The navigation device (3) includes a communication section (11) which transmits a message to the server device for a response confirmation, and receives a response message with respect to the message from the server device; a response value obtaining section (12) which determines a time duration from a time when the message is transmitted to another time when the response message is received, and obtains a response value indicating a communication state in relation to a communication time on the basis of the determined time duration; and a communication-parameter setting section (13) which determines an optimal communication parameter on the basis of the response value obtained by the response value obtaining device, and sets the optimal communication parameter in a communication parameter in relation to a communication disconnection condition used in the navigation device (3).

Claims

1. A navigation device which performs communication with an information-providing server device, comprising:

a communication section which transmits a message to the server device for a response confirmation, and receives a response message with respect to the message from the server device;

a response value obtaining section which determines a time duration from a time when the message is transmitted to another time when the response message is received, and obtains a response value indicating a communication state in relation to a communication time on the basis of the determined time duration; and

a communication-parameter setting section which determines an optimal communication parameter on the basis of the response value obtained by the response value obtaining device, and sets the optimal communication parameter in a communication parameter in relation to a communication disconnection condition used in the navigation device.

2. The navigation device according to claim 1, wherein the communication parameter includes at least one of a time-out value for determining the communication disconnection and a retry number of times after the communication disconnection.

3. A navigation system having a navigation device which has mobility or is mounted in a functional device carried by a user, and a server device which provides information to the navigation device via communication,

wherein the navigation device includes

a communication section which transmits a message to the server device for a response confirmation, and receives a response message with respect to the message from the server device;

a response value obtaining section which determines a time duration from a time when the message is transmitted to another time when the response message is received, and obtains a response value indicating a communication state in relation to a communication time on the basis of the determined time duration; and

a communication-parameter setting section which determines an optimal communication parameter on the basis of the response value obtained by the response value obtaining device, and sets the optimal communication parameter in a communication parameter in relation to a communication disconnection condition used in the navigation device,

wherein the server device includes

a second communication section which transmits the response message in response to the receiving of the message transmitted from the navigation device.

4. The navigation system according to claim 3, wherein

the communication section of the navigation device transmits the response value obtained by the response value obtaining section to the server device;

the second communication section of the server device receives the response value transmitted by the navigation device; and

the sever device includes a second communication parameter setting section which determines a second optimal communication parameter on the basis of the response value received by the second communication section, and sets the second optimal communication parameter in a second communication parameter in relation to a data transmitting condition used in the server device.