Communication navigation system and server apparatus and terminal apparatus therefor, communication navigation method and communication navigation program

• US 6,954,694 B2
• Filed: 09/10/2002
• Issued: 10/11/2005
• Est. Priority Date: 09/10/2001
• Status: Expired due to Fees

• Current Assignee: Increment P Corporation (Pioneer Corporation), Pioneer Corporation
• Original Assignee: Increment P Corporation (Pioneer Corporation), Pioneer Corporation
• Inventors: Nagamune, Akira
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): To, Tuan C
• Application Number:
  US10/237,973
• Publication Number:
  US 20030083851A1
• Time in Patent Office: 1,127 Days
• Field of Search: 701/200, 701/202, 701/208, 701/211, 701/207, 701/213, 701/210, 340/5.61, 340/5.21, 340/5.72, 340/5.64, 340/995, 340/990, 340/988, 455/575.7, 455/11.1, 455/95, 455/515, 342/357.1, 342/357.09, 342/357.13, 342/419
• US Class Current: 701/200
• CPC Class Codes: G01C 21/3667 Display of a road map G01C21/3614 takes precedence; guidance using 3D or perspective road maps G01C21/3635
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G08G 1/096811 where the route is computed offboard

Abstract

A server apparatus divides map data into a plurality of block data to add identification information to each block data, and sends each block data to a terminal apparatus. The terminal apparatus identifies data for each block data sent from the server apparatus and, when uncompleted block data is detected, sends retransmission request information, which requests only the uncompleted block data to be sent to the terminal apparatus, to the server apparatus.

Claims

1. A communication navigation system that includes a terminal apparatus for receiving navigation information sent from a server apparatus while moving with a mobile body and the server apparatus for sending the navigation information to the terminal apparatus, and performs navigation of the mobile body while exchanging the navigation information between the server apparatus and the terminal apparatus,

wherein the navigation information comprises a plurality of pieces of block data and each piece of the block data has identification information indicating discrimination from the other pieces of block data, and

the communication navigation system comprises:

a detecting device for detecting whether or not exchange of the navigation information is suspended;

an extracting device for extracting block data for which exchange of navigation data is uncompleted when it is detected that exchange of the navigation information is suspended; and

a resuming device for resuming exchange of the navigation information from exchange of the extracted block data.

2. The communication navigation system according to claim 1,

wherein the identification information has at least one of information of the number of blocks to be sent and information indicating an order of transmission of blocks.

3. The communication navigation system according to claim 1,

wherein the navigation information has at least map data.

4. The communication navigation system according to claim 3,

wherein the navigation information comprises the map data, and

divided block data is data for each display element to be displayed in a map.

5. The communication navigation system according to claim 1,

wherein at leas one of the detecting device and the extracting device is provided in the terminal apparatus.

6. A terminal apparatus in a communication navigation system that includes the terminal apparatus for receiving navigation information sent from a server apparatus while moving with a mobile body and the server apparatus for sending the navigation information to the terminal apparatus, and performs navigation of the mobile body while exchanging the navigation information between the server apparatus and the terminal apparatus,

wherein the navigation information comprises a plurality of pieces of block data and each piece of the block data has identification information indicating discrimination from the other pieces of block data, and

the communication navigation system comprises:

a detecting device for detecting whether or not exchange of the navigation information is suspended;

an extracting device for extracting block data for which exchange of navigation data is uncompleted when it is detected that exchange of the navigation information is suspended; and

a retransmission requesting device for requesting retransmission of only the uncompleted navigation information based on the extracted block data.

7. The terminal apparatus in the communication navigation system according to claim 6,

wherein the extracting device extracts the uncompleted block data by obtaining at least one of information of the number of blocks to be sent to the identification information and information indicating an order of transmission of blocks.

8. A server apparatus in a communication navigation system that includes a terminal apparatus for receiving navigation information sent from a server apparatus while moving with a mobile body and the server apparatus for sending the navigation information to the terminal apparatus, and performs navigation of the mobile body while exchanging the navigation information between the server apparatus and the terminal apparatus,

wherein the navigation information comprises a plurality of pieces of block data and each piece of the block data has identification information indicating discrimination from the other pieces of block data, and

the communication navigation system comprises:

an adding device for adding the identification information to each block data;

a transmission device for sending the block data added with the identification information for each block data; and

a receiving device for receiving retransmission request information sent from the terminal apparatus to the effect that uncompleted block data is resent,

wherein the transmission device sends only the uncompleted block data to the terminal apparatus when the transmission device receives the retransmission request information.

9. The server apparatus in the communication navigation system according to claim 8,

wherein the identification information has at least one of information of the number of blocks to be sent and information indicating an order of transmission of blocks, and

the adding device adds either of the information of the number of blocks or the information of an order of transmission of blocks to each block data.

10. A communication navigation method for performing navigation of a mobile body by performing transmission and reception of navigation information to and from a server apparatus,

wherein the navigation information comprises a plurality of pieces of block data and each piece of block data has identification information indicating discrimination from the other pieces of block data, and

the communication navigation method comprises:

a detection process for detecting whether or not exchange of the navigation information is suspended;

an extraction process for extracting block data for which exchange of navigation data is uncompleted when it is detected that exchange of the navigation information is suspended; and

a retransmission request process for requesting retransmission of the uncompleted navigation information based on the extracted block data.

11. The communication navigation method according to claim 10,

wherein, in the extraction process, at least one of the information of the number of blocks to be sent and the information indicating an order of transmission of blocks is obtained, whereby the uncompleted block data is extracted.

12. A communication navigation method for performing navigation of a mobile body by performing transmission and reception of navigation information to and from a server apparatus,

wherein the navigation information comprises a plurality of pieces of block data and each piece of block data has identification information indicating discrimination from the other pieces of block data, and

the communication navigation method comprises:

an addition process for adding the identification information to each block data;

a transmission process for sending the block data added with identification information for each block data;

a reception process for receiving retransmission request information sent from the terminal apparatus to the effect that uncompleted block data is resent; and

a retransmission process for sending only the uncompleted block data to the terminal apparatus when the retransmission request information is received.

13. The communication navigation method according to claim 12,

wherein the identification information has at least one of information of the number of blocks to be sent and information indicating an order of transmission of blocks, and

wherein, in the addition process, either of the information of the number of blocks or the information of an order of transmission of blocks is added to each block data.

14. A communication navigation program, embodied in a recording medium, for performing transmission and reception of navigation information to and from a server apparatus and performing navigation of a mobile body by a computer,

wherein the navigation information comprises a plurality of pieces of block data and each piece of block data has identification information indicating discrimination from the other pieces of block data, and

the communication navigation program causes the computer to function as:

a detecting device for detecting whether or not exchange of the navigation information is suspended;

an extracting device for extracting block data for which exchange of navigation data is uncompleted when it is detected that exchange of the navigation information is suspended; and

a retransmission requesting device for requesting retransmission of only the uncompleted navigation information based on the extracted block data.

15. The communication navigation program according to claim 14,

wherein the communication navigation program causes the computer to function as the extracting device for extracting the uncompleted block data by obtaining at least one of information of the number of blocks to be sent and information indicating an order of transmission of blocks.

16. A communication navigation program, embodied in a recording medium, for performing transmission and reception of navigation information to and from a terminal apparatus moving with a mobile body and performing navigation of the mobile body by a computer,

wherein the navigation information comprises a plurality of pieces of block data and each piece of block data has identification information indicating discrimination from the other pieces of block data, and

the communication navigation program causes the computer to function as:

an adding device for adding the identification information to each block data;

a transmission device for sending the block data added with the identification information for each block data; and

a receiving device for receiving retransmission request information sent from the terminal apparatus to the effect that uncompleted block data is resent,

wherein the transmission device sends only the uncompleted block data to the terminal apparatus when the transmission device receives the retransmission request information.

17. The communication navigation program according to claim 16,

wherein the identification information has at least one of information of the number of blocks to be sent and information indicating an order of transmission of blocks, and

wherein the navigation program causes the computer to function as an adding device for adding either of the information of the number of blocks or the information indicating an order of transmission of blocks to each block data.