Method for exchanging messages in a navigation system using visible light communications

Abstract

Method and device for exchanging messages in a VLC navigation system is provided, in which a map server generates a provision message in the form of visible light signals through all lamps in an area, using a PLC network, where a navigation service is provided, a terminal that wants to implement the navigation service among terminals that have received the provision message transmits a registration request message to the map server, the map server transmits a registration response message for the registration request message to the terminal, the terminal transmits a map request message including information about a destination to the map server, the map server transmits a map response message including information about a path to the destination to the terminal, and the terminal displays map information and the path.

1 . A method for exchanging messages in a Visible Light Communication (VLC) navigation system, comprising:
 generating a provision message in the form of visible light signals through each of a plurality of lamps in an area where a navigation service is provided by a map server;   transmitting a registration request message to the map server by a terminal that wants to implement the navigation service among terminals that have received the provision message;   transmitting a registration response message for the registration request message to the terminal by the map server;   transmitting a map request message including information about a destination to the map server by the terminal;   transmitting a map response message including information about a path to the destination to the terminal by the map server; and   displaying map information and the path by the terminal.   
     
     
         2 . The method of  claim 1 , further comprising transmitting lamp Identifier (ID) messages to all lamps positioned along a path in which the terminal moves by the map server. 
     
     
         3 . The method of  claim 2 , wherein each of the lamp ID messages includes a terminal ID and a lamp ID. 
     
     
         4 . The method of  claim 1 , wherein the provision message includes a terminal ID, a building ID, a version of data that can be changed during operation of the VLC navigation system, and a destination list. 
     
     
         5 . The method of  claim 4 , wherein the terminal ID is a predetermined broadcasting ID in the provision message. 
     
     
         6 . The method of  claim 1 , wherein the registration request message includes a terminal ID and a building ID. 
     
     
         7 . The method of  claim 1 , wherein the registration response message includes a terminal ID, a building ID, map information. 
     
     
         8 . The method of  claim 7 , wherein the map information is about a map of an area where the terminal is located in the registration response message. 
     
     
         9 . The method of  claim 1 , wherein the map request message includes a terminal ID, a building ID, a version of data that can be changed during operation of the VLC navigation system, and the destination information. 
     
     
         10 . The method of  claim 1 , wherein the map response message includes a terminal ID, a lamp ID, a version of data that can be changed during operation of the VLC navigation system, the map information, and the optimum path information. 
     
     
         11 . The method of  claim 10 , wherein the map information is about an entire map covering a current location of the terminal to the destination in the map response message. 
     
     
         12 . A method for exchanging messages in a Visible Light Communication (VLC) navigation system, comprising:
 generating a provision message in the form of visible light signals through all lamps in an area where a navigation service is provided by a map server;   transmitting a registration request message to the map server by a terminal that wants to implement the navigation service among terminals that have received the provision message;   transmitting a registration response message for the registration request message to the terminal by the map server;   transmitting a map request message including information about a destination to the map server by the terminal;   transmitting a map response message including information about an optimum path to the destination to the terminal, separately in a plurality of messages, each message including a predetermined data amount by the map server; and   displaying map information and the optimum path by the terminal.   
     
     
         13 . The method of  claim 12 , further comprising transmitting lamp Identifier (ID) messages to all lamps positioned along a path in which the terminal moves by the map server. 
     
     
         14 . The method of  claim 13 , wherein each of the lamp ID messages includes a terminal ID and a lamp ID. 
     
     
         15 . The method of  claim 13 , further comprising transmitting a current location report message every predetermined period to the map server by the terminal. 
     
     
         16 . The method of  claim 15 , wherein the current location report message includes a terminal ID and a lamp ID. 
     
     
         17 . The method of  claim 12 , wherein the provision message includes a terminal ID, a building ID, a version of data that can be changed during operation of the VLC navigation system, and a list of a plurality of sections each having a predetermined size into which an entire area of a building is divided. 
     
     
         18 . The method of  claim 17 , wherein the terminal ID is a predetermined broadcasting ID in the provision message. 
     
     
         19 . The method of  claim 12 , wherein the registration request message includes a terminal ID, a building ID, an ID of a lamp corresponding to a current area of the terminal, and an ID of a current section of the terminal. 
     
     
         20 . The method of  claim 12 , wherein the registration response message includes a terminal ID, a building ID, a version of data that can be changed during operation of the VLC navigation system, information about an entire map of a current section of the terminal, and map information about a current area of the terminal. 
     
     
         21 . The method of  claim 12 , wherein the map request message includes a terminal ID, a building ID, a version of data that can be changed during operation of the VLC navigation system, and the destination information. 
     
     
         22 . The method of  claim 12 , wherein the map response message includes a terminal ID, an ID of a lamp corresponding to a current area of the terminal, the map information, and the optimum path information. 
     
     
         23 . The method of  claim 22 , wherein the map information is about an entire map covering a current location of the terminal to the destination in the map response message. 
     
     
         24 . A mobile terminal including at least a VLC communication system comprising:
 a processor in communication with a memory, the memory including code which when accessed by the processor causes the processor to execute the following:
 transmitting a registration request message to a map server that wants to implement the navigation service; 
 receiving a registration response message for the registration request message transmitted by the map server; 
 transmitting a map request message including information about a destination to the map server; 
 receiving a map response message including map information regarding a path to the destination transmitted by the map server; and 
 displaying said map information and the path. 
   
     
     
         25 . The terminal of  claim 24 , further comprising:
 receiving lamp Identifier (ID) messages to all lamps positioned along the path.   
     
     
         26 . The terminal of  claim 25 , wherein said ID messages are transmitted concurrently. 
     
     
         27 . The terminal of  claim 25 , wherein said ID messages are transmitted sequentially. 
     
     
         28 . The terminal of  claim 27 , wherein said ID messages are transmitted dependent upon a current location of said terminal. 
     
     
         29 . The terminal of  claim 27 , wherein an identification of at least one prior and one intended ID message is transmitted based on a current location of said terminal.