System and method for transferring navigation information using different coordinate systems
First Claim
Patent Images
1. An on-board unit for receiving navigation information comprising:
- a power port configured to receive power from a power supply;
a GPS antenna port configured to receive information from a GPS antenna;
a wireless communications port configured to receive information from a wireless network;
a display port configured to communicate with a display device;
wherein the on-board unit receives navigation information through the wireless communications port; and
wherein the navigation information includes data formatted in relative coordinates and data formatted in absolute coordinates; and
wherein the on-board unit assembles a map including first map regions encoded in relative coordinates and second map regions encoded in absolute coordinates.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for formatting and transferring navigation information is disclosed. The system and method can send and receive navigation information. The navigation information can be formatted and transferred using different coordinate systems. In some cases, an absolute coordinate system is used and in other cases, a relative coordinate system is used to encode or express various map features. This can assist in reducing the amount of information transferred and can facilitate rapid delivery of the navigation information.
55 Citations
29 Claims
-
1. An on-board unit for receiving navigation information comprising:
- a power port configured to receive power from a power supply;
a GPS antenna port configured to receive information from a GPS antenna;
a wireless communications port configured to receive information from a wireless network;
a display port configured to communicate with a display device;
wherein the on-board unit receives navigation information through the wireless communications port; and
wherein the navigation information includes data formatted in relative coordinates and data formatted in absolute coordinates; and
wherein the on-board unit assembles a map including first map regions encoded in relative coordinates and second map regions encoded in absolute coordinates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a power port configured to receive power from a power supply;
-
10. A method for preparing navigation information comprising the steps of:
- receiving a request for navigation information;
determining an overall route and constructing an overall map;
selecting a first portion of the overall map; and
determining whether the first portion is more efficiently encoded using relative or absolute coordinates; and
constructing a map using the encoded first portion. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24)
- receiving a request for navigation information;
-
21. A method for preparing navigation information comprising the steps of:
- receiving a request for the navigation information;
preparing the navigation information using an absolute coordinate system and a relative coordinate system;
wherein the absolute coordinate system uses two bytes to define each absolute coordinate; and
wherein the relative coordinate system uses two bytes to define an initial coordinate and uses one byte to define a subsequent coordinate; and
constructing a map using the absolute coordinate system and the relative coordinate system. - View Dependent Claims (22, 25, 26, 27, 28, 29)
- receiving a request for the navigation information;
Specification