Local position system. Get map and position on demand.
Most existing GPS and LPS (Local Position system) are built on the principle of defining your own coordinates by a receiver, based on the processing of precision radio signals from external sources (satellites).
These systems have several features:
- Poor working in urban environment (compliance with conditions of radio visibility is required).
- GPS-navigator must have significant computational power to determine the coordinates. It leads to an increase of its cost.
- For orientation in a geographical area the GPS-navigator must be equipped with a map. This also increases its cost.
- The map (electronic or paper) is static in nature, which results in need to replace it periodically for synchronizing it with the dynamically changing world.
- In case of an armed conflict, the signal from satellites can be damped, and the satellites put out of operation. (By bringing a bucket of bolts out into the orbit ).
- Only few countries have appropriate technical and financial capacity to implement such systems.
- GPS navigators do not give really useful information to the (urban) user.
- Positioning system technology using WiFi, GSM have low accuracy positioning.
The suggestion is to create an alternative system for determining the coordinates, Local position system, which would supplement and under certain conditions replace the existing positioning systems. I suggest abandoning the principle of positioning based on the passive reception and analysis of radio signals by the navigator's receiver, and using an active scheme instead. The system consists of LPS-navigators and a LPS-network. An LPS-navigator is equipped with a transmitter. To determine the coordinates it should emit a signal sending a request to the LPS-network: "Where am I?" and get a reply.
LPS network consists of many RxTx-nodes combined into an IP network, and operates according to the following algorithm:
- Accepts a request from LPS-navigator.
- Executes identification and authentication of the object which sent the request.
- Calculates the position of the object using the captured signal from all RxTx-nodes.
- Sends the computed coordinates back to the LPS-Navigator.
- Depending on the context and the authorized data, the corresponding map is sent to the LPS-Navigator.
- In case of difficulty or inability to calculate the coordinates of the object with a given accuracy, LPS network can send a request to the LPS-Navigator to repeat the signal. The signal may be repeated with a modified capacity, duration, a different frequency, with different modulation etc.
This principle of the LPS system has the following advantages:
- The cost of LPS-navigators, due to the fact that the calculation of the coordinates is performed by the LPS-network, can be reduced.
- The accuracy of positioning in urban environments will be increased due to the active work of the LPS-navigator.
- The LPS-navigator receives the necessary map (the relevant part of it) every time with the coordinates from the LPS-Network. An example:
- A marine will receive a map with a detailed topography, indicating the heights, the depths of rivers etc. on the screen of the navigator.
- A shopper will receive a store plan showing the store shelves, the location of the goods after having sent the request "where am I?".
- A tourist will get a map showing the city, attractions, hotels, shops.
- A driver will receive a city map with a plan of streets and their current auto traffic load. (Map is created dynamically)
- LPS-navigators can "help" each other in determining the coordinates, as well as improve the accuracy of their determination, interacting not only with the LPS-network, but also with each other.
- LPS-network can be easily deployed on the existing IP network.
- The system scales easily: store, district, city, country.
- The cost of the deployment of this system is low and is available to individuals.
- Multiple systems can be simultaneously deployed within the same geographical area.
- In standby mode, neither the LPS-Navigator nor the LPS-Network emits radio signals, which reduces the level of interference, but also makes the system "radio invisible" - this feature may be of interest to the military.
The suggestion is to create a whole line of products providing the definition of the coordinates at following scales: home/apartments, district, city, region, country. The devices can operate in the radio, infrared or optical range. We think that the Cisco Application Extension Platform
will suit ideally to build a core LPS-Network.