Changes between Version 1 and Version 2 of Letibee

Timestamp:

Nov 4, 2010, 11:33:18 PM (14 years ago)

Author:

Sensei

Comment:

--

Letibee

@@ -1 @@
-...
+= Letibee Island =
+
+[[PageOutline(2-4,Table of Contents,inline)]]
+
+== Introduction ==
+
+This document describes how to setup the SENSEI Letibee based island. 
+
+== Objectives ==
+
+The network at CEA-Leti provides information to an end-user located at a gateway or through the Sensei platform. These information are
+* Nodes position
+* Average value of a measure done at each node side (ie luminance or temperature)
+* An estimated map of the measure done at each node side.
+
+
+
+Figure 1 : CEA WSAN + Gateway for Sensei
+
+The WSAN activities do not use standardized communication protocols. Due to this constraint the communication with a node is not direct but through a virtual connection managed by a gateway (ie : a more powerful node included in the network).
+
+
+
+
+
+= Datamanager =
+
+The datamanager is a standalone software which have the following objectives:
+
+* Gather frames received on the usb port from the Letibee WSN
+* Put data into database tables (rssi and position - see below)
+* Remove older data if a time limit is specified
+
+
+= Database =
+
+The database is a MySQL database. The script below create the tables and the rows useful for the datamanager and the gateway.
+
+
+{{{
+CREATE DATABASE sensei;
+USE sensei;
+
+CREATE TABLE rssi (TxNodeId double);
+ALTER TABLE rssi ADD (RxNodeId double);
+ALTER TABLE rssi ADD (Rssi double);
+ALTER TABLE rssi ADD (RelativeTime double);
+ALTER TABLE rssi ADD (Time time);
+ALTER TABLE rssi ADD (Date date);
+
+CREATE TABLE position (NodeId double);
+ALTER TABLE position ADD (PositionX double);
+ALTER TABLE position ADD (PositionY double);
+ALTER TABLE position ADD (Time time);
+ALTER TABLE position ADD (Date date);
+
+CREATE TABLE measTemperature (NodeId double);
+ALTER TABLE measTemperature ADD (Temperature double);
+ALTER TABLE measTemperature ADD (RelativeTime double);
+ALTER TABLE measTemperature ADD (Time time);
+ALTER TABLE measTemperature ADD (Date date);
+
+CREATE TABLE measLuminance (NodeId double);
+ALTER TABLE measLuminance ADD (Luminance double);
+ALTER TABLE measLuminance ADD (RelativeTime double);
+ALTER TABLE measLuminance ADD (Time time);
+ALTER TABLE measLuminance ADD (Date date);
+
+CREATE TABLE regmapOut (Type text);
+ALTER TABLE regmapOut ADD (RefPositionX double);
+ALTER TABLE regmapOut ADD (RefPositionY double);
+ALTER TABLE regmapOut ADD (Value double);
+ALTER TABLE regmapOut ADD (PositionX double);
+ALTER TABLE regmapOut ADD (PositionY double);
+ALTER TABLE regmapOut ADD (Time time);
+ALTER TABLE regmapOut ADD (Date date)
+}}}
+
+= Octave algorithms =
+
+Octave algorithms are used to compute rssi and position datas in order to generate more accurate positions datas and a regularized map. Different types of algorithm may be available. 
+
+
+= Gateway = 
+
+The Gateway task is to read on demand the information saved in DB tables and send these results by using the appropriate format to the end-user through the Sensei framework. 
+
+
+The LetiBee plugin is based on a skeleton plugin and its HandleRequest method. Most of datas are reachable using GET methods, each making a request to the database to get the up-to-date datas. Published datas are listed below. 
+
+= Published datas: =
+
+
+The communication from the gateway to the end-user will be done using a text file. The Letibee WSAN is thinked like a geographic information database. This database contains nodes identities, positions (§Erreur : source de la référence non trouvée), measures and their histories (§Erreur : source de la référence non trouvée), estimate of others positions values using any kind of algorithms (§Erreur : source de la référence non trouvée). All these information will be send through the Sensei framework using the appropriate protocol and xml format.
+
+== WSAN description ==
+
+Resource description
+        Sensors
+                /letibee/nodes
+
+This resource returns the number of nodes in the letibee network and their identities.
+
+== Nodes position ==
+
+Resource description
+Sensors
+/letibee/[nodeid]/[position]
+
+Where position = positionX, positionY
+
+This resource returns the position of the identified node
+
+== Nodes measurements ==
+
+Resource description
+Sensors
+/letibee/[nodeid]/[scalar_sensor_type]
+
+With scalar_sensor_type= luminance, temperature
+
+This resource returns the measured value of the sensor and time reference for the considered node.
+
+== Regularized map ==
+
+Resources description
+Sensors
+/letibee/regmap
+
+This resource allows the user to choose between differents algorithms for computing the regmap, and the consensusStrength ; returns a VRML file (.wrl) (find a plugin here : http://cic.nist.gov/vrml/vbdetect.html)
+
+        Parameters
+                /letibee/mapdescription
+
+This resource returns the name of the algorithm used to compute the last regmap.
+
+