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2.2. Creation of "subnets" Table

In order to measure the WiFi performance, WiFiMon embeds JavaScript in frequently-visited websites and the tests are triggered once the End User visits these websites. However, the tests should be restricted only to users/subnets that are served by the WiFi network that is measured. To achieve this, a list of the registered Subnets that are allowed to perform tests is included in subnets table:WiFiMon measures the performance of WiFi networks by embedding JavaScript code in frequently visited websites. Performance tests are triggered when End Users visit these websites and, in particular, after a web page is loaded so that browsing experience is not impacted by WiFiMon. Notably, these websites are not only visited by End Users residing in the monitored subnets, but also from End Users outside them. Thus, alleviating the WAS from processing excessive traffic requires that performance tests consider measurements originating only from the WiFi networks that are monitored. To that end, a list of the registered subnets from which End User measurements are processed by the WAS are maintained in subnets table. The creation of this table is detailed in the following code block.

CREATE TABLE subnets (
subnet text,
subnet_id serial PRIMARY KEY );

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