Patent ID: 8190686
Filing Date: 2012-05-29
Classification: H04L

Abstract:
1. A spam filtering system for a wireless network, the spam filtering system comprising: an interface implemented between a sender of an SMS message and an SMS center that receives a SMS message destined for a mobile communication device; a processing system having a first processing stage that receives the SMS message from the interface; said processing system including said first processing stage that performs a cursory check of the SMS message based on first filtering criteria to make an initial determination whether the SMS message is suspected of comprising spam; said first processing stage being further adapted to transmit the SMS message to the SMS center responsive to an initial determination by said first processing stage that the SMS message is not suspected of comprising spam; said first processing stage forwards the SMS message to a second processing stage to make a final determination whether the SMS message comprises spam, said final determination based on second filtering criteria and comprising a more thorough check of the SMS message relative to the first processing stage responsive to the initial determination by said first processing stage that the SMS message is suspected of comprising spam; responsive to a final determination by the second processing stage that the SMS message does not comprise spam, said second processing stage being adapted to transmit the SMS message to the SMS center; and responsive to a final determination by the second processing stage that the SMS message comprises spam, said second processing stage being adapted to block the SMS message and automatically update at least one of the first filtering criteria and the second filtering criteria.