Context Awareness Information Sharing Service based on Location-based Communication Policy

Since more networking technologies and communication channels have been developed, Internet users have moved their roles from being strictly information consumers to both information consumers and producers. Moreover, users on nets might also be intermediaries, inter-actors, interferences or message providers, even service providers. Information on the Internet is dramatically growing. On one hand, it is good for all users to gain more information; on the other hands, it is getting more annoying to get too much information or too many messages daily. Some of them are useful, but the rest is annoying and useless. The useless information a user gets is often called “Spam”. When a user is unwilling to receive spam, it is his/her privilege to reject it. Many self-service web services are applied to categorize the incoming messages through rough site policies, especially on email servers. Junk emails are classified and put into a folder of spam if it fits a specified filter. Thus, a user does not have to read through the suspicious junk emails in his normal incoming folder. However, this spam is not trashed. When the user wants to read the junk email, those emails can still be found. When cellular phones are involved in our daily life, mobile messages become another fast growing issue. Unfortunately, junk mobile message filters are not provided in the mobile phone environment yet. Users are forced to receive every incoming message, and then manually choose to read or ignore it. If every acceptance or refusal requests users’ approval, the time wasted and nuisance is unacceptable. CAIS, which stands for Context Awareness Information Services, is proposed in this paper. CAIS is composed of several mobile services, so it provides a mobile context awareness communication based on the idea of information sharing and location based communication. It also contains a set of pre-defined policy, so users can only get and share the information on demand. By means of location based communication, the cost of transferring messages is negligible and information sharing is processed in silence.