Databases Reference
In-Depth Information
task. Once the results have been obtained, MAlfred sends them with a mes-
sage to SAlfred.
The system that we propose can be presented from two different points
of view, depending on where the GSNs are situated and who owns them. On
one hand, a GSN owned by the company that is offering the wireless com-
munication infrastructure (e.g., a cellular phone company) can be consid-
ered. In that model, the GSN can offer some services for the general use of
mobile users that contract them to the company. Those services include the
following (see Figure 10.2):
A broadcast transmitter, for disseminating general-interest informa-
tion such as local traffic conditions and weather forecasts;
·
Yellow pages, for providing access to different data repositories that
contain general-interest information such as local restaurants;
·
Access to Internet à la carte, for facilitating the use of the push tech-
nology to the mobile users;
·
Available software, such as freeware software, that can be used on the
mobile computer or on the GSN on behalf of the mobile user;
·
Proxy
Broadcast place
Cache place
Internet à la
carte place
MU1
Yellow pages place
Create
Message (do X)
Software place
Go
Go
Create
Inventory
place
Locker place
MU2
SAlfred agent
MAlfred agent
Specialized worker
Broadcast place agent
Figure 10.2
Mobile computing environment with GSN elements and mobile agents.
