Meeting
Agenda Meeting
Agenda
``Transparent Communication Management in Wireless Networks''
David Kidston, CS Grad Student
ABSTRACT
Wireless networks are characterized by the generally low quality of service (QoS) that they provide. In the face of user mobility between heterogeneous networks, it is understandable why distributed applications designed for the higher and constant QoS of wired networks have difficulties operating in such complex environments.
Proxy systems provide one solution to this problem. By placing an intermediary on the communication path between wired and wireless hosts, the communication streams passing between the elements of the distributed application can be filtered. This processing can ameliorate wireless heterogeneity by converting the wireless side of the stream to a more appropriate communication protocol, or can reduce bandwidth usage through data filtering. It is up to the application to request and control services at the proxy.
This model of control is not always appropriate. Many legacy application designed for the wired environment cannot be modified for use with a proxy. Similarly, though proxies can convert from one communication protocol to another at the interception point, this conversion breaks the end-to-end semantics of the original communication stream.
This thesis explores an alternate proxy-control method,
where control of filter services can originate outside
the application. This model relies on knowledge of
application data and communication protocols to support
filters which can make packet-level modifications that
do not compromise the operation of either protocol or
application. These new _transparent_ services are
controlled externally through a user interface designed
for third-party service control.
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