D. A. Kidston, Transparent Communication Management in Wireless Networks,Master thesis, Computer Science Department, University of Waterloo, 1998. http://www.shoshin.uwaterloo.ca/publications/index.html  Home/Search   Document Details and Download   Summary   Related Articles   Check

....adaptation retains the advantage of providing a centralized locus of control for adaptation of multiple applications. In this research, we are concerned with application based adaptation where the application is modified to perform calls to the Communication Manager for Mobile Applications (Comma) [28]. Comma is a tool to help adaptive client applications monitor the environment and alter computation and communication behavior accordingly. The monitoring is handled by one Comma component, the Execution Environment Monitor (EEM) and the altering of the stream is handled by a second component, ....

....limitations into account when designing an application and the protocols that it uses, the result will be slow or unusable, and use excessive amounts of the device s limited memory and battery power. There is much research that tries to address these limitations in client server applications [28, 33, 37, 38, 46]. One approach is to insert a new entity into the client server model of computation. The client proxy server model of communication has been used quite successfully in the past to support a variety of applications [28, 31, 34] Instead of transmitting directly to a mobile device, a server can ....

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D. A. Kidston, Transparent Communication Management in Wireless Networks,Master thesis, Computer Science Department, University of Waterloo, 1998. http://www.shoshin.uwaterloo.ca/publications/index.html

....that service and carrying the same interface are different. Other related work includes the LEAD language proposed by Amano and Watanabe [1] which is an object oriented language that takes dynamic adaptability into consideration and is based on a reflective model. Also Kidston et al. [11] propose a proxy solution that will improve the QoS level for communication between wired and wireless environments. Adaptability is achieved by allowing a wired environment with high QoS to meet the lower QoS of a wireless environment. Finally, Katz [10] looks at the issue of adaptation and ....

D. Kidston, J. P. Black, and T. Kunz, "Transparent Communication Management in Wireless Networks", in Proceedings of the 7th Workshop on Hot Topics in Operating Systems, Rio Rico, Arizona, USA, March 1999.

....the last mile, deploying redundant hardware throughout the network is not feasible. In addition, this approach does not address the possibility of software failures in adaptation modules. A third approach is to bypass the end to end reliability mechanism (using split TCP or by adapting TCP itself [9]) and accept some failures. This approach is particularly appealing when only one path exists from the client to the rest of the network, as is commonly the case for last mile adaptation. If the point of adaptation is along this path, then failure of an adapting node will also cause packet ....

David Kidston, J. P. Black, and Thomas Kunz, "Transparent Communication Management in Wireless Networks," Proceedings of the Seventh Workshop on Hot Topics in Operating Systems (HotOS-VII), Rio Rico, AZ, March 1999.

....to protect the reliable transport from possible confusion [2, 9] Generally, these systems do not allow any modification of the original byte stream. Other systems allow more general adaptation, providing a support structure that hides the presence of adaptation from the reliable transport [1, 5, 8]. For instance, an end to end TCP connection can be split in two, allowing an adaptation to occur in between. Unfortunately, hiding the adaptation from the reliable transport introduces a new point of failure to the connection. If the adaptation system were to fail, the end to end connection will ....

....The Berkeley researchers have partially mitigated this issue by increasing the reliability of the proxy node. However, their reliability solution cannot be extended to fully distributed adaptation, where adaptation might be required at many points in the network. Another approach, described in [8], also allows application level adaptation at a proxy node. However, rather than splitting the TCP connection, the proxy node translates all TCP meta data traveling between the two endpoints according to the adaptation that was performed, tricking TCP into believing that it is still providing ....

David Kidston, J. P. Black, and Thomas Kunz, "Transparent Communication Management in Wireless Networks," Proceedings of the Seventh Workshop on Hot Topics in Operating Systems, Rio Rico, AZ, March 1999.

....completing the implementation of a transparent MPEG filter that operates as part of the low level proxy [18] It selectively drops frames of various types depending on the current network conditions. This is achieved transparently to the application through the use of a second, lower level filter [14] that adjusts the TCP protocol headers to mask the removal of data. This preserves the end to end semantics of the TCP stream, even though the two endpoints have divergent views about the amount of data exchanged. WWW BROWSER A possible design for a WWW browser uses the high level proxy as a ....

D. Kidston, Transparent Communication Management in Wireless Networks, Master's Thesis, Dept. of Computer Science, University of Waterloo, October 1998.

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