Anand Balachandran, Andrew T. Campbell, and Michael E. Kounavis, "Active Filters: Delivering Scaled Media to Mobile Devices", Proceedings of NOSSDAV 1997.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....support the connection [KATZ 94] In order to support mobile users, it is necessary to move the connection to remote resources or to move the resources to local hosts while they are being used. However moving resources is not very common, particularly where they are providing stream based data. BALACHANDRAN 97] describes an implementation where some computing facilities acting on data (filters) are relocated in a cellular system, and discusses the problems of negotiating resource allocation as a result of location changes. Other systems e.g. SRIVASTAVA 97] simply treat the base stations as connection ....

....of the network to accommodate any required filters. Ideally much of this information would be present in, or could be added to the polling messages used already. Where the network cannot maintain the current level of service, base stations should initiate adaptation in conjunction with hand off [BALACHANDRAN 97, CAMPBELL 97a] Fine grained change on the other hand, differs in that it is expected that changes in service provided will be either notified to or negotiated with the applications concerned. Typical causes of fine grained change are: Movement between base stations in wireless networks. ....

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Balachandran, A., Campbell, A.T., Kounavis, M.E.: Active Filters: Delivering Scaled Media to Mobile Devices Proceedings of the IEEE 7th International Workshop on Network and Operating Systems Support for Digital Audio and Video p125-34, 1997

....flexibility of the proxy architecture. In a multicasting scenario, the major concern is bandwidth conservation and reception of the best possible stream from each receiver. To satisfy such a contradicting requirement, the multicasting tree allows the adaptation mechanisms, filters in this case [41, 48, 49], to move up and down the tree structure [47, 50, 51, 52, 53] The algorithm tries to move the filter as close to the source as possible until it reaches a node where the children have incompatible requirements. As another example, consider the wireless access to the Internet case where a ....

....28, 29, 30, 36, 66] Except from adapting the data rate, video streams allow multi dimensional adaptation by adjusting most of the encoding parameters. A filter applied to a video stream in order to change its presentation characteristics is a solution frequently encountered in the literature [41, 48, 49]. The filter can adjust the color depth of the stream, from 32 to 16 or 8 bit color or to grayscale (typically 8 bits per pixel or less) It can also resample it to a lower resolution (very easily if scaling it down by factors of two) It can also change the frame rate of the delivered stream by ....

Balachandran A, Campbell AT, Kounavis ME. Active Filters: Delivering Scaled Media to Mobile Devices. Proceedings of the 7 th NOSSDAV; New York, USA, 1997; 125-134.

....supporting electronic mail, printing, file service or databases. This could imply the need to migrate resources from the user s home servers to local ones, rather than just maintaining network connections to the home servers, in order to provide the required QoS or to reduce communication cost. [14] describes an implementation where some computing facilities acting on data (e.g. filters) are relocated in a cellular system, and discusses the problems of negotiating resource allocation as a result of location changes. Other systems, e.g. 15] simply treat the base stations as connection ....

....and the capacity of the network to accommodate any required filters. Where the network cannot maintain the current level of ser IEEE Communications Surveys . http: www.comsoc.org pubs surveys . Second Quarter 1999 8 vice, base stations should initiate adaptation in conjunction with handover [14, 41]. Fine grained change are those changes which are often transient, but significant enough in range of variation and duration to be outside the range of effects which can be hidden by traditional QoS management methods. These include: Movement between base stations in wireless networks. ....

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A. Balachandran, A. T. Campbell, M. E. Kounavis, Active Filters: Delivering Scaled Media to Mobile Devices, Proc. IEEE 7th Int'l Wksp on Network and Operating Sys. Support for Digital Audio and Video, pp. 125--34, 1997.

....of the network to accommodate any required filters. Ideally much of this information would be present in, or could be added to, the polling messages used already. Where the network cannot maintain the current level of service base stations should initiate adaptation in conjunction with hand off [BALACHANDRAN 97, CAMPBELL 97] Fine grained change on the other hand, differs in that it is expected that changes in service provided will be either notified to or negotiated with the applications concerned. Typical causes of fine grained change are: Movement between base stations in wireless networks. ....

....with fault tolerance [BILLOT 96, FERRARI 97, LEVINE 97] Filtering to include delay or rejection of data, as well as scaling. Selection of filters should be aided by meta data, and available resources. Filters to act as relocatable plug in modules on QoS aware components of the system [BALACHANDRAN 97, CAMPBELL 97, KNIGHTLY 97, ZENEL 95] Control of in service mobility, and migration of resources which is a mobile network oriented problem [CAMPBELL 97, LEVINE 97] Associated with these requirements are the following enabling functions, which are of general interest beyond QoS provision: ....

Balachandran, A., Campbell, A.T., Kounavis, M.E.: Active Filters: Delivering Scaled Media to Mobile Devices Proceedings of the IEEE 7 th International Workshop on Network and Operating Systems Support for Digital Audio and Video p125-34 (IEEE, 1997)

....support the connection [KATZ 94] In order to support mobile users, it is necessary to move the connection to remote resources or to move the resources to local hosts while they are being used. However moving resources is not very common, particularly where they are providing stream based data. BALACHANDRAN 97] describes an implementation where some computing facilities acting on data (filters) are relocated in a cellular system, and discusses the problems of negotiating resource allocation as a result of location changes. Other systems e.g. SRIVASTAVA 97] simply treat the base stations as connection ....

....of the network to accommodate any required filters. Ideally much of this information would be present in, or could be added to the polling messages used already. Where the network cannot maintain the current level of service, base stations should initiate adaptation in conjunction with hand off [BALACHANDRAN 97, CAMPBELL 97a] Fine grained change on the other hand, differs in that it is expected that changes in service provided will be either notified to or negotiated with the applications concerned. Typical causes of fine grained change are: Movement between base stations in wireless networks. ....

[Article contains additional citation context not shown here]

Balachandran, A., Campbell, A.T., Kounavis, M.E.: Active Filters: Delivering Scaled Media to Mobile Devices Proceedings of the IEEE 7th International Workshop on Network and Operating Systems Support for Digital Audio and Video p125-34, 1997

....provide a general proxy architecture for dynamic distillation of data at the server. The use of hierarchically encoded data distributed over several multicast groups is discussed in [16] for the delivery of different qualities of audio and video data. Balachandran et.al target mobile computing in [1] and argue for adding active filters at base stations. Active network proponents [20] argue that Internet routers should be enabled to run arbitrary application level code to assist in protocol processing. The contribution of our work is the use of client feedback to allow for prioritization among ....

Anand Balachandran, Andrew T. Campbell, and Michael E. Kounavis. Active filters: Delivering scaled media to mobile devices. In Proceedings of the Seventh International Workshop on Network and Operating System Support for Digital Audio and Video, St. Louis, Missouri, May 1997.

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A. Balachandran, A. T. Campbell, and M. E. Kounavis, Active filters: Delivering scaled media to mobile devices, in Proceedings, NOSSDAV'97," St. Louis, 1997.

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Anand Balachandran, Andrew T. Campbell, and Michael E. Kounavis, "Active Filters: Delivering Scaled Media to Mobile Devices", Proceedings of NOSSDAV 1997.

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Anand Balachandran, Andrew T. Campbell, and Michael E. Kounavis, "Active Filters: Delivering Scaled Media to Mobile Devices", Proceedings of NOSSDAV 1997.

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A. Balachandran, A. Campbell, M. Kounavis, "Active Filters: Delivering Scaled Media to Mobile Devices", 7th Int. Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV'97), St. Louis, USA, May 1997

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Anand Balachandran, Andrew T. Campbell and Micheal E Kounavis, \Active Filters:Delivering Scaled Media to Mobile Devices", 7th International Workshop on Network and Operating System support for Digital Video and Audio, NOSSDAV 97.

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