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Connection rerouting for wireless ATM

Connection rerouting for wireless ATM. ATM =Asynchronous Transfer Mode= Transfering voice, video and data by dividing information into packets and transferring each packet over network separately Rerouting = modifying connection when mobile user changes its base station

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Connection rerouting for wireless ATM

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  1. Connection rerouting for wireless ATM ATM=Asynchronous Transfer Mode= Transfering voice, video and data by dividing information into packets and transferring each packet over network separately Rerouting = modifying connection when mobile user changes its base station BS= base station = connection of mobile user with fixed (wired) network

  2. Connection rerouting schemes • Connection reestablishment=creating new path • Path (connection) extension (in wired network) = chaining • Anchor routing= path extension with connection from old BS to its anchor deleted • Crossover Switch Discovery = Dynamic rerouting = Incremental reestablishment; centralized or distributed – connection servers • Hybrid schemes (Path extension with possible CSD) • Path setup in advance (connection tree, prediction) • Extending wireless ATM connection = adding wireless link from old BS to new BS to the path

  3. Crossover Switch Discovery schemes • Break and make • Make and brake • Chaining with break-make • Chaining with make-break • Criteria for invoking path optimization: • violating QoS (Quality-of-Service) metrics: • end-to-end delay; jitter (delay within some bounds) • bandwidth (the amount of information per time unit) • -increased call dropping probability at a switch • -periodically

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