Mobility Code and execution state Strong mobility Migratio Proactive mechanisms -Remote cloning Proactive Weak mobility Code shipping Stand-alone-T Synchronous code Asynchronous mmediate Deferred Code chronous Asynchronous→ Immediate Deferred Code fetching-TStand-alone code Synchronous Asynchronous-TImmediate Deferred Code Synchronous Asynch DEferred Data space Binding removal management Network reference Re-binding By copy By mov 2021/2/2 Institute of Computer Software, Nanjing University2021/2/2 Institute of Computer Software, Nanjing University 17