Oasis: an overlay-aware network stack
ACM SIGOPS Operating Systems Review
Optimization models for application migration to support mobile thin clients
Proceedings of the Third international EURO-NGI network of excellence conference on Wireless systems and mobility in next generation internet
Cells: a virtual mobile smartphone architecture
SOSP '11 Proceedings of the Twenty-Third ACM Symposium on Operating Systems Principles
Preserving TCP connections across host address changes
ISC'06 Proceedings of the 9th international conference on Information Security
The Design, Implementation, and Evaluation of Cells: A Virtual Smartphone Architecture
ACM Transactions on Computer Systems (TOCS)
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The combined force behind ubiquitous mobile computing and storage devices and universal network access has created a unique era of mobile network computing, in which computation units ranging from a single process to an entire host can move while communicating with each other across the network. A key problem therefore is how to preserve the ongoing network communication between two computation units when they move from one place to another; because current network infrastructure and protocols are designed to support stationary communication endpoints only. We have developed MOVE, a fine-grain end-to-end connection migration architecture, to address the problem. The most distinguishing characteristic of MOVE is that MOVE achieves, in a single system, several essential goals of a mobile communication architecture including: (1) entirely end system only without any infrastructure demand, transport protocol independence, and backward compatibility; (2) fine-grain connection migration and unlimited mobility scope; (3) secure migration with both handoff and suspension/resumption support; and (4) very low performance overhead both before and after migration. We first analyze the key technical problems of end-to-end network communication caused by mobility: state inconsistency, conflict, and synchronization; and we develop a simple and elegant namespace abstraction called CELL to resolve these problems. CELL provides a virtual, private, and labeled namespace for individual connection states so that they can be transparently migrated anywhere free of the problems mentioned above. We then develop a unique handoff signaling protocol called H2O, which can handoff a connection securely in a single one-way end-to-end trip with minimal impact on the connection characteristics perceived by the transport protocols. H2O achieves this by combining the simple connection redirection mechanism afforded by the CELL abstraction with a low-overhead security mechanism, which is based on Diffie-Hellman protocol but computes session keys only at migration time. We finally integrate MOVE seamlessly with a process migration mechanism to fully exploit MOVE's fine-grain connection migration capability and enable support for new application scenarios. For example, we show how the integration can provide high service availability in proxy-based server clusters by allowing server applications and their persistent connections to be migrated during a server maintenance to avoid service disruption. (Abstract shortened by UMI.)