A Dynamic Survivability Reconfiguration Framework Based on QoS

Abstract

Traditional security approaches are not sufficient to deal with the protection and survivability of highly distributed information systems operating in unbounded networks. In view of the deficiencies of the essential services' self-recovering when the survivable system is not available, an efficient self-adjusting reconfiguration framework on system survivability is presented based on the service-level QoS. In this framework, some QoS metrics are discussed, and the survivability reconfiguration trigger condition is made, then the application steps of survivability reconfigureation are described in detail, and corresponding dynamic reconfiguration algorithm is given. The framework can probe the newest state of system, give the decision guideline quantificationally, and execute the dynamic reconfiguration algorithm in bounded time when system suffers attack or failure, then take some reconfiguration actions correctly.

Software Development Lifecycle for Survivable Mobile Telecommunication Systems

“…A similar approach of reconfiguring the system and switching to different level of quality of service is also provided in [8], where the authors claim that QoS and survivability are firmly connected. As a result, if QoS is to be measured, reconfiguration approaches may be triggered under certain measurements to provide survivability for the system.…”

“…Such reconfiguration may be "process/host restart, migration of objects to alternate hosts, replication, transparent rebinding of clients and servers, use of service alternatives, and approximate services". [8] These reconfigurations may be based on several metrics like "available battery power, varying communication bandwidth, available memory or faults in software components" [8] and must be done in predetermined time and based on QoS service levels. Then a survivable system must provide a minimum level of QoS under changing environments.…”

Survivable mobile telecommunication systems

“…A relevant approach of reconfiguration of the system is also provided by LI WANG et al [41]. What is supported to this paper is that QoS and survivability are firmly connected.…”

“…Such reconfigurations may be "process/host restart, migration of objects to alternate hosts, replication, transparent rebinding of clients and servers, use of service alternatives, and approximate services". [41] These reconfigurations may be based to several metrics like "available battery power, varying communication bandwidth, available memory or faults in software components" [41] and must be done in bounded time and must be based on QoS service levels. QoS for each subsystem of a system may be measured by different factors.…”

“…Return to step1." [41] Resource Management, manages and evaluates the state of resources, and predicts possible future states of resources. This is also responsible to allocate the best-suited resource to the examined service.…”