Master Thesis: DSU and Restore State

## Join our Team About this opportunity: Radio Access Network (RAN) functions have stringent requirements on performance, availability, and resilience. Restarting a RAN application to update a shared library can interrupt ongoing services. Dynamic Software Updating (DSU) enables shared libraries to be upgraded while the application continues running. However, stateful libraries also maintain protocol contexts, allocated resources, timers, statistics, caches, thread-local data, and references to application objects. This state must be preserved or migrated to avoid interrupted sessions, performance degradation, or loss of service. This master thesis will investigate how a stateful shared library can be safely upgraded at runtime, including state migration, compatibility, concurrent access, bounded service interruption, failure handling, and rollback. What you will do: * Investigate and compare current research in runtime library updates and state migration * Can state be migrated while the application continues processing? (Investigate different type of states. State to be identified, captured, serialized, and restored. Detect incompatible state and do rollback. Impact on programmer and level of automation in migration.) * Prototype and showcase one or more ways to update a shared library with state migration for a program in runtime * Investigate impact on RAN functions (time to upgrade, implementation complexity, security risks, state handling, how to detect incompatible state and rollback, time to upgrade, …) The skills you bring: * Master´s student in computer science, computer engineering, software engineering, or a related field. * You have an interest in operating systems, software updating, distributed systems, or runtime systems. * You have knowledge of programming in C/C++ or a similar systems programming language. Why join Ericsson?At Ericsson, you´ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what´s possible. To build solutions never seen before to some of the world’s toughest problems. You´ll be challenged, but you won’t be alone. You´ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next. What happens once you apply?Click Here to find all you need to know about what our typical hiring process looks like.Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do. We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity Employer. learn more. Primary country and city: Sweden (SE) || Linköping Req ID: 792027