IMS messaging gateway in the Cloud

For mobile messaging service providers to endure in a competitive and dynamic market, it is vital to be flexible, which involves keeping up to date to technological developments, and to be cost effective. In order for service providers to provide highly available service, the use of Cloud computing technology is a well-suited solution. Cloud computing allows resources to be provided as general utilities, which users can lease and release in an on-demand fashion through the Internet. In this thesis an HTTP based mobile messaging solution is designed, implemented and described and deployed in the Amazon Cloud, with the main goal of determining to what extent the availability of mobile messaging services improves when deployed in the Amazon Cloud. Three testing environments are proposed for deploying mobile messaging services, i.e. using a proprietary server, Auto Scaling service and the Elastic Load Balancing service provided by Amazon. The architectures for all three scenarios are described and illustrated, and a description is provided of their implementation. Based on performance tests executed in all three scenarios the improvement in availability is determined. Also stress tests are executed in all scenarios with the purpose to compare the performance, i.e. the average response time required to process a subscriber’s request for service, of each scenario with each other. A comparison of the test results provides insight into the availability of the tested messaging service, and the relationship that exists between each scenario’s performance.Information ArchitectureComputer ScienceElectrical Engineering, Mathematics and Computer Scienc