GSM-SIP Gateway

• Autor(a) principal: Estevam, André Filipe Ramos
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10362/34374
• topic: Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática

Mobile communication systems are currently evolving. Users seek higher efficiency and better user experience in terms of quality of service with minimal cost. Furthermore, the number of active users is growing every day. Therefore, there has been a great effort in changing the network infrastructure to support the user’s needs. These changes allow the network to adapt itself to the increasing number of users, with lower costs and shorter upgrade cycle periods at the radio, at the core and at the service level. This dissertation explores the unification of the radio level with the core to achieve higher performance and adaptability at lower cost. The Software Defined Radios, SDRs, allow to replace some hardware based functionalities of the radio level by software, making it possible to achieve greater flexibility and spectral optimization at lower cost. SDRs allow the implementation of a GSM network without a Mobile Switching Center, MSC. By moving the circuit switching to packet switching, and using the SIP protocol, it is possible to integrate the GSM network in an IP based network, as it is the case of a IP Multimedia Services network, IMS. In this document, we present a solution that unifies the radio level and the core level of the network, so that we can achieve greater performance and scalability at a lower cost. A prototype is reported, which offers voice call services over a IP packet switching network and integrates the radio level of a standard GSM network.