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GSM-SIP Gateway
| Nome: | Descrição: | Tamanho: | Formato: | |
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| 3.3 MB | Adobe PDF |
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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.