Cyclostationary Codec: an Implementation Enabling Alternative Networks

The field of dynamic spectrum access (DSA) enables and encourages new approaches to how spectrum is owned, used, managed and licensed. Combining the wider access to spectrum which DSA promises with reconfigurable user deployed infrastructure opens up the opportunity to create mobile networks from the bottom-up rather than solely rely on traditional top-down architectures. In this paper we experimentally explore a means of allowing independent service providers using whatever spectrum they can find, to come together in a loose form of coalition which supports mobility between service providers. The service providers are not required to use similar network configurations - i.e. they can configure to best suit their needs and in line with what spectrum they find available. Our solution, first introduced in [1], involves the use of what we term a cyclostationary codec which in essence is a physical pattern that can be placed in the control channel of the service provider. This pattern is the key enabling mechanism for identifying the coalition, enabling rendezvous, supporting handover and conveying details of the service provider configuration. The paper focuses on experimental evaluation of a prototype system and explores the robustness of the concept.