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The global Beyond 3G system will consist of several coexisting and cooperating access technologies. One of the key concepts of this global technology is the Reconfigurability, that allows different network elements to dynamically adapt their configuration to the new conditions encountered in specific service areas and time. Reconfigurability may comprise dynamic spectrum allocation: a technique that varies spectrum allocation of different systems in order to meet changing demands. In this context of multiple access techniques and changing spectrum allocation, when a mobile is switched on, it has no information about the available systems in its area nor on the current spectrum allocation to these systems. In order to avoid the scanning of all the spectrum range and to facilitate the initial connection to the network, this paper proposes that the mobile listens first to a broadcast radio channel containing the necessary information to initiate its connection. The paper defines the content of this broadcast channel, denoted Common Pilot Channel, and proposes a technical implementation.

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Abstract-An important emerging capability is for mobile terminals to be dynamically reconfigured. Through ongoing advances in technology such as software defined radio, reconfiguration of mobile terminals will in the near future be achievable across all layers of the protocol stack. However, along with the capability for such wide-ranging reconfiguration comes the need to manage reconfiguration procedures. This is necessary to coordinate reconfigurations, to ensure that there are no negative effects (e.g. interference to other RATs) as a result of reconfigurations, and to leverage maximal potential benefits of reconfiguration and ensuing technologies such as those involving dynamic spectrum access. The IEEE P1900.4 working group is therefore defining three building blocks for reconfiguration management: Network Reconfiguration Management (NRM), Terminal Reconfiguration Management (TRM), and a radio enabler to provide connectivity between the NRM and TRMs. In this paper we concentrate on aspects of the radio enabler, highlighting its relevance in heterogeneous radio access scenarios, its advantages, and some aspects of its technical realization.

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