73 research outputs found
Autonomous functionalities for cognitive radio
This paper provides an overview on the research activities in autonomous
functionalities for cognitive radio and networks, carried out in FP7/E3-project. The
identified main research areas within this topic include opportunistic spectrum access
and autonomous self-x functionalities for communication nodes. Opportunistic
spectrum access delineates innovative topics concerning distributed cooperative
spectrum sensing, collaborative MAC algorithms, distributed radio resource
management algorithms, and control mechanisms for the opportunistic spectrum
access. In autonomous self-x functionalities the research covers cognitive device
management, autonomous RAT and operator selection and self-x features for
autonomous elements, including autonomous decision making functionalities for
RAT protocol configuration, negotiation on missing RAT protocol components, and
functionality for dynamic configuration of RAT protocol components.Postprint (published version
Control channels for the cooperation of cognitive management systems in opportunistic and composite wireless networks
Opportunistic Networks (ONs) are assumed to be temporary, localized extensions of the
infrastructure network that are created under certain circumstances. According to that vision, ONs
are coordinated by the radio access network (RAN) operator which governs the overal system
behaviour (e.g. ON related policies), provides the neccessary resources (e.g. dedicated specturm
bands) and supports users in decision making (e.g. additional knowledge and context information). ONs comprise both nodes of the infrastructure and infrastructure-less devices. For the management and control of operator-governed ONs the introduction of Cognitive Management Systems (CMSs), localized on the terminal and infrastructure side, is proposed. The cooperation of
CMS entities will require existence of well-defined control channels. In order to enable the necessary signalling between the CMS entities, Control Channels for the Cooperation of the Cognitive Management Systems (C4 MS) are proposed.Peer ReviewedPostprint (published version
Cognitive control channels for the cooperation of opportunistic and composite wireless networks
Opportunistic networks (ONs) are considered as coordinated extensions of a radio access network infrastructure, which are dynamically and temporarily created in an infrastructure-less manner in order to increase service reachability, improve resource utilization efficiency and facilitate localised service provisioning. The realization of the ON concept relies on the existence of control channels which will provide necessary signalling for the coordination of the ON
nodes. Proposed control channels are conceived as an evolution of the already established cognitive pilot channel
concept. As a result, new interfaces are discussed in order to convey information from the infrastructure to the terminals
and vice versa or between terminals. Finally, the business benefits of the aforementioned approach are provided in
order to strengthen the notion of the proposed control channels and consider future expansions.Peer ReviewedPostprint (published version
Protocols, performance assessment and consolidation on interfaces for standardization – D3.3
The following document presents a detailed description of the protocol for the “
Control Channels for the Cooperation of the Cognitive Management System
” (C4MS) which provides the necessary means
to enable proper management of Opportunistic Networks.
Additionally, the document defines the
methodology that was applied for the purpose of signalling evaluation.
The protocol overview presented in section
2 of the main document, provides the
C4MS principles.
The section includes, among others, the description of the protocol identifiers,
procedures, protocol state machines and message format as well as the security asp
ects.
Section 3 provides a high-level description of the data structures defined within the scope of OneFIT project. The data structures are classified into five categories, i.e.: Profiles, Context, Decisions,Knowledge and Policies. The high level description is complemented by some detailed data
structures in the Appendix to D3.3 Section
3[10].
Section 4 provides details on the evaluation methodology applied for the purpose of C4MS
performance assessment. The section presents
the evaluation plan along with a description of metrics that are to be exploited in the scope of WP3.
Section 5 and Section 6 are composed of the signalling evaluation results. Section 5
focuses on the estimation of the signalling load imposed by ON management in different ON phases. Additionally some results for the initialization phase (not explicitly mentioned in the previous phases of the
project)and security related aspects are also depicted. Section 6 on the other hand is
focused on the evaluation of the
signalling traffic generated by
different ON related algorithms.
Conclusions to the document are drawn in section 7. Detailed description of the C4MS procedures, implementation options based on IEEE 802.21, DIAMTER and 3GPP are depicted in the appendix to the D3.3[10]
. Additionally, the appendix incorporates the detailed definition of the information data structures and final set of Message Sequence Charts (MSCs) provided for
the OneFIT project.Peer ReviewedPreprin
Performance assessment & synergic operation of algorithmic solutions enabling opportunistic networks– D4.2
Deliverable D4.2 del projecte europeu OneFITPeer ReviewedPostprint (updated version
Formulations and identification of algorithmic solutions for enabling opportunistic networks - M4.1
Milestone M4.1 del projecte Europeu OneFIT (ICT-2009-257385).This document contains a detailed description of the algorithms to be implemented to manage the opportunistic networks. There are defined according to the functional and system architecture (WP2) to fulfil the technical challenges.
These algorithms will implemented during the WP4.2 and validated during the WP4.3Postprint (published version
Validation platform implementation description – D5.2
Deliverable D5.2 del projecte OneFITPostprint (published version
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