Radio over Fiber

Accepted paper for presentation in ICC 2012

Impairment-aware Radio-over-Fiber Control Plane for LTE Antenna Backhauling by Ahmed Haddad, Elias A. Doumith, and Maurice Gagnaire.

Abstract: Provisioning ubiquitous broadband wireless services necessitates the duplication of the radio equipment or/and the reduction of the size of the radio cells. However, both approaches are not economically viable for the operators. The concept of distributed antennas is proposed as an alternative solution offering low-cost broadband access. In this matter, we propose an innovative Radio Access Network (RAN) architecture called GeRoFAN for Generic Radio-over-Fiber Access Network. The GeRoFAN architecture is based on a transparent optical loop connecting low-cost 4G radio-system antennas using analog Radio-over-Fiber (RoF) technology. However, by transporting Radio Frequencies (RFs) over an Optical Channel (OC), the composite signal suffers from various physical layer impairments that may degrade the system capacity. Supported by a mathematical model reflecting the relevant optical layer limitations, we propose in this paper an innovative control plane that targets to optimize the global radio cellular capacity of GeRoFAN by efficiently mapping RFs onto OCs. This problem is formulated as an Integer Linear Program (ILP) with the objective to minimize the number of OCs subject to 4G cellular planning rules.


Accepted paper for presentation in Network of the Future (NoF) 2011

Impairment-Aware Control Plane for Next Generation Radio-over-Fiber Access Networks by Ahmed Haddad, Maurice Gagnaire, and Elias A. Doumith.

Abstract: Radio-over-Fiber is expected to play a key role in the design of Next Generation Radio Access Networks. In this paper, we present an all-optical feeder network architecture called GeRoFAN (Generic Radio-over-Fiber Access Network) able to federate 4th generation radio mobile base stations. Thanks to its original control plane, the GeRoFAN system enables broadband ubiquitous services by dynamic management of radio resources. However, because of the transmission impairments induced by the optical layer on the transported radio channels, this broadband ubiquity may be altered. Through a study case, we highlight the necessity of an impairment-aware control plane to achieve an efficient use of the optical resources while preserving the signal quality of the transported radio channels.


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