@inproceedings {Ruf2014b, title = {Bandwidth Measurements and Capacity Exploitation in Gigabit Passive Optical Networks}, booktitle = {Fotonica 2014}, year = {2014}, month = {05/2014}, abstract = {

We report an experimental investigation on the
measurement of the available bandwidth for users in Gigabit
Passive Optical Networks (GPON) and the limitations caused by
the Internet protocols. We point out that the huge capacity
offered by the GPON highlights the enormous differences that
can be showed among the available and actually exploitable
bandwidth in the case of TCP. In this ultrabroadband
environment we also investigated on use of the UDP and of the
multisession TCP. A correlation in terms of QoE is also reported.

}, keywords = {access capacity, GPON, QoE, QoS, Throughput}, author = {Arianna Rufini and Edion Tego and Francesco Matera and Marco Mellia} } @article {Ruf2014, title = {Multilevel Bandwidth Measurements and Capacity Exploitation in Gigabit Passive Optical Networks}, journal = {IET Communications}, volume = {8}, year = {2014}, month = {11/2014}, pages = {8}, chapter = {3357}, abstract = {

We report an experimental investigation on the measurement of the available bandwidth for the users in Gigabit Passive Optical Networks (GPON) and the limitations caused by the Internet protocols, and TCP in particular. We point out that the huge capacity offered by the GPON highlights the enormous differences that can be showed among the available and actually exploitable bandwidth. In fact, while the physical layer capacity can reach value of 100 Mb/s and more, the bandwidth at disposal of the user (i.e. either throughput at transport layer or goodput at application layer) can be much lower when applications and services based on TCP protocol are considered. In the context of Service Level Agreements (SLA) verification, we show how to simultaneously measure throughput and line capacity by offering a method to verify multilayer SLA. We also show how it is possible to better to exploit the physical layer capacity by adopting multiple TCP connections to avoid the bottleneck of a single connection.

}, keywords = {Fiber Networks, GPON, Quality of Service, TCP}, issn = {1751-8628}, doi = {10.1049/iet-com.2014.0165}, url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6980492}, author = {Arianna Rufini and Marco Mellia and Edion Tego and Francesco Matera} }