Browsing by Author "Optical Networks"

Now showing items 21-40 of 82

    • Developments in wavelength division multiple access networking 

      Senior, J.M.; Handley, M.R.; Leeson, M.S. (1998-12-01)
      The last few years have seen a growing interest in WDM for optical networks in order to increase capacity and overcome the electronic bottleneck. Alongside the improvement in WDM components there has been continuing ...

    • Dynamic bandwidth allocation for OFDMA-PONs using Hidden Markov Model 

      Kourtessis, Pandelis; Senior, John (2017-10-25)
      Abstract: Accurate prediction of traffic conditions on OFDMA-PONs is important because of its vital role in network resource management and efficient bandwidth allocation. Given the dynamic and stochastic nature of network ...

    • Dynamic Bandwidth Allocation in Heterogeneous OFDMA-PONs Featuring Intelligent LTE-A Traffic Queuing 

      Lim, Wansu; Kourtessis, Pandelis; Kanonakis, Konstantinos; Milosavljevic, Milos; Tomkos, Ioannis; Senior, J.M. (2014-05-15)
      A heterogeneous, optical/wireless dynamic bandwidth allocation framework is presented, exhibiting intelligent traffic queuing for practically controlling the quality-of-service (QoS) of mobile traffic, backhauled via ...

    • Dynamic bandwidth assignment MAC protocol for differentiated services over GPON 

      Jiang, J.; Handley, M.R.; Senior, J.M. (2006)
      A dynamic bandwidth assignment MAC protocol is proposed to facilitate the upstream channel resource sharing and to support differentiated services over GPON. A new procedure for bandwidth reporting and a novel balance ...

    • Dynamic Subcarrier Allocation for 100 Gbps, 40 km OFDMA-PONs with SLA and CoS 

      Lim, Wansu; Kourtessis, Pandelis; Milosavljevic, Milos; Senior, J.M. (2013-04-01)
      The quality of service of 100Gbps orthogonal frequency division multiple access passive optical networks (OFDMA-PONs) performing dynamic bandwidth allocation is evaluated. New medium access control protocols and frame ...

    • An efficient inter-site interference model for 4G wireless networks 

      Amate, Ahmed; Sofianos, Stratis; Milosavljevic, Milos; Kourtessis, Pandelis; Senior, J.M. (Institute of Electrical and Electronics Engineers (IEEE), 2013-12-01)
      Due to the large number of wireless cells that are required for accurately evaluating inter-site interference in cellular networks, computational resources often pose a considerable limitation. In this paper, a novel method ...

    • Efficient T-CONT-agnostic Bandwidth and Wavelength Allocation for NG-PON2 

      Kourtessis, Pandelis; Lim, Wansu; Merayo, Noemi; Yang, Yeon-Mo; Senior, John (2019-07-01)
      Dynamic bandwidth and wavelength allocation are used to demonstrate high quality of service (QoS) in time wavelength-division multiplexed–passive optical networks (TWDM-PONs). Both bandwidth and wavelength assignment are ...

    • Flexible QoS Differentiation in Converged OFDMA-PON and LTE Networks 

      Lim, Wansu; Kanonakis, Konstantinos; Kourtessis, Pandelis; Milosavljevic, Milos; Tomkos, Ioannis; Senior, J.M. (Optical Society of America (OSA), 2013)
      We propose a Weighted-DSA scheduling algorithm which allows efficient mapping of LTE QCIs over the optical queues of an OFDMA-PON. A 63ms end-end wireless packet delay has been demonstrated for QCI5 at highest network loads

    • A full-duplex access network based on CWDM-routed PONs 

      Shachaf, Y.; Kourtessis, P.; Senior, J.M. (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      The application of polarisation-division-multiplexing in presented, demonstrating full-duplex transmission in an access network architecture employing RSOA-based ONUs. Modelling of a single coarse-AWG OLT to transmit ...

    • Full-Service MAC Protocol for Metro-Reach GPONs 

      Chang, C-H.; Alvarez, N.M.; Kourtessis, P.; Lorenzo, R.M.; Senior, J.M. (2010)
      An advanced medium access control protocol is presented demonstrating dynamic bandwidth allocation for long-reach gigabit-capable passive optical networks (GPONs). The protocol enables the optical line terminal to overlap ...

    • A G.984 GPON exhibiting multi-wavelength protocol functionalities 

      Gliwan, A.; Kourtessis, P.; Senior, J.M. (Springer Nature, 2010-01-01)
      A Gigabit Passive Optical Network (GPON) upstream-map frame- format enhancement has been developed to accommodate dynamic multi wavelength (DMW) transmission over splitter-based GPONs. Accordingly network functionality has ...

    • GPON dynamic MAC protocol to support differentiated services 

      Jiang, J.; Handley, M.R.; Senior, J.M. (Institution of Engineering and Technology (IET), 2006)
      The Gigabit-capable passive optical network (GPON) has become an attractive and promising solution for the broadband access network. In this paper a novel dynamic bandwidth assignment protocol is proposed to both facilitate ...

    • GPON Extended Wavelength Band Overlay 

      Senior, J.M.; Kourtessis, Pandelis; Gliwan, Ali (2009-06)

    • GPON MAC Protocol Simulation for Encapsulated Ethernet Traffic 

      Senior, J.M.; Jiang, J.; Handley, Michael (2005-07-05)

    • GPON service level agreement based dynamic bandwidth assignment protocol 

      Chang, C-H.; Kourtessis, P.; Senior, J.M. (2006)
      A dynamic bandwidth assignment protocol is proposed that demonstrates impartial and highly efficient bandwidth arrangement for gigabit-capable passive optical networks. In particular the novel algorithm automatically ...

    • A Hybrid Architecture for Federated and Centralized Learning 

      Elbir, Ahmet M.; Coleri, Sinem; Papazafeiropoulos, Anastasios K.; Kourtessis, Pandelis; Chatzinotas, Symeon (2022-09-01)
      Many of the machine learning tasks rely on centralized learning (CL), which requires the transmission of local datasets from the clients to a parameter server (PS) entailing huge communication overhead. To overcome this, ...

    • A hybrid space-time and collaborative coding scheme for wireless communications 

      Ma, M.; Masoud, E.; Sun, Y.; Senior, J.M. (Institute of Electrical and Electronics Engineers (IEEE), 2005)
      The paper addresses space-time coding techniques for broadband wireless communications. A brief overview of the space-time block coding and collaborative coding multiple access (CCMA) techniques is presented. A new coding ...

    • Integrated Wireless Optical Networking 

      Milosavljevic, Milos; Kourtessis, Pandelis; Senior, J.M. (2009-09-04)
      The interoperability of wireless and PON topologies is investigated to reduce deployment expenditure by means of centralised network management while providing ubiquitous access connections and mobility. In addition, the ...

    • Interoperability of GPON and WiMAX for network capacity enhancement and resilience 

      Milosavljevic, M.; Shachaf, Y.; Kourtessis, P.; Senior, J.M. (2009)
      The interoperability of standard WiMAX and GPON is shown to overcome the wireless spectrum congestion and provide resilience for GPON through the use of overlapping radio cells. The application of centralised control in ...

    • Low-cost MIMO-RoF-PON architecture for next-generation integrated wired and wireless access networks 

      Dahawi, T. H.; Yusoff, Z.; Salleh, M. S.; Senior, J. M. (2021-03-01)
      Next-generation integrated fiber-wireless access networks will require low-cost and high-capacity deployment to meet customer demand. A new configuration of radio over fiber--passive optical network (RoF-PON) architecture, ...