Dynamic Wavelength and Bandwidth Allocation in Flexible TWDM Optical Access Network

Hu, Xintian; Chen, Xue; Zhang, Zhiguo; Bei, Jinsong

doi:10.1109/lcomm.2014.2367119

Cited by 21 publications

(5 citation statements)

References 7 publications

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“…where 𝐿 𝑐𝑜𝑛𝑠 is set to 0.5 milliseconds. 𝑇 𝑝𝑟𝑜𝑐 is the processing time for each packet and is set to 1 𝜇s [20].…”

Section: Proposed Systemmentioning

confidence: 99%

Low Latency FiWi Enhancement with Tactile Internet on Passive Optical Network System

2022

IJIES

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Explosive growth and usage of internet while COVID-19 pandemic demands an access technology in our lifestyle that means the Internet of Things (IoT) and Passive Optical Networks (PONs) are increasingly being used in order to support the digital lifestyle. Mobile Internet allows us firstly to exchange the content of information and multimedia while on the move. Then, IoT makes it possible to connect the smart devices with the low latency. PONs have been suggested for providing the ultra-low latency for Quality of Service (QoS) applications such as the Tactile Internet (TI) that is the next evolution to enable real-time control of IoT. A one-millisecond round-trip delay is required to support the tactile internet. As stated on the improving bandwidth allocation for PONs and Passive Optical LAN (POLAN), we propose the FiWi-Dynamic Wavelength and Bandwidth Allocation (F-DWBA) algorithm to reduce the round-trip delay at lower than one-millisecond, which the proposed F-DWBA algorithm based on the PONs and WLAN 802.11b should have a maximum performance. The lowest round-trip delay will make the Fiber-Wireless (FiWi) system can work efficiently and support TI applications. Simulation setup are tested on the latency budget of communication for the TI system starting from the Mobile Unit (MU) through the access point (AP) connected to the Optical Network Unit (ONU) including with the Optical Line Terminal (OLT) to the server. Performance analysis is focused on three periods of the latency time at the optical access network, radio interface and MU interface. Simulation results show that the proposed F-DWBA algorithm has a better round-trip delay than the Gigabit-Passive Optical Network (G-PON) standard about 40 percentage and better than the conventional Dynamic Wavelength and Bandwidth Allocation (DWBA) algorithm about 33 percentage at the full working of the tactile internet system.

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“…where 𝐿 𝑐𝑜𝑛𝑠 is set to 0.5 milliseconds. 𝑇 𝑝𝑟𝑜𝑐 is the processing time for each packet and is set to 1 𝜇s [20].…”

Section: Proposed Systemmentioning

confidence: 99%

Low Latency FiWi Enhancement with Tactile Internet on Passive Optical Network System

2022

IJIES

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“…T eqd 125 μs × 125 μs in Eq. (14) represents the minimum polling cycle. M l asked and M l min are used in Eq.…”

Section: To Calculate T Lmentioning

confidence: 99%

“…, for ∀ T-CONT: (18) Even in that case, it is worth highlighting that there will still be a remaining bandwidth available for transferring additional data R l rem due to the rounding off performed by the ceiling function in Eqs. (14) and (16). To fully utilize wavelengths, R l rem is distributed to T-CONTs using…”

Section: To Calculate T Lmentioning

confidence: 99%

See 1 more Smart Citation

Efficient T-CONT-Agnostic Bandwidth and Wavelength Allocation for NG-PON2

Kourtessis

Lim

Merayo

et al. 2019

J. Opt. Commun. Netw.

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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 performed on the basis of transmission containers (T-CONTs) and therefore by means of upstream service priority traffic flows. Our medium access control (MAC) protocol therefore ensures consistency in processing alike classes of service across all optical network units (ONUs) in agreement with their QoS figures. For evaluation of the MAC protocol performance, a simulator has been implemented in OPNET featuring a 40 km, 40 Gbps TWDM-PON with four stacked wavelengths at 10 Gbps each and 256 ONUs. Simulation results have confirmed the efficiency of allocating bandwidth to each wavelength and the significant increase of network traffic flow due to adaptive polling from 9.04 to 9.74 Gbps. The benefit of T-CONT-centric allocation has also been measured with respect to packet delay and queue occupancy, achieving low packet delay across all T-CONTs. Therefore, improved NG-PON2 performance and greater efficiency are obtained in this first demonstration of T-CONTs allocated to both wavelength and time.

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“…Because the adaptive transceiver is included in the FCN, the communication between FCN and CN is a critical problem. In addition, due to the channel resource in the metro segment is limited [20], the multi-channel scheduling algorithm is employed to maximize the utilization of channel resource. Moreover, ring wavelength scheduling will be used in this paper.…”

Section: The Ms-vpon In Maonmentioning

confidence: 99%

Multi-channel scheduling algorithm for multi-subsystem-based VPON in metro-access optical network

Xia

Gan

et al. 2016

Optical Switching and Networking

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In the metro-access optical network, a multi-channel scheduling algorithm is proposed for multi-subsystem-based virtual passive optical network (VPON) that can implement the syncretism of multiple systems such as time division multiplexing-PON (TDM-PON), wavelength division multiplexing-PON (WDM-PON), orthogonal frequency division multiplexing-PON (OFDM-PON) or their hybrid PON technologies. Through a module named adaptive transceiver, this algorithm can be directly applied in the metro segment with the reuse of original deployment in the access segment. The algorithm can be employed to schedule wavelength and subcarrier resource in WDM/TDM subsystems and WDM/OFDM subsystems respectively. Centralized management is used in the algorithm to facilitate channel scheduling and algorithm implementation. An optimal scheduling length is derived in the algorithm to realize the maximization of channel-utilized ratio. Two cases are investigated to demonstrate the effectiveness of the proposed algorithm in the channel-utilized ratio.

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Dynamic Wavelength and Bandwidth Allocation in Flexible TWDM Optical Access Network

Cited by 21 publications

References 7 publications

Low Latency FiWi Enhancement with Tactile Internet on Passive Optical Network System

Low Latency FiWi Enhancement with Tactile Internet on Passive Optical Network System

Efficient T-CONT-Agnostic Bandwidth and Wavelength Allocation for NG-PON2

Multi-channel scheduling algorithm for multi-subsystem-based VPON in metro-access optical network

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