Long-term CAPEX evolution for slotted optical packet switching in a metropolitan network

Triki, Ahmed; Gravey, Annie; Gravey, Philippe; Morvan, Michel

doi:10.23919/ondm.2017.7958530

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…The transmission of optical packets between the bridge nodes does not pass through the switch node in order to avoid O/E/O conversions and hence, a relative reduction in energy consumption [8]. Capital expenditure (CAPEX) comparisons of WSADM technology with the optical packet switching (OPS) or optical burst switching (OBS) technologies indicate that WSADM could compete favourably with existing technologies in terms of cost, energy consumption and performance [10,11]. In the considered packet aggregation mechanism, multiple electronic packets or service data units (SDUs), e.g.…”

Section: Description Of the N-green Packet Aggregation Mechanismmentioning

confidence: 99%

Performance Evaluation of the Packet Aggregation Mechanism of an N-GREEN Metro Network Node

Atmaca

Kamli

Kuaban

et al. 2021

Modelling, Analysis, and Simulation of Computer and Telecommunication Systems

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Today's telecommunication network infrastructure and services are dramatically changing due partially to the rapid increase in the amount of traffic generation and its transportation. This rapid change is also caused by the increased demand for a high quality of services and the recent interest in green networking strengthened by cutting down carbon emission and operation cost. Access networks generate short electronic packets of different sizes, which are aggregated into larger optical packets at the ingress edge nodes of the optical backbone network. It is transported transparently in the optical domain, reconverted into the electronic domain at the egress edge nodes, and delivered to the destination access networks. Packet aggregation provides many benefits at the level of MAN, and core networks such as, increased spectral efficiency, energy efficiency, optimal resource utilisation, simplified traffic management which significantly reduces protocol and signalling overhead. However, packet aggregation introduces performance bottleneck at the edge node as the packets from the access networks are temporarily stored in the aggregation buffers during the packet aggregation process. In this article, we apply the diffusion approximation model and other stochastic modelling methods to analytically evaluate the performance of a new packet aggregation mechanism which was developed specifically for an N-GREEN (Next Generation of Routers for Energy Efficiency) metro network. We obtain the distribution of the packets' queue in the aggregation buffer, which influences the distribution of the waiting time (delay) experienced by packets in the aggregation buffer. We then, demonstrate the influence of the probability p of successfully inserting the packet data units from the aggregation queue to the optical ring within a defined timeslot ∆. We also discuss the performance evaluation of the complete ring by deriving the utilisation of each link.

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Section: Description Of the N-green Packet Aggregation Mechanismmentioning

confidence: 99%

Performance Evaluation of the Packet Aggregation Mechanism of an N-GREEN Metro Network Node

Atmaca

Kamli

Kuaban

et al. 2021

Modelling, Analysis, and Simulation of Computer and Telecommunication Systems

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“…As an example, a ring with 10-channel transponders would have the same capacity as 10 rings with single-channel transponders and would deliver a similar insertion latency (slightly shorter when using a reservation mode and slightly larger in case of opportunistic insertion). However, the cost benefits of using integrated WDM transponders and a single SOA for the 10-wavelength band, as discussed in [2], together with the benefit of managing a single ring, clearly favour WSADM.…”

Section: B Supporting Transport Level Performancementioning

confidence: 99%

“…The key optical devices required in a WSADM are integrated multi-wavelength laser sources that are fully in line with the trend of optoelectronic industry, and Semiconductor Optical Amplifiers (SOA) gates that are naturally suited to operate on WDM packets because of their wide optical bandwidth. Preliminary CAPEX comparisons have suggested that WSADM technology could compete favorably with existing electronic packet technologies and other OPS/OBS options [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Modelling packet insertion on a WSADM ring

Gravey

Amar

Gravey

et al. 2018

2018 International Conference on Optical Network Design and Modeling (ONDM)

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Abstract-The WDM slotted Add/Drop Multiplexer (WSADM) technology relies on time slotted WDM rings, where a slot can carry a single WDM packet. All stations can insert and receive these WDM packets. This differs from previous architectures in which packets were carried over a single wavelength, while multiple packets could be carried in a single slot, thus taking advantage differently of the WDM dimension. The WSADM architecture is expected to reduce costs by exploiting low cost technologies. We propose mathematical models for evaluating the performance offered by WSADM optical packet rings, under two different packet insertion policies. In the slot reservation mode, a station can only use the slots that are periodically reserved for its exclusive usage. In the opportunistic insertion mode, a station can use any slot that is neither reserved, nor already occupied. These modes are bench-marked with a channel reservation mode in which each wavelength is dedicated to a single station.

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“…Recently, a new WDM slot switching technology called WDM Slotted Add/Drop Multiplexer (WSADM), investigated in the ANR N-GREEN project, has been proposed for the 5G fronthaul/Xhaul networks [2], [3]. The WSADM technology of the N-GREEN project exploits the WDM transparency for the transit traffic to lower the cost of optical components and adopt off-the-shelf devices.…”

Section: Introductionmentioning

confidence: 99%

“…The WSADM technology of the N-GREEN project exploits the WDM transparency for the transit traffic to lower the cost of optical components and adopt off-the-shelf devices. The WDM slot technology (in which the data is carried simultaneously over 10 wavelengths [2]) has the potential to provide a low-cost [3] and performant fronthaul/Xhaul. However, the problem of the deterministic scheduling of isochronous (CPRI) traffic over a time slotted ring (such as adopted in N-GREEN), where each time slot starts after a fixed size inter-slot interval ("guard time", ), has not yet been solved.…”

Section: Introductionmentioning

confidence: 99%

Scalable deterministic scheduling for WDM slot switching Xhaul with zero-jitter

Ušćumlić

Chiaroni

Leclerc

et al. 2018

2018 International Conference on Optical Network Design and Modeling (ONDM)

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Abstract-A low-cost WDM slot switching "N-GREEN" network is studied for the Xhaul application. We assess the impact of inter-slot intervals on the jitter in N-GREEN and propose a deterministic scheduler ensuring a zero-jitter performance as needed by CPRI traffic. We also propose an integer linear program and a corresponding scalable heuristic and use these tools to evaluate the efficiency of the new scheduler within the N-GREEN technology. The results show important savings and improvements in cost, energy consumption, latency and jitter using N-GREEN w.r.t. state-of-the-art Ethernet Xhaul.

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Long-term CAPEX evolution for slotted optical packet switching in a metropolitan network

Cited by 8 publications

References 8 publications

Performance Evaluation of the Packet Aggregation Mechanism of an N-GREEN Metro Network Node

Performance Evaluation of the Packet Aggregation Mechanism of an N-GREEN Metro Network Node

Modelling packet insertion on a WSADM ring

Scalable deterministic scheduling for WDM slot switching Xhaul with zero-jitter

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