Delay priorities enhance utilisation of ATM PON access systems

Angelopoulos, John; Boukis, G. C.; Venieris, Iakovos S.

doi:10.1016/s0140-3664(97)00082-0

Cited by 11 publications

(8 citation statements)

References 13 publications

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“…This D m parameter that must be kept low for both GPON and EPON is the starting point for understanding the DBA operation and more details can be found in an earlier study [3,[8][9][10][11]. While DBA has been well understood from studies in BPONs [12][13][14], EPONs triggered new research efforts and approaches tailored to their specific needs. A review of the most well-known mechanisms is provided in [15].…”

Section: Design Considerations For Efficient Support Of Dynamically Ementioning

confidence: 99%

Performance evaluation of GPON vs EPON for multi‐service access

Orphanoudakis¹,

Leligou²,

Kosmatos³

et al. 2008

Int J Communication

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SUMMARYRecently both ITU and IEEE have standardized solutions for passive optical networks (PONs) operating at gigabit per second line rates and optimized for the transport of packet-based traffic to improve the efficiency of previously standardized broadband PONs, which used the ATM cell as the data transport unit. The efficiency and performance of PON systems depend on the transmission convergence layer and mainly on the implemented medium access protocol. Although the latter is not part of the standards and left to the implementer, the standards describe a set of control fields that constitute the tool-set for the media access control (MAC) operation. Though starting from a common and quite obvious basis, the two standards present significant differences with the legacy of Ethernet marking the IEEE approach, while the emphasis of ITU is on demanding services. In this paper we compare the efficiency and performance of the two systems assuming the implementation of as close as possible MAC protocols. The target is twofold: assess and compare the traffic handling potential of each of the two standards and identify the range of applications they can support. Useful insight can also be gained to the MAC tools that could be designed into the next generation extra large WDM PONs.

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Section: Design Considerations For Efficient Support Of Dynamically Ementioning

confidence: 99%

Performance evaluation of GPON vs EPON for multi‐service access

Orphanoudakis¹,

Leligou²,

Kosmatos³

et al. 2008

Int J Communication

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“…The reservations in the HFC MAC use a request field piggy-backed in the upstream slot and are usually assisted by contention on special reservation mini-slots [4]. The latter is needed for the announcement of the first arrival of a burst since the piggy-back mechanism is not self-starting but relies on the existence of previous traffic for the announcement of new arrivals [6].…”

Section: Presentation Of the Mac Concept -Integration Aspectsmentioning

confidence: 99%

Performance Evaluation of Diffserv Driven HFC System

Pikrammmenos

Leligou

2000

Next Generation Networks. Networks and Services for the Information Society

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Abstract. Shared access networks such as hybrid fiber/coaxial and passive optical networks have emerged as promising ways to reduce the cost of the transition to a broadband access infrastructure and provide a graceful upgrade path towards the photonization of the local loop. The MAC protocol as the only arbiter of the upstream bandwidth directly affects the Quality of Service (QoS) provided to each upstream traffic flow and must meet several constraints. Such constraints include the adequate speed of operation, flexibility to support efficiently the largest number of services and applications offering an adequate number of QoS classes, and independence of higher layers, protocols and future extensions to traffic management specifications. The implementation of a MAC mechanism targeting these goals and aligned to the emerging Differentiated Services Internet strategy is evaluated using computer simulation results in this paper. The benefits of the adopted prioritization scheme to provide and guarantee different QoS levels are illustrated.

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“…Because of the much larger reservation delay and statistical behavior of the aggregations from many customers, special care must be taken to safeguard QoS to sensitive traffic. This requires a prioritization scheme integrated in the MAC function of PONs and HFC systems as was already identified in [5]. This must be in line with the recent advances in networking that include the two major approaches in offering multi-service broadband access enriched with differentiated QoS support namely the categorization of traffic classes by the ATM Forum [8] and the differentiated services (DiffServ) strategy of IETF [1].…”

Section: Introductionmentioning

confidence: 98%

“…A Medium Access Control (MAC) protocol is employed to arbitrate the access to the slotted common medium by allocating slots to customer terminations according to demand [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Access Control in Shared Access Networks Supporting Internet DiffServ

Angelopoulos

Leligou

Orphanoudakis

et al. 2001

IFIP Advances in Information and Communication Technology

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Abstract:Shared access networks such as hybrid fiber/coaxial and passive optical networks have emerged as promising ways to reduce the cost of the transition to a broadband access infrastructure and provide a graceful upgrade path towards the photonization of the local loop. The TDMA multiplexing of traffic entering such a system is governed by the MAC (Medium Access Control) protocol. which arbitrates the allocation of bandwidth to the shared feeder. At the same time the need to integrate telecom services presenting demanding quality requirements with plain Internet best-effort services over the same infrastructure. brings new issues to the design of such an access mechanism. The MAC protocol as the only arbiter of the upstream bandwidth directly affects the Quality of Service (QoS) provided to each upstream traffic flow and must meet several constraints. Such constraints include the adequate speed of operation exploiting in the highest degree the speed of H/W implementation. flexibility to support efficiently the largest number of services and applications offering an adequate number of QoS classes like the differentiated services (DiffServ)and independence of higher layers. protocols and future extensions to traffic management specifications. The implementation of a mechanism targeting these goals and its evaluation using computer simulation are presented in this paper.

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Delay priorities enhance utilisation of ATM PON access systems

Cited by 11 publications

References 13 publications

Performance evaluation of GPON vs EPON for multi‐service access

Performance evaluation of GPON vs EPON for multi‐service access

Performance Evaluation of Diffserv Driven HFC System

Access Control in Shared Access Networks Supporting Internet DiffServ

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