A protocol for WDM star coupler networks

Kannan, B.; Fotedar, S.; Gerla, Mário

doi:10.1109/infcom.1994.337528

Cited by 6 publications

(7 citation statements)

References 4 publications

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“…There has been significant work in the area of optical LANs and MANs using WDM. The vast majority of the proposed architectures consider star topologies, where some type of switch, router, or other type of hub, is placed in the center of a topology and each node is directly connected to the hub ([MB99, HRS93, LK93, MHH98, NT90, LA95, Gui97, SR96, CG89, GK91, LGK96, YGK96, HKS87, SGK87, Meh90, JU92, GG94, BSD93, CG99, Dow91, MJS00, WH98, SG00, HKR · 96, GCJ · 93, KFG92,CDR90]). These star architectures usually involve a passive optical broadcast star.…”

Section: Introductionmentioning

confidence: 99%

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A Network Management Architecture for Robust Packet Routing in Optical Access Networks

Médard¹,

Lumetta²,

Li³

2001

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We describe an architecture for optical local area network (LAN) or metropolitan area network (MAN) access. The architecture allows for bandwidth sharing within a wavelength and is robust to both link and node failures. The architecture can be utilized with an arbitrary, link-redundant mesh network (node-redundancy is necessary only to handle all node failures), and assumes neither the use of a star topology nor the ability to embed such a topology within the physical mesh. Reservation of bandwidth is performed in a centralized fashion at a (replicated) head end node, simplifying the implementation of complex sharing policies relative to implementation on a distributed set of routers. Unlike a router, however, the head end does not take any action on individual packets and, in particular, does not buffer packets. The architecture thus avoids the difficulties of processing packets in the optical domain while allowing for packetized shared access of wavelengths. In this paper, we describe the route construction scheme and prove its ability to recover from single link and single node failures, outline a flexible medium access protocol and discuss the implications for implementing specific policies, and propose a simple implementation of the recovery protocol in terms of state machines for per-link devices.

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Section: Introductionmentioning

confidence: 99%

“…Another protocol aspect that we do not consider in this paper is the specific structure of the signaling for a control channel. Several methods and their performance, in particular in terms of scalability with the number of nodes and of delay, have been presented in [SG00,CZA93,KFG92,BM95,DG99].…”

Section: Introductionmentioning

confidence: 99%

A Network Management Architecture for Robust Packet Routing in Optical Access Networks

Médard¹,

Lumetta²,

Li³

2001

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“…We do not describe the requirements for the circuit switched service. In this section, we describe the reservation based protocol called Group TDM [7]. Since GTDM incorporates TDM and DAS protocols, we first briefly describe TDM and DAS schemes before discussing GTDM.…”

Section: Network Protocolsmentioning

confidence: 99%

“…In this paper, we analyze the performance of the GTDM (Group Time Division Multiplexing) [7] protocol (which includes as special cases two other protocols Dynamic Allocation Scheme (DAS) and Time Division Multiplexing (TDM) [4]) for use in the Optical Star network in the above architecture. We derive analytical expressions for the average delay experienced by the messages in the optical network using the above protocols assuming that the message arrivals at the OCI are modeled by a two state Discrete Time Markov Chain.…”

Section: Introductioiimentioning

confidence: 99%

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Protocols for an optical star interconnect for high speed mesh networks

Gerla¹,

Kannan²,

Palnati³

Proceedings of INFOCOM'95

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Optical networks can provide higher throughputs while high speed electronic networks possess the intelligence f o r network control and management. We present a two level high speed network architecture that combines the throughput advantage of optical networks and the intelligence of electronic processing. One level is a High Speed Mesh L A N which uses wormhole routing, source routing and hop-by-hop flow control mechanisms with mesh routers (asynchronous pipelined crossbar switches) t o provide a high speed electronic network. The second level is an optical star network interconnecting high speed Mesh networks distributed across metropolitan area distances. We obtain analytical expressions f o r the average message (worm) delays f o r the G T D M (Group T i m e Division Multiplexing) multi-access protocol (which includesas special cases TDM and DAS) f o r single-hop packet switching i n the optical network of such an architecture. W e use a two state Discrete Time Markov Chain to model the arrival of messages to the optical network. Results f o r both uniform trafic and non-uniform traffic are presented. Finally, a Modified Dynamic Allocation Scheme is presented for single-hop packet switching which handles the message as a unit rather than sending a message as several fixed sized packets.

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Lightweight Signaling and Efficient Coupling Heuristic for Optical Star Networks MAC Protocols

Gagnaire

1998

Optical Network Design and Modelling

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Several MAC protocols have been proposed to prevent collisions on passive optical star networks. Time Division Multiple Access (TDMA) is a simple way to guarantee conflict-free concurrent transmissions on such networks. Because it does not require any signaling, TDM efficiency is not distance dependant. However, TDM suffers from non negligible access delays under low load. To reduce this drawback, dynamic allocation schemes (DAS) such as the Random Sheduling Algorithm (RSA) or the Group Time Division Multiplexing (GTDM) have been proposed. Both of these mechanisms reserves slots on a packet-bypacket basis by means of a signaling channel. The capacity in bit/s of this signaling channel is directly related to the number of buffers used in each node. The parallel queueing strategy allows to reduce the signaling cost by using a small number of buffers in each node. In that case, coupling algorithms such as the Minimum-degree Vertex First Scheduling (MVFS) have been proposed to manage the packets enqueueing/dequeueing process. In this paper, we propose a new MAC protocol for passive optical star networks which cumulates the benefits of GTDM in terms of lightweight signaling with those of the MVFS algorithm in tl\rms of coupling efficiency. The performance of this new protocol is compared to other existing solutions by means of computer simulations. We also underline the disruptive influence of propagation delays on the DAS-type protocols efficiency.

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A protocol for WDM star coupler networks

Cited by 6 publications

References 4 publications

A Network Management Architecture for Robust Packet Routing in Optical Access Networks

A Network Management Architecture for Robust Packet Routing in Optical Access Networks

Protocols for an optical star interconnect for high speed mesh networks

Lightweight Signaling and Efficient Coupling Heuristic for Optical Star Networks MAC Protocols

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