1,721,014 research outputs found
ANALYTICAL EVALUATION OF IMPROVED TRANSMISSION TECHNIQUES IN DEFLECTION ROUTING NETWORKS
No full textThis paper presents improvements of existing analytical techniques to evaluate the performance of non-priority deflection routing networks in uniform traffic. Pure ghot-potato in a ShuffleNet topology will be presented for three polite-access techniques: Transmit-no-hold, Transmit-Hold and No-Head-of-Line-Blocking
New structures of the optical node in transparent optical multihop networks using deflection routing
No full textNovel single-receiver/single-transmitter/single-buffer node structures for ultrafast two-connected multihop transparent optical packet-switching networks with deflection routing are introduced. A Shufflenet topology in uniform traffic is used as a benchmark to compare several shared optical memory schemes and their control algorithms. These simple structures minimize the number of crossbar switches needed at each optical node and have moderate control complexity, while still yielding large throughput and small delay. The minimization of the number of crossbar switches results in an improved optical power budget. An analytical model, obtained by an extension of the existing theory, provides a design tool to search for efficient node control strategies that minimize the number of deflections and packet misses for each constrained node structure
NEW STRUCTURES OF THE OPTICAL NODE IN TRANSPARENT OPTICAL MULTIHOP NETWORKS USING DEFLECTION ROUTING
No full textNew single-receiver/single- transmitter/single- buffer node
structures for two-connected multihop transparent optical
packet-switching network8 with deflection routing are introduced.
A ShuBeNet topology an uniform trafic is adopted
to compare various shared optical memory schemes and
their control algorithms. These simple structures minimize
the number of crossbar switches needed at the node
and have moderate control complexity, while still yielding
high throughput and low delay. Analytical results are obtained
by an estension of the existing theory and verified
by simulation
Analysis and comparison of hot-potato and single-buffer deflection routing in very high bit rate optical mesh networks
No full textThe steady state behavior of regular two-connected
multihoP networks in uniform traffic under hot-Pobto and a
simple single-buffer deflection routing technique is analyzed for
very high bit rate optical applications. Manhattan Street Network
and ShuffleNet are compared in terms of throughput, delay,
deflection probability, and hop distribution both analytically and
by simulation. It is analytically verified that this single-buffer
deflection routing technique recovers in both networks more than 6O% of the throughput loss of hot-pohto with respect to store-and-forward when packets are generated with independent
the average message length exceeds 20 packets.
destinations. This gain, however, decreases to below 40% when the average message length exceeds 20 packets
Novel packet architecture for all-optical ultra-fast packet switching networks
No full textHeader recognition and packet detection in all-optical networks
using on/otT optical ultrafast signalling at a fixed
wavelength can be implemented by means of recently demonstrated
optical sampling AND gates. A novel packet structure
in which the header is spread in a TDM fashion over the
optical packet allows the number of such AND gates to be
minimised in the routing and receiving blocks thereby best
exploiting the required electronic
CHANNEL LIMITATIONS IN ULTRA-FAST MULTIHOP ALL-OPTICAL SOLITON NETWORKS
No full textNon-regenerative ultra-fast packet switching networks are severely constrained by the optical channel. Limitations on the maximum achievable bit rate and network physical size are presented when soliton pulses are used in a ShuffleNet network with deflection routing
MINIMUM LOSS NODE STRUCTURES FOR DEFLECTION ROUTING TRANSPARENT OPTICAL NETWORKS
No full textNew node structures with a single transmitterheceiver (TW
RX) using single-buffer deflection routing' are proposed here
for two-connected slotted multihop networks
Design and channel constraint analysis of ultra-fast multihop all-optical networks with deflection routing employing solitons
No full textRegular two-connected multihop transparent optical
networks using ultrahigh bit-rate single-wavelength on/off
keying are addressed. A novel solution for packet and node
architecture is introduced to take full advantage of the recently
demonstrated optical samplers and of the electronic processing
capability. Channel transmission error arguments show how the
size of these nonregenerative networks employing deflection
routing is limited for a given optical bit rate. These limits are
quantified for the Manhattan Street Network and ShuffleNet
employing solitons. An upper bound on network performance in
terms of maximum achievable bit rate and throughput for a
given packet error rate is evaluated by taking into account the
soliton self-frequency shift due to Raman scattering, the jitter
due to amplified spontaneous emission noise, the short-range
interaction, and their interplay. Results show that if the packet
error rate is to be bounded below 10^-6, the node-to-node fiber
span cannot exceed a few kilometers for network sizes greater
than 64 nodes when the optical bit rate is as high as 100 Gb/s
Self-clocking scheme for bit synchronization in ultrafast packet switching transparent optical networks
No full textA challenging issue in ultrafast packet switching transparent
optical networks is fast acquisition of synchronisation at the
bit level for packet demultiplexing. In the Letter a novel
scheme is proposed, in which a timing reference is transmitted
along with each data packet in the form of a clock comb.
This comb is extracted at each node reached by the packet
Tor header recognition and, at the destination, for reading oi
that particular packet. The synchronisation problem IS
solved with no need for a phase locked loop, at the expense
of an increased effective packet length
Throughput limitations in ultra-fast all-optical soliton mesh networks using deflection routing
No full text- …
