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How ARM processors are enabling a massively parallel neural network |
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New Electronics - Cover Story - July 2010
For someone who has spent his working life in computing, Professor Steve Furber has taken his time before alighting on the human brain as a topic for research.
His interest in alternative modes of computing started in 1998 after two decades of chip design and computer science. "I'd spent 20 years in conventional computing and, in those years, computers got an awful lot faster, but there were still things they couldn't do; interesting things," said Furber, ICL Professor of Computer Engineering at the University of Manchester.
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How multiple cores are improving data processing efficiency |
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New Electronics - July 2010
Cavium Networks has long adopted multicore architectures for its communication processors. Its first generation Octeon Plus features a 16 cpu device. Now, with its Octeon II family, it has hiked the number of MIPS64 v2 risc cores it uses per chip to 32. According to market research group, The Linley Group, this should provide a 400% processing performance increase over the 16 core Octeon Plus.
Octeon II was first detailed a year ago with the CN63xx family. Two additional families have now been announced: the CN67xx, with 8 to 16 cores; and the CN68xx with 16 to 32. "The CN67xx has two memory controllers, whereas the CN68xx has four," said Venkat Sundaresan, senior product line manager at Cavium Networks. "If you need 40Gbit/s [line rate], you take the CN68xx. If you need 20Gbit/s and you don't want to pay for the extra performance, you go for the CN67xx."
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How new coding approach helps optical systems to hit 100Gbit/s |
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New Electronics - May 2010
There are several reasons why engineers are working harder when designing high capacity optical systems – higher data rates mean fewer photons per optical pulse and there is greater signal dispersion. Adding to the challenge, service providers want the reach of 40 and 100Gbit/s systems to match that of existing networks designed for 10Gbit/s lightpaths.
"The optical signal to noise ratio goes down 10dB as line rates go from 10Gbit/s to 100Gbit/s," said Michael Scholten, strategy and technology manager at Vitesse Semiconductor.
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Adding access intelligence |
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NE Nov 2009
Service providers continually upgrade their networks, but as soon as they tackle one problem, another arises. Given the rapid clip at which broadband traffic is growing, it is the access network that is demanding the operators' attention.
For wireless, uptake of 3G dongles and smart phones means operators are upgrading cellular sites to backhaul rapidly growing mobile broadband traffic. Meanwhile, the capacity of fixed broadband links to the home is also on the rise and broadband rates of 50 and 100Mbit/s are becoming common. Such traffic growth is leading to subtle changes in the access network.
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Deep packet inspection: Up close |
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Total Telecom - April 2010
Mobile operators could deploy innovative new services by using deep packet inspection technology, but the business models could still be some way off.
Deep packet inspection promises to make mobile operators smarter in how they manage fast-growing data in their networks. But the technology will likely play a more fundamental role impacting expenditure and income, particularly once the Long Term Evolution (LTE) standard is widely adopted.
Industry analysts believe operators must follow the path of enabling new revenue-generating services, making the transition from flat-rate bandwidth-on-demand to tiered service offerings. Deep packet inspection (DPI) vendors claim operators already are highlighting such an interest in request-for-proposals.
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Mobile operator SK Telecom talks next-gen wireless |
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A Q&A with Seho Park, manager, network strategy team at South Korean mobile operator, SK Telecom
Q: What is the main issue regarding moving to new wireless technologies such as LTE/LTE Advanced and WiMAX?
SP: Regarding evolution to a next-generation network, we, as an operator, have to consider locating new equipment with existing infrastructure to enhance efficiencies and data throughput. Thus we need to develop engineering technology in areas such as architecture distribution and relay station applications to minimize coverage holes while pursuing such co-existence.
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