Posts tagged: china-telecom

Next-Generation PON will Support at Least 40 Gbps Downstream

By admin, July 18, 2012 8:50 pm

What the next generation of fiber-to-the-premises networks will look like is becoming clear, now that members of the Full Service Access Network (FSAN) have reached an agreement on what they’re calling NG-PON2.

The agreement is not actually a standard, but instead outlines the direction that standards efforts will take, explained FSAN Chair Martin Carroll, who is also a distinguished member of the technical staff at Verizon?(News – Alert).

As FSAN considered the next generation of FTTP, various members proposed a wide range of approaches, including some that were “more elaborate and on the bleeding edge” and some that were “more current and readily available,” Carroll said.

Members ultimately settled on what they’re calling time and wavelength division multiplexing (TWDM) because the group believes that approach will meet target bandwidth and other requirements and can be developed relatively quickly. Standards could be ratified by as early as 2013 and products could be deployable by 2015, FSAN says.

Like today’s FTTP networks based on GPON, TWDM will rely on time division multiplexing but in addition will “use multiple wavelengths to stack TDM streams,” said Carroll.

The minimum bandwidth goal for an individual NG-PON2 is 40 Gbps downstream and 10 Gbps upstream, with total bandwidth shared among multiple subscribers. Noting that the current highest-speed PON, XG-PON, operates at 10 Gbps downstream, Carroll said the minimum target bandwidth levels should be easily reachable by using four wavelengths.

He added that systems with downstream bandwidth as great as 160 Gbps could be part of the standard, but he believes the 40 Gbps system will be considerably more cost effective.

The 40 Gbps requirement was driven by the per-customer bandwidth goal of 1 Gbps and apparently envisions each PON continuing to serve about 32 customers as with typical PONs deployed today. But bandwidth will not have to be allocated equally between all of the customers served from a single PON. Carroll believes network operators are likely to give residential customers service at rates below 1 Gbps, while business customer data rates will start around 1 Gbps.

Operators envision a wide range of use cases for NG-PON2, including support for mobile backhaul and potentially as a replacement for Sonet and SDH-based data services. Because NG-PON2 will use a point-to-multipoint approach, Carroll expects it to be more cost effective than point-to-point alternatives.

I asked Carroll whether the people creating the NG-PON2 standard would consider home run wiring – an approach that is gaining in popularity because some operators believe it is more future-proof than PON. Carroll said the emphasis is on PON, but he noted that the group also wants to have some wavelengths available for using WDM technology in more of a point-to-point configuration.

“It would be a PON architecture on the fiber side, but when you look at what the signal itself does, it would be more of a point-to-point allocation of the wavelength,” he said.

FSAN initially was primarily a North American organization dominated by the former RBOCs, but over the last decade it has become a much more global organization – and that reality has driven some of the requirements for NG-PON2. Carroll noted, for example, that NG-PON2 must co-exist not only with GPON, which has been widely deployed by Verizon, but also with XG-PON. The latter requirement was driven largely by China Telecom and China Unicom?(News – Alert), Carroll said.

FSAN expects to work through the International Telecommunications Union in creating the NG-PON2 standard – another example of the global nature of the technology. online casino .

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Edited by Braden Becker

PMC’s OTN Processors Enable Packet-Optimized Metro Optical Networks

By admin, May 31, 2012 4:58 pm

The increasing demand of transport capacity, multiple services?and end to end management to the network edge generates the need of Optical Networks product?that could offer cost- effective, flexible, converged solutions.

To address transport network requirement, PMC, a semiconductor innovator transforming storage, optical and mobile networks, has extended its leadership in optical transport with a second-generation HyPHY OTN processor?family that enables Metro OTN.

?With PMC’s?HyPHY 20Gflex?and?HyPHY 10Gflex, Metro OTN doubles packet efficiency and delivers the multiservice capabilities and scalability required for metro transport networks worldwide to cope with explosive growth in packet traffic.

?According to a press release, the HyPHY Flex devices offer OEMs with the lowest cost of development by enabling them to leverage a single device for both OTN-switched and DWDM lambda-switched optical transport equipment. Additionlly, the HyPHY Flex devices are ODU0-channelized Metro OTN processors that support the newly approved OIF?(News – Alert)-compliant OTN-over-Packet Fabric system interface, which is critical for enabling platforms to implement scalable OTN switching architectures.

“Metro transport networks are quickly evolving towards scalable OTN architectures in order to handle the growth in packet services,” said Mr. Zhang Chengliang, deputy chief engineer, Beijing Research Institute, China Telecom?(News – Alert). “Network operators need multiservice Metro OTN equipment that can address the wide range of OTN-switched and Lambda-switched network deployments that are ongoing globally.”

As Ethernet is becoming the access currency of choice,?Video and SAN client services are in growing demand, while TDM still represents an important revenue-generating service. Metro OTN now offers the fine-grain, variable-size, switchable containers required to achieve optimal network infrastructure efficiency for transporting GE, sub-rate 10GE, SAN and Video services.

The HyPHY Flex solutions are OTN processors that offer true Any-Port, Any-Rate, and Any-Service flexibility and to fully integrate both the packet mapping and packet timing functions necessary for Carrier Ethernet transport.

?In other company news, TMCnet reported that PMC will present “The Recipe for Successful 10G PON Networks” at OptiNet China on Thursday, May 31, 2012, at 2:30 p.m., in Beijing, China.

Edited by Brooke Neuman

OIF to Unveil New Ethernet and OTN Technology at its 2012 Global Event

By admin, February 16, 2012 7:31 pm

Currently, 12 companies that are members of the OIF (News – Alert) are conducting global interoperability tests of Ethernet services over OTN transport. All of this testing is leading up to a demonstration at the OIF 2012 Enabling High-Speed Dynamic Services event, which is taking place from March 6-8, 2012. Vendors participating in the interoperability test include AT&T, China Telecom (News – Alert) and NTT.

As carriers globally are migrating their networks away from SONET/SDH to Ethernet and OTN, the combination of the latter will enable operators to prepare their networks for rapid growth and volume while accommodating the continued use of the classic TDM technology. Sources say the OIF is one of the most important influencers in converging the two complimentary technologies and as a group, it continues to display the ability to come together and collaborate on new technology that will only improve the wireless and communications industry as a whole.

By testing the technology with multiple carriers within the OIF, it will allow these vendors to evaluate the tools and determine how to best integrate the new equipment into existing networks. The combination of Ethernet services and OTN transport is compelling and there is momentum in the industry to converge these technologies,” said Jim Jones of Alcatel-Lucent (News – Alert) and the OIF’s president and Networking Interoperability Working Group chair in a statement. Overall, the goal is to use Ethernet as the predominant access and client interconnect technology and OTN as the dominant transport technology.

New research also suggests the technology to combine the two is being developed at just the right time, as OTN is forecasted to show a strong growth in capabilities and revenue generation. 

According to Infonetics (News – Alert), sales of OTN switching equipment currently comprise only about eight percent of the OTN market, with more mature OTN transport equipment representing the remaining 92 percent. But that’s expected to change substantially over the next few years, as service providers get serious about deploying OTN switching.

OTN and Ethernet are a natural combination that will allow network technology to run more efficiently. And with the OIF testing it across multiple carriers, it will allow its service providers to analyze the technology and figure out how to integrate it into their own systems effectively, which will hopefully make it cheaper to apply these new technologies easily into everyday operations once the product is finished with its testing stage.

A recent graduate from the University of Oregon, Nick aspires to build a career in the digital world with a focus on technology, sports, and online media.

Edited by Jamie Epstein