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6 posts categorized "Chano Gomez"

An Update from Lantiq's Director of Business Development, Chano Gomez at CES 2011

January 18, 2011 8:01 PM in Chano Gomez , Lantiq  | 0 comments  | 0 TrackBack

During the Consumer Electronics Show in Las Vegas, I caught up with Lantiq's Director of Business Development, Chano Gomez, who gave an update on recent product announcements and vision of Lantiq expanding its business beyond the Access Network and the CPE markets, and into the wired home network, with G.hn technologies.


Two Audio Interviews at CES 2011 on #Ghn - Matt Theall / HomeGrid Forum & Intel and Chano Gomez / Lantiq

January 07, 2011 3:01 PM in CES 2011 , Chano Gomez , Matt Theall  | 0 comments  | 0 TrackBack

During CES 2011, I'm doing video and audio interviews.  The video part takes time to edit and post, but the audio interviews post instantly and are meant to be shorter snippets and overviews of what's new with G.hn at CES.  I'll be posting the video interviews over the weekend.

Here's  Matt TheallHomeGridForum's President and Intel Technology Strategist

Here's Lantiq's Director of Business Development, Chano Gomez:



The Chano Gomez Interview Re: Lantiq's Family of Chips Supporting Global ITU-T G.hn Standard for Home Networking Applications

January 03, 2011 10:01 PM in Chano Gomez , Lantiq  | 0 comments  | 0 TrackBack

Lantiq has just announced a chip new family supporting the ITU-T G.hn Home Networking standard.  Lantiq XWAY™ HNX devices will provide manufacturers of consumer, computing and smart home electronics with the foundation for in-home networks that can be connected using any combination of phone, power and cable wiring.

Screen shot 2011-01-03 at 4.11.15 PM
I had a chance to catch up with Chano Gomez, Director of Business Development for the company.

Q: Why did Lantiq go into G.hn?

Well, Lantiq is one the leading suppliers of chips for voice and broadband applications. We started first providing chips for the equipment that goes into a Telco Central Office (CO): things like voice lines, ADSL or VDSL ports, etc. We later entered the business of Customers Premises Equipment (CPE), again including ADSL, VDSL and voice, but also GPON, DECT, Ethernet, etc.

The next logical step for us was to go beyond the CPE, and to get into the business of chips for home networks. We made two acquisitions that gave us quick access to both wired (G.hn) and wireless (802.11n) home networking technologies - as we knew that both would be key building blocks needed by our customers.

Q: But why G.hn and not some other wired technology?

When we started looking into the wired home networking market, we realized that it was heavily fragmented, with multiple technologies that (a) didn't work with each other and (b) only addressed specific market segments (like powerline networking only, or coaxial networking only).

G.hn solved both problems at the same time: (a) it's an international standard (ITU-T has hundreds of Telcos as members, and it has a long history of developing standards that are quickly adopted by Telcos around the world) so it could facilitate interoperable products from multiple vendors, and (b) it could work across any physical medium.

The last part (working in any medium) makes it very attractive for silicon vendors, because it reduces your risk thanks to market segment diversification. Designing a new chip is very expensive, so you want to make sure you'll be able to use that chip in as many different markets as possible. Today, only G.hn gives you that kind of diversity. Using the same chip in multiple markets provides advantages not only to us, but also to our customers - who can benefit from economies of scale.

Q: You mention that you see G.hn as an extension of your access business. How did that influence the way in you conceived your G.hn product?

It had a huge influence. One of the main goals for us was to ensure that we could offer to our service provider customers all the features that they are used to have in their access networks. Things like remote management, strict QoS policies or automatic crosstalk management - they all have these tools today in their access networks, but in general they are not available in today's home networks. So we have put a lot of effort on enabling these features in our new HNX product line, and you can see that in some of the technologies we are introducing, like XWAY(™) STREAM or XWAY(™) Probe.

Q: One of the biggest trend during 2010 was the move to mobile devices, tablets, and many applications that rely on wireless technologies. Is this the right time to invest in non-wireless technologies?

First of all, let me clarify that we don't see G.hn as competing with wireless technologies. Quite the opposite, we see them as complementary in many ways. Let me give you two examples:

First example: WiFi extenders. These are small wireless access points that you can install anywhere in your home where you get a weak signal from your main access point (the one in your broadband router). How is this WiFi extender connected to your router? With a wired connection, usually power wires. This is a nice example of how a wired technology like G.hn can help you get a better wireless experience in your home.

A second example is the concept of using wired G.hn networks to offload your wireless network. If your wireless network is heavily loaded with data intensive transmissions from your Network Attached Storage, or a Netflix video stream, you may have little bandwidth left for your iPhone or iPad. If, on the other hand, you use a wired connection like G.hn for your data intensive applications, then your wireless network will have more capacity available for your handheld devices.

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Guest Blogger, DS2's Chano Gomez Writes: Top Ten Things You Need to Know About the New G.hn Standard

May 16, 2009 1:05 AM in 802.11n , Alan Weinkrantz , Chano Gomez , DS2 , EveryWire , EveryWire.com , G.hn , Home Networking , Wired Home Networking  | 0 comments  | 0 TrackBack

DS2's Chano Gomez, contributes this post which is re-published by permission from his company's blog.

Readers of this blog already know that G.hn (also known as G.9960) is the new standard developed by ITU (the same group of experts that developed the highly succesful ADSL, VDSL and VDSL2 standards) for high-speed networking over existing home wiring (power lines, phone lines and coaxial cable). We have written about how fast G.hn is, about the various organizations that support G.hn, and about the major applications targeted by G.hn.

What we have not done before is providing a comprehensive overview of the most important advantages provided by the standard. So, that's the goal of this post.

#1: G.hn is faster than any existing wired home networking technology

G.hn will be fast. As we detailed in this post ("How fast can G.hn be?"), with its default setting G.hn can provide a line data rate over coaxial cable of up to 843.75 Mbps (with actual Ethernet throughput at 762.05 Mbps), and includes optimizations that can support line data rates up to 1.02 Gbit/s.

This does not mean that all G.hn products will operate at 1 Gbit/s. In fact, it's very likely that initial products will support lower data rates, and that future products will increase the maximum data rate, all without having to change the standard and without breaking interoperability.

Not only that: G.hn supports the concept of "profiles", which will allow silicon vendors to design devices with lower complexity and lower data rates for specific applications. We will see G.hn-compatible devices for applications like Energy management and Home automation, operating at low data rates, while maintaining compatibility with high-speed G.hn products.

#2: G.hn works over any type of home wire

Unlike other specifications that only support one type of wire (power lines only, or coaxial cable only), G.hn specifies a unified Physical Layer and Data Link Layer that can operate over multiple wire types (power lines, phone lines and coaxial cables).

This blog post ("Why do we need a unified standard at all?") explains the benefits of having a single PHY/MAC standard for multiple wires, and why Service providers have pushed for G.hn to support it.

Does that mean that G.hn will not be optimized for any specific wire? No. In fact, G.hn includes parameters that are specifically optimized for each medium. For example, key elements of the PHY/DLL, such as OFDM sub-carrier spacing, the Forward Error Correction (FEC) or the ARQ(retransmission) mechanisms.

G.hn will outperform any of the existing wired home networking technologies over any medium.

#3: G.hn is supported by multiple silicon vendors

Unlike with existing wired home networking technologies, which traditionally only have had a single silicon vendor providing actual products (severely limiting customer choice), multiple silicon and IP vendors (including DS2) have already announced support for the G.hn standard in their future products. And we are not talking about start-ups here. These are serious vendors who have shipped several millions of chips into the home networking and DSL markets.

Having multiple silicon vendors offering interoperable G.hn products will create healthy competition in the marketplace, will accelerate technical innovation and will ensure that customers get the best products at the best possible price.

#4: G.hn is supported by multiple Industry Groups

HomeGrid Forum is the organization set up specifically to promote adoption of G.hn and to ensure interoperability and compliance with the standard.

But HomeGrid Forum is not the only organization supporting G.hn: On February 2009, three home networking organizations that promoted previously incompatible technologies (CEPCA, HomePNA and UPA), announced that they had agreed to work with Homegrid Forum to promote G.hn as the single next-generation standard for wired home networking, and to work to ensure coexistence with existing products in the market.

#5: Most products based on G.hn will provide compatibility options with existing home networking technologies

G.hn, by itself, is not directly interoperable with existing wired home networking technologies. There is a reason for this: there are at least 5 completely different legacy specification. As this article says ("On the issue of G.hn's FEC"):

If G.hn tried to be compatible with all of the existing wired technologies that have shipped millions of devices into the market, then it would have 5 different modulation schemes, 5 FEC schemes, 5 security schemes, 5 MACs, 5 of everything. That would be the best way to make it the most complex standard ever designed. But G.hn is about simplicity (one PHY and one MAC that works anywhere) so the group decided early on that they didn't want to follow that path.

So, what about the installed base of existing products? Do we have to replace them? Fortunately not. Those G.hn vendors with an installed base of legacy home networking technologies have announced plans to develop "dual mode" chips that will be compatible with G.hn and with legacy specification. DS2 was the first vendor to announce this, which means that products based on the UPA specification will interoperate with future G.hn products from DS2.

#6: G.hn provides state-of-the-art security

G.hn uses AES-128 as the encryption algorithm, and ITU Recommendation X.1035 as the protocol for authentication and key exchange. G.hn security is very strong (much stronger than that provided by many existing systems based on DES and 3DES), and provides an additional advantage to system designers over many other home networking technologies: G.hn products don't need to support a plethora of legacy encryption mechanisms (unlikeIEEE 802.11 products, which usually need to support multiple security schemes, such as WEPTKIP and CCMP).

Having fewer options also means better security, as there are fewer chances to introduce bugs in G.hn implementations.

#7: G.hn will have longer range than most existing home networking technologies

G.hn includes a nice feature specifically designed to extend the range of the network: relaying. Although DS2 products based on the UPAspecification have supported this feature for many years, most existing wired technologies do not support it.

Automatic relaying is a key technology for wide area networks such as Broadband over Powerline networks deployed over utility power lines.

Using this feature, a G.hn "source node" can use an intermediate "relay node" to send data to another "destination node", even if the source and destination nodes are not within direct reach from each other. This feature improves network reach and will allow G.hn to be used in large installations.

#8: G.hn will reduce energy consumption

G.hn will include mechanisms that will allow devices to go into "sleep state" in order to reduce energy consumption and to quickly get back to "active state" as soon as a device needs to send data.

Advanced support for "sleep states" are required to support the latest European Code of Conduct on Energy Consumption of Broadband Equipment.

#9: G.hn will provide reliable communication over noisy home wires

G.hn includes multiple mechanisms to improve reliability over any kind of wire. Of the three wires supported by G.hn, power lines are probably the harshest ones, so the G.hn group has spent a significant amount of time optimizing performance for that case.

How does G.hn handle reliability over noisy power lines?:

  • Forward Error Correction (FEC): G.hn uses a state-of-the-art LDPC code to protect data transmission. Before transmission, LDPC codes add redundancy to the data, which is then used by the receiver to recover the contents of the data even if some of the bits have been corrupted by noise. G.hn selected LDPC (over other options) because it provided the lowest Block Error Rate over the expected range of operation, and because LDPC decoders are easier to implement at high data rates due to their inherent parallelism (which is one of the reasons why LDPC is also used in other high data-rate standards like 10GBase-T Ethernet)
  • Selective ARQ: G.hn implements an ARQ (Automatic Repeat Request) mechanism that re-transmits data frames that have been affected by too many errors.
  • Synchronization with the AC cycle: Noise in powerline is frequently synchronous with the AC cycle. This means that if the AC cycle has a frequency of 60 Hz, noises generated by electric appliances also have a frequency of 60 Hz, or some times twice that (120 Hz). If a device detects a strong noise spike, it's very likely that the same noise spike will show up 1/60 = 16.6 ms later. A G.hn device can take advantage of this and schedule its transmission to avoid this "predictable" noise.

#10: G.hn will provide predictable service to QoS-sensitive applications such as IPTV

Many existing wired (and wireless) networking systems use Medium Access Control mechanisms based on variations of CSMA/CA. One of the advantages of CSMA/CA is its simplicity, but this comes at a cost: because CSMA/CA is collision-based, performance of CSMA/CA-based systems is very dependent on network load and QoS in general cannot be guaranteed. Systems like CSMA/CARP improve this by introducing priority-based access, but the problem still persists when multiple system with the same priority want to use the channel at the same time.

The G.hn MAC is based on a master/slave TDMA architecture, in which a central device ("the domain master") allocates channel access to other "slave" nodes in a predictable manner. Slave nodes can request specific allocations of bandwidth to the domain master, which can implement them by assigning exclusive "contention-free" time slots to each slave.

With this mechanism, G.hn can provide guaranteed bandwidth and latency to applications that have strict QoS requirements, such as IPTV, VoIP or on-line gaming.

The Everywire Conversation with Chano Gomez, DS2

January 14, 2009 7:01 AM in Chano Gomez  | 0 comments  | 0 TrackBack

Here's Chano Gomez, VP Technology and Strategic Partnerships, for DS2, sharing his thoughts on the future of G.hn and wired home networking.

Interesting Article on G.hn in EDN today....

January 11, 2009 11:01 PM in Chano Gomez , DS2 , EveryWire , EveryWire.com , G.hn , Wired Home Networking  | 0 comments  | 0 TrackBack

Found an interesting article on G.hn in EDN today.Picture 3

It goes into some interesting technical details about G.hn that I haven’t seen elsewhere. It provides a pretty good high level summary of the technology. 

Click here to read it.

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