Network Technology

There are a few major trends that I have noticed for the home and small-business network at this year’s Consumer Electronics Show. But the big names like D-Link and NETGEAR had chosen to run private showings of their products in the many hotels around Las Vegas rather than use the Convention Center.

Wireless networking

The 802.11ac Gigabit wireless network standard has been ratified and a lot of the manufacturers are showing prototype chipsets and endpoint devices for networks based on this standard. TRENDNet had shown a router and a client bridge as a proof of concept for a wireless link on this standard and D-Link had registered interest in developing their 802.11ac implementation.

On the other hand, Belkin, D-Link and Engenius ran with premium “N900” routers as their top-shelf models. These are simultaneous dual-band routers that run three data streams on each of the two Wi-Fi bands with a total theoretical throughput of 450Mbps per band. 

As well, TRENDNet had tried their effort at another of those “universal Wi-Fi range extenders” which is a device class that could cause some mistakes.

Coaxial and Powerline Networking

MoCA have brought their TV coaxial-cable network specification up to 2.0 which allowed for a headline speed of 400Mbps with Broadcom showing a system-on-chip that works with this standard. They were pitching it at the set-top-box market, especially for multi-room cable-TV deployments.

On the other hand, HomePlug PowerLine Alliance have made the HomePlug AV2 specification official. This standard, which is interoperable with HomePlug AV powerline network segments can support MIMO / repeater operation for a robust powerline segment as well as allowing for a Gigabit physical-layer bandwidth for this segment. The former MIMO advantage makes it that each HomePlug AV2 node acts as a repeater and can take data from two or more nodes for higher throughput even with ropey mains circuits.

But there have been more of the HomePlug AV 500 devices being exhibited on the floor; including D-Link’s DIR-1565 “three-way” router which supports a network of 802.11g/n Wi-Fi, Gigabit Ethernet and HomePlug AV 500.

Also, the IEEE 1905.1 standard has been officialised thus simplifying the setup and management requirements for small networks that use Wi-Fi, Ethernet, HomePlug or MoCA network media or a combination thereof. It also provides a consistent quality-of-service arrangement for data that passes through the different network media.

Routers

Some of the manufacturers were pitching at the idea of “cloud-enabling” their routers. This was to allow for remote management of these devices or to allow the router to become an Internet-enabled file server. There was also some talk about setting up app platforms for routers, but what could this lead to for the evolution of these devices.

D-Link have launched the DIR-505 which is a 802.11g/n Wi-Fi plug-in travel router which also had the ability to work as an access point and file-server.

Network-Attached Storage

TP-Link had used this show to launch their first NAS unit which was a DLNA-capable 2-bay SATA unit with Gigablt Ethernet connectivity as well as 3 USB ports. It even had the ability to copy from USB to NAS at the touch of a button.

Iomega had refreshed their StorCenter NAS lineup by adding a surveillance-camera NVR functionality and making them easy to setup. This also included improving their cloud-storage functionality. They also introduced the EZ Media & Backup Center which was their entry-level home-user NAS which supported easy-setup operation and backup, iTunes / DLNA media serving and support for Iomega’s Personal Cloud and Iomega Link technology.

Broadband Internet

ViaSat, who provide the satellite backhaul for JetBlue’s inflight Internet service, were intending to launch a satellite broadband service for rural America this year. They wanted to use this show to exhibit their proposed service. This service is intended to be speed-competitive with the fastest terrestrial broadband services in the cities and is to be known as Exede.

The throughput is at a headline speed of 12Mbps download / 3Mbps upload and they are offering packages with monthly rates US$49.99 for 7.5Gb data allowance, US$79.99 for 15Gb data allowance and US$129.99 for 25Gb data allowance.

Conclusion

This year, the Consumer Electronics Show in Las Vegas was about estalishing a connected home lifestyle across all of the main activity centres ranging from the home office to the lounge area and that the TV is now a legitimate part of the connected lifestye.

Articles (French language – best resources)

Dossier -Test du Freebox Server | DegroupNews

Freebox Revolution – Test du Freebox Player | DegroupNews

From the horse’s mouth

Freebox Home Page – Free (France – French language)

My comments

Typically, the kind of equipment supplied to consumers by telecommunications carriers and Internet service providers for “triple-play”or similar Internet services has typically been drab in design and functionality. This is typically to work to the lowest-common denominator with both price, functionality and style.

The situation is very different in France where there is a lively competitive market for “triple-play”Internet service. Most urban or regional centres in this country are “dégroupée” for multiple competing ADSL-service operators. Here, these operators have access to the customers’ telephone lines as cable without paying France Télécom for a dial-tone service. There is also a steady rollout of fibre-optic service by the competing service providers for next-generation broadband Internet, with an overlaying requirement to provide competitive access to the ducts and poles for the fibre-optic service.

One of these major players is Free who have established a triple-play service for many years. Their latest iteration of the “Freebox” is now a benchmark for anyone offering a similar setup, whether in France or anywhere else.

I have previously covered the Freebox Révolution  in HomeNetworking01.info when a recent firmware update was released that integrated it with Apple’s ecosystem. As well, I have researched many French and English-language resources to learn more about this system.

The Freebox Révolution system

This system, like other triple-play setups offered in France, comprises of an Internet-gateway device, known as a “box”, and a set-top-box, known as a “décodeur”. These units have typically been interlinked by an Ethernet cable or user-supplied HomePlug kit, but is connected through a pair of “Freeplugs” which combine a power supply and a HomePlug-AV-Ethernet bridge in one box.

The units are a statement of industrial design in a similar way that Bang & Olufsen equipment are still a statement in this regard for consumer audio-video equipment. Both the Internet-gateway device and the set-top box have been designed by Phillippe Starck, known for extraordinary designs like the Parrot Zikmu network-enabled speakers or some of the LaCie external hard drives or network-attached storage systems.

Internet Gateway Device (Freebox Server)

This device consists of a broadband router, network-attached storage, VoIP ATA with DECT base station and audio player in one box.

It has a dual-WAN interface for either an ADSL2 service or an FTTH fibre-optic service. But the LAN functionality is one of the hallmarks of a cutting-edge device. It has 4 Gigabit Ethernet switched ports for Ethernet client devices as well as an access point for an 802,11n three-stream 450Mbps Wi-Fi segment. I mentioned previously that this unit also supports a HomePlug AV segment through the use of the supplied Freeplug adaptors. The Wi-Fi access point can also work as a separate “hotspot segment” for other Free subscribers.

The VoIP functionality works with an integrated analog-telephony adaptor and a DECT base station that you can associate 8 DECT cordless handsets with. These will provide full functionality with CAT-iQ DECT handsets.

The 250Gb NAS can work with the regular file-protocol suspects (CIFS, FTP, HTTP) but can work as a DLNA media server. It also works as a “staging post” for FTP, HTTP and BitTorrent downloads, the latter function being described as a “seedbox”. The recent firmware upgrades also implemented Apple TimeMachine support for incremental MacOS data backups. Of course, there is USB connectivity for 2 devices as well as eSATA connectivity for an external hard disk.

There are integrated speakers for playing media held on the hard disk, the Internet or an Apple AirPlay network but you can use it as an elementary amplified-speakers setup by connecting a Discman or iPod to its AUDIO IN jack. Of course you can play the music through better powered speakers or an amplifier using the AUDIO OUT jack.

This router is totally UPnP to the hilt with UPnP Internet-Gateway-Device for hands-free setup with Skype, games, MSN Messenger and the like; as well as being a UPnP AV / DLNA media server. Free could do better by integrating something like TwonkyMedia which can allow content discovery on metadata other than the file-system tree.

Let’s not forget that the Freebox Server is IPv6-ready as expected for a future-proof device. This is being augmented by the fact that ADSL Free subscribers in zone dégroupée aras or FTTH Free subscribers can have an IPv6 connection now.

Set-Top Box (Freebox Player)

This unit has an integrated Blu-Ray player with Blu-Ray 3D support (after new firmware added) as well as a digital-TV / IPTV set-top box / PVR. It connects to the TV via an HDMI connector or a SCART cable, both offering that “single-pipe” connectivity between the Freebox and the TV. Of course, there are connectivity options for other audio-video setups like SPDIF optical; and you can connect USB peripherals like SD card readers to this unit for direct viewing.

It is controlled via a gyroscopic remote control but has a supplied game controller as an alternate input device. Of course, you can connect a USB keyboard and mouse to it as extra input devices or control it from your iPad using the Freebox Connect app.

One drawcard in my opinion is that it is a fully-fledged Internet terminal with access to an app store, namely the FreeStore app store. This allows you to download games and similar “lean-back” apps; as well as view the Web or check email from your couch. Just of late, this set-top box has had YouTube support baked in to its latest firmware update.

You can now use the Freebox Player and its associated sound system or television’s speaker to play material from your iTunes software or iOS device using AirPlay. This at the moment applies to audio content only.As well, you can discover and play content held on DLNA-compliant media servers on your network including the Freebox Server’s hard disk.

Plans and Pricing

You can equip that French home or apartment with this device for € 29.90 per month. This gives you inclusive unlimited telephone telephone calls to standard phone services in most countries (Europe, Francophone countries, US, Australia, NZ, etc); and mobiles in France.

The Internet service would be up to 28Mbps while you have access to most basic TV service. Pay €1.99/month extra for 185 additional TV channels while you can service another room with Free’s TV service for €4.99/month extra with a simple set-top box or another of this Freebox Player for €9.99/month extra.

Existing Free subscribers can upgrade for €199.99 less €30 for each year they have been with Free.

The prices are obtained from Free’s latest tariff charts available on their site and would appear to be ridiculously low for people who live in a country that doesn’t have a lively competitive broadband-Internet market.

Conclusion

What I see of the Freebox Révolution is a system of equipment for a home network that is all about an Internet service provider offering a future-proof attractive cutting-edge piece of equipment rather than offering second-rate equipment to their customers.

This is primarily driven by a country who is behind a really competitive Internet service market for consumers and that the competition is driven on value rather than the cheapest price possible.

Article

BBC News – Mobile web users at the end of their tether

My comments

This article is pointing to a common practice amongst most US and European mobile-phone carriers concerning the tethering of mobile phones.

What is tethering?

This is where one uses a mobile phone as a wireless 3G modem for another computing device like a laptop computer or a tablet. It can be done wirelessly using a Bluetooth link or the phone operating as a wireless router when certain software is run. On the other hand, it can be done simply by connecting the phone to the PC using a USB cable and running a driver set on the PC.

Why tether than use a separate modem

Tethering has an advantage over using a separate modem to service a device’s data needs. Here, one doesn’t have to manage different data plans for each device – the mobile phone, the tablet computer or the laptop. Instead, they can work with a larger plan that is shared amongst all the devices.

Laptop users also benefit from tethering. This is because, unless they have a 3G-enabled laptop, they only need to think of one device i.e. the mobile phone rather than making sure they have a 3G USB or ExpressCard modem with them.

The common practice with mobile carriers

Most of the US phone carriers like AT&T or Verizon, as well as some of the European carriers treat the tethering as a distinct “wireless-modem” usage compared to using a phone for integrated Web browsing. Here, they insert premiums for this usage in to their tariff charts for this kind of usage and the US carriers even implement software to discourage tethering unless the user subscribes to a plan that specifically allows tethering.

My experience with Telstra

I have maintained a mobile phone service with Telstra since 1997, working through six subsidised-handset contracts over this period.

Last year, before I went to Sydney, I went to a Telstra store to ask about my data options with respect to my then-current phone contract, Here, I asked about whether I should tether my handset to my laptop or buy a 3G “stick” either as an extra service on my bill or as a prepaid service. They suggested that I consider tethering and increase my plan’s data allowance and I had paid for the extra data allowance.

Here, Telstra offered lower-allowance data plans as part of their mobile phone plans but allowed customers to “buy on” more data allowance. Here the tariff charts don’t discriminate between using your phone as a modem for another device and using the phone as its own Internet terminal. This is although they sell a range of 3G “sticks” and “MiFi” devices alongside the mobile phones.

I didn’t need to do anything to the phone to enable tethering and was able to be sure it worked on a “utility” laptop that I had and was intending to take to Sydney. This was before I was lent the Dell Inspiron 15r laptop which I reviewed as part of the trip. Here, I had made sure that the Inspiron had the necessary drivers for the phone before I had left.

Recent steps with some European carriers

Some European carriers have taken the same step that Telstra has been doing for the many years. That is to modify the tariff charts to remove the distinction between tethered (modem) and handset-specific data.

It is to cater for the reality that the same device uses the same bandwidth whether it is for its own use or another device’s use.

Tethering can benefit the carrier as well

Mobile-phone tethering provides a financial benefit for the carriers as well as a utility benefit for the users. Here, it allows the carrier to see increased per-service revenue. Typically this can be brought about by customers increasing their data allowances in the same way that I did – buying on extra data capacity to their plans where the tariff chart allows.

This is although most customers don’t “burn up” their call or data allowances that they pay for. Rather, if they anticipate extra use, they would increase the allowances. One reason is to allow the customers to budget for a predictable amount for their communications.

Tethering and the Internet-enabled car

When one starts to think of Internet-based infotainment like listening to Internet radio while driving or Internet-driven synchronous traffic-status updating for navigation systems, one would think of how they get the data to the vehicle.

I had touched on this previously in the article about Internet radio in the car and have mentioned that tethering a mobile phone to a vehicle’s infotainment system would be one of the pathis. Infact it may be a logical path as Bluetooth is used to facilitate handsfree calling in the vehicle.

Conclusion

What I would see is that tethering shouldn’t be treated different from phone-specific use and that users should be aware of this as an alternative to operating separate modems and accounts.

Article

Wi-fi replacing Ethernet? An expert weighs in on the possibilities | SearchNetworking.com

My Comments

After reading the short article by Lisa Pfifer in SearchNetworking.com, it has enforced my line that I have run concerning Wi-Fi vs Ethernet as a primary network technology. She had looked at the issue from the corporate network angle and had found that Wi-Fi hasn’t yet reached the standards of Gigabit Ethernet and that Ethernet suits servers and other applications where there is sessile equipment being expected to provide high-reliability service. She also emphasised that Wi-Fi networking is RADIO and is prone to the same reliability issues that affects radio-based networks.

I have encompassed the HomePlug powerline-based network technology as a no-new-wires wired-network option and support the technology on this site and its use in this way.

For the home network, I would agree, especially in the context of the home entertainment applications. These applications are typically served by equipment that is normally expected to be sessile, like the large television set or its video peripherals; and the best enjoyment of audio or video content is provided if there is smooth continuous playback through the viewing session. Most, if not all, networked home-entertainment equipment would have an Ethernet socket for wired-network connectivity and I would find it more appropriate to use an Ethernet link or HomePlug powerline link to connect this kind of equipment to the home network.

As far as the small business is concerned, I would use Ethernet for normally-sessile applications like point-of-sale terminals, desktop computers and network printers while using Wi-Fi wireless for applications that are intended to be mobile like laptop computers or tablets. Some of you may find HomePlug technology can also serve temporary setups involving fixed computer hardware such as sale-specific supplementary point-of-sale terminals.

Of course, the building that the network is used in often determines the reliability and quality of a Wi-Fi wireless network. Examples of this include thick brick or stone walls, reinforced concrete and use of reflective-foil insulation and double-glazing.

It is definitely an example of a different reality to what the industry, especially the consumer computing and electronics industry wants us to believe, where Wi-Fi wireless technology is the “way to go” for networking.

Wi-Fi wireless networks are to complement wired network technology!

I have talked with a few cafe owners regarding the idea of implementing or maintaining public Wi-Fi Internet access at their premises and have been observing how the different premises have taken on this issue. As well, I have read articles on the topic of the cafe or bar becoming an increasingly-relevant business and social place in most cities. Most of these establishments may consider the provision of public Internet access more as a way of adding value to their service especially in a crowded marketplace.

Some of you may already have public Wi-Fi Internet service in place thanks to either a neighbouring business that you are friendly with or a “hotzone” run by the local government or a private entity.

The usual mitigating factors that affect the use of a public Wi-Fi hotspot in that cafe or bar may include the size and layout of the public areas. A small cafe may put off that idea due to a small public dining area with lots of furniture. Similarly the location of the premises to regular public transport (regular rail, tram / light-rail or regular bus service) may affect its worth for this feature due to the fact that the commuters would use this facility to do email updates before they head on their journey.

One cafe owner who has a hotspot may notice that there may be more reliance on certain traffic types and drivers to cause more patronage and make the use of a hotspot worthwhile. He cited the existence of apartment blocks as being a key driver due to the residents seeing the cafe as a “second lounge room” due to the typical flat (apartment) having a very small lounge area. Another driver would be tertiary education or small offices operating nearby, where the cafe serves as the “second office”. This would include people who work from their homes and use these places for their meetings.

Factors that may be of concern:

The space and layout of the public area can be a key factor. A wireless hotspot may work against smaller premises where there is a lot of furniture in the public area. This is because of the fact that there is an increased likelihood of personal luggage like laptop bags or briefcases ending up in the thoroughfares.

Another factor is the prevalence of smaller living or working premises near the location. Here, this could support the provision of a hotspot due to the cafe or bar being seen as a “second lounge room” or “second office” because of the size of the living or working area in the customers’ own areas. This may be already factored in to your business’s direction especially as development takes place in the neighbourhood concerning these kind of premises or as a significant employer sets up shop nearby.

Yet another factor that affect your idea of implementing or maintaining a public wireless Internet service would be the proximity of the premises to regular public transport. This may be based on a tram or regular full-time bus service passing your door or a rail station for a commuter-rail or mass-transit service being a few minutes walk from your door.

As well, you may also factor in the kind and frequency of your traffic. This may include whether you have your traffic arriving mainly through weekdays or weekends.

On the other hand, some cafe and bar operators may find that a Wi-Fi hotspot may attract “nuisance technology traffic” who may affect the mood of the cafe or bar. This traffic may manifest in the form of people playing games with loud sound-effects, teenagers or young people playing YouTube videos or latest downloaded music with the sound turned up loud, or customers using their laptops for long videoconferencing sessions. It may also attract “mooching” where customers exist in the premises for a long time, using the facilities but without ordering any food or drink or infrequently ordering low-value food and drink.

Surveying your traffic

It may be worth observing the kind of traffic you have before committing to a public Wi-Fi service so you can have best use. One way would be to observe and count particular traffic types through a sample period of a month or two months. Here you would notice the number of traffic that fits certain types as well as the value of the spend caused by that traffic through their stay.

Traffic types:

There are two different technology-user traffic types to look for when assessing the volume of traffic that uses technology.

Business traffic

These are people who are using your premises to do business. Typically they are equipped with a briefcase or similar case and will use a laptop computer. They may also be equipped with various business documents, paper notebooks or similar items.

This traffic will end up in two sub-classes – one where there is a meeting between two or more people; and another where the person works alone at the table or bench, going through notes or typing / writing up the material. The latter person may come about after a meeting where one of the participants want to “do their homework” from that meeting away from the office.

Leisure portable computer users

These people use the portable-computer technology for personal use at your premises. This will typically be in the form of email, Social Web (Twitter, Facebook, etc), games (Angry Birds, etc), researching leisure-activity information (movies, concerts, etc), videoconferencing (Skype) or personal video viewing (YouTube, etc).

They may typically be younger users who may be alone or with a group of friends and be clutching on to consumer notebooks or tablet computers like the iPad.

What to factor in

When you plan for a hotspot or want to attract “technology-equipped” traffic, there are certain issues worth considering

One factor would be the premises capacity. This encompasses the seating capacity and layout in both indoor and outdoor areas. Here, technology users will come in with briefcases or other luggage that houses their technology and this can get in the way of the traffic flow. Similarly, the premises needs to have proper access to restrooms which can allow for increased traffic.

It may also be worth investigating additional power connections in the public area such as spare power outlets so that clients can charge their technology devices or run the devices on AC while at the premises. This may also involve using high-capacity powerboards when connecting lights or appliances to power outlets in the public area and anchoring these powerboards to the wall using their keyhole sockets.

Of course, it is worth finding out from your regular clients about how they would accept this traffic that would be caused by the proposed hotspot. Of course some of the regular clients may be portable-technology users themselves and may want to benefit from this kind of access themselves.

Conclusion

This article may be of interest and use to cafe or bar owners who are thinking or have thought about the public Wi-Fi Internet service as part of the service mix for the business. It does explain what issues may be of concern as part of providing the service and whether the service may be right for the business.

Please feel free to leave comments after this article about your experience with planning for, setting up or operating public Wi-Fi internet service in your cafe or bar. If you are reading this in the HomeNetworking01.info Facebook Page, you can leave comments on that page after the article. As well, please lave the name of your cafe or bar in the comments that you leave and / or provide a Web link to your establishment’s homepage in the Web link field so I can see it is from the establishment who has the insight.

Articles

HomePlug® Powerline Alliance Announces Support for IEEE P1905 Convergent Digital Home Network Standard – HomePlug Powerline Alliance

IEEE P1905 Standard page

My Comments

Realities

More home networks implementing two or more media backbones

As the typical home network evolves, there will be a time when another interface type will be implemented in that network.

There are two examples of this common situation. One is where a person who has run an Ethernet network from the network-Internet edge to their computer decides to “go wireless” with their laptop computers and upgrades to a wireless router yet maintains the Ethernet connection for desktop computers. Another example that is increasingly common in Europe and will become so with the prevalence of IP-delivered TV would be a household that has a Wi-Fi network for the laptop but implements a HomePlug powerline network to serve the set-top box or IP-enabled TV in the lounge.

Infact I have advocated these kinds of network setups in this site in order to encourage a flexible home or small-business network that suits all situations that are thrown at it. This includes handling radio-difficult environments like double-brick walls or foil-lined insulation that can exist in many houses.

Network endpoint devices with multiple network interfaces

An increasing number of network-endpoint devices like computers, printers and Internet media devices are being required to support multiple types of network interfaces. This may be provided out of the box; or the user may have to install a hardware network adaptor for a particular network interface in to the device even though the device has an integrated network adaptor for another interface.

A very common example that I have seen for myself is laptop users switching between a wired Ethernet connection and a Wi-Fi wireless connection. Typically the laptop user who is getting used to the “New Computing Environment” and what it offers will plug their computer into the router’s Ethernet socket while they work at their desk; then disconnect from the Ethernet socket and “go wireless” when they want to use the laptop in other parts of the house. This typically can cause problems due to network storms or switchover problems; and often requires the user to disable or enable Wi-Fi on the laptop as they change connections.

Similarly, most of the network-enabled multifunction printers that I have reviewed at HomeNetworking01.info are equipped with an Ethernet socket as well as an integrated WPA2-secured Wi-Fi interface. This is becoming very common with most network-enabled media players, especially “smart TVs” and BD-Live Blu-Ray players.

Setup and management difficulties with these networks

These networks can yield their fair share of difficulties as users have to set up each network segment or device for secure reliable operation. This can include initial provisioning needs that a media type has like SSID and WPA-PSK security keys for Wi-Fi segments to management of segment-specific problems like Wi-Fi reception issues.

It will become more difficult as advanced networking requirements such as quality-of-service, synchronous media streaming, multiple logical networks and robust security are required out of these small heterogenous networks.

In the case of the devices, it will include making sure that the device works with the best network interface available even if both interfaces are physically connected. The most common example of this is making sure that the Wi-Fi-enabled laptop or printer works on a wired link if connected to the network via that link and works with the Wi-Fi link in other cases without the need for a manual switchover procedure.

What is this new standard intending to provide

You may think that there are standards out there to help with managing a computer network but most of these standards work to a particular network media type. As well, a lot of them require management by an IT team, something which few households or small businesses can have on hand all the time.

One major benefit is simplified media-level control across different media types on the same network. This isn’t achieved through the use of higher-level configuration routines managed by IP or application-level protocols like SNMP or UPnP, but these protocols can be adapted for this standard.

There will also be a focus on end-to-end performance such as allowing a device to choose the network interface that provides best throughput and quality-of-service. It can also allow “end-to-end” quality-of-service to be achieved from the network-Internet “edge” to the end device for IP telephony, multimedia streaming or Internet gaming.

Similarly, there is the ability to manage the media-level network security and energy-management needs that are required for the network in an easier form. This includes coordinating device wakeup across different media types so that a device can exist in an energy-saving quiescent mode yet “come to” when someone else on the network need it no matter how it is connected.

This standard recognises the reality that no one network type suits all needs, different horses for different courses.

Here, a typical setup may use Cat5 Ethernet as a high-speed backbone between floors or across the house, a HomePlug AV segment as a high-reliability wired “no-new-wires” setup for temporary applications and a Wi-Fi wireless segment that is primarily for portable devices.

The main focus that will be achieved is that bridge or switch devices that work across the multiple media types can perform these jobs more efficiently without needing to use higher-level protocols to achieve this goal; and be assured that the requirements for the network data are met as the data travels these devices.

Unanswered questions

Support for and management of VLAN networks

An unanswered question about this standard is whether it can support a VLAN network. This is a network that hosts multiple logical networks across the same physical infrastructure. It would be relevant in the small network space for “guest / hotspot networks” and IPTV setups where end-to-end content protection is required.

Features that may be considered of importance in this regard include replicating VLAN setups across the network as infrastructure devices are added to the network. An example of this could b to use an extension access point to “build out” a Wi-Fi network yet maintain the “guest network” and the “private network” as separate entities with separate SSIDs.

It also includes multi-tenancy-building environments where there is common “LAN” network infrastructure like cable runs that exist to interlink units (apartments, shops, offices, etc) or multi-SSID access points installed to service common areas (common gardens, swimming pools, food courts, etc). Here, it would be required to establish a VLAN interlink between two or more premises under the control of the same entity or establish a link to a common multi-SSID access point with the same SSID and security parameters as your main access point.

Wi-Fi devices and their operating mode

Another questiom that may affect the management of Wi-Fi devices is what kind of operating mode the device should be in. This is whether it is a client device or an access point; or to implement “direct link” or WDS or newer-standard network repeater functionality.

This would cater for an increasing number of “multi-function” access points which was a trend brought about by newer firmware versions for the Linksys WAP54G wireless access point. Here, the access point could be set up to be on the end of a direct wireless link, or be a client bridge for an existing Wi-Fi segment, a Wi-Fi repeater as well as being an access point.

This standard could provide support for a wireless endpoint such as a "multi-function” access point or the Wi-Fi functionality in a printer or other device to work as a client device or as an access point. It could then allow for these devices to quickly serve as infill access points when they are connected to a wired backbone after working on the Wi-Fi network.

Conclusion

At least the IEEE P1905 standard will make some effort towards making the establishment, management and development of the typical heterogenous small network become an easier talsk that is less painful.

Product Page

Netgear WN3000RP

My Comments

There has been some increased Internet publicity about Netgear’s WN3000RP “universal range extender” which is intended to extend Wi-Fi coverage in to a network’s dead spot. Devices like this one are billed as being able to work with any 2.4GHz Wi-Fi network segment such as an ISP-supplied “Internet-network edge” wireless router.

But these devices work in a particular manner that may cause problems with network use. Here, they work as a wireless client bridge to the existing network and set themselves up as a Wi-Fi access point that is its own “extended service set” or Wi-Fi network segment. Most of these devices will typically have an Ethernet connection for use with Ethernet-ended network devices like PCs, network printers or games consoles and work as a Wi-Fi client bridge for these devices.

What can go wrong

Positioning in the wireless network

There is infact a lot that can go wrong in setting up and using these devices. One issue is how the device is positioned in the master wireless segment that is to be extended. You have to locate these devices just off the fringe of that wireless segment in order to avoid unreliable service from the client devices on both network segments. Usually, you would have to keep an eye on two indicator lights – one which shows reception quality relative to the master wireless segment and one which shows the quality of the wireless segment created by the device.

Operation of Wi-Fi client devices

As well, users will need to make sure that their laptop computers, smartphones or other devices point to the SSID associated with the range extender. In the case of the Netgear device that is set up using WPS to the “master segment”, the SSID will be a combination of “master_segment_SSID” + “_EXT”; like “BIGPOND-1234_EXT” for a hypothetical Telstra-supplied Wi-Fi router whose SSID is “BIGPOND-1234”. Of course, the WPA security parameters will be the same as that for the “master segment”. It may also require users to make sure their devices “latch on” to the SSID that is strongest for the area they are in; which may be a problem with laptop computers running some desktop operating systems; or some network devices like some Internet radios.

Bandwidth availability and advanced Wi-Fi setups

Another factor that is also worth considering is that the data bandwidth available in this newly-created segment will be smaller that that available in the master segment due to the device working from a weaker point of the master segment. Of course, never expect these devices to offer advanced network behaviour like client isolation for use with hotspots or support for multi-SSID access points for example. With the latter example, these devices will only work with one of the SSIDs available from these access points.

WPS network setup

A key point of confusion that can occur with Netgear’s wireless range extenders is the way the WPS “push-to-connect” function works. These devices have one WPS button on their control surface, which handles associating with the “master segment” or associating with a client device on its own segment. When you set up the range-extender for the first time with a WPS-enabled access point or router on the master segment, you are meant to press this button on this range extender to start the WPS cycle then press the button on the WPS-enabled access point to complete the process. Then you enroll a WPS-capable client device on this range extender’s segment by starting the WPS-configuration process on that device then pressing the WPS button on this range extender. What can happen is that a person who is enrolling the client device could press the button on the range extender before starting the WPS-setup process on the client and this could make the device assume it is connecting to another master segment rather than enrolling the new client.

What could be done to make these devices better

Firmware that suits multi-function operation

Of course the current firmware with these devices prohibits using them as a “pure” Wi-Fi access point with a wired backbone to the network. This is although they work properly as an access point for the new segment with the Wi-Fi “master segment” as their backbone. Rather, I would prefer that these devices have a “multi-function” firmware in place which allows at least three operation modes: a wireless range extender with one wireless segment as the backbone and another covering the area; a wireless access point with a wired backbone; and a wireless client bridge serving Ethernet-connected devices.

Improved designs could use a hardware switch that selects between the operation modes. This can then lead to a logical foolproof WPS operation mode with the WPS button only used for enrolling client devices in modes other than “Client Bridge” whereupon it would be used to enrol with the master segment. The user would be required to set the unit to “Client Bridge” mode when the want to establish a wireless backbone, then set the unit to “Range Extender” mode for operation as a range extender with a distinct satellite segment.

Improved WPS operation

Similarly, these devices could have improved WPS-button logic such as a “long press” for setup with a master segment and a “short press” for client setup. This can avoid further operation complications due to someone who intends to enrol a client device causing these range extenders to “hunt” for new master segments and affecting access to the network by established devices.

Conclusion and my opinion on these devices

If I was to extend the coverage of a wireless network segment, I wouldn’t necessarily use the wireless backbone method that is encouraged with these devices. Instead I would use access points run off a wired (Ethernet or HomePlug AV) backbone. This would then make sure that there is the full bandwidth available across the coverage of the network

Articles

Understanding gigabit Wireless LAN: 802.11ac and 802.11ad

My comments

What is it all about

At the moment, 802.11n on both the 2.4GHz and 5GHz wavebands is the current link standard for the Wi-Fi wireless network. But the IEEE have decided to work on standards for providing increased-bandwidth wireless networks.

The two standards are 802.11ac, which will primarily work on the 2.4Ghz and 5GHz radio bands and be seen as a migration path from the current 802.11n technology; as well as 802.11ad which works on the 60GHz waveband and has a very short range. The latter technology would be considered best for peer-to-peer applications like short-range wireless backhaul.

Both of these systems will use MIMO (Multiple Input Multiple Output) radio technology; a “front-end diversity” system with multiple transceivers which is what the 802.11n network uses. But this technology will work with at least four “front-ends”; known as “4×4” due to four signals coming in and four going out.

Dedicated bandwidth options

One major benefit that I see with these technologies will provide is dedicated-bandwidth wireless networking which each access point compliant to these standards can do. This is brought on through the use of MU-MIMO (Multi-User Multi-Input Multi-Output) Here, it extends “transmit beamforming” technology which provides improved signal quality in an 802.11n network to allow the access point to provide “switched” Wi-Fi with dedicated bandwidth to stations; similar to the way the typical wired Ethernet network works.

It may be an improvement for network setups with many SSIDs per access point like so-called “guest / hotspot” + “private” networks, shared hotspot access points or many university networks; by allowing full bandwidth to each SSID.

The realities

Of course, the actual throughput that a network link will achieve will typically be less than headline link speed due to overheads associated with the link’s transmission requirements. Here, the average real world maximum throughput will be 867Mbps and the figure may be quoted for first-generation equipment or mature-generation equipment.

How it affects my small network

What will be asked of a small network like a home network would be a 5GHz segment that provides the 802.11ac network.

It may provide for dedicated throughput to client devices like laptops or tablet computers. For those networks that run as dual networks like hotspots or guest networks that share the same wireless router as the private network,the dedicated throughput for each wireless-network segment will be a bonus.

Of course, 2.4GHz will still be used as an 802.11n segment for existing devices and there may be a compatibility mode so that existing 802.11n devices can operate on the same segment.

Other issues

If the 802.11ad technology is to be used as a wireless-backhaul for many 802.11ac access points, there will have to be work on a complementary mesh-network technology. It will then provide a level of fault-tolerance in the wireless backhaul as well as a chance for each station to have and pass on full bandwidth networking. This is something that the IEEE standards body are working on with the 802.11s draft standard.

Conclusion.

It therefore shows that when there is a standard in place, there will be a chance to “raise the bar” with the technology that it covers. This will mean that a Wi-Fi wireless network could become close to the goal of a switched Gigabit network.

Article

HP Intros The First Wi-Fi Mouse For Your PC | eHomeUpgrade

From the horse’s mouth

HP Introduces Wireless PC Accessories to Enhance the Computing Experience

Click here to play YouTube video

My Comments

This mouse is the first to use the Wi-Fi technology as a “personal area network” i.e. to use a network technology to connect peripherals to a host computer. At the moment it requires the host computer to run Windows 7 and implement the “virtual network adaptor” technology in its Wi-Fi chipset.

Furthermore, the host computer needs also to run a device-monitor applet supplied by HP with this mouse. This whole functionality could be improved through the use of code being integrated in Windows 7.

This mouse is expected to have a 9 month battery life which is meant to be longer than with devices that run current Bluetooth technology. I would see that as a coup for Wi-Fi when it comes to applications ranging from mice and keyboards to other “sensor and control” applications like barcode readers used in business; remote controls or health-monitor devices. As well, if the chipsets used in this mouse are implemented in smartphones, PMP / MID devices (iPod Touch, etc) or tablet computers, this could help with improving device runtime when they are used with Wi-Fi networks.

As far as the software is concerned, I would like to have HP avoid “reinventing the wheel” for Wi-Fi mice, keyboards and similar peripherals by making use of “class drivers” that have been defined for USB or Bluetooth human-interface devices.

There is one question that could be asked about this device as in whether it could work over the regular wireless network using the network’s router or access point and sending the data back to the host computer via that local area network, rather than the host PC’s wireless adaptor being virtualised as an access point. This may be of concern with people who run a desktop computer that doesn’t have integrated Wi-Fi but is connected to a the network via Ethernet or HomePlug and this network has a Wi-Fi segment serviced by a wireless router or access point.

A similar setup has been achieved with the myRemote Android app which converts an Android smartphone in to a mouse or remote control for a computer. This one uses the regular wireless network and requires knowledge of the host computer’s IP address and that computer has to run a monitor program downloaded from the myRemote developer’s Web site.

Links:

Android Market direct link

Click on or scan this barcode from your Android device to install this program.

Introduction

I am reviewing WiFi Analyzer which is an elementary wireless-network site-survey tool for the Android platform. This program is free-to-download but is ad-supported with ads that can be suppressed for a few weeks at a time through a user option. There is also the ability for users to donate via PayPal to keep the program being developed.

Like all other WiFi site-survey tools, this program relies on the “beacon” information sent out by wireless networks at regular information and a low-traffic wireless network may occasionally show up on the program’s radar whereas a regularly-used network will exist on the program’s radar.

Data views

This program has a few different methods of visualising the wireless-network space that your Android device as listed below.

There is a Channel graph which, like inSSIDer, can show the relative strength of each SSID on the Y axis and channel positioning on the X axis. This can be useful for determining whether a wireless network is being swamped out by other networks or determining where to tune the wireless access point’s operating channel to.

Wi-Fi Analyzer Channel Graph

There is also a time graph which shows relative signal strength of access points over a time period. This can be useful for determining what happens when a certain network comes on line for example.

There is also an access-point list which lists each access point that the Android phone can pick up. Here, you are provided with the ESSID, BSSID, channel number and security type (including WPS capability) of each access point and can have this sorted by ESSID, channel,signal strength or security type (“openness”). This list can be grouped by ESSID and security type so you can identify multi-access-point networks. This view may not be accurate if you have multiple wireless routers in an area set to default SSIDs like “linksys” or “dlink” but working on different WEP keys or WPA passphrases.

Wi-Fi Analyzer Network List by ESSID

There is a Channel-rating bar graph which measures channel useability by the number of stars where the more stars that exist, the better the channel is for your network. You can also “set” an access point to this graph so you can compare channels to the one it is tuned to at the moment. Again, this would come in handy for tuning the access point for best operation.

Lastly, there is a Signal strength meter which allows you to measure the signal strength of an access point. This can be useful for locating rogue or interfering access points or simply to determine the coverage of an access point.

Wi-Fi Analyzer signal strength meter

There is the ability for one to connect to a network if the user installs the “WiFi Connector Library” either through the application or by visiting the Android Market. This can allow the user to “lock-on” to a network while monitoring other wireless access points.

It works well as a basic handheld tool for setting up a new wireless router or access point or keeping a small wireless network operating at its best. For businesses who run public wireless hotspots, this program allows them to assess their hotspot’s performance or find rogue access points (fake hotspots / evil-twins).

Usage tests

I had put the program to some usage tests with different wireless networks including my own and a wireless hotspot, This hotspot was a complementary-use service run by a small independently-run cafe whom I have been helping out with concerning its performance and keeping it “business-safe”. Here, I used the signal-strength meter to check that there was proper signal coverage over the public dining room and terrace area of that cafe. I also used the channel-graph view to determine if there are other access points or ad-hoc wireless networks able to be picked up in the cafe. Both of these functions worked well with assessing the hotspot’s coverage and quality-of-service.

As well, I used it in two shopping strips to assess how it and the Samsung Galaxy S Android handset that I was running it on could handle many wireless networks. It is able to identify each SSID and plot it properly on the graph and could cope with me walking into and out of particular access-point coverage ranges.

Limitations and Points of Improvement

For this application, the program could support “whitelisting” of BSSIDs against an ESSID so that one can easily know if the access point that is using your ESSID is really your network. This would work well with managing public networks like wireless hotspots by identifying rogue access points like the aforementioned “fake hotspots”. It can also work well with managing multiple-access-point wireless networks.

A “Pro” version, which would be sold for at an extra cost and wouldn’t have in-app advertising, could provide various extra functions like SSID whitelist management for use in optimising or managing wireless-network activity in particular sites or GPS support for “plotting” network coverage maps or the ability to keep standard log files for use with desktop software.

It is worth noting that this program is restricted to the frequency bands that the smartphone or tablet can cover and this is typically the 2.4GHz platform. At the moment, there aren’t any Android devices that can cover the 5GHz spectrum using their own hardware.

Conclusion

At last this is a program that answers my need for a cost-effective easy-to-use handheld network-survey tool in a popular smartphone platform. It can therefore be a good companion program to the inSSIDer program that I had previously reviewed on this site.