How to build more powerful mobile web

Interesting presentation from Google here.

ZigBee and Short Range Wireless Overview

Couple of interesting presentations are available on the Cambridge Wireless website for Short range Wireless technologies and ZigBee.

The First one, "ZigBee® Applications in sub-1GHz Frequency Range" is available here.

The Second one, "SHORT RANGE WIRELESS OVERVIEW" is available here.

The above is an interesting chart from the second presentation showing the comparison of different short range wireless technologies.

MBMS and AMR-WB

Nokia publicly underlined its commitment to broadcast-mobile-TV standard DVB-H with the recent unveiling of the mobile TV edition of the Nokia 5330 and its pretax, presubsidy price tag of €155 (US$230), after some in the industry had questioned its enthusiasm for launching new DVB-H devices. Nokia also quelled any suggestions that it might start supporting the MBMS standard with its future device launches.

The price is a massive drop from the €550 price tag carried by Nokia’s last fully DVB-H-compatible handset, the N96, which launched in 3Q08. So the official line from Nokia is this: “All is well on the good ship DVB-H.”

Read more here.

Meanwhile, In China, China Unicom has launched 3G telecom services in 268 cities across the country, said Li Gang, another deputy general manger for Unicom Group, noting that the WCDMA network supports a 14Mbps download data transmission speed and a 7.2Mbps upload data transmission speed.

Notably, the carrier has adopted the most advanced R6 technology in its core WCDMA network to smooth a WCDMA-to-EPS migration in the future, according to Mr. Zhang.

The China Unicom network is expected to support MBMS and HSPA+64QAM technology in the first phase of a further evolution, shore up a HSPA+MIMO technology in the Phase II evolution, and prompt a LTE technology in the Phase III evolution, said Mr. Zhang, adding that the network will present a 100Mbps download speed and a 50Mbps upload speed after the Phase III evolution.

Read more here.
Back in September, Orange Moldova announced the launch of the world's first mobile telephone service offering high-definition (HD) sound. The service will provide customers with a significantly improved quality of service when making calls. Unlike for other mobile technologies such as multimedia capabilities, this is the first time since the 1990s that mobile voice technologies have been subject to a significant evolution.

This is the second step in Orange’s HD voice strategy, following on from the launch of a high-definition voice service for VoIP calls in 2006. Over 500,000 Livephone devices have already been sold in France and the range will be extended to other Orange countries over the coming months.

The first mobile handset integrating high-definition voice capability that will be launched by Orange Moldova is the Nokia 6720c. This innovative handset integrates the new WB-AMR technology, which is widely expected within the industry to become a new standard for mobile voice communications.

Thanks to the Adaptive Multi Rate-WideBand (AMR-WB) codec, double the frequency spectrum will be given over to voice telephony over traditional voice calling. Orange boasts that the result is "near hi-fi quality" and "FM-radio quality", which seems an odd comparison.

Upto 25 million mobiles in trouble in India

I blogged about the Shanzhai phones earlier and mentioned that since they dont have an IMEI, they can cause problems for the security officials and India was considering banning them.

Now, this has finally happened. Mobile phones without the code were blocked at midnight - operators were asked to bar calls to them "in the wake of increased threat perception from militants".

The absence of this number makes it impossible to trace either the caller or the phone or to access call details.

Indian intelligence agencies say phones without the code have been used in attacks by militant groups.

The International Mobile Equipment Identity (IMEI) number is a 15-digit code which appears on the operator's network whenever a call is made.

It is estimated that India has more than 25 million phones without codes. Phones with no codes or invalid numbers are mostly cheap, unbranded phones. Millions are manufactured in India or imported, mostly from China.

If you're one amongst the estimated 25 million users with such phones and wish to have the phone in working condition again, (in case yours went offline as well) there is a legal way of doing it. The government has authorized some organizations to legalize your illegal handsets by assigning an approved IMEI number to it. The GII (Genuine IMEI Implant) program involves a short trip to the nearest GII outlet, paying a nominal Rs. 199 fee to have your phone legalized.

In major cities, you can visit The MobileStore outlets to get this done. You might also want to contact your operator if they have arranged for any such facilities. For those interested in The MobileStore program, all you need to do is to call 6000 63 63 to figure out the nearest outlet where your Chinese phone can get a new lease of life

The MobileStore claims to have successfully done over 30,000 IMEI implants in over 60 cities.

Femtocells to grow from 0.2 million units in 2009 to 12 million units in 2014

From Qualcomm's QMag:

Femtocell shipments will grow from 0.2 million units in 2009 at a compound annual growth rate (CAGR) of 127 percent to 12 million units worldwide in 2014, according to analyst firm Berg Insight.

In the U.S., 14.8 billion video clips are viewed online every month with an average user viewing time of 356 minutes and a consumption of 680Mbps (ComScore); in the UK, the average monthly consumption per user is 1.3Gbps(ComScore). This online trend is now migrating onto mobile. According to AT&T, data represented 27 percent of revenues in 1Q09 compared to 21 percent in the same period the previous year, with streaming audio and video accounting for 31 percent of network traffic.

In developed markets(Coda Research Consultancy), much of this mobile data explosion is generated by smartphone users, where the average year-on-year growth of mobile data per user is between three and five times.

“We need to drive down the cost per bit in operator networks while also meeting the rocketing demand for mobile broadband services, which is putting too much pressure on HSPA and HSPA+ networks,” said Simon Saunders, chairman of the Femto Forum. “We need a change and that is where femtocells have a major role to play.”

It is a change driven by the operators’ need to meet growing user consumption. Saunders told QMag that 90 percent of mobile data usage is indoors. “Because the data user experience is directly correlated to the quality of that signal, it makes sense to place femtos indoors where signals are weakest and therefore the user experience is poorest,” he said.

Questions are now being raised by mobile operators about whether macro networks will scale to meet the rapid upsurge in mobile data demand. In addition, coverage holes caused by building shadows and building penetration losses are limiting the performance of wireless networks indoors.

“Femtocells bring the network supply closer to the demand for services, and in the process, provide excellent signal conditions and high data throughput,” said Nick Karter, senior director of business development at Qualcomm.

Karter said operators confronted with capacity concerns will require substantial capital expenditures to improve macro network performance to support its heaviest users. However, operators can target their CAPEX in both the enterprise and residential environments by providing their heaviest users with femtocells. This will ease network congestion on the macro network and reduce backhaul capacity needs. In the process, femtocells can deliver indoor throughputs and peak rates well in excess of 1Mbps.

Similarly, Saunders is confident that the return on investment from femtocells will be considerably higher than a macro network upgrade path.

“Operators are starting to realize that the investment required to provide free femtocells to heavy data users is far lower than trying to achieve the same outcome with macro network upgrades,” he said. “Femtos deliver better voice quality and a vastly improved data experience at a cost no other technology can match.”

He claimed that 20 percent of homes in the UK have inadequate coverage for voice and data. In July, Vodafone UK became the latest operator to deal with the existing issue of mobile coverage at home using femtocells when it launched its Vodafone Access Gateway – targeting homes and small office locations. The UK operator positioned the service as delivering “more reliable 3G coverage indoors” and providing improved voice calls and faster data downloads.

Vodafone UK was the first European operator to launch a femto service, following similar announcements from Sprint and Verizon Wireless in the U.S., NTT DoCoMo and Softbank in Japan, and StarHub in Singapore. “These operators are the pioneers, and we will see more femto launches before the end of the year from other big operators,” said Saunders.

The Vodafone Gateway is available on a monthly tariff of £5 or a one-off cost of £160, while Verizon charges US$250 Femtocell shipments will grow from 0.2 million units in 2009 at a compound annual growth rate (CAGR) of 127 percent to 12 million units worldwide in 2014, according to analyst firm Berg Insight. (£157) for its Wireless Network Extender device. But as both Karter and Saunders explained, the costs are expected to be incorporated by operators as femto becomes a central component in the fight against churn. “Femtocells are creating a very sticky service for the consumer by providing operators with the ability to create differentiated offerings,” Saunders said.

Not only does femto have the additional attraction of being able to work with all 4 billion mobile devices operating around the world, it can deliver location-, context-, presence-, and user-based information.

Femto could deliver premium, bigger apps to the device when the user returns home and the device switches from the macro network to the femtocell. “When users are out and about they can use basic multimedia services,” Saunders explained. “However, when they arrive home they can use the femto to access far higher bandwidth services and synchronize their handset quickly and at zero cost with all of the media stored on their home network.”

As Saunders notes, femto is still in its evolutionary phase and requires key players such as Qualcomm to build on the standardized products in large volumes by delivering the silicon to femto-friendly vendors.

“We all need to draw on a common base of components,” Saunders said. “So we’ve been looking at femtocell devices and network gateways and started to harmonize design based on standards. This will allow consumers and operators to choose from a wider range of products as well as bring costs down through economies of scale. If it’s cheaper overall to deliver and it provides a better service, then everyone wins.”

Experiences and Lessons from Early Femtocell Deployment

From IEEE Communications Magazine, September 2009:

There is a continuous pursuit by mobile operators (MOs) to improve indoor coverage in order not only to improve voice quality but also to enable higher data rates in home/office environments. Indoor coverage improvement, in conjunction with inexpensive (voice) offerings, will enable MOs to compete with and take away voice-call-related revenues from fixed network PTTs and/or VoIP operators. Femtocells constitute a promising solution to address all of the above. In this article we present our experience from our extensive study and trials of early (pre-standard) femtocell solutions that were available in the 2007-2008 timeframe.

Our as well as other operators’ involvement and experience with pre-standard femtocell solutions has revealed some of their early drawbacks that restrained them from massive-scale commercial launches. However, the accumulated experience from all these trials as well as the recent standardization activities in 3GPP/3GPP2 will lead to a new generation of standardized femtocell solutions and raise the expectation for commercial market success for

operators and vendors alike. It is envisaged that initially, femtocells will be utilized for coordinated coverage extension purposes (e.g., public areas) and niche markets (high-value customers, enterprise packages), rather than mass market commercial offerings. Upon the advent of standardized 3G-femto solutions, the increase of competition at FAP level (models, volume availability, cost reduction) will contribute to the extensive commercialization of femtocells, which will be further boosted by the introduction of LTE home Node-Bs.

The complete paper is available here in pdf format.

Presentation on LTE

LTE - Long Term Evolution

View more presentations from Arief Gunawan.

SuperFemtos, 'greater femtocells' and 'wide area femtocells'

Picture Source: Metro Femto by 3G in the home

I think some companies may now be willing to go to any lengths to market their products. I did report some initial Femtocell Jargon but I stopped keeping track untill recently where I bumped into three of them in the same day.

Ubiquisys, the leading developer of 3G femtocells, announced commercial availability of its wide area femtocell solution, providing a coverage area of up to 12km2 (5 sq. miles) at a fraction of the cost of existing solutions. The new femtocell is ideal for rural areas with poor coverage, such as isolated villages, hamlets or farms. The company recently shared the results of a live demonstration of the solution in the field, at the Femtocell Americas event in San Diego.

The Wide Area Femtocells have a capacity of up to 16 calls and can either be mounted outdoors, or placed indoors with an external antenna, typically attached to the roof of the building. They can be deployed very quickly, because they continuously adapt their radio configuration according to the operator’s policies, working in harmony with the regular mobile network and eliminating the need for a radio planning project.

The solution can be combined with Ubiquisys Grid System technology to cover still larger areas with multiple femtocells, which form a self-organising mesh of coverage and capacity.

Ubiquisys has performed a field demonstration of its wide area femtocells in a rural area near Swindon in the UK. The demonstration showed that for less energy than it takes to power a light bulb, a village area with a 1.5km radius was provided with comprehensive coverage.

The wide area femtocell solution is commercially available today and is being actively deployed.

A Class 3 femtocell reference design, the PC8219E from picoChip claims a world first that brings femtocell technology to campuses, rural areas or 'metrozone' hot-spots. The turnkey solution builds on the company's field-proven robust PC8208 and 8209 PHYs to provide a complete extended-reach HSPA femtocell baseband. The device has already been delivered to customers and deployed by carriers.

The PC8219E's eight user capacity, 2 km range and support for vehicular mobility make it well-suited for low-cost, wide-area open access femtocell deployments in areas where carriers need to cost-effectively enhance coverage and capacity. Although femtocells are often thought of for residential applications, there is a growing recognition that the advantages they deliver, in terms of capital and operating expenditure, can be more broadly applicable.

The PC8219E is a programmable, flexible, easily integrated product that caters for multiple users, has self configuration features and backhauls via the internet. Featuring industry-standard FAPI and FRMI interfaces, as defined by the Femto Forum, the reference design also has fully-compliant security functions. The design includes a network monitoring function that allows the femtocell to reconfigure itself to behave like a handset receive chain, synchronizing with a macro-base station nearby, improving network planning and providing the basis for Self Organizing Network (SON) functions.

This new variety of mobile cells has been termed 'greater femtocells' or 'superfemtos'. Such products are similar to the 3GPP 'Local Area Basestation' or traditional picocells, but add the femtocell's capabilities to use standard backhaul and to self-configure for interference management. The Femto Forum has recently standardized femtocells into Class 1 (typically residential), Class 2 (primarily indoor for enterprise) and Class 3 (for rural, metro and wider area deployment).

Wireless Phone chargers coming in time for Christmas

We have talked about WiTricity and Nokia's self-recharging phones but they seem to be a bit far away.

From The Independent:

PowerPad, made by the British gadget firm, Gear4, goes on sale next month and is among a new wave of devices sweeping us towards this unplugged utopia. A protective sleeve slips over an iPhone, slotting into its connecter socket. When the encased phone is placed on a mains-connected pad on, say, a desk or bedside table, electricity makes the jump. American outfits PowerMat and WildCharge make similar devices. Meanwhile, the Palm Pre smartphone has its own "Touchstone" charger and Dell's Latitude Z is the first wireless laptop.

"Wireless electricity is something we used to talk about years ago almost as a bit of a joke when we made predictions about the future," says Michael Brook, editor of the gadget magazine, T3. "To a lot of people it sounds insane that you could even do it – like some kind of witchcraft – but we're seeing a lot of interest in the first wireless chargers. It's going to take off in a big way." If not witchcraft, how does it work? Here's the science: Current from the mains is wired into a transmitter coil in the charging mat. This generates an electromagnetic field. A receiver coil in the phone's case takes the power from the magnetic field and converts it back into electricity that charges the device. By separating those coils, induction charging takes the 150-year-old principle used in the transformers found in most electric devices and splits it in half. No more tripping over laptop leads and their power bricks or diving under your desk to plug in your charger – just put your gadget on the mat and induction takes care of the rest.

But wireless induction, which, in a less-sophisticated form has charged electric toothbrush chargers and some medical implants for years, isn't perfect. Advances mean it's now viable for more demanding devices, but in the case of the PowerPad, it requires a case that adds bulk to what is already a hefty handset. Another drawback is the lack of compatibility – a phone with a PowerPad case will not charge on a PowerMat.

A growing group of electronics firms want to sdeal with the problem. The Wireless Power Consortium (WPC) includes Gear4 and the mobile phone giants, Nokia, Samsung and RIM, makers of the Blackberry. "These companies think there won't be a mass market for wireless charging unless there is a standard," says Menno Treffers, chairman of the consortium's steering group and a director at Philips.

Learning their lesson from the hopeless incompatibility of wired chargers, supporters of WPC's Qi ("chi") standard will put universal coils in devices that will work without cumbersome cases. They'll also be compatible with any charging mat, whether it's on your desk or recessed in a table at Starbucks. Treffers expects the first Qi-compatible devices to hit shelves next year.

But there remains a major flaw in charging mats – their need for proximity. Separation of even a millimetre renders most mats useless. Take your laptop to your bedroom to watch a DVD and you'll need a second mat or a cable. For a truly wireless scenario, electricity must make a giant leap.

Marin Soljacic is a Croatia-born physics professor at Massachusetts Institute of Technology (MIT). In 2002, he got annoyed when his wife's mobile phone woke him up with beeping when its battery ran low. "Not only did I have to wake up to plug it in but had to find the charger in the dark," he says. "I thought, power is everywhere – sockets all over the house – yet it isn't close enough." Soljacic was sure there must be a way to bridge the gap. He wanted his wife's phone to charge while it was still in her handbag. Two years ago, after months of equation crunching and computer modelling, Soljacic literally had a light bulb moment when he flicked the switch of a 60-watt lamp. No big deal except that the electricity powering the light was travelling two metres through thin air.

Soljacic and his team at MIT have since formed a company called WiTricity. Last July, its chief executive, Eric Giler, came to Oxford to demonstrate a wireless television. In front of an amazed audience at a technology conference, he powered up a giant plasma screen TV that had no cables. Electricity sprung from a sleek unit on the floor to a receiver mounted on the back of the screen. Last month, Giler travelled to Japan to show off a wirelessly-charged electric car. "Every time I show people they're blown away," Giler says. "When you see it up close it does appear almost magical."

Soljacic's magic takes the split-transformer model that powers charging mats and adds a key ingredient to make electricity fly. It's called resonance, the phenomenon that means a singer who matches the acoustic frequency of a wine glass can shatter it. Soljacic knew that two resonant objects of the same resonant frequency tend to exchange energy efficiently – imagine a tuning fork causing a nearby fork with the same frequency to chime sympathetically. His breakthrough was to work out a way to use resonance in magnetic form to transfer not sound but electricity. He explains: "By coupling the magnetic field that surrounds a resonant coil to another coil resonating at the same frequency, we can make the electricity hop from one to the other."

WiTricity's strongly coupled magnetic resonance means cars, TVs, free-standing lamps, and computers – anything that requires electricity – can be powered or charged from a central source in the ceiling or under the floor. And it's all totally safe. "The fields that we are generating in are about the same as the earth's magnetic field," Giler says. "We live in a magnetic field."

Giler and his team are in talks with big-name electronics manufacturers, including many of those who are putting their names to the Qi standard for charging mats. Giler says proximity charging is "first-generation stuff; by the end of next year you'll start seeing devices with WiTricity components built in". If he is right, homes and offices could soon be fully wireless. "It's a fundamental breakthrough in science and a game changer for the industry," he says. "Cut the cords and the world's going to change."

Interesting Video:

WiMAX Femtocell System Architecture

So what does it take to build a WiMAX Femtocell solution?

WiMAX Femtocell can be visualized as a scaled down version of WiMAX macro-cell solution. In addition to the capabilities of a WiMAX macro-cell, other required features of a WiMAX Femtocell are the following:

• Spectrum: WFAP operates over licensed spectrum using standard WiMAX wireless air interface and protocol.

• Form factor: WFAP can be standalone (similar to WiFi access points) or integrated with DSL or cable modems.

• Transport: WFAP uses transport network of subscribers’ DSL, FTTH or cable-based broadband connection.

• User Capacity: Since WFAP is deployed inside a building; a WFAP needs to support at least 5-6 subscribers.

• Power Output: With a range of roughly 10 meters, power output should be kept very low, no more than a 2.4 GHz WiFi product.

• Deployment Support: Operating in a licensed spectrum a WFAP may face interference from neighboring base stations (femto or macro). Therefore, a WFAP should have the capabilities to automatically adjust to minimize the interference.

• Local Breakout: A WFAP should optionally support the capability to route incoming or outgoing traffic directly to the destination through the Internet Service Provider (ISP) network. This approach will bypass the WiMAX service provider network, thus offloading WiMAX service provider network and reducing the cost of service to the subscriber.

• Performance: A Femtocell solution should fit as per the WiMAX network architecture defined by the WiMAX forum. The deployment should not limit the number of WFAPs that are able to connect with a designated ASN Gateway unless operator specified. A network deployment should allow different ISPs to connect WFAP with ASN Gateway in the core network.

• Hand-over: A Femtocell solution should allow handovers between WFAP and WiMAX macro cells or with other adjacent WFAPs.

• Security: A Femtocell solution should use a secure channel of communication (for both control plane and data plane) with ASN Gateways in the core network. The core network must authenticate and authorize a WFAP before it starts offering services to MS/SS in its coverage area. A WFAP may authenticate the ASN Gateway with which it gets connected. A WFAP should keep its air interface disabled unless it is authenticated and authorized to start communication with the ASN Gateway in the core network. A Femtocell may support close subscriber group (CSG) database i.e. a list of subscribers allowed to access the WFAP, and its management.

• Accounting: For providing different rate plans to subscribers accessing services through WFAP, a WFAP needs to make sure that it is recognized by the core network.

• Location Information: A WFAP should support location identification procedures with the core network. Location information can then be used for emergency services or location based services.

• Air Interface: A WFAP should provide at least 10 meters of coverage area in a residential set up without any exclusion zone around it.

• Network Synchronization: A WFAP should support mechanism to synchronize with external network to provide services that require strict air interface co-ordination. Some of the services are soft-handovers, support for idle mode paging, and multicast-broadcast (MCBCS) services.

• Quality of Service: A WFAP should support marking of incoming/outgoing packets with appropriate DSCP code, as configured by a service provider. This would allow support for defined service level agreements (SLAs) when the service is delivered through a WFAP.

• Manageability: A WFAP should implement DSL forum’s defined TR069 protocol to allow an operator to remotely manage a WAFP. It must allow an operator to remotely disable/enable the air interface service.

The WiMAX network architecture for femtocell systems is based on the WiMAX basic network reference model that differentiates the functional and business domains of NAPs from those of the network service providers (NSPs). The NAP is a business entity that provides and manages WiMAX radio access infrastructure, while the NSP is the business entity that manages user subscriptions, and provides IP connectivity and WiMAX services to subscribers according to negotiated service level agreements (SLAs) with one or more NAPs. A NAP is deployed as one or more access service networks (ASNs), which are composed of ASN gateways and BSs, while the NSP includes a home agent, authentication, authorization, and accounting (AAA), and other relevant servers and databases.

In a WiMAX network supporting a femtocell, a new business entity called the femto-NSP is introduced, which is responsible for the operation, authentication, and management of WFAPs. The femto-NSP is logically separated from the conventional WiMAX NSPs responsible for MSs’ subscriptions, and it includes femto-AAA and femtocell management/self-organizing network (SON) subsystems.

The femtocell management system is an entity to support operation and maintenance (O&M) features of the WFAP based on TR-069 or DOCSIS standards. Because potentially many femto BSs will be deployed in overlay coverage of macrocell BSs and have to support handover to/from macrocell BSs or neighbor femto BSs, the operating parameters of femto BSs have to be well organized and optimized. Femto BS parameter configuration and network performance, coverage, and capacity optimization can be done in an autonomous fashion by using SON functions. A SON server provides SON functions to measure/analyze performance data, and to fine-tune network attributes in order to achieve optimal performance.

A femto-NAP implements its infrastructure using one or more femto-ASNs; an ASN is defined as a complete set of network functions needed to provide radio access to a WiMAX femtocell subscriber. The reference model for a the femto-ASN is defined based on some changes to the conventional ASN to address specific needs of WFAPs, which typically reside at customer premises, and are operated and managed remotely by a femtocell operator over third party IP broadband connection. The femto-ASN reference model includes a WFAP connected to a femto-GW serving as the ASN-GW, through a new entity called a security gateway (SeGW). The SeGW provides IP Security (IPsec) tunnels for WFAPs, and is responsible for authentication and authorization of the WFAPs. The WFAP is connected to a femto-ASN gateway (femto-ASN GW) and other functional entities in the network through this IPsec tunnel. The management system is connected to WFAP through Rm for remote configuration, and it will also include the SON server function, to be defined in the next releases of the femto architecture.

The femto-ASN GW is an entity that controls WFAPs, and performs bearer plane routing to the CSN and Internet as well as control plane functions similar to ASN-GW providing the link to the connectivity service network (CSN) and other ASNs with mobility and security support in the control plane and IP forwarding. In addition to common functionalities of the ASN-GW, the femto-ASN GW supports femto-specific functionalities such as closed subscriber group (CSG) subscriber admission control, femtocell handover control, WFAP low-duty mode management, and femtocell interference management.

Image Reference: WiMAX Femtocell: Requirements, Challenges, and Solutions