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To: 49thMIMOMander who wrote (10218)3/30/2001 3:42:02 PM
From: S100  Respond to of 34857
 
Challenges Facing WAP Handset Designers
The challenges facing next-generation wireless handset designers can be grouped into two subsets. The easier of the two is GPRS itself. GPRS, by providing higher data throughputs than possible with older modem-circuit-switched approaches, makes data services, and Internet access in particular, a more marketable service for the service provider. The handset designer should make sure his or her silicon vendor not only supports GPRS, but also that the vendor has a plan to support competitive data rates and has a plan to develop the chipsets and power supplies to support always-on Web browsing applications.

The second set of challenges revolves around WAP itself. While virtually all the major handset vendors and network providers support WAP today, the service itself has met with only limited acceptance. Many of these limitations stem from the inherent difficulties of bringing rich Internet resources to the wireless handset. Users expectations have been set from years of surfing the Net with wired machines that feature large displays, full keyboards, and well-understood pointing devices.

For the handset designer, the WAP phone user interface, which is a key factor in determining the device’s usability, is a major challenge. Some of the tradeoff challenges are obvious. Users prefer large screens with high resolution to make Web surfing easier and faster (no scrolling). But large screens with high resolution consume more power, significantly decreasing standby and operating times and stressing limited battery life. And larger screens lead naturally to larger device sizes, while the market has clearly shown that consumers value small size and portability highly. The trick is to squeeze a large display using minimum power into a pocket-sized device!

Some of the challenges presented by WAP exist because most users are not yet familiar with the unique advantages and disadvantages of wireless access. For users accustomed to a PC-based Internet access experience, where 800 x 600 resolution might represent the bottom end of the spectrum, a WAP mobile phone can be a rude culture shock. A 128 x 128 pixel display is state-of-the-art for a handset, and the limit of about 20 characters by 10-12 lines means that users have to reset their expectations. In addition, WAP site designers and content providers need to implement a whole new approach to Web pages and information delivery. On a wired device with a large display, a Web page with 6-12 links is a logical presentation, and the user can select one and drill down several layers to find what he/she is looking for. But on a wireless device, such an information display would be impractical. Information must be presented with limited or no graphical support, and it must be presented in a sequence that reduces the number of “clicks” required by the user.

Another issue is that of navigation tools (thumbwheels, joysticks, etc.) and data input devices. Entering e-mail messages or universal resource locators (URLs) can be frustrating when the interface is limited to an ordinary telephone dial pad. But once again, designing a device with a more capable physical user interface generally means compromising on size.

Service providers must also work with content providers to put together offerings that make sense in the WAP world. Users are likely to find the upcoming push technology more compelling – signing up for specific news feeds, etc., that are automatically downloaded to the WAP phone – rather than using the traditional “pull” approach of a browser in which the user enters a URL to download a particular piece of information. This new paradigm will put more control (and revenues) in the hands of the network operators who will control the WAP portal to which users connect to subscribe to WAP-resources.

The final challenge facing network and content providers alike, as well as the designers of the infrastructure and handset equipment, is that the wireless Internet environment itself is not static. GPRS and WAP are evolving as the migration from 2G to 2½G to 3G is taking place.

Designer Strategies
Designing GPRS-enabled handsets is a challenging undertaking. It is easy to have components from one vendor work poorly with components from another vendor, even when there is nothing wrong with either component by itself. For example, the code for the GPRS protocol stack should be tight enough to fit into the available system memory while still leaving room for an enhanced user-friendly man machine interface (MMI). Users will not accept a compromise in usability of next-generation handsets, even if the functionality of the handsets is extended by GPRS. As a result, equipment manufacturers who require the GPRS software, the MMI, the voice coder, and the processing silicon from different vendors face the additional task of ensuring that the independent pieces fit together, even though each piece by itself can be verified for performance.

GPRS demands more processing power to deal with the additional protocol overhead and multi-slot data reception. The baseband load is about twice that of an enhanced full rate handset, and the RF section and power amplifier need higher performance as well. But cost considerations for consumer handsets eliminate the possibility of adding a separate processor for just GPRS. Hence, both the RF components and the baseband processors in the basic handset design should be capable of handling the added load of GPRS.

wirelessdesignonline.com{AF4D6680-2204-11D5-A770-00D0B7694F32}



To: 49thMIMOMander who wrote (10218)3/30/2001 3:44:13 PM
From: Ruffian  Read Replies (1) | Respond to of 34857
 
News Analysis: US wireless carriers send 3G into a spin

Theresa Foley

02 April 2001

The largest equipment contract to date for a third generation mobile network, a
$5-billion award from Verizon Wireless to Lucent Technologies for CDMA2000
technology, will put high-speed data services into the hands of one of the largest
CDMA operators in the world by year end.

The 3G landscape in the United States almost assuredly will be divided between two
standards for mobile data: wideband CDMA technology championed by European
and Asian suppliers, and CDMA2000 licensed from Qualcomm Inc.

of San Diego. Lining up with CDMA2000 networks will be Sprint and Verizon, while
Voicestream, Cingular and AT&T Wireless are likely to have the W-CDMA systems
more compatible with Europe's global system for mobile (GSM) standard.

Analysts say the Americas will follow what the U.S. does in 3G, meaning that all of
North and South America will operate with two standards.

That does not mean users will have to roam between data networks nationally,
because most wireless operators in the United States have national footprints.

Eventually, they say, software and equipment suppliers will make even the different
flavors of U.S. 3G work together.

But other analysts say the outcome is not the one which the world's standards
makers had planned. "The (International Telecommunication Union) agreed to one
global standard, but when it comes down to it, it's against the American way," said
Brownlee Thomas, research director at Giga Information Group, of Cambridge,
Massachussetts.

Perry LaForge, executive director of the CDMA Development Group, a consortium of
CDMA manufacturers and service providers in Costa Mesa, California, said the
Verizon contract means that 3G services will be available in the U.S. ahead of some
other parts of the world.

"This will influence South America and China," said LaForge. "The demise of TDMA
is occurring faster this year than before. People are looking to get off TDMA
networks," he said.

Phil Marshall, senior analyst with the Yankee Group Inc., of Boston,
Massachussetts, said that while Europe will have GSM and a single 3G technology -
the Universal Mobile Telecommunications System (UMTS) - both North America and
Asia will have multiple 3G standards. International users visiting the U.S. may need a
dual-band handset, and even a tri-band set if travelling in all three regions.

But some analysts said the mixture of two network standards in the U.S. is not an
issue for domestic users.

"Global roaming would be nice, but it's not the most important thing to the carriers,"
said Peter Friedland, wireless securities analyst at WR Hambrecht & Quist in San
Francisco.

But European telecoms industry representatives at last month's exhibition of the
Cellular Telecommunications and Internet Association, of Washington, D.C., said the
U.S deployment of CDMA2000 raises doubts that European 3G customers will be
able to roam in the U.S. with their phones.

Steve Fleischer, Sonera Corp. U.S. vice president for investor relations, based in
Bridgewater, New Jersey, said international usage would depend on whether
handsets are available that allow roaming between 2G and 3G networks. Sonera
owns five GSM networks in Europe.

According to Jane Zweig, chief executive of wireless industry consultancy Shosteck
Associates, of Wheaton, Maryland, the number of W-CDMA users will be greater,
but CDMA-2000 networks will still be large enough to have economies of scale.

And Hambrecht & Quist's Friedland said multi-mode chipsets should eventually allow
roaming between W-CDMA and CDMA 2000 networks.

"In a couple of years, it will be possible to roam across networks and frequencies,"
added Zweig.

Verizon already has installed CDMA2000 equipment in two markets, Las Vegas and
San Diego, although it is not in commercial use because no user equipment is
available. The newly contracted equipment will begin deploying services by year end.

Sprint PCS said it will spend $700-$800 million with four vendors, including Lucent,
on the first phase of its CDMA2000 3G network - it spent about $3.4 billion in
auctions for spectrum. The company said it will offer services late in the year.

But in financial terms, Verizon's commitment appears to dwarf the other U.S.
operators.

"This puts CDMA back in the spotlight," said Brian Bolliger, Lucent's director,
wireless networks group. In the U.S., "CDMA 2000 will be the dominant 3G standard
for several years," he said.

But he noted that U.S. carriers often don't seem overly interested in providing global
roaming, perhaps because "90% of the U.S. population doesn't have a passport."

"The problem I have with international roaming is that it's not global roaming, it's
global robbery," said Bolliger, referring to the $1.90 per-minute rate that U.S. users
pay to roam to a cell phone on a non-U.S. network.

The CDMA2000 operators will have an advantage, according to Yankee's Marshall, at
least in the U.S., because that standard can be implemented over the existing
network on already allocated spectrum, whereas W-CDMA needs new spectrum.

Aggressive moves into 3G
As well as giving an enormous boost to the Lucent workforce, the contract win
signals an aggressive posture toward 3G on the part of Verizon, which has spent $9
billion in spectrum auctions in the U.S. But even if 3G flops, Verizon's investment is
low risk because the upgraded CDMA2000 network - which uses technology known
as 1XRTT that can handle a data rate of 144 kilobits per second - can be used to
increase voice capacity and will make Verizon more cost-effective even if no demand
for data services materializes.

Yankee's Marshall said the 1XRTT technology that Verizon and Sprint will deploy is
superior to general packet radio service (GPRS) - the so-called 2.5G standard -
because it provides greater capacity with the same resources by more efficient
spectrum use.

The newly-emboldened CDMA Development Group plans this year to push harder
into China for CDMA deployments, accelerating its adoption in South America and
"educating Europe that there might be another approach," said LaForge.

"EDGE doesn't look like it will happen, and GPRS is not going to give the promised
data rates," said LaForge. A year ago, he would have said Europe was closed to
CDMA, he said, but now he is talking to operators there.Contact the CWI editorial team at:
editorial@cwi.emap.com



To: 49thMIMOMander who wrote (10218)3/30/2001 4:54:07 PM
From: S100  Read Replies (1) | Respond to of 34857
 
<phones without a dedicated power button>
Just looked at a MOT Bag phone, it does have a power button.

Isle of Mann update.

Manx 3G project on time
by Mark Mayne on 30 March 2001 16:27:00 GMT

The Manx Telecom 3G network project is firmly on schedule, according to Mark Briers, Manx 3G project manager, rebutting speculation that the ambitious project is falling behind due to technical and integration difficulties.

Briers said: “We recently received the hardware from Japan, and this should be up and running for testing purposes within weeks. It’s been pretty hectic to get to this stage, and there’s integration left to do, but we can now start thinking more about the applications rather than the hardware.”

The project is intended to be operational by early May this year, a deadline that Briers said was still attainable: “The first 3G NEC videophone is going to be on the island on April 9, and we should have the network running to support it by then.”

Manx Telecom is wholly owned by BT, and claims that its 3G network will be the world’s first to be operational.
netimperative.com



To: 49thMIMOMander who wrote (10218)3/30/2001 6:26:51 PM
From: Quincy  Read Replies (1) | Respond to of 34857
 
Ilmarinen, I'm not sure what that sentence really means, first in terms of what?? first in worst or first in best or first in most or first in least or first in time,etc,etc??

I no longer accept your issue with CDMA cell sites "breathing" when all future upgrades for GSM will sport the same feature.

The rest of your post fails to show me WCDMA works. There is a significant difference in time needed to complete link setup between TDMA systems and CDMA. UMTS tries to feign cost-effectiveness by relegating several mobile stations to different time slots on the same mod/demod back at the base station.

A CDMA air interface has no business featuring time slots any more than a Corvette needs 40 trucks.

Nokia has been designing and manufacturing IS95 chips and handsets for more than 5 years. With all that experience, can anyone demonstrate a working asynchronous handoff structure?

What efforts were required before GSM systems could use all time slots in a channel?

"As well as the unfortunate decision to continue the AMPS system with the somewhat compatible DAMPS (US-TDMA) system, instead of breaking free of analog systems and building a new digital system."

Perhaps if Nokia and Ericsson would have sold AT&T and Cingular GSM equipment at a price which allowed them to start from scratch, they wouldn't have chosen DAMPS. Then we can all scream about GSM capacity problems on both sides of the hemisphere.

The US could have followed Japan's lead on HDTV and used their MUSE system. We chose our own path. While it took us 8 years to get it to market, we learned in the meantime that the market has not yet developed to justify any investment. It accounts for 3% market penetration today.

It appears we failed to rush right out and replace all our IS41-based equipment for European GSM equipment. In the end it all worked out. IS41 upgrades featuring Qualcomm technology don't share the same drawbacks of GSM upgrades and enjoy a significant time to market lead.

Our failure to use your world standard turned out to be a damn good idea after all.