What is WAP?

What is WAP?

The Wireless Application Protocol (WAP) is an open, global specification that empowers mobile users with wireless devices to easily access and interact with information and services instantly.

WHAT IS WAP FOR?

What is the purpose of WAP?

To enable easy fast delivery of relevant information and services to mobile users.

What type of devices will use WAP?

Handheld digital wireless devices such as mobile phones, pagers, two-way radios, smartphones and communicators -- from low-end to high-end.

Which wireless networks does WAP work with?

WAP is designed to work with most wireless networks such as CDPD, CDMA, GSM, PDC, PHS, TDMA, FLEX, ReFLEX, iDEN, TETRA, DECT, DataTAC, Mobitex and GRPS.

What operating systems are compatible with WAP?

WAP is a communications protocol and application environment. It can be built on any operating system including PalmOS, EPOC, Windows CE, FLEXOS, OS/9, JavaOS etc. It provides service interoperability even between different device families.
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Labels: New Technologies
DECT
What is DECT?


DECT (Digital Enhanced Cordless Telecommunications) is a flexible digital radio access standard for cordless communications in residential, corporate and public environments
. DECT provides for voice and multimedia traffic, and contains many forward-looking technical features that allow DECT-based cordless systems to play a central role in important new communications developments such as Internet access and interworking with other fixed and wireless services such as ISDN and GSM.
The DECT standard makes use of several advanced digital radio techniques to achieve efficient use of the radio spectrum; it delivers high speech quality and security with low risk of radio interference and low power technology.

TDMA (Time Division Multiple Access) radio access, with its low radio interference characteristics, provides high system capacity to handle up to 100'000 users per km² floor space in an office environment.

ADPCM (Adaptive Differential Pulse Code Modulation) speech encoding ensures a DECT cordless phone very high speech quality, comparable to wireline telephony.

DCS/DCA (Dynamic Channel Selection / Allocation) is a unique DECT capability that guarantees the best radio channels available to be used. This happens when a cordless phone is in stand-by mode, and throughout a call. This capability ensures that DECT can coexist with other DECT applications and with other systems in the same frequency, with high-quality, robust and secure communications for end-users.

Other features of the DECT standard include encryption for maximum call security and optimized radio transmission for maximum battery life.
DECT basic technology and the various profiles enhance the DECT standard, introducing evolutionary applications and services. The GAP profile, for example, ensures interoperability of equipment from different providers for voice applications.

DECT Benefits

The DECT standard was designed from the start to support the real-world needs of telecommunications network operators, business organizations and consumers.

Low Cost
Through the utilization of the same basic technology for residential cordless phones (mass-market) up to complex multi-cell systems, DECT has an attractive and competitive cost position. DECT systems require no frequency planning during initial deployment or subsequent expansion. Once the radio infrastructure is in place, additional base stations and cordless terminals can easily and quickly be added.

High Capacity
The radio technology used in the DECT standard permits very high concentrations of users to be served - up to 100,000 users in any km² office area. This makes DECT a powerful solution for densely-occupied office buildings, public and residential areas.

Spectrum Efficiency
Through the advanced digital technology and unique capabilities like DCS/DCA, DECT very efficiently uses the available radio spectrum in the standard bands (1880-1900 MHz, 1900-1920 MHz, or 1910-1930 MHz). Various applications can share the spectrum, e.g. voice and data, or public and private applications.

Security
The combination of TDMA/TDD digital radio technology and dynamic channel selection with additional encryption techniques, authentication and identification procedures, makes DECT radio transmissions extremely secure against unauthorized radio eavesdropping by third parties. The implemented encryption method enhances the security of DECT to a very satisfactory level.

High Quality
Speech quality in a DECT system is very high, thanks to the digital radio techniques applied. ADPCM digital voice coding technology also ensures compatibility with ISDN. In a multi-cell system such as a cordless PBX, handover from cell to cell is fully transparent to the user.

Future-Safe
The DECT standard will form an integral part of the evolution towards UMTS. It belongs to the IMT 2000 family concept which ensures long-term protection of investment.


Applications

DECT is the only standard that supports a whole range of applications, from single-cell domestic cordless phones through multi-cell cordless PBX systems and Wireless Local Loop systems for fixed users. It is equally suited for data and voice services in all environments, be it for a single line with one cordless phone, or for a large-scale system with several thousand users on various sites.

DECT At Home
A single-cell DECT cordless phone gives users much better speech quality, functionality and security than could be obtained with previous generations of cordless phones. It also provides free-of-charge in-house communications between affiliated cordless handsets.

DECT In The Office
A multi-cell DECT cordless PBX system can form a seamless mobile communications environment serving just a few up to several thousand users on one or more sites. The DECT digital radio technology permits very high densities of users to be served, in a secure and robust way and to profit by both voice and data services with a single infrastructure.

DECT In The Wireless Local Loop (WLL)
DECT technology provides a rapidly available, low-cost, high-quality radio alternative to wired subscriber local loops, to bring public network voice and data services to subscribers. It enables quick network deployment, coverage to be built up as needed, and can be used as a replacement for the wireline, thereby reducing the initial capital investment for the operator.

DECT And Data
Data applications are becoming more and more important in all areas mentioned so far. Low data rate applications such as barcode readers can as well be served as advanced application like Internet access. Today, DECT products provide data links with up to 552 kbit/s. New modulation schemes will repidly allow the rate to grow up to 2 Mbit/s.

DECT And Migration To Integrated Services
The DECT standard has access and interworking profiles that permit the standard to be used in integrated communication solutions. DECT and GSM networks, for example, can combine with the complementary strengths of both standards, to give users full obility with integrated dual-mode handsets.