DECT (Digital Enhanced Cordless Telecommunications) is a digital wireless telephone standard developed in 1988 by ETSI to provide secure, high-quality transmission for cordless phones. It uses TDMA to transmit radio signals between DECT phones and their base stations. DECT has applications for homes, businesses, and industry and provides mobility and seamless handover between multiple base stations. While originally developed for Europe, DECT is now used globally and competes with technologies like Bluetooth for short-range wireless applications. The future of DECT includes expanding its use in security systems, data transmission over the internet, and new country adoption.
Universal mobile telecommunication System (UMTS) is actually the third generation mobile, which uses WCDMA. The Dream was that 2G and 2.5G systems are incompatible around the world.
-Worldwide devices need to have multiple technologies inside of them, i.e. tri-band phones, dual-mode phones
To develop a single standard that would be accepted around the world.
-One device should be able to work anywhere.
Increased data rate.
- Maximum 2048Kbps
UMTS is developed by 3GPP (3 Generation Partnership Project) a joint venture of several organization
3G UMTS is a third-generation (3G): broadband, packet-based transmission of text, digitized voice, video, multimedia at data rates up to 2 Mbps
Also referred to as wideband code division multiple access(WCDMA)
Allows many more applications to be introduce to a worldwide
Also provide new services like alternative billing methods or calling plans.
The higher bandwidth also enables video conferencing or IPTV.
Once UMTS is fully available, computer and phone users can be constantly attached to the Internet wherever they travel and, as they roam, will have the same set of capabilities.
Universal mobile telecommunication System (UMTS) is actually the third generation mobile, which uses WCDMA. The Dream was that 2G and 2.5G systems are incompatible around the world.
-Worldwide devices need to have multiple technologies inside of them, i.e. tri-band phones, dual-mode phones
To develop a single standard that would be accepted around the world.
-One device should be able to work anywhere.
Increased data rate.
- Maximum 2048Kbps
UMTS is developed by 3GPP (3 Generation Partnership Project) a joint venture of several organization
3G UMTS is a third-generation (3G): broadband, packet-based transmission of text, digitized voice, video, multimedia at data rates up to 2 Mbps
Also referred to as wideband code division multiple access(WCDMA)
Allows many more applications to be introduce to a worldwide
Also provide new services like alternative billing methods or calling plans.
The higher bandwidth also enables video conferencing or IPTV.
Once UMTS is fully available, computer and phone users can be constantly attached to the Internet wherever they travel and, as they roam, will have the same set of capabilities.
GPRS Architecture and its components are covered extensively.
The slides give a little information about gprs and also gets into deeper explanation of its architecture.
These slides cover a topic on ISDN (Integrated Services Digital Network) in Data Communication. All the slides are explained in a very simple manner. It is useful for engineering students & also for the candidates who want to master data communication & computer networking.
GPRS Architecture and its components are covered extensively.
The slides give a little information about gprs and also gets into deeper explanation of its architecture.
These slides cover a topic on ISDN (Integrated Services Digital Network) in Data Communication. All the slides are explained in a very simple manner. It is useful for engineering students & also for the candidates who want to master data communication & computer networking.
This PowerPoint Presentation describes about Telecommunication systems that work in Mobile Computing Technology. According to this telecommunication systems, 4 types of systems are available here. These Telecommunication Systems play an important role in Mobile Computing Technology. These are the digital Telecommunication Systems in Mobile Computing Technology
NB-IoT WiKi
NB-IoT (Narrowband IoT) is a low-power technology designed for Internet of Things (IoT) applications and other low-data rate communication requirements.
It uses narrowband radio spectrum and advanced power management techniques to efficiently utilize the available spectrum and extend the battery life of IoT devices.
NB-IoT is based on LTE cellular wireless technology and has been standardized by the 3rd Generation Partnership Project (3GPP) as the global wireless communication standard for IoT applications.
This ppt define the basic concepts of mobile computing. It is the first part of mobile computing.
It defines the following terms
Introduction to mobile computing
Generations of mobile computing
Cellular concepts
Signalling, modulation and Demodulation
Spread Spectrum
Frequency Reuse
Multiple access schemes
GSM
GPRS
CDMA
4. Background and History What is DECT? Digital Enhanced Cordless Telecommunications DECT is a standard for digital wireless telephone technology DECT History developed January 1988 by the ETSI ETSI (European Telecommunications Standards Institute) developed DECT by combining CT2 and CT3
5. Background and History DECT was first known as Digital European Cordless Telecommunications DECT changed to its current name to reflect global acceptance The first DECT was the Siemens Gigaset 900 telephone in 1992 First ETSI standards of DECT were ETS 300 175 and 300 176
7. Functionality How Does DECT Function? It is high speed quality, low power technology Low risk of radio interference Uses time division multiple access (TDMA) to transmit the radio signals to DECT phones DECT phones work from a base station with a handset
8. Functionality 5 Major Applications of DECT 1) Cordless Private Branch Exchange (PBX) 2) Wireless Local Loop (WLL) 3) Cordless Terminal Mobility 4) Home Cordless Phones 5) GSM/ DECT internetworking
10. Usage in Society Used for residential and business purposes DECT is used in many countries such as the U.S., Italy, and the U.K. In 2002 Bluetooth was created Bluetooth uses short range wireless data applications
12. Usage in Society Home Solutions Residential areas are the largest application area
13. Usage in Society Fax, PC, telephones, as well as PC and telephone wireless devices are connected by a fixed access unit PTSN- Public Switched Telephone Network PSTN access allows 6-10 handsets t be used externally and for intercom access
14. Usage in Society Office Solutions DECT capacity is high and supports more than 10.000 Erlang per floor square kilometer
15. Usage in Society Office Solutions Main application area for DECT is seamless handover No separate base station controller DECT is cost efficient
16. Usage in Society Enterprise Solutions Typical data services are paging, group calls, automatic alarms, and many others DECT provides laptop PC wireless access to LAN Provides cordless solutions for System Integrators
17. Usage in Society Public Solutions DECT provides high capacity WLL services
18. Usage in Society Public Solutions WLL supports voice telephony, ISDN, and internet user data This provides user access data up to a few hundred of kbps (kilobit per second)
19. Usage in Society Industrial Solutions DECT applications provide supervision and control needs in a variety of ways Authenticating- base station and handset handshake using specific rules and calculations Encryption- the digital data is encrypted and then is decrypted when it is received by the intended receiver
21. Future Outlook The digital cordless telephone market is moving to new countries Use of DECT modules in security systems are replacing wired systems in buildings DECT security system applications will be used for homes DECT use for data/ multimedia on the web
23. References DECT Forum http://www.dect.org/content.aspx?id=18 Digital Enhanced Cordless Communications http://en.wikipedia.org/wiki/Digital_Enhanced_Cordless_Telecommunications
24. References What is DECT? http://www.dectweb.com/Introductions/answers.htm What is a DECT phone? http://wisegeek.com/what-is-a-dect-phone.htm
