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corDECT Wireless Access System
 An Indian way to Wireless Revolution
Why corDECT ?
 Cost of setting up traditional copper based telephone networks very high
 Developing countries like India will require 35-million pair kilometers of copper cable to maintain existing waiting lists.
 The cost of Copper Increasing
 Wireless reduces the cost of Access part of network which consists of 70% of total costs
 Still cost of setting up Base stations and their controllers very high
 Eliminates the physical connections between telephone exchanges and subscribers
 Has a simple technology structure, easier to implement, supports large number of subscribers
 Costs less than traditional Wireless Structure used by Mobile Operators
The Torch Bearers
 Indian Institute of Technology, Madras,
 Midas Communication Technologies, Madras,
 US semiconductor manufacturer Analog Devices Inc.
The Technology
 Based on the Digital Enhanced Cordless Telecommunication (DECT) Standard
 Built around a micro cellular architecture
 corDECT micro cell could be as small as 250-meters.
The DECT Standard
 Defines the air interface for users.
 Specifies the interface between the subscriber terminal and the base stations.
 DECT/GSM,DECT/ISDN and DECT/PSTN inter networking profiles
 The DECT Standard
 The DECT frequency band is 1880-1900MHz.
 The standard uses 32kbps ADPCM (Adaptive Differential Pulse Code Modulation)
 Channel structure corDECT
Architecture And Components
 DECT Interface Unit (DIU),
 compact base stations (CBS),
 subscriber access units
DECT Interface Unit
 Compact Base Station
 The Subscriber Unit
 Subscriber Unit for looks for access to strongest base channel
 Locks to the quietest of the available 12 channels
 Ensures Interference free Communication
 Encryption Protects from Eaves Dropping
The Subscriber Unit
 The handset is a small, portable battery operated unit that allows subscribers limited mobility at pedestrian speed. Can be operated upto 200m from CBS
 The subscriber can have access to any CBS connected to one DIU.
 A wallset can be used three-kilometers from a CBS
Conclusion
 The corDECT wireless local loop system offers relatively low cost and rapid installation of telecom services in areas with even high subscriber density environments.
 Good Market in developing Countries like India, Russia, China etc.
 Good for highly dense urban areas