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Technology Stocks : Interdigital Communication(IDCC)

IDCC 327.95

+0.2%

Nov 21 9:30 AM EST

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To: Jim Lurgio who wrote (3708)	1/30/2000 10:17:00 PM
From: Gus	of 5195

Jim, 2 interesting articles from Telecommunications Online: Third Generation Mobile: From Perception to Fact Dan Gardiner is a consultant at Ovum telecommagazine.com As the mobile industry shifts from being infrastructure-driven to service-led, deployment of 3G should be reconsidered in terms of the services it is able to provide rather than the technology it is based on. Only this will ensure that the complex decisions of whether, when and how to implement 3G will be made correctly. It is those operators with the best services that will be most competitive; not those with the best technology. Hyping up the Wireless LAN Martin Johnsson is product manager for wireless LAN systems with Ericsson Radio Systems. For more information on the HiperLAN/2 Global Forum visit webite: hiperlan2.com telecommagazine.com The air interface is based on time-division duplex (TDD) and dynamic time-division multiple access (TDMA). This time-slotted structure of the medium allows for simultaneous communication in both downlink and uplink within the same time frame, called MAC frame in HiperLAN/2. Time slots for downlink and uplink communication are allocated dynamically depending on the need for transmission resources. The basic MAC frame structure on the air interface has a fixed duration of two metres and comprises transport channels for broadcast control, frame control, access control, downlink (DL) and uplink (UL) data transmission and random access.

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