For future reference:
Whatever the theoretical advantages of 2g CDMA over 2g TDMA (3 to 1, infinity?), the industry R&D scale in TDMA/GSM is producing improvements that increase capacity ranging from 80% (CDTS) to 100% (LU) to 250% (ERICY). More and more people are coming to the realization, long-held by some of the major players in the industry, that WCDMA is going to be the upgrade path to 3G.
More band for the buck--it's desperately needed by every wireless service provider as customers fill available spectrum with voice and then demand data services, too. Help for time division multiple access (TDMA) operators is coming soon from a batch of new techniques that stretch network capacity and expand network capabilities, such as flexible channel allocation, dynamic downlink power control, intelligent phased-array antennas, discontinuous transmission and software-defined wideband radio.
These IS-136-compatible techniques can boost capacity on TDMA networks by up to 100 percent, usually with just a new software load. They make smart radios smarter. Some of them also deliver dynamic bandwidth so data callers can access unified messaging services or the Internet. Most are already in field trials. Because they depend on software, they make use of existing hardware, protecting providers' investments. Finally, the techniques expand capacity and thus give operators a leg up in planning for third generation (3G) wireless services requiring high data transmission to support multimedia services.
New Developments Expand TDMA Network Capacity
telecommagazine.com |
