CDG Completes CDMA2000 1X Advanced Specifications
September 4, 2009 // Published as a news service by IHS
The 3rd Generation Partnership Project 2 (3GPP2) published the specifications for CDMA Development Group (CDG) CDMA2000 1X Advanced.
1X Advanced allows 3G code division multiple access (CDMA) operators to increase the voice capacity of their CDMA2000 1X network by taking advantage of several interference cancellation and radio link enhancements, according to CDG.
Among these improvements are base transceiver station interference cancellation, improved power control, early frame termination and smart blanking. Operators can transition to 1X Advanced gradually while sustaining backward compatibility.
Advanced voice codecs like Enhanced Variable Rate Codec-B and the use of quasi-linear interference cancellation techniques were added to the 3GPP2 standard.
The next step would be to move to 1X Advanced, which is a channel card upgrade (expected to be commercial in the second half of 2010) with new devices supporting mobile receive diversity.
A complementary device enhancement known as simultaneous 1X Voice and Evolution-Data Optimized (EV-DO) Data (SVDO) will also become available during the same time frame and will enable CDMA2000 devices to access EV-DO packet data services while in an active 1X circuit-switch voice call.
For example, users will be able to access the Internet while on voice calls, and phones with global positioning system (GPS) can update maps or download real-time traffic information while on voice calls, etc. This device enhancement, which enables these concurrent voice and data services, is independent of the air link standard and infrastructure.
Source: CDMA Development Group (CDG).