CDMA2000 1xEV-DO (1x Evolution Data Optimized) is a third-generation (3G) wide-area wireless technology that delivers high-speed mobile broadband information, communication and entertainment applications to millions of subscribers. 1xEV-DO is now evolving to 1xEV-DO Rev A - a revision of the standard that supports a peak reverse link (uplink) speed of 1.8 Mbps, Quality of Service (QoS) and low latency. These enhancements enable Rev A to be first 3G standard to support delay sensitive applications like Voice over IP (VoIP) with quality and capacity comparable to circuit-switched voice networks. 1xEV-DO Rev A also supports push-to-talk with a sub-second call setup time and mulitcast.
Airvana's innovative IP-RAN architecture underpins all of Airvana's product offerings and brings Internet Protocol (IP) into the radio access network (RAN). Unlike traditional architectures that use proprietary protocols and mandate a strict Radio Node to Radio Network controller hierarchy, Airvana's IP-RAN architecture uses IP to enable each RN to communicate with multiple RNCs. This one-to-many relationship between RNs and RNCs facilitates scaling, provides inherent reliability and minimizes the performance-degrading boundaries found in traditional architectures.
Though first implemented as part of Airvana's 1xEV-DO RAN products, the IP-RAN architecture is applicable to any mobile broadband air interface.
