link interference cancellation), multi-carrier links, and smart network management technologies. In November 2008, Qualcomm, UMB's lead sponsor, announced it was ending development of the technology, favoring LTE instead. This followed the announcement that most CDMA carriers chose to adopt either WiMAX or the competing LTE standard as their 4G technology. In fact no carrier had announced plans to adopt UMB. However, during the ongoing development process of the 4G technology, 3GPP added some functionalities to LTE, allowing it to become a sole upgrade path for all wireless networks. Features OFDMA-based air interface Frequency Division Duplex Scalable bandwidth between 1.25–20 MHz (OFDMA systems are especially well suited for wider bandwidths larger than 5 MHz) Support of mixed cell sizes, e.g., macro-cellular, micro-cellular & pico-cellular. IP network architecture Support of flat, centralized and mixed topologies Data speeds over 275 Mbit/s downstream and over 75 Mbit/s upstream Significantly higher data rates & reduced latencies using Forward Link (FL) advanced antenna techniques MIMO, SDMA and Beamforming Higher Reverse Link (RL) sector capacity with quasi-orthogonal reverse link Increased cell edge user data rates using adaptive interference management Dynamic fractional frequency reuse Distributed RL power control based on other cell interference Real time services enabled by fast seamless L1/L2 handoffs Independent RL & FL handoffs provide better airlink and handoff performance Power optimization through use of quick paging and semi-connected state Low-overhead signaling using flexible airlink resource management Fast access and request using RL CDMA control channels New scalable IP architecture supports inter-technology handoffs New handoff mechanisms support real-time services throughout the network and across different airlink technologies Fast acquisition and efficient multi-carrier operation through use of beacons Multi-carrier configuration supports incremental deployment & mix of low-complexity & wideband devices See also 3GPP2 4G CDMA2000 Evolved EDGE Flash-OFDM High-Speed Downlink Packet Access or HSDPA Mobile broadband Mobile broadband modem OFDM List of device bandwidths List of Evolution-Data Optimized network equipment suppliers List of CDMA2000 networks LTE Simultaneous Voice and EV-DO data (SVDO) WiMAX Notes and references External links 3GPP2 CDMA2000 standards and specification documents CDMA Development Group (CDG) EVDOforums.com EV-DO discussion group A video demonstration of EVDO Rev. B capabilities Code division multiple access 3rd Generation Partnership Project 2 standards