Aggregating licensed & unlicensed spectrum with LTE-U
For operators solving the 1000x challenge, licensed spectrum is the foundation. At the same time, unlicensed spectrum in the 5 GHz band can be used to effectively augment the capacity. Through carrier aggregation technique, LTE in the unlicensed spectrum is combined with LTE in the licensed band, while the later becoming the anchor, carrying all the control and signaling information. Because of licensed anchor and other features, LTE-U offers better efficiency and robust mobility. So, LTE-U really means higher performance for operators, enhanced experience for users, and a common unified network for all spectrum types.
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Enhanced user experience.
Since LTE-U uses the same technology, same network and same small cells for both licensed and unlicensed bands, users experience seamless mobility. Carrier aggregation between the licensed and unlicensed bands creates a fatter data pipe as well as the anchor in the licensed spectrum provides reliability. In essence, with LTE-U, users get an enhanced mobile broadband experience.
~2x more capacity and coverage
LTE-U provides better performance than carrier Wi-Fi. The higher capacity can also be used to extend the coverage. Higher capacity combined with a unified LTE network means cost savings to operators, in terms of network deployment, operation and management.
Learn more about LTE-U technical details
LTE-U is a good neighbor to Wi-Fi: Going far beyond minimum requirements
To ensure fair coexistence, LTE-U, apart from adhering to spectrum regulations, will also support relevant standards with coexistence features, as well as go through rigorous conformance testing before commercialization. The deployments in countries such as USA, Korea, China and India will use Rel 10/11/12 with coexistence features such as CSAT, and regions such as Europe and Japan that have LBT requirements will use Rel 13 LAA – Licensed Assisted Access.
Qualcomm has demonstrated the LTE-U/Wi-Fi fair coexistence at many global events such as CES 2014, and MWC ( 2014 and 2015).
Learn more about LTE-U/Wi-Fi coexistence: CSAT; LBT
LTE Advanced in Unlicensed Spectrum
LBT – Listen Before Talk; CSAT – Carrier Sensing Adaptive Transmission; LAA – Licensed Assisted Access
Early commercialization using existing standards.
LTE-U can be deployed with the existing LTE Advanced standards (3GPP Rel. 10/11/12) in countries such as USA, Korea China, and India. For regions such as Europe and Japan that have LBT channel occupancy requirements, LTE waveform has to be modified. The changes are part of a Rel 13 study item, referred to as LAA – Licensed Assisted Access.
LTE-U has seen a strong industry support with many product announcements, field trials, and demo from leading operators and vendors.
Qualcomm is committed to making the best use of unlicensed spectrum—Evolving Wi-Fi for local access for private and enterprise users, supporting LTE-U and LTE – Wi-Fi link aggregation for operators and more.
View Qualcomm Technologies’ LTE-U press release
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