Systems and methods for beamformed uplink transmission

Abstract

Systems and methods described herein are provided for beamforming and uplink control and data transmission techniques. Such techniques enable a UE to maintain at least one beam process for operation with multiple beams and / or points. A beam process may be indicated for transmission or reception over a downlink or uplink physical channel. Power, timing, and channel state information may be specificto a beam process. A beam process may be established as part of a random access procedure in which resources may be provisioned in random access response messages. Techniques are provided to handle beam process failures, to use beam processes for mobility, and to select beams using open-loop and closed-loop selection procedures.

Description

[0001] Cross References to Related Applications [0002] This application is a non-provisional application of, and claims the benefit of, the following U.S. Provisional Patent Application under 35 U.S.C. 62 / 334,754; filed August 10, 2016, entitled "Systems and Methods for Beamformed Uplink Transmission (Systems and Methods for Beamformed Uplink Transmission)" and U.S. Provisional Patent Application Serial No. 62 / 373,076; and "Systems and Methods for Beamformed Uplink Transmission (Systems and Methods for Beamformed Uplink Transmission)" and U.S. Provisional Patent Application Serial No. 62 / 440,903. All of these applications are hereby incorporated by reference in their entirety. Background technique [0003] To meet the high data rates required by next-generation cellular communication systems, the wireless industry and academia have been exploring ways to take advantage of the large bandwidths available at very high frequencies, such as centimeter-wave and millimeter-wave f...

AI Technical Summary

Problems solved by technology

Rainfall and atmospheric gases (such as oxygen and vegetation) have the potential to further increase attenuation compared to frequencies below 6GHz

Also, at higher frequencies (e.g. at mmWave frequencies), penetration and diffraction attenuation can be more severe

[0005] All of these propagation characteristics have the potential to cause significant non-line-of-sight (NLOS) propagation path loss

For example, at mmWave frequencies, NLOS path loss can be more than 20dB higher than line-of-sight (LOS) path loss and severely limit the coverage of mmWave transmissions

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