Timing advance for beamforming systems

By adopting beam-specific TA adjustment and TA measurement mechanisms in the non-reciprocal beamforming system, the problem of difficulty in accurate TA adjustment during beam switching is solved, and the beamforming gain and channel efficiency of the system are improved.

CN113242595BActive Publication Date: 2025-03-25APPLE INC
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Patent Information

Application Number
CN202110530378.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2017-03-17
Filing Date
2017-07-28
Publication Date
2025-03-25
Estimated Expiration
2037-07-28

AI Technical Summary

Technical Problem

In a non-reciprocal beamforming system, the timing advance amount (TA) adjustment caused by beam switching is difficult to accurately determine, resulting in time difference errors between channel clusters, affecting the beamforming gain and channel efficiency of the system.

Method used

The beam-specific TA adjustment and TA measurement mechanism are used to reduce the time difference error between channel clusters by performing TA estimation in the initial access phase and updating TA during beam switching.

Benefits of technology

It effectively reduces inter-panel self-interference in multi-beam operation, and improves the system's beamforming gain and channel efficiency in the high frequency band.

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Abstract

An apparatus of a user equipment (UE) is described. The apparatus may include a first circuit, a second circuit, and a third circuit. The first circuit is operable to determine a preferred UE beam. The second circuit is operable to generate a physical random access channel (PRACH) transmission associated with a preferred eNB beam for transmission on the preferred UE beam. The third circuit is operable to process a random access response (RAR) transmission carrying a timing advance (TA) received via the preferred UE beam. The apparatus may also include an interface for sending a PRACH transmission to a transmitting circuit and for receiving a RAR transmission from a receiving circuit.
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