Combined Beam Sweeping Procedure for Wireless Signaling
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Solution Overview
Problem
Current wireless communications systems experience high signaling and computational overhead, as well as extended time delays due to multi-phase beam sweeping procedures, leading to unnecessary power expenditures, inefficient resource use, decreased battery life, and poor user experience.
Innovation Solution
The system combines multiple signals into single signals and allows the base station and user equipment to autonomously update the transmission configuration indicator state based on channel state information reports, reducing the need for explicit reconfiguration messages and optimizing beam sweeping procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multi-phase beam sweeping procedures are used to identify transmit and receive beams, then beam identification accuracy is improved, but signaling overhead and computational overhead increase
Solution Approach 1:
The patent combines multiple beam sweeping procedures into a single unified procedure. Specifically, it merges the first beam sweeping procedure (for identifying transmit beams) and the second beam sweeping procedure (for identifying receive beams) into one combined procedure where a single set of reference signals is transmitted and measured to determine both transmit and receive beam pairs, thereby reducing signaling overhead while maintaining identification accuracy
Solution Approach 2:
The patent makes a single set of reference signals serve multiple functions. The same reference signals are used both for channel quality measurement and for beam pair identification, eliminating the need for separate reference signal sets for different purposes. This multi-functional approach reduces the overall signaling overhead while preserving the ability to accurately identify beams
2Reliability
If multiple sets of reference signals are transmitted for separate beam sweeping procedures, then beam identification completeness is improved, but processing overhead and time delays increase
Solution Approach 1:
The patent merges the transmission of multiple reference signal sets into a single reference signal transmission. By combining the first and second beam sweeping procedures into one procedure using one set of reference signals, the processing overhead is reduced while the system maintains complete beam identification capability through joint determination of transmit and receive beam pairs
3Measurement precision
If explicit reconfiguration messages are exchanged for TCI state updates, then configuration accuracy is improved, but time delays and signaling overhead increase
Solution Approach 1:
The patent enables the user equipment to autonomously determine and update the transmission configuration indicator state without requiring explicit reconfiguration messages from the base station. The UE uses the channel quality information from the combined beam sweeping procedure to self-determine the optimal TCI state, eliminating the need for time-consuming explicit signaling exchanges while maintaining configuration accuracy
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some examples, a base station may transmit, to a user equipment (UE), configuration information for both a first set of reference signals for a first beam sweeping procedure and a second set of reference signals for a second beam sweeping procedure. The UE may receive the first set of reference signals according to the configuration information, and may transmit a channel state information (CSI) report to the base station based on the received reference signals. After transmitting the CSI report, both the base station and the UE may autonomously update a transmission configuration indicator (TCI) state based on the CSI report (e.g., using a preferred transmit beam indicated in the CSI report). The base station may transmit on the preferred transmit beam, and the UE may receive on various candidate receive beams, the second set of reference signals.