Random Access Beam Signaling for Antenna Panel Activation Delay
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in establishing connections between wireless devices and base stations due to delays in antenna panel activation and inaccurate power determination during random access procedures, leading to suboptimal control signaling and transmission power management.
Innovation Solution
Implementing methods to account for antenna panel activation delays and improve power determination by using control messages that indicate downlink beams, uplink beams, and antenna panels for efficient random access procedures, enhancing beam management and power control signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antenna panel activation is implemented for uplink transmission, then transmission reliability is improved, but activation delay increases the time required to establish connection
Solution Approach 1:
The base station sends a control message indicating the antenna panel to be used for uplink transmission before the actual transmission occurs. This preliminary indication allows the wireless device to prepare the antenna panel in advance, reducing the activation delay while maintaining transmission reliability.
2Measurement precision
If downlink beam measurement is used for uplink power determination, then power control accuracy is improved, but the complexity of control signaling increases
Solution Approach 1:
The control message serves multiple functions: it indicates the downlink beam for measurement, specifies the uplink beam to be used, and identifies the antenna panel for transmission. By combining multiple indications into a single control message, the patent maintains power determination accuracy while reducing control signaling complexity.
3Measurement precision
If multiple control indications are sent for beam and panel management, then connection establishment accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the downlink beam indication, uplink beam indication, and antenna panel indication into a single control message. This consolidation maintains the accuracy of connection establishment by preserving all necessary information while reducing signaling overhead by eliminating the need for separate messages for each indication.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A base station and/or a wireless device may perform a random access procedure. A downlink transmission for initiating a random access procedure may indicate an antenna panel for transmission of a random access preamble. A slot for transmission of the random access panel, from the wireless device, may be determined based on an antenna panel activation delay.