Random Access Signal Beam Alignment in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing random access procedures, particularly in next-generation systems that require high competitiveness, low cost per bit, and flexible frequency band use.
Innovation Solution
The method involves transmitting multiple random access signals corresponding to different beams to a base station, receiving a random access response signal, and then transceiving signals using the corresponding beam, with each random access signal including identifier information of the user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple random access signals are transmitted using different beams, then beam alignment accuracy is improved, but transmission time and procedure complexity increase
Solution Approach 1:
The random access procedure is segmented into parallel beam-specific operations. Multiple random access signals are transmitted simultaneously through different beams rather than sequentially, dividing the access procedure into concurrent transmission paths that can be independently processed and evaluated for optimal beam alignment.
Solution Approach 2:
Beam information is embedded in advance within the random access signals themselves. The base station pre-configures multiple beams with their respective information, and the user equipment selects and transmits through the appropriate beam without requiring additional preliminary beam selection procedures, thereby reducing latency while maintaining alignment accuracy.
2Loss of information
If beam information is embedded in random access signals, then identifier recognition is improved, but signal complexity increases
Solution Approach 1:
Beam information and user equipment identifier information are merged into a single integrated random access signal structure. This combination allows the base station to simultaneously identify both the transmitting UE and the optimal beam without requiring separate signaling procedures, thereby improving identifier recognition while managing signal complexity through unified processing.
Solution Approach 2:
The random access signal is designed with multi-functionality to simultaneously serve as an identifier carrier, beam indicator, and synchronization signal. This universal signal structure eliminates the need for multiple specialized signals, reducing overall system complexity while enhancing information recognition accuracy through consolidated signal processing.
Data Source
AI summary
Disclosed in the present application is a method for a terminal performing a random access procedure in a wireless communication system. Specifically, the method for performing a random access procedure comprises the steps of: transmitting, to a base station, a plurality of random access signals corresponding to a plurality of different beams in a transmission interval corresponding to the corresponding random access signal; receiving a random access response signal corresponding to one random access signal of the plurality of random access signals; and transmitting and receiving a signal to and/or from the base station, using a beam corresponding to the one random access signal, wherein the plurality of random access signals comprise identifier information of the terminal.