5G NR Random Access Data Configuration for Reliable Terminal Detection
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Solution Overview
Problem
Insufficient studies on random access methods in 5G New Radio (NR) have hindered efficient and effective implementation of 2-step random access procedures, particularly in configuring the data part of the random access signal, which affects reception quality and identification of transmitting terminals.
Innovation Solution
A transmission apparatus and method that control the configuration of the data part in a random access signal based on parameters related to the transmission, including determining the number of ranks and antenna ports, using orthogonal resources for demodulation reference signals, and adjusting transmission diversity and precoding based on the type of random access procedure (CBRA or CFRA).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data part configuration is not optimized based on transmission parameters, then the random access procedure can be implemented, but reception quality and terminal identification efficiency deteriorate
Solution Approach 1:
The patent applies dynamics by making the data part configuration adjustable based on transmission parameters. The number of antenna ports, ranks, and reference signal resources are dynamically selected according to the random access type (CBRA/CFRA) and transmission conditions, allowing the system to adapt to different scenarios and optimize both reception quality and identification efficiency
Solution Approach 2:
The patent changes key parameters including the number of antenna ports (1 or 2), ranks (1 or 2), and reference signal resources based on transmission parameters. By adjusting these parameters according to the random access type and channel conditions, the system resolves the contradiction between reliable reception and efficient terminal identification
2Speed
If transmission resources are not optimized, then random access can proceed, but transmission latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring transmission parameters and data part structures based on the random access type before actual transmission. The terminal and base station agree on the configuration in advance, enabling faster processing and reducing transmission latency during the random access procedure
Solution Approach 2:
The system dynamically adjusts transmission resources including the number of antenna ports, ranks, and reference signal configurations based on the random access type and channel conditions. This dynamic optimization enables faster random access by selecting the most efficient configuration for each transmission scenario
3Ease of manufacture
If the data part configuration is simplified, then implementation is easier, but reception quality and terminal identification capability deteriorate
Solution Approach 1:
The patent segments the random access message into distinct parts (message A with preamble and data part) with specific configurations for each. The data part is further segmented into reference signals and data payload, with independent configuration options. This segmentation allows flexible implementation while maintaining identification precision through dedicated reference signals
Solution Approach 2:
The patent applies local quality by configuring different parameters for different parts of the transmission. The reference signal portion uses specific antenna ports and resources optimized for channel estimation and terminal identification, while the data payload uses appropriate modulation and coding. This localized optimization maintains identification precision without overly complicating the overall implementation
Data Source
AI summary
In the present invention, a terminal can appropriately perform a random-access process. In a terminal (100), a wireless transmission unit (111) transmits a random-access signal including at least a data part. A rank determination unit (107) controls the configuration of the data part on the basis of a parameter regarding the transmission of the random-access signal.