Random Access Signal Transmission for Beam Mismatch Delay
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Solution Overview
Problem
In future network systems, the mismatch between terminal device and network device beams during random access can lead to failed attempts, resulting in increased delay due to the need for retransmission of random access signals.
Innovation Solution
A method where the terminal device continuously transmits random access signals and detects responses across multiple transmission times and windows, continuing to transmit if no response is received, thereby reducing the delay by optimizing beam usage and response detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device retransmits the random access signal after failure to receive response, then the random access reliability is improved, but the random access delay increases
Solution Approach 1:
The terminal device performs preliminary actions by continuously transmitting random access signals multiple times before giving up, and by monitoring the random access response window for each transmission. This ensures that if the beam mismatch is temporary or resolvable, the device has already attempted recovery actions rather than immediately declaring failure and restarting the process
Solution Approach 2:
The terminal device maintains continuous useful action by repeatedly transmitting random access signals and continuously monitoring for responses without interruption. The device does not stop monitoring the response window even after transmission failure, and immediately retransmits upon detecting no response, ensuring the random access process continues without idle gaps
2Reliability
If the terminal device continuously transmits random access signals multiple times, then the probability of successful access is improved, but the complexity of the access process increases
Solution Approach 1:
The random access process is segmented into distinct transmission attempts, each with its own dedicated response window. The terminal device divides the access process into multiple independent transmission phases (first transmission with first response window, second transmission with second response window, etc.), making it easier to track and manage each attempt separately
Solution Approach 2:
The terminal device performs preliminary configuration by establishing multiple response windows in advance, each corresponding to a specific transmission attempt. This preliminary setup allows the device to systematically monitor for responses without ad-hoc decision-making during the access process, reducing operational complexity
Data Source
AI summary
A method for random access includes: continuously transmitting, by a terminal device, at least one random access signal to a network device; detecting, by the terminal device, a random access response transmitted by the network device in a random access response window corresponding to continuous transmissions in multiple times of random access signals, wherein the continuous transmissions in multiple times of the random access signals comprise continuous transmission of the at least one random access signal; continuing to transmit, by the terminal device, a subsequent random access signal to the network device if the terminal device fails to detect the random access response transmitted by the network device before ending of the random access response window.