Random Access Signal Timing Overlap for Reduced Latency
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Solution Overview
Problem
In the existing LTE random access process, terminals experience significant delays due to the need to resend random access signals after a time window for detecting responses has ended, leading to prolonged delays when multiple attempts are necessary.
Innovation Solution
The method involves sending a first random access signal via a first resource and a second random access signal via a second resource, with the start time of the second signal's transmission period set earlier than the end time of the first response signal's detection period, allowing the terminal to send the second signal before the detection period for the first response has ended, thereby reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal waits for the detection period to end before sending the second random access signal, then the terminal can avoid detecting multiple response signals, but the time delay for multiple random access attempts increases significantly
Solution Approach 1:
The terminal sends the second random access signal in advance, before the detection period of the first random access signal ends. This preliminary action allows the terminal to prepare and transmit the next random access signal without waiting for the current detection period to complete, thereby reducing the total time delay for multiple random access attempts and improving overall access efficiency.
2Ease of operation
If the terminal sends multiple random access signals sequentially after detection period ends, then the terminal follows the existing protocol, but the random access process becomes prolonged when multiple attempts are needed
Solution Approach 1:
The patent introduces dynamic timing adjustment where the terminal can adaptively send subsequent random access signals during the detection period rather than waiting for it to end. This dynamic approach optimizes the timing of random access signal transmission, reducing unnecessary waiting time while maintaining protocol compliance, thus shortening the overall random access process duration.
Data Source
AI summary
Embodiments of the present application provide a random access method and apparatus. The method includes: in a random access process, a terminal sends a first random access signal by means of a first resource first, and then sends a second random access signal by means of a second resource; and the terminal receives at least one of a first random access response signal and a second random access response signal, a start time of a transmission time period of the second random access signal being earlier than an end time of a detection time of the first random access response signal.