Cell Search Signal Requesting for Low-Overhead 6G Synchronization
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Solution Overview
Problem
The increased use of high frequencies in 6G wireless communication systems leads to higher signaling overhead due to the need for more synchronization signals and reference signals, especially with narrow beams, which is inefficient and can result in resource collisions and delayed cell search.
Innovation Solution
A terminal is equipped with a transmitting unit to request a cell search signal and a receiving unit to identify information related to a cell, allowing for aperiodic cell search signals to be used based on demand, reducing signaling overhead by enabling autonomous resource determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If many narrow beams are used to compensate for path loss in high frequency bands, then communication reliability is improved, but signaling overhead increases due to more synchronization signals and reference signals
Solution Approach 1:
The patent applies periodic action by transmitting cell search signals at predetermined periodic intervals rather than continuously or for every beam. The terminal waits for periodic signals and only initiates cell search when needed, reducing the total number of signals transmitted while maintaining reliable communication through the regular timing pattern.
Solution Approach 2:
The terminal performs autonomous determination of resources to use for transmission without requiring base station control. The terminal independently decides when to transmit request signals and how to handle cell search based on its own needs, reducing signaling overhead while maintaining communication reliability through self-managed resource allocation.
2Device complexity
If autonomous resource determination is implemented, then signaling overhead is reduced, but resource collision probability increases
Solution Approach 1:
The base station transmits cell search signals in advance at predetermined periodic intervals before the terminal needs to perform cell search. This preliminary action ensures that the terminal can receive necessary synchronization information without needing to request it, thereby reducing signaling overhead while preventing resource collisions through advance preparation.
Solution Approach 2:
The terminal transmits request signals to the base station, providing feedback about its cell search needs. The base station receives this feedback and adjusts its signal transmission accordingly, creating a feedback loop that coordinates resource usage between terminal and base station, reducing collisions while maintaining low signaling overhead.
3Productivity
If cell search signals are transmitted frequently, then cell search speed is improved, but signaling overhead increases
Solution Approach 1:
The patent uses periodic action by transmitting cell search signals at predetermined intervals rather than continuously. The terminal waits for these periodic signals and performs cell search when needed, achieving fast cell search capability while reducing signaling overhead through the regular timing pattern that avoids unnecessary transmissions.
Solution Approach 2:
The terminal autonomously determines when to perform cell search based on its own needs and requests signals from the base station accordingly. This self-service approach allows the terminal to maintain fast cell search speed by initiating searches only when necessary, reducing signaling overhead by avoiding unnecessary frequent transmissions.
Data Source
AI summary
A terminal has: a transmitting unit configured to transmit, to a communication device, a requesting signal that requests transmission of a cell search signal; and a receiving unit configured to receive the cell search signal transmitted based on the requesting signal and identify information related to a cell.