Ad Hoc 5G Base Station SSB Frequency Selection for Low Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ad hoc radio base stations operating in parallel with existing 5G NR cells face challenges in flexible and easy operation due to minimal pre-planning and limited cooperation with cellular networks, necessitating sophisticated interference management.
Innovation Solution
The ad hoc radio base station analyzes existing 5G NR cells to select frequencies for its synchronization signal block (SSB) that either avoid or overlap with existing cells based on power and bandwidth considerations, using techniques like setting global synchronization channel numbers and transmission powers to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ad hoc radio base station transmits SSB on the same frequency as existing cells, then it can operate with minimal frequency planning, but it causes interference with existing cells
Solution Approach 1:
The patent dynamically changes the frequency parameter of the SSB transmission based on measured RSRP values from existing cells. When RSRP exceeds a threshold, the system selects a different frequency for SSB transmission, thereby adapting the transmission parameters to current environmental conditions and avoiding interference with existing cells.
2Object-affected harmful factors
If the ad hoc radio base station selects frequency to avoid overlap with existing cells, then interference is minimized, but frequency selection becomes more complex
Solution Approach 1:
The ad hoc radio base station performs self-configuration by automatically measuring RSRP from existing cells and autonomously selecting appropriate SSB frequencies. The system uses its own transceiver to detect existing cell signals and makes independent frequency selection decisions without requiring external network coordination or manual configuration, thereby reducing operational complexity despite the sophisticated frequency selection algorithm.
3Area of stationary object
If the ad hoc radio base station uses high transmission power, then its coverage range increases, but it causes more interference to existing cells
Solution Approach 1:
The patent dynamically adjusts the SSB transmission frequency based on RSRP measurements. When existing cells have high RSRP (indicating strong signal presence), the system switches to alternative frequencies to avoid interference. This allows the ad hoc base station to maintain higher transmission power for coverage while intelligently selecting frequencies that minimize interference with existing cellular infrastructure.
Data Source
AI summary
An ad hoc radio base station obtains information regarding existing 5G NR SA cells; for each existing cell, performs an analysis by detecting a frequency of a synchronization signal block, of the existing cell from the information, decoding a radio frequency, bandwidth of the existing cell from the information, and measuring a reference signal received power of the existing 5G NR SA cell. The station also sets up an ad hoc 5G NR SA cell based on the analysis.