Base Station Selection Using RSSI and Channel Occupancy
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Solution Overview
Problem
Current base station selection methods in wireless communications, particularly in unlicensed spectrums, fail to adequately consider parameters like probability of preemption and interference levels, limiting the flexible and independent operation of private networks.
Innovation Solution
The proposed solution involves using a method that evaluates base station suitability by incorporating Received Signal Strength Indicator (RSSI) and channel occupancy parameters to assess the probability of preemption and interference, allowing for more informed selection of communication nodes in both licensed and unlicensed spectrums.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional base station selection methods using only RSRP and RSRQ are used, then the selection process is simple, but the selection accuracy is insufficient because probability of preemption and interference levels are not considered
Solution Approach 1:
The patent combines multiple parameters (RSRP, RSRQ, RSSI, channel occupancy, probability of preemption, interference levels) into a unified base station suitability assessment mechanism. The network device collects and processes these parameters together to determine whether a base station is suitable for service interruption, resolving the contradiction by merging multiple measurement dimensions into a comprehensive evaluation system.
Solution Approach 2:
The patent introduces new parameters (RSSI, channel occupancy, probability of preemption, interference levels) to supplement traditional parameters (RSRP, RSRQ). By changing and expanding the parameter set used for base station assessment, the system achieves more accurate suitability evaluation while managing the increased complexity through systematic parameter collection and processing.
2Speed
If unlicensed spectrum is used with wider bandwidth for multi-Gbps data rates, then data rate capability is improved, but implementation complexity increases compared to smaller bandwidth carriers
Solution Approach 1:
The patent implements dynamic base station selection and service interruption determination mechanisms that adapt to varying channel conditions in unlicensed spectrum. The network device continuously assesses base station suitability based on real-time parameter measurements, allowing the system to dynamically optimize performance while managing complexity through adaptive rather than static configurations.
Solution Approach 2:
The patent establishes a feedback mechanism where the network device continuously monitors parameters (RSSI, channel occupancy, interference levels) and uses this information to determine base station suitability for service interruption. This feedback loop enables the system to maintain optimal performance in unlicensed spectrum by adjusting operations based on real-time channel conditions, thereby managing implementation complexity through intelligent control.
3Reliability
If LAA ties unlicensed spectrum to licensed spectrum via carrier aggregation, then licensed spectrum assistance is provided, but deployment flexibility and independent operation capability are limited
Solution Approach 1:
The patent segments the base station selection and service interruption determination processes into independent evaluation steps that can operate autonomously. The network device independently assesses base station suitability using unlicensed spectrum parameters without requiring licensed spectrum assistance, enabling flexible deployment scenarios including standalone unlicensed operations while maintaining the option for licensed-assisted access when beneficial.
Data Source
AI summary
A system and method for base station selection in licensed and unlicensed spectrums are disclosed herein. In one embodiment, a method performed by a communication device includes: receiving reference signals, wherein the reference signals are from a licensed spectrum or an unlicensed spectrum; determining a parameter value, based on the reference signals, associated with least one of a received signal strength indicator (RSSI) and a channel occupancy; and selecting a communication node in response to the parameter value meeting a condition.