Dynamic Frequency Band Selection for Radio Connections
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Solution Overview
Problem
Conventional radio connections between mobile stations and base stations often inefficiently use the same frequency band for uplink and downlink communications, leading to inefficiencies due to differing propagation characteristics and supported data rates across different frequency bands.
Innovation Solution
A method and system that configures multiband mobile stations and base stations to initially use the same frequency band for uplink and downlink communications, but then dynamically switch to different frequency bands based on distance and load balancing considerations, allowing the RAN to select optimal frequency bands for uplink and downlink frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same frequency band is used for both uplink and downlink communications, then the system complexity is reduced and ease of operation is improved, but the resource utilization efficiency deteriorates due to differing propagation characteristics and data rate capabilities across frequency bands
Solution Approach 1:
The patent segments the frequency band selection process into two independent decisions: uplink frequency band selection based on mobile station distance, and downlink frequency band selection based on base station load. This allows each direction to use the most appropriate frequency band independently, improving resource utilization while maintaining operational simplicity through automated selection based on measured parameters.
2Productivity
If different frequency bands are selected for uplink and downlink based on propagation characteristics and load conditions, then the radio resource utilization efficiency is improved, but the system complexity increases due to dynamic frequency band selection and reconfiguration
Solution Approach 1:
The patent implements feedback mechanisms where the base station measures mobile station distance (e.g., through timing advance or signal strength) and monitors frequency band load conditions. Based on this feedback, the system dynamically selects optimal frequency bands for uplink and downlink, and informs the mobile station of the selection. This automated feedback-driven approach reduces the perceived complexity for users while achieving efficient resource utilization.
3Adaptability or versatility
If dynamic frequency band switching is implemented after connection establishment, then the adaptability to changing conditions is improved, but the frequency of configuration changes and potential disruption increases
Solution Approach 1:
The patent enables dynamic frequency band selection where the base station can change the operating frequency bands after connection establishment based on changing conditions such as mobile station movement or load variations. The system monitors conditions continuously and performs reconfiguration only when beneficial, balancing adaptability with operational stability. The mobile station is informed of changes through signaling, allowing smooth transitions.
Data Source
AI summary
A base station of a radio access network (RAN) and a multiband mobile station are configured for wireless communication in a plurality of frequency bands. The RAN selects a configuration of uplink and downlink frequencies for a radio connection between the base station and multiband mobile station. The uplink and downlink frequencies in the selected configuration are in different frequency bands. The RAN may select a frequency band for the uplink frequency based, at least in part, on a distance between the multiband mobile station and the base station. That RAN may select a frequency band for the downlink frequency based, at least in part, on respective downlink loads at the base station for the first, second, and third frequency bands.