Mobile Station Unlicensed Channel Selection for LAA Load Reduction
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Solution Overview
Problem
Conventional Licensed Assisted Access (LAA) technology has low network resource use efficiency due to interference in unlicensed bands and high base station load, as base stations dominate band selection and Listen Before Talk procedures.
Innovation Solution
A mobile station determines the use status of unlicensed bands, generates available channel group information, and transmits it to the base station, allowing the base station to select an unlicensed channel for communication scheduling, thereby reducing base station load and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations dominate band selection and Listen Before Talk procedures in conventional LAA technology, then communication control is centralized, but network resource use efficiency is low and base station load becomes a bottleneck
Solution Approach 1:
Mobile stations autonomously perform Listen Before Talk procedures and select unlicensed bands independently, without requiring base station coordination. Each mobile station monitors channel availability and makes its own transmission decisions, eliminating the base station bottleneck while maintaining reliable communication control through standardized protocols.
Solution Approach 2:
The centralized band selection and LBT procedure are segmented and distributed to individual mobile stations. Instead of one base station controlling all mobile stations, each mobile station independently performs channel assessment and selection, dividing the centralized control function into multiple autonomous units that operate in parallel.
2Device complexity
If different base stations select the same unlicensed band, then band selection is simplified, but communication interference is formed in contention regions
Solution Approach 1:
Mobile stations perform Listen Before Talk by monitoring the unlicensed band for existing transmissions before transmitting. This feedback mechanism detects channel occupancy and prevents transmissions that would cause interference, allowing multiple base stations to operate in the same band without conflict through decentralized channel assessment.
Solution Approach 2:
Mobile stations conduct channel assessment and Listen Before Talk procedures before initiating transmissions. By performing these preliminary actions, mobile stations ensure the channel is clear of other transmissions, preventing interference from occurring in the first place rather than resolving it after the fact.
3Object-affected harmful factors
If different base stations select different unlicensed bands, then interference is avoided, but network resource cannot be reused in contention free regions
Solution Approach 1:
Mobile stations dynamically select from multiple unlicensed bands based on real-time channel conditions and availability. Instead of being assigned fixed bands, mobile stations can switch between different unlicensed bands (e.g., 5 GHz, 6 GHz) depending on which channels are currently available, optimizing resource reuse while avoiding interference through adaptive parameter selection.
Data Source
AI summary
A licensed assisted access network system is provided. The licensed assisted access network system includes a mobile station and a first base station. The mobile station determines a use status of an unlicensed band and generates first available unlicensed channel group information. The mobile station transmits the first available unlicensed channel group information to the first base station. The first base station selects a first unlicensed channel according to the first available unlicensed channel group information. The first base station initializes a communication schedule assessment procedure with the mobile station through the first unlicensed channel.