Licensed Assisted Access Channel Selection via Mobile Station Reporting
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Solution Overview
Problem
The Licensed Assisted Access (LAA) technology has limitations in network resource use efficiency due to interference in contention regions and inability to reuse network resources in contention-free regions, leading to increased load on base stations as the number of mobile stations grows.
Innovation Solution
A mobile station determines the use status of unlicensed bands, generates available unlicensed channel group information, and transmits it to a base station, allowing the base station to select an unlicensed channel and initiate a communication schedule assessment procedure, thereby improving network resource utilization and reducing base station load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station is responsible for band selection and LBT procedure of all mobile stations, then the network resource use efficiency can be maintained, but the load of the base station becomes a bottleneck as the number of mobile stations increases
Solution Approach 1:
The patent divides the channel selection task into two parts: mobile stations independently select channels from groups provided by the base station, rather than the base station managing all channel selection directly. This segmentation reduces base station load while maintaining efficient resource allocation through the group-based approach.
Solution Approach 2:
The base station acts as an intermediary by providing channel group information to mobile stations, which then independently select channels. This intermediary approach allows the base station to maintain oversight of resource allocation without bearing the full burden of direct channel management for all stations.
2Productivity
If different base stations select the same unlicensed band, then the network resource cannot be reused in contention-free region, but if they select different bands, then communication interference is formed in contention region
Solution Approach 1:
The patent segments unlicensed channels into multiple groups and assigns different groups to different base stations. This segmentation allows spatial reuse of spectrum resources while preventing interference through proper group allocation, resolving the contradiction between resource reuse and interference avoidance.
Solution Approach 2:
Different base stations are assigned different channel groups based on their local geographic conditions and interference environments. This local quality approach allows each base station to operate on channels optimized for its specific location, enabling resource reuse while avoiding interference in contention regions.
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.