Uplink Spectrum Reuse via Position-Based Scheduling
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Solution Overview
Problem
In wireless communication networks, the overlapping of cells leads to interference when base stations reuse channels, resulting in under-utilization of the predefined channel and interference issues among mobile stations.
Innovation Solution
Implementing a method that schedules mobile stations based on their position, allowing base stations to reuse channels allocated to collocated stations within a predetermined inner region while limiting the power level to avoid interference, and using a central controller to manage the re-use index and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations reuse channels allocated to collocated base stations to improve channel utilization, then channel utilization is improved, but interference between mobile stations in overlapping coverage areas increases
Solution Approach 1:
The patent applies local quality by differentiating the treatment of mobile stations based on their spatial location relative to the base station. Mobile stations are divided into two groups: those in the inner region (closer to the base station) and those in the outer region (closer to collocated base stations). The patent assigns different channel allocation strategies to these local groups - allowing channel reuse for inner region stations while restricting reuse for outer region stations, thereby locally optimizing the balance between channel utilization and interference management.
Solution Approach 2:
The patent segments the mobile station population based on their position relative to the base station and collocated base stations. By dividing mobile stations into inner and outer regions, the system can apply different channel reuse policies to each segment. This segmentation allows the system to maximize channel utilization for inner region stations while protecting outer region stations from excessive interference, thus resolving the contradiction between productivity and harmful factors.
2Object-affected harmful factors
If base stations operate only on their native channel to avoid interference, then interference is minimized, but channel utilization is reduced
Solution Approach 1:
The patent introduces dynamic channel allocation based on the operational status of collocated base stations. The system dynamically determines which mobile stations can access re-used channels and which cannot, based on real-time conditions. This dynamic approach allows the system to adapt channel utilization to current network conditions, maximizing productivity when possible while maintaining interference-free operation when necessary.
Data Source
AI summary
A method of managing communication in the wireless communication network having a plurality of Base Stations (BSs) is provided. Each BS provides communication to one or more Mobile Stations (MSs) in an associated cell. The method includes re-using at a BS, channel allocated to collocated BSs to communicate with MSs located in a first predetermined region in a cell of the BS. The method further includes scheduling MSs located in the first predetermined region based on the position of each MS relative to the BS. The MSs are scheduled using one or more of channels allocated to the collocated BSs and a native channel of the BS. Further, the method includes scheduling MSs located in a second predetermined region based on the position of each MS relative to the BS. The MSs in the second predetermined region are scheduled using the native channel of the BS.