Dynamic TDD Interference Management via Synchronous Buffer Regions
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Solution Overview
Problem
Current wireless communication systems face challenges in managing interference between operators, particularly in dynamic TDD configurations, where asynchronous operations across adjacent operators lead to mixed interference, and large guard bands are needed to mitigate this, resulting in wastage of valuable spectrum.
Innovation Solution
Divide bandwidth regions into asynchronous and synchronous TDD operation regions, with synchronous regions acting as a buffer between asynchronous regions, allowing for reduced or eliminated guard bands while maintaining minimal interference, by synchronizing subframe configurations at the edges of the bandwidth regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If large guard bands are used to mitigate interference between operators, then interference is reduced, but spectrum wastage increases
Solution Approach 1:
The bandwidth region is segmented into multiple subband regions, where each subband can be independently configured for synchronous or asynchronous TDD operation. This segmentation allows selective application of guard bands only where necessary (at boundaries between operators) while eliminating them within operator regions, thus reducing overall spectrum wastage while maintaining interference mitigation.
Solution Approach 2:
Different TDD synchronization configurations are applied to different subband regions based on local requirements. Synchronous TDD is applied in subbands requiring operator coordination to minimize interference, while asynchronous TDD is applied in subbands where flexibility is needed. This local differentiation optimizes the balance between interference reduction and spectrum utilization.
2Object-affected harmful factors
If synchronous TDD configurations are used across operators, then interference is minimized, but flexibility in bandwidth allocation is reduced
Solution Approach 1:
The bandwidth is divided into multiple subband regions that can be independently configured. Some subbands can operate with synchronous TDD configurations for interference minimization, while others can use asynchronous configurations for greater flexibility. This segmentation enables simultaneous achievement of both interference reduction and operational flexibility.
Solution Approach 2:
The system dynamically selects between synchronous and asynchronous TDD configurations for different subband regions based on traffic requirements and interference conditions. This dynamic configuration allows the network to adapt to changing conditions, providing flexibility while maintaining interference management where necessary.
3Adaptability or versatility
If asynchronous TDD operations are used across operators, then bandwidth flexibility is improved, but mixed interference increases
Solution Approach 1:
By segmenting the bandwidth into subband regions with different TDD configurations, the system can contain mixed interference to specific subbands while maintaining asynchronous operations in others. This localization of interference effects allows flexibility to be preserved in subbands where it is most needed.
Solution Approach 2:
Synchronous subband regions act as intermediary buffer zones between asynchronous operator regions. These synchronous subbands mediate the interaction between different operators' asynchronous operations, reducing mixed interference while allowing bandwidth flexibility in the asynchronous regions.
Data Source
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AI summary
Aspects of the present disclosure provide an apparatus and techniques for managing interference across operators. A base station identifies a first region of a first frequency spectrum assigned to a first operator, wherein uplink and downlink subframe configurations for Time Division Duplex (TDD) communications using the first region and a first region of a second frequency spectrum assigned to a second operator are synchronized between the first and second operator. The base station further identifies a second region of the first frequency spectrum, wherein uplink and downlink subframe configurations for TDD communications using the second region and a second region of the second frequency spectrum are not synchronized between the first and second operator. The base station communicates with one or more user equipments using the first and second region of the first frequency spectrum.