Base Station Interference Indication for Flexible Half-Duplex TDD
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Solution Overview
Problem
In TDD systems, cross-timeslot interference between neighboring cells reduces system capacity and can lead to call drops and blocking, as existing solutions either require significant control information overhead or fail to adequately locate interference in the frequency and time domains.
Innovation Solution
A method and apparatus for a base station to detect interference from neighboring cells and send interference indication information, including frequency resource, subframe, and physical resource block details, to facilitate interference suppression in flexible half-duplex mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flexible half-duplex technology is used to dynamically adjust uplink-downlink resource allocation, then spectrum efficiency is improved, but cross-timeslot interference increases between neighboring cells
Solution Approach 1:
The patent implements a feedback mechanism where base stations detect interference from neighboring cells and send interference indication information containing frequency resource, subframe, and PRB details. The neighboring base station uses this feedback to adjust its resource allocation and suppress interference, thereby maintaining spectrum efficiency while reducing harmful cross-timeslot interference
Solution Approach 2:
The patent dynamically changes resource allocation parameters (frequency resources, subframes, PRBs) based on detected interference conditions. By adjusting which time-frequency resources are allocated for uplink or downlink in each cell based on real-time interference status, the system maintains flexible half-duplex operation while mitigating interference
2Object-affected harmful factors
If existing interference coordination methods are used, then some interference control is achieved, but control information overhead becomes too large
Solution Approach 1:
The patent extracts only the essential interference indication information needed for interference suppression - specifically frequency resource, subframe, and PRB identification - and transmits this extracted information between base stations. This selective extraction of critical parameters achieves effective interference control while minimizing control information overhead by excluding unnecessary data
3Object-affected harmful factors
If existing interference coordination methods are used, then some interference control is achieved, but sufficient details to locate interference in frequency and time domains are not provided
Solution Approach 1:
The patent segments the interference indication information into three precise components: frequency resource identification, subframe identification, and physical resource block (PRB) identification. This segmentation allows the receiving base station to precisely locate interference in both frequency and time domains, enabling targeted interference suppression while maintaining clear and structured information transmission
Data Source
Figure 1~3
AI summary
Embodiments of the present invention provide an interference indication method and apparatus. After detecting interference from a neighboring cell, a base station sends interference indication information to the neighboring cell, where the interference indication information includes at least indication information of a frequency resource that receives the interference from the neighboring cell and that is configured to be in a flexible half-duplex mode, so as to indicate that the interference from the neighboring cell is interference on the frequency resource configured to be in the flexible half-duplex mode. In this way, in an application scenario of a flexible half-duplex technology, a base station can learn of a status of interference from a neighboring cell, so as to use a corresponding interference suppression mechanism.