Timer-Based TDD Pattern Switching for Interference Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in managing cross-border interference and optimizing time domain patterns to enhance communication quality and reduce latency, particularly in scenarios where asynchronous operations or non-cooperative cells lead to increased interference and reduced throughput.
Innovation Solution
Implementing a method where user equipment (UE) and base stations switch between different time division duplex (TDD) patterns based on timers, allowing for opportunistic conversion of slots or symbols, and utilizing sub-band full duplex (SBFD) modes to reduce interference and improve communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single TDD pattern is used for time division duplex communication, then the system configuration is simple and stable, but cross-border interference increases and communication quality deteriorates in asynchronous operations
Solution Approach 1:
The patent implements dynamic TDD pattern switching where the system transitions from a static single pattern to multiple configurable patterns. The base station and UE switch between different TDD patterns (e.g., pattern 0, pattern 1, pattern 2) based on traffic conditions and interference scenarios, allowing flexible adaptation of uplink-downlink slot configurations to minimize cross-border interference while managing complexity through standardized pattern definitions
Solution Approach 2:
The system changes TDD configuration parameters by selecting from multiple predefined patterns with different uplink-downlink slot distributions. Each pattern represents a different parameter configuration of time resources, enabling the system to adjust time domain characteristics dynamically without changing the fundamental TDD structure, thus reducing interference through parameter optimization
2Reliability
If time domain patterns are switched frequently to optimize communication quality, then communication quality improves and latency decreases, but network overhead increases
Solution Approach 1:
The patent implements periodic TDD pattern switching based on timers rather than continuous switching. The system activates a TDD pattern and waits for a timer to expire before switching to the next pattern, creating periodic transitions that reduce signaling overhead compared to event-triggered or continuous switching mechanisms. This periodic approach maintains communication quality through timely adjustments while minimizing network overhead by avoiding excessive switching events
Solution Approach 2:
The system uses autonomous timer-based switching at the UE and base station without requiring continuous network coordination for each pattern transition. Once the base station configures multiple TDD patterns and associated timers, the UE independently switches patterns based on timer expiration, eliminating the need for frequent network commands and reducing signaling overhead while maintaining synchronized operation
3Loss of time
If timer-based switching between TDD patterns is implemented, then latency is reduced and communication efficiency improves, but system complexity increases
Solution Approach 1:
The base station pre-configures multiple TDD patterns and associated timer values before actual communication begins. This preliminary configuration allows the UE to immediately switch between patterns using pre-defined timer values without requiring real-time negotiation or calculation, reducing switching latency while managing complexity through advance setup of standardized parameters
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of at least two time division duplex (TDD) patterns. The UE may communicate based at least in part on a first pattern of the at least two TDD patterns. The UE may communicate based at least in part on a second pattern of the at least two TDD patterns, based at least in part on a timer, associated with the first pattern, expiring. In some aspects, the UE may further communicate based at least in part on a third pattern of the at least two TDD patterns. The UE may use the third pattern before the timer associated with the first pattern expires or based at least in part on expiry of an additional timer associated with the second pattern. Numerous other aspects are described.