Adaptive Time-Varying Frame Pattern for FBE Channel Access
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Solution Overview
Problem
In wireless communication systems, especially in shared spectrum environments, interference occurs between operators using Frame Based Equipment (FBE) due to synchronized or staggered frame periods, leading to collisions or starvation of network access.
Innovation Solution
The solution involves varying the frame period, maximum channel occupancy time (MCOT), minimum idle period (MIP), or their ratio over time to reduce interference and prevent starvation, allowing operators to independently or coordinately determine time-varying frame patterns that differ even without coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If operators use synchronized or staggered frame periods in shared spectrum, then channel access is structured and predictable, but interference and collisions occur between operators
Solution Approach 1:
The patent applies dynamics by making the frame period variable rather than fixed. The base station dynamically adjusts the frame period length based on channel conditions and interference levels, allowing the system to adapt to changing environmental conditions while maintaining structured channel access. This resolves the contradiction by preserving predictability through controlled variation rather than rigid synchronization.
Solution Approach 2:
The patent changes the frame period parameter from a fixed value to a variable parameter that can be adjusted according to channel conditions. By modifying this key temporal parameter, the system maintains structured access patterns while avoiding persistent interference collisions that occur with synchronized fixed frame periods.
2Ease of operation
If operators use fixed frame periods, then channel access is simple and predictable, but starvation occurs when one operator consistently occupies the channel
Solution Approach 1:
The system dynamically adjusts frame period lengths to prevent starvation while maintaining operational simplicity. When one operator dominates channel access, the system extends that operator's frame period, naturally creating opportunities for other operators to access the channel without complex coordination mechanisms.
Solution Approach 2:
The base station monitors channel occupancy patterns and uses this feedback to adjust frame period allocations. When starvation is detected for any operator, the system responds by modifying frame parameters to ensure fairer access, thereby maintaining reliability while preserving the simplicity of fixed-frame structures.
3Object-affected harmful factors
If frame period is extended to reduce interference, then collision probability decreases, but channel access latency increases
Solution Approach 1:
The system dynamically changes the frame period parameter based on real-time channel conditions. When collisions are detected or predicted, the frame period is extended to reduce collision probability. When channel conditions are favorable, the frame period is shortened to minimize access latency, thus balancing both objectives through adaptive parameter adjustment.
Data Source
AI summary
Wireless communications systems and methods related to communications in a network are provided. A first wireless communication device may communicate to a second wireless communication device, a modification to a time parameter associated with at least one of a minimum idle period (MIP) of a frame period or a maximum channel occupancy time (MCOT) of the frame period. Additionally, the first wireless communication device may communicate with the second wireless communication device, a communication signal during the frame period based on the modification to the time parameter.