Inter-RAT Coordination for Shared Medium Power Savings
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Solution Overview
Problem
In wireless communication systems, the shared use of unlicensed frequency bands by small cell WWAN operations can lead to inter-Radio Access Technology (RAT) conflicts and inefficiencies, particularly in managing wakeup schedules and access to communication media, resulting in potential power wastage and latency issues.
Innovation Solution
Implementing an inter-RAT coordination mechanism that generates activity indicators to disable conflicting measurements and priority indicators to manage access, allowing for the timely release of backhaul connections, thereby optimizing power usage and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple RATs perform measurements on shared communication medium according to their wakeup schedules, then measurement coverage is improved, but power consumption increases and conflicts occur
Solution Approach 1:
The system implements feedback by monitoring wakeup schedules of multiple RATs and adjusting measurement configurations based on detected conflicts. The network entity receives wakeup schedule information from multiple RATs, identifies overlapping measurement times, and sends configuration updates to resolve conflicts, creating a closed-loop system that adapts to scheduling conditions.
Solution Approach 2:
The system performs preliminary action by proactively configuring measurement opportunities before conflicts occur. The network entity receives and analyzes wakeup schedules in advance, identifies potential measurement conflicts, and pre-adjusts measurement configurations to avoid overlapping operations, preventing power waste before it happens.
2Adaptability or versatility
If multiple RATs access shared communication medium independently, then RAT autonomy is maintained, but inter-RAT conflicts and medium access inefficiency occur
Solution Approach 1:
The network entity acts as an intermediary that coordinates between multiple RATs. It receives wakeup schedule information from different RATs, processes this information centrally, and sends coordinated configuration commands back to each RAT. This intermediary approach maintains RAT autonomy while enabling centralized conflict resolution and improved medium access efficiency.
3Measurement precision
If measurement opportunities are increased for better coverage, then measurement accuracy improves, but latency and power waste increase due to conflicts
Solution Approach 1:
The system applies partial action by selectively enabling measurement opportunities only when conflicts are avoided. Instead of disabling all measurements or running them all independently, the system identifies non-conflicting measurement windows and enables measurements only during these optimized time slots, achieving sufficient measurement accuracy without the time waste of redundant conflicting measurements.
Data Source
AI summary
Techniques for co-existence on a shared communication medium are disclosed. An activation command may be received, over a backhaul connection and via a first Radio Access Technology (RAT), configuring the first RAT for active operation on a shared communication medium. An activity indicator may be generated based on the active operation of the first RAT. Based on the activity indicator, one or more measurements scheduled to be performed on the communication medium in accordance with a second RAT and a corresponding wakeup schedule may be disabled. Access of a first RAT to a shared communication medium may also be monitored. A priority indicator for the first RAT may be generated based on the monitored access. Based on the priority indicator, release of a backhaul connection on the communication medium that is associated with a second RAT may be coordinated.