Network Node Co-Scheduling UE Interference Management
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Solution Overview
Problem
Current wireless communication systems face challenges in co-scheduling user equipments (UEs) due to the lack of straightforward UE-to-UE measurement for link loss information, particularly in co-frequency/time full duplex operations, where UE-to-UE interference is significant and existing legacy UEs are not configured for direct UE-to-UE measurement.
Innovation Solution
A method and network node configuration that schedules UEs in the same time and frequency resource by determining uplink transmitting power and downlink receiving power values, deriving link loss information based on channel measurements, and establishing a co-scheduling threshold to enable co-scheduling when the link loss meets the threshold condition, thereby managing UE-to-UE interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If co-frequency/time full duplex scheduling is implemented, then spectral efficiency is improved, but UE-to-UE interference increases
Solution Approach 1:
The network node obtains UE-to-UE link loss information through feedback mechanisms (e.g., RSRP measurements reported by UEs or direct UE-to-UE measurements) and uses this feedback to dynamically adjust scheduling decisions, power control parameters, and resource allocation to mitigate interference while maintaining full duplex operation
Solution Approach 2:
The system changes operational parameters such as transmit power levels, scheduling thresholds, and resource allocation patterns based on measured link loss conditions. By adjusting these parameters dynamically according to real-time channel conditions, the system optimizes the balance between spectral efficiency and interference management
2Measurement precision
If direct UE-to-UE measurement is implemented, then link loss information accuracy is improved, but device complexity increases
Solution Approach 1:
The network node acts as an intermediary that facilitates link loss information acquisition. Instead of requiring complex direct UE-to-UE measurement capabilities, the network node uses its existing measurement infrastructure (e.g., measuring RSRP of UL signals from other UEs) to obtain the required link loss information, thereby avoiding increased UE complexity
Solution Approach 2:
Instead of having UEs directly measure and report UE-to-UE link loss (which would increase UE complexity), the system inverts the approach by having the network node perform the measurements using existing downlink measurement capabilities, thus obtaining the same information without adding UE complexity
3Reliability
If full duplex interference cancellation is applied at BS side, then interference cancellation capability is improved, but base station complexity increases
Solution Approach 1:
The system implements partial interference cancellation by using link loss information to make scheduling and power control decisions that reduce UE-to-UE interference, rather than implementing complete sophisticated interference cancellation algorithms. This partial action provides sufficient interference mitigation without the excessive complexity of full duplex cancellation at the BS
Data Source
AI summary
The present invention relates to a method (S100) and wireless communication network node for co-scheduling a first and a second user equipments, UEs. The co-scheduling comprises scheduling the first UE and the second UE in a same time and frequency resource. The method comprises determining if a co-scheduling condition is fulfilled, wherein the co-scheduling threshold value, selecting the first and second UE for co-scheduling when the co-scheduling condition is fulfilled.