Probe UE Interference Measurement for Dynamic TDD Networks
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Solution Overview
Problem
Existing wireless networks face interference issues due to mismatched TDD configurations in RF footprints, which can originate from neighboring networks or internal sources, particularly in CBRS networks, leading to potential interference during peak usage hours and varying network activities.
Innovation Solution
A probe device is deployed in an enterprise network to measure TDD interference by receiving wireless channels, scanning frequencies, and determining neighboring network configurations using System Information Blocks, UL SINR, DL SINR, and UL RSSI measurements, reporting data to the enterprise network for interference mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TDD configurations are used in wireless networks, then communication capacity and flexibility are improved, but interference occurs due to mismatched configurations in neighboring networks
Solution Approach 1:
The system implements feedback mechanisms where user equipment measures interference levels and reports them to the network. The network then adjusts TDD configurations based on this feedback to minimize interference while maintaining communication capacity. This closed-loop control allows the system to adapt to changing interference conditions dynamically.
Solution Approach 2:
The system changes TDD configuration parameters (such as uplink-downlink slot patterns) to optimize performance. By adjusting these parameters based on measured interference conditions, the system can maintain high communication capacity while avoiding interference from mismatched configurations in neighboring networks.
2Reliability
If interference measurement and detection mechanisms are implemented, then interference mitigation capability is improved, but device complexity and measurement requirements increase
Solution Approach 1:
User equipment performs self-measurement of interference levels using its own receiver capabilities. The device autonomously measures uplink interference during downlink slots and downlink interference during uplink slots, then reports these measurements to the network without requiring additional external measurement equipment, thereby reducing overall system complexity.
Solution Approach 2:
The user equipment is designed to perform multiple functions: normal communication, interference measurement, and configuration reporting. By making the UE multi-functional, the system avoids adding separate dedicated measurement devices, thus improving interference mitigation capability while limiting the increase in device complexity.
3Object-affected harmful factors
If dynamic TDD configuration adjustment is performed, then interference mitigation is improved, but network coordination and configuration management complexity increase
Solution Approach 1:
The network receives interference measurements from user equipment and uses this feedback to dynamically adjust TDD configurations. This feedback-driven approach enables effective interference mitigation while keeping configuration management systematic and manageable through automated decision-making algorithms in the network controller.
Solution Approach 2:
The system implements dynamic TDD configuration adjustment where uplink-downlink slot patterns can change over time based on interference conditions. This dynamic adaptation allows the network to respond to changing interference environments while maintaining manageable complexity through predefined adjustment rules and algorithms.
Data Source
AI summary
A probe device and method for measuring TDD interference from neighboring networks in an Enterprise Network (EN). The probe device is situated on a campus of an EN in a position for measuring TDD interference between a neighboring wireless network. The probe device measures TDD interference data and provides it to an Enterprise Network and Orchestrator, which determines the TDD configuration used by neighboring networks, and can take action to mitigate or resolve interference effects from neighboring networks. The probe UE has a TDD measurement unit that may include an SIB Measurement unit for receiving broadcast SIBs signals from neighboring networks, a UL SINR Measurement Unit, a DL SINR Measurement Unit, and a UL RSSI Measurement Unit. The probe device may be positioned in a fixed location in an Enterprise Network campus, and connected to an external power supply.