Mobile-guided uplink interference management
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Solution Overview
Problem
Current 3GPP LTE systems face challenges in managing mobile uplink interference as existing methods like IOI and HII do not identify specific mobile devices causing interference, leading to proactive measures that limit uplink data transmission for all in-cell mobiles, which is not efficient.
Innovation Solution
Mobile electronic devices detect downlink interference and alert base stations, providing preferred radio resource indications to avoid interference by prescribing specific radio resource sets for both uplink and downlink transmissions, allowing neighboring base stations to adjust their resource usage accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If proactive measures are taken to limit uplink data transmission of all in-cell mobiles, then uplink interference to other cells is reduced, but network throughput and resource utilization deteriorate
Solution Approach 1:
The mobile device autonomously detects downlink interference from neighboring base stations and self-identifies as a potential uplink interference source, then self-regulates its uplink transmission by selecting alternative radio resources without requiring network control signaling. This self-service mechanism eliminates the need for conservative network-wide restrictions while maintaining interference mitigation.
Solution Approach 2:
The mobile device monitors downlink interference conditions and uses this feedback to dynamically adjust its uplink radio resource selection. By continuously detecting interference levels and adapting resource choices based on real-time conditions, the system achieves precise interference control without blanket restrictions on all mobiles.
2Reliability
If conservative interference management is implemented by restricting all mobiles, then interference coordination between cells is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The mobile device independently performs interference detection and resource selection without requiring complex network signaling or coordination protocols. The device autonomously monitors downlink interference, identifies suitable uplink resources, and executes transmission decisions locally, eliminating the need for extensive signaling overhead.
Solution Approach 2:
The interference management function is extracted from the network control plane and relocated to the mobile device. By moving the detection and decision-making capabilities to the user equipment, the system eliminates the need for complex network-side coordination mechanisms and reduces signaling requirements.
3Productivity
If specific mobiles causing interference are identified, then resource allocation efficiency is improved, but measurement precision and detection capability must increase
Solution Approach 1:
Instead of having the network identify interfering mobiles through complex measurements, the invention inverts the approach by enabling mobiles to self-identify as interference sources based on their own downlink interference observations. This reversal simplifies the detection mechanism while maintaining precise identification of affected devices.
Solution Approach 2:
The mobile device autonomously determines its own interference-causing potential by monitoring downlink conditions, eliminating the need for network-side measurement and identification mechanisms. This self-identification approach achieves precise targeting of affected mobiles without increasing measurement complexity.
Data Source
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AI summary
Systems and methods can be implemented on a user device and eNBs to manage uplink interference. A user device associated with a serving base station may detect downlink interference from one or more interfering base stations that are different from the serving base station. The user device that detects downlink interference can determine an uplink radio resource set from a plurality of predefined uplink radio resource sets based, at least in part, on the detected downlink interference. The user device can then transmit to the serving base station a radio resource indication identifying the determined uplink radio resource set to facilitate uplink interference management.