LSA Controller Adaptive Interference Discovery
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Solution Overview
Problem
In licensed shared access (LSA) systems, traditional methods for determining interference and managing spectrum resource allocation are inaccurate and fail to adapt to changes in the radio environment, leading to potential interference with licensed systems and inefficient resource utilization.
Innovation Solution
An adaptive interference discovery method where an LSA controller selects a measurement node to assess whether an LSA secondary user device causes interference to the LSA licensed system, allowing for timely spectrum resource reconfiguration based on measured interference levels, thereby preventing interference and optimizing resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If theoretical calculation is used to determine maximum transmitting power limitation of LSA secondary user device, then resource allocation can be performed, but measurement precision and reliability of interference determination deteriorate due to propagation model deviations and environmental changes
Solution Approach 1:
The patent implements a feedback mechanism where the LSA secondary user device measures actual interference levels on the LSA spectrum resource and reports these measurements to the LSA controller. The LSA controller then adjusts transmitting power limitations based on this real-world feedback, creating a closed-loop system that continuously optimizes resource allocation while maintaining interference protection accuracy despite environmental variations.
2Reliability
If fixed spectrum allocation is used for LSA licensed system, then licensed system can maintain stable operation, but spectrum resource utilization efficiency deteriorates due to underutilization when licensed system does not occupy resources continuously
Solution Approach 1:
The patent introduces dynamic spectrum sharing where the LSA secondary user device can conditionally access the LSA spectrum resource based on real-time interference measurements. The system transitions from static fixed allocation to dynamic allocation, allowing the secondary device to utilize the spectrum when the licensed system is not actively transmitting, thereby improving overall resource utilization while maintaining licensed system stability through measured interference protection.
3Reliability
If LSA secondary system uses conditional usage rights for LSA spectrum resource, then licensed system ownership is protected, but interference protection capability deteriorates when propagation environment changes cause unexpected interference
Solution Approach 1:
The patent implements real-time interference measurement and reporting where the LSA secondary user device continuously monitors the actual interference it causes to the LSA licensed system on the shared spectrum resource. This feedback mechanism enables the system to adapt to propagation environment changes dynamically, maintaining interference protection capability despite environmental variations while preserving licensed system ownership rights.
Solution Approach 2:
The LSA secondary user device performs self-measurement of interference levels it generates on the shared spectrum resource and autonomously reports these measurements to the LSA controller. This self-service approach enables the secondary device to monitor and manage its own interference impact, allowing the system to adapt to environmental changes while maintaining protection for the licensed system without requiring continuous external intervention.
Data Source
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AI summary
The document discloses a method and apparatus for adaptive interference discovery of a licensed shared access (LSA) system. The method includes: an LSA controller selects a measurement node according to interference protection information of an LSA licensed system; the LSA controller sends a measurement configuration message to the measurement node; and the LSA controller receives a measurement response message returned by the measurement node and determines whether to perform LSA spectrum resource reconfiguration according to the measurement response message.