Interference Control in Shared Spectrum via UE Signaling
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Solution Overview
Problem
Current radio communication systems face challenges in balancing high robustness at high traffic loads with high spectrum efficiency at low traffic loads, as existing methods either prioritize dedicated spectrum use or flexible spectrum sharing, but not both effectively, leading to unpredictable interference and inefficient spectrum utilization.
Innovation Solution
A method that allows multiple operators to share the same radio spectrum while maintaining controlled interference, prioritizing one system over the other to ensure high-quality communication, by using signaling between user equipment and network nodes to adjust transmission power and schedule based on interference potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated spectrum is assigned to each operator for exclusive usage, then interference control and communication reliability are improved, but spectrum utilization efficiency deteriorates due to spectrum fragmentation
Solution Approach 1:
The patent merges previously dedicated spectrum resources into shared spectrum resources, allowing multiple operators to simultaneously access the same frequency band. This is achieved through introducing a sharing priority parameter that enables coexistence of different operators' transmissions in the same spectrum, thereby improving overall spectrum utilization while maintaining acceptable interference control through priority-based access mechanisms.
Solution Approach 2:
The patent introduces dynamic priority parameters that can be adjusted based on traffic conditions, channel quality, and service requirements. This dynamic mechanism allows the system to adaptively allocate spectrum access rights, transitioning from static dedicated assignment to flexible shared access, thereby resolving the contradiction between reliable interference control and efficient spectrum utilization.
2Productivity
If unlicensed spectrum is shared by multiple operators, then spectrum utilization efficiency is improved, but interference control and communication reliability deteriorate due to unpredictable interference
Solution Approach 1:
The patent applies different quality levels of interference control to different operators sharing the same spectrum. By introducing priority parameters, the system provides enhanced protection (higher quality) to high-priority operators while allowing more flexible access (lower quality control) for low-priority operators, thereby achieving both efficient spectrum sharing and acceptable interference control through differentiated service levels.
Solution Approach 2:
The patent introduces priority parameters as an intermediary mechanism that mediates between multiple operators' access requests to shared spectrum resources. This intermediary layer enables coordinated access by evaluating traffic conditions, channel quality, and service requirements, thereby maintaining interference control reliability while enabling efficient multi-operator spectrum sharing.
3Adaptability or versatility
If spectrum is dynamically shared between operators, then adaptability to varying traffic conditions is improved, but interference unpredictability increases
Solution Approach 1:
The patent implements feedback mechanisms where operators report channel quality, traffic conditions, and interference levels to the network. Based on this feedback, the system dynamically adjusts priority parameters and spectrum allocation decisions, thereby maintaining adaptability to varying conditions while reducing interference unpredictability through informed, data-driven access control.
Solution Approach 2:
The patent performs preliminary evaluation of traffic conditions, channel quality, and service requirements before granting spectrum access. By assessing these factors in advance and setting appropriate priority parameters, the system enables flexible spectrum sharing while minimizing unpredictable interference through proactive, informed allocation decisions.
Data Source
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AI summary
A first User Equipment (UE) 112, a second UE 122, a first Radio Network Node (RNN) 114, and methods therein for controlling interference between transmissions in a first system 110 and transmissions in a second system 120. The first system comprises the first UE and the first RNN serving the first UE. The second system 120 comprises the second UE and a second RNN 124 serving the second UE. The first system has a first priority in a first part of a shared spectrum and the second system has a second priority in the first part of the shared spectrum, wherein the first priority is higher than the second priority. The method in the first UE comprises transmitting a signal S21 to a second RNN that is to perform a downlink transmission S22 to the second UE, which signal S21 is configured to control the transmission of the second RNN.