LTE-U Resource Sets for Shared Spectrum Interference
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Solution Overview
Problem
LTE-U networks face challenges in managing interference and optimizing resource allocation in shared spectrum environments, particularly due to varying data service types and lack of synchronization among base stations, which affects Quality of Service (QoS) and communication efficiency.
Innovation Solution
The implementation of a resource allocation pattern that groups communication time resources into distinct resource sets based on different data service sets, with synchronized communication time resources and tailored Listen Before Talk (LBT) parameters for each set, allowing for efficient data transmission and channel state information reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If LTE-U base stations operate in shared spectrum without synchronized resource allocation, then device complexity and ease of operation are improved, but interference management and QoS deteriorate
Solution Approach 1:
The patent segments the shared spectrum resources into distinct resource sets, each dedicated to specific data service types (e.g., eMBB, URLLC, MTC). This segmentation allows different services to operate in dedicated time-frequency resources, reducing mutual interference while maintaining ease of operation through structured resource management.
Solution Approach 2:
The patent implements periodic resource allocation patterns where base stations synchronize their transmissions according to predetermined periodic intervals. This periodic action creates predictable transmission patterns that reduce random interference and improve QoS through consistent resource availability.
2Device complexity
If resource allocation is centralized without service-type differentiation, then device complexity is reduced, but QoS and communication efficiency for diverse data services deteriorate
Solution Approach 1:
The patent applies local quality by tailoring resource allocation parameters specifically to each data service type's requirements. Different resource sets are optimized for different services (e.g., low-latency resources for URLLC, high-throughput resources for eMBB), improving communication efficiency without significantly increasing overall system complexity through standardized management procedures.
3Adaptability or versatility
If base stations use unsynchronized communication time resources, then adaptability to different service types is improved, but frequency reuse and interference management deteriorate
Solution Approach 1:
The patent implements dynamic resource allocation where base stations can adaptively select from predefined resource sets based on real-time service requirements. This dynamic approach maintains adaptability to different service types while ensuring synchronized transmission patterns that improve frequency reuse through coordinated resource utilization across the network.
Data Source
AI summary
Methods, systems, and devices are described for wireless communications. The described techniques include separation of communication resources into resource sets based on data service sets for multiple base stations operating over a carrier of a shared spectrum. The base stations may use synchronized communication time resources. Each data service set may include one or more QoS types and/or communication services. Listen before talk (LBT) parameters for contention procedures performed in different resource sets may be different. A UE configured for communication over the carrier may employ a resource set based discontinuous reception (DRX) mode where a sleep mode is entered for resource sets not associated with active communications by the UE. Channel state information (CSI) reporting may be separated by resource sets for the carrier.