Dynamic Spectrum Sharing Bandwidth Part Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in dynamic spectrum sharing between LTE and NR, leading to suboptimal throughput and increased latency due to complex frequency spectrum reuse and fallback operations.
Innovation Solution
The system configures a frequency spectrum with dedicated and dynamically shared bandwidth parts based on user equipment (UE) rate matching capabilities and mobility conditions, allowing for dual registration and single control channel scheduling to optimize resource allocation and reduce handover frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency spectrum is reused between LTE and NR for dynamic spectrum sharing, then spectrum usage efficiency is improved, but system complexity increases and throughput becomes nonoptimal
Solution Approach 1:
The frequency spectrum is segmented into multiple bandwidth parts (BWPs), where each BWP is dedicated to a specific radio protocol (LTE or NR). The network configures a set of BWPs for a UE, with each BWP associated with a specific RAT, thereby avoiding the complexity of dynamic spectrum sharing while maintaining efficient spectrum usage through dedicated allocations.
Solution Approach 2:
Different bandwidth parts are assigned different quality characteristics based on the UE's rate matching capability. UEs capable of rate matching are assigned BWPs that allow dynamic spectrum sharing, while UEs without this capability are assigned dedicated BWPs for a single RAT, optimizing performance for each UE's specific capabilities.
2Reliability
If fallback operations are implemented from NR to LTE in dynamically shared spectrum, then connectivity reliability is improved, but communication latency increases significantly
Solution Approach 1:
The network performs preliminary assessment of the UE's rate matching capability before assigning bandwidth parts. By determining whether a UE supports rate matching in advance, the network can proactively assign the most appropriate BWP configuration, preventing the need for fallback operations and reducing associated latency.
Solution Approach 2:
The system dynamically selects the appropriate BWP configuration based on real-time UE capabilities and network conditions. The network can switch between different BWP assignments depending on whether the UE supports rate matching, enabling adaptive optimization of both reliability and latency without requiring fallback operations.
3Adaptability or versatility
If multiple bandwidth parts are configured for different radio protocols, then adaptability to UE capabilities is improved, but control overhead increases
Solution Approach 1:
A single control mechanism is designed to manage multiple bandwidth parts for different radio protocols. The network uses a unified BWP configuration approach that can handle both LTE and NR BWPs through the same control procedures, reducing control overhead while maintaining the ability to adapt to different UE capabilities.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support dynamic spectrum sharing for multiple radio protocols, such as New Radio and Long Term Evolution. Systems may implement a number of techniques to improve spectrum use by user equipment in dynamically shared frequency spectrums. In some aspects, the network may assign a user equipment to a specific bandwidth part based on a rate matching capability of the user equipment. Additionally or alternatively, the network may activate a specific bandwidth part based on the frequency of handover for a user equipment. In some aspects, the network may support dual registration (e.g., registration in a same frequency spectrum using different radio protocols) for a user equipment operating on a dynamically shared spectrum. To reduce the control overhead for such a user equipment, the network may use a single control channel to schedule data for multiple radio protocols.