LTE-NR Spectrum Sharing RBG Allocation Strategy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current resource allocation methods, such as Resource Allocation Type 0, lead to inefficiencies when spectrum is shared between LTE and NR, resulting in unutilized resources and suboptimal user and cell throughput due to differences in RB size and number between the two technologies, especially when sharing the same frequency carrier.
Innovation Solution
A method where a network node evaluates and selects an allocation strategy for Resource Block Groups (RBGs) between LTE and NR by computing differences in requested and allocated RBs, optimizing the allocation to minimize over or under utilization, and reusing Resource Allocation Type 0 to ensure fair resource distribution based on the needs of each technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If Resource Allocation Type 0 is used for spectrum sharing between LTE and NR, then allocation simplicity is maintained, but resource utilization efficiency deteriorates due to RB size and number differences between the two technologies
Solution Approach 1:
The patent applies local quality by determining different starting points for RBG allocation based on the specific RAT type (LTE or NR). The network node identifies whether LTE or NR has more requested RBs and allocates RBGs starting from different positions in the frequency domain accordingly. This localized adaptation of allocation strategy optimizes resource utilization for each RAT's specific requirements while maintaining the simplicity of Type 0 allocation.
2Ease of operation
If fixed RBG allocation is used for both LTE and NR, then allocation process simplicity is maintained, but throughput performance deteriorates due to unutilized resources
Solution Approach 1:
The patent implements dynamics by making the RBG allocation starting point variable rather than fixed. The network node dynamically determines the starting point based on real-time conditions - specifically which RAT (LTE or NR) requests more RBs. This dynamic adjustment allows the system to adapt to changing traffic demands and resource requirements, maximizing throughput performance while keeping the allocation process relatively simple.
3Productivity
If spectrum is shared between LTE and NR on the same frequency carrier, then spectrum efficiency is improved, but resource distribution fairness deteriorates due to differences in RB characteristics
Solution Approach 1:
The patent applies parameter changes by modifying the allocation starting point parameter based on the specific needs of each RAT. When LTE requests more RBs, allocation starts from the LTE perspective; when NR requests more RBs, allocation starts from the NR perspective. This parameter adjustment ensures fair resource distribution by giving priority to the RAT with higher demand, while maintaining efficient spectrum sharing between the two technologies.
Data Source
AI summary
An allocation strategy allocating Resource Block Groups (RBGs) on a frequency carrier to a first Radio Access technology (RAT) and a second RAT for radio communication with a User Equipment (UE), is provided. A first allocation strategy is evaluated by allocating with start from the decided first RAT starting point, a first number of RBGs to the first RAT. The second RAT is allocated a second number of RBGs by use of the RBs that remains on the carrier after occupation of the first number of RBGs. A first difference is computed between the number of RBs requested for the first RAT and a first number of RBs comprised in the first number of RBGs allocated to the first RAT, and further computes a second difference between the number of RBs requested for the second RAT and a second number of RBs as comprised in the second number of RBGs.