NR PDCCH Resource Allocation in LTE-NR DSS
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Solution Overview
Problem
The current dynamic spectrum sharing technology between LTE and NR restricts the allocation of NR PDCCH resources due to the presence of LTE CRS transmission, limiting the operational capacity of the NR control channel during DSS operations.
Innovation Solution
A resource control apparatus and method that allocates specific symbols within an LTE subframe for NR PDCCH by performing puncturing processing on the LTE CRS transmission location, allowing coexistence and enhancing NR PDCCH capacity by increasing or saving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If NR PDCCH is allocated in symbols with LTE CRS transmission during DSS operation, then NR PDCCH capacity is improved, but interference between LTE CRS and NR PDCCH increases
Solution Approach 1:
The patent introduces rate matching as an intermediary mechanism that coordinates between LTE CRS transmission and NR PDCCH allocation. The NR PDCCH resources are rate-matched around the LTE CRS positions, allowing both signals to coexist in the same time-frequency resources without direct interference, thus enabling NR PDCCH capacity improvement while maintaining LTE CRS functionality
Solution Approach 2:
The patent implements dynamic resource allocation where the NR PDCCH can flexibly utilize symbols that contain LTE CRS based on channel conditions and traffic requirements. The system dynamically adjusts the allocation of NR PDCCH resources in symbols with LTE CRS transmission, enabling adaptive optimization of NR control channel capacity while managing interference through dynamic rate matching parameters
2Reliability
If NR PDCCH is restricted from symbols with LTE CRS transmission, then interference is avoided, but NR PDCCH operational capacity deteriorates
Solution Approach 1:
The patent merges the resource allocation of LTE CRS and NR PDCCH in the same time-frequency grid by implementing rate matching. Instead of separating these resources, the system combines their allocation in a coordinated manner where NR PDCCH resources are explicitly rate-matched around LTE CRS positions, allowing both systems to share the spectrum efficiently during DSS operation while maintaining各自的 reliability requirements
Solution Approach 2:
The patent changes the resource allocation parameters of NR PDCCH based on the presence of LTE CRS. By adjusting the rate matching parameters and resource allocation patterns dynamically, the system enables NR PDCCH to operate in symbols with LTE CRS transmission under controlled conditions, thereby improving NR PDCCH capacity while maintaining LTE CRS transmission reliability through parameter optimization
Data Source
AI summary
The present disclosure proposes a new scheme of resource control technology which allows optimal operation by enhancing the capacity of a control channel of NR. specifically, an NR PDCCH. during a DSS operation in which LTE/NR dynamically shares a frequency is proposed.