Narrowband IoT Scheduling Request via Dedicated Periodical Resources
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Solution Overview
Problem
Narrowband IoT systems face inefficiencies in reporting scheduling requests due to limited system resources and difficulty in supporting both idle-state and connected-state UEs, leading to reduced resource utilization and increased interference.
Innovation Solution
A method and device for reporting scheduling requests using dedicated periodical physical resources, including time, frequency, and sequence resources, allowing for contention-free random access and improved preamble sequence capacity, reducing inter-cell interference through orthogonal scrambling and enhanced NPRACH configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dedicated periodical physical resources are allocated for scheduling request reporting, then resource utilization improves and interference reduces, but system complexity and resource overhead increase
Solution Approach 1:
The patent segments the scheduling request reporting resources into dedicated periodical physical resources, separating them from other uplink resources. This segmentation allows for specialized optimization of scheduling request reporting while maintaining overall system organization through structured resource allocation.
Solution Approach 2:
The dedicated periodical physical resources serve multiple functions: they support both idle-state and connected-state UEs, provide contention-free random access capability, and enable efficient scheduling request reporting. This multi-functionality resolves the contradiction by making the same resource structure serve diverse purposes.
2Productivity
If contention-free random access is implemented with dedicated physical resources, then scheduling request reporting efficiency improves, but resource overhead and system complexity increase
Solution Approach 1:
The patent implements periodic physical resources for scheduling request reporting, where resources are allocated at regular intervals rather than continuously. This periodic allocation reduces resource overhead by making resources available only when needed, while still providing dedicated access for scheduling requests during those periods.
3Object-affected harmful factors
If orthogonal scrambling is used to reduce inter-cell interference, then interference reduction improves, but processing complexity and computational overhead increase
Solution Approach 1:
The patent applies orthogonal scrambling by changing the parameter of the physical resource representation through orthogonal codes. This parameter change enables interference reduction through mathematical orthogonality properties, where the scrambling codes are designed to be orthogonal to each other, naturally reducing inter-cell interference without requiring complex adaptive processing.
Data Source
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AI summary
A method and device for reporting scheduling request are provided. The method includes the operations of acquiring a dedicated physical resource of a random access channel (RACH) configured to report a scheduling request, when the scheduling request is triggered, transmitting the RACH on the dedicated physical resource. The dedicated physical resource includes a plurality of periodic physical resources. Through this dedicated physical resource, the user equipment (UE) can report scheduling request in a contention-free random access way, and the capacity of a preamble sequence is improved and inter-cell interference is reduced.