Configurable TDD Frame Structure for NB-IoT Hopping Superframes
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Solution Overview
Problem
Current narrowband Internet of Things (NB-IOT) networks face challenges in efficiently managing dynamic time division duplex (TDD) frame structures, particularly in optimizing resource allocation and duty cycles for NB-IOT networks, which affects communication efficiency and capacity utilization.
Innovation Solution
A configurable TDD frame structure is introduced, featuring an anchor segment on anchor hopping frequencies and a data segment on non-anchor hopping frequencies, with a configurable portion between downlink and uplink portions that can include either downlink or uplink information, allowing dynamic configuration to optimize resource allocation and duty cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed TDD frame structure is used, then system complexity is reduced, but communication efficiency and capacity utilization deteriorate due to inability to adapt to varying traffic demands
Solution Approach 1:
The patent implements dynamic TDD frame structure where the configurable portion can be flexibly adjusted between downlink and uplink based on real-time traffic demands. This dynamic reconfiguration allows the system to adapt to varying communication patterns while maintaining manageable complexity through structured design elements like anchor segments and predefined hopping frequencies.
Solution Approach 2:
The TDD frame structure is divided into distinct segments: anchor segment with anchor hopping frequencies, data segment with non-anchor hopping frequencies, configurable portion, downlink portion, and uplink portion. This segmentation allows independent optimization of each segment while maintaining overall system coherence, resolving the contradiction between adaptability and complexity.
2Productivity
If resource allocation is optimized for specific traffic patterns, then communication efficiency improves, but adaptability to different traffic demands deteriorates
Solution Approach 1:
The configurable portion of the frame structure can be dynamically reconfigured to include downlink information, uplink information, or both, depending on traffic demands. This dynamic capability enables the system to optimize capacity utilization for current traffic patterns while maintaining adaptability to future demand changes through the same reconfigurable mechanism.
Solution Approach 2:
The configurable portion serves multiple functions: it can be allocated to downlink traffic, uplink traffic, or remain flexible for future allocations. This multi-functionality allows the system to optimize for different traffic patterns using the same structural element, simultaneously achieving high capacity utilization and broad adaptability.
3Use of energy by moving object
If duty cycles are strictly regulated, then energy consumption is controlled, but communication efficiency deteriorates due to limited transmission opportunities
Solution Approach 1:
The system dynamically adjusts the configurable portion allocation within the constraints of regulated duty cycles. By flexibly assigning resources to downlink or uplink based on actual traffic needs while adhering to duty cycle limits, the system maximizes communication efficiency within energy constraints, rather than being rigidly limited by fixed allocations.
Data Source
AI summary
Aspects of the disclosure relate to a dynamic, configurable time division duplex (TDD) frame structure for hopping superframes utilized in narrowband Internet of Things (NB-IOT) wireless communication systems. The configurable frame structure includes an anchor segment residing on a plurality of anchor hopping frequencies and a data segment residing on one of a plurality of non-anchor hopping frequencies. The data segment includes a downlink portion, an uplink portion, and a configurable portion between the downlink control portion and the uplink control portion that may be configured to include at least one of downlink information or uplink information.