IoT Downlink Reserved Resource Bitmaps for Dynamic Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing and utilizing reserved resources, particularly in Internet of Things (IoT) applications, which require advanced methods for configuring and using these resources effectively.
Innovation Solution
The proposed method involves configuring reserved resources hierarchically in a wireless communication system supporting IoT, using downlink control information (DCI) to indicate the use of these resources, and managing them in units of specific resources such as narrowband or NB-IoT carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reserved resources are configured statically in wireless communication systems, then resource management is simple, but resource utilization efficiency is low
Solution Approach 1:
The patent implements dynamic reserved resource configuration by introducing a slot-level bitmap and symbol-level bitmap that can be updated through RRC signaling and DCI. The reserved resources are no longer static but can be dynamically adjusted according to actual network conditions, traffic patterns, and service requirements, thereby improving resource utilization efficiency while maintaining manageable complexity through structured signaling mechanisms.
Solution Approach 2:
The patent changes the parameters of reserved resource configuration by introducing configurable bitmaps (slot-level and symbol-level) that define which time slots and symbols are reserved. These parameters can be modified through RRC signaling for semi-static configuration and DCI for dynamic adjustments, allowing the system to adapt reserved resource patterns to different scenarios without fundamentally changing the resource management architecture.
2Adaptability or versatility
If reserved resources are configured at a fine granularity (symbol level), then resource allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the reserved resource configuration into two hierarchical levels: slot-level bitmap and symbol-level bitmap. The slot-level bitmap provides coarse-grained reservation at the slot level, while the symbol-level bitmap provides fine-grained control within reserved slots. This segmentation allows the system to achieve fine-grained resource allocation flexibility while reducing overall signaling overhead by not requiring full symbol-level configuration for all slots, only for reserved ones.
Solution Approach 2:
The patent implements a nested structure where the symbol-level bitmap is nested within the slot-level bitmap framework. The slot-level bitmap first identifies which slots are reserved, and then the symbol-level bitmap further specifies which symbols within those reserved slots are actually reserved. This nested approach enables fine-grained resource allocation while minimizing signaling overhead by applying detailed symbol-level configuration only where necessary (in reserved slots) rather than across the entire frame structure.
3Productivity
If downlink control information is transmitted frequently to update reserved resource usage, then resource dynamicity is improved, but control channel overhead increases
Solution Approach 1:
The patent implements periodic action by using RRC signaling for semi-static configuration of reserved resources (slot-level and symbol-level bitmaps), which updates less frequently. Meanwhile, DCI is used for more dynamic adjustments when needed. This periodic approach with different update frequencies for different configuration levels allows the system to maintain resource dynamicity while avoiding excessive control channel overhead by not updating all parameters at every scheduling interval.
Solution Approach 2:
The patent applies preliminary action by configuring the reserved resource patterns (slot-level and symbol-level bitmaps) in advance through RRC signaling before actual data transmission. This preliminary configuration establishes the reserved resource framework upfront, allowing subsequent DCI transmissions to only indicate whether to use pre-configured reserved resources rather than fully reconfiguring them each time. This reduces control channel overhead by eliminating redundant configuration signaling.
Data Source
AI summary
A method of transmitting and receiving downlink information in a wireless communication system supporting Internet of Things (IoT) and a device therefor are disclosed. The method performed by a user equipment (UE) comprises receiving, from a base station, discontinuous reception (DRX) related information via radio resource control (RRC) signaling, receiving, from the base station, a paging message based on the DRX related information, receiving, from the base station, configuration information including information for a slot level bitmap related to a reserved resource and information for a symbol level bitmap related to the reserved resource, and receiving, from the base station, downlink control information (DCI) including indication information related to a use of the reserved resource.