Dynamic LBE Resource Allocation in FBE Networks
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Solution Overview
Problem
Frame-based equipment (FBE) networks face inefficiencies in resource utilization due to fixed channel occupancy times, leading to unused resources and increased latency, especially when high-priority data collisions occur, as they rely on simpler listen-before-talk methods and synchronized frame periods, which do not adapt well to varying channel occupancy conditions.
Innovation Solution
Implementing load-based equipment (LBE) access, specifically LBT category four, within FBE networks, where wireless transmit/receive units (WTRUs) determine the validity of LBE resources based on current channel occupancy, transmission priority, type, and requirements, allowing for dynamic resource allocation and fallback options, enabling random access and avoiding reconfiguration ambiguity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If frame-based equipment (FBE) networks use fixed channel occupancy times and synchronized frame periods, then network synchronization and structured resource allocation are improved, but resource utilization efficiency deteriorates due to unused resources and increased latency
Solution Approach 1:
The patent introduces dynamic resource allocation mechanisms that allow wireless transmit/receive units to determine the validity of load-based equipment resources based on current channel occupancy conditions. This enables the network to transition from static fixed frame periods to dynamic resource allocation, where resources can be adaptively adjusted based on real-time channel conditions, thereby improving resource utilization while maintaining network synchronization through coordinated dynamic adjustments.
Solution Approach 2:
The patent changes the parameter of channel occupancy from fixed to variable by introducing conditions under which load-based equipment resources become valid or invalid based on current channel occupancy status. This parameter change allows the system to optimize resource utilization by activating LBE resources when channel conditions permit and deactivating them when FBE resources are sufficient, thus resolving the contradiction between fixed structure and efficient resource use.
2Device complexity
If frame-based equipment (FBE) networks rely on simpler listen-before-talk methods, then device complexity is reduced, but channel access efficiency deteriorates due to inability to adapt to varying channel occupancy conditions
Solution Approach 1:
The patent implements a universal resource allocation framework where wireless transmit/receive units can operate with both frame-based equipment resources and load-based equipment resources. This multi-functionality allows the system to use simple listen-before-talk methods for FBE resources while also supporting more adaptive LBE resources when needed, combining the advantages of both approaches without requiring completely separate systems.
Solution Approach 2:
The patent enables wireless transmit/receive units to autonomously determine the validity of load-based equipment resources based on current channel occupancy conditions and their own transmission requirements. This self-service mechanism allows devices to dynamically select appropriate resources without complex centralized control, maintaining relatively simple device complexity while achieving improved channel access efficiency through adaptive resource selection.
3Device complexity
If fixed frame periods are used in FBE networks, then resource allocation structure is simplified, but latency increases due to unused resources during channel gaps
Solution Approach 1:
The patent configures load-based equipment resources in advance as potential fallback options, but their actual activation depends on real-time channel occupancy conditions. This preliminary configuration allows the system to have ready-to-use resources available without permanently allocating them, thus maintaining simple resource allocation structure while reducing latency by enabling quick switching to pre-configured LBE resources when channel gaps occur.
Solution Approach 2:
The patent implements a mechanism where load-based equipment resources can be temporarily discarded (deactivated) when frame-based resources are sufficient, and recovered (activated) when channel conditions warrant their use. This dynamic discarding and recovering of resources allows the system to maintain simple fixed frame structures during normal operation while recovering additional resources during channel gaps to reduce latency and improve overall resource utilization.
Data Source
AI summary
Systems, methods, and instrumentalities are described herein for enhanced channel access. Resources may be configured to enable load-based equipment (LBE) access in an otherwise frame-based equipment (FBE) network. LBE access may be, for example, LBT category four (Cat 4). A wireless transmit/receive unit (WTRU) may determine whether an LBE resource is valid based on current channel occupancy. A WTRU may use an LBE resource as a function of a transmission priority (e.g., priority of the content of the transmission, for example a first PUSCH transmission may be associated with a first priority and a second PUSCH transmission may be associated with a second priority), transmission type (e.g., whether the transmission is for PUSCH or PUCCH, for DG-PUSCH or CG-PUSCH, for data or CSI or HARQ-ACK, etc.), requirement(s), and/or grant. A WTRU may use an LBE resource, for example, as a fallback resource.