Selective Receptivity Signaling for Subband TDD Uplink Coverage
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing uplink coverage due to limitations in time division duplex (TDD) operation, where uplink coverage is constrained by the TDD pattern, leading to issues like inter-operator interference and inefficient resource allocation, particularly in dynamic TDD environments.
Innovation Solution
Implementing wireless terminals and access nodes with processor circuitry to determine and manage subband-wise availability for downlink channels, using alternate resource allocation techniques to avoid mapping virtual resource blocks to unavailable physical resource blocks, thereby enhancing uplink coverage and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If dynamic TDD operation is implemented to enhance uplink coverage by increasing uplink resources, then uplink coverage is improved, but inter-operator interference increases due to flexible TDD pattern changes
Solution Approach 1:
The patent divides the frequency spectrum into multiple subbands and enables independent TDD pattern configuration for each subband. This segmentation allows the system to optimize uplink resources in specific subbands without affecting other subbands, thereby enhancing uplink coverage while minimizing inter-operator interference through selective subband management.
Solution Approach 2:
The patent implements subband-specific TDD patterns where different uplink-downlink configurations can be applied to different frequency subbands. This local quality approach allows flexible resource allocation in specific frequency regions experiencing uplink coverage limitations, while maintaining stable patterns in other subbands to avoid generating inter-operator interference.
2Productivity
If subband-wise resource allocation is implemented to optimize resource usage, then resource allocation efficiency is improved, but system complexity increases due to additional management requirements
Solution Approach 1:
The patent introduces subband dimension to the resource allocation framework, enabling independent control of TDD patterns across different frequency subbands. This dimensional expansion allows the system to achieve fine-grained resource optimization without proportionally increasing complexity, as the subband structure provides a natural organizational hierarchy for resource management.
Solution Approach 2:
The patent implements dynamic TDD pattern adjustment at the subband level, allowing the system to adaptively optimize resource allocation based on varying traffic conditions. The processor determines subband availability and configures appropriate TDD patterns dynamically, achieving high resource allocation efficiency while managing complexity through structured decision-making processes.
Data Source
AI summary
A wireless terminal comprises receiver circuitry, processor circuitry, and transmitter circuitry. The receiver circuitry is configured to receive radio transmissions in one or more subbands in a serving cell. The processor circuitry is configured to generate wireless terminal selective receptivity information. The wireless terminal selective receptivity information indicates whether the wireless terminal has a capability to configure the receiver circuitry for controlling in which of the subbands the receiver circuitry receives transmissions. The transmitter circuitry is configured to transmit the wireless terminal selective receptivity information to the serving cell.