Full-Duplex Resource Configuration for Cross-Link Interference Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing cross-link interference and optimizing resource allocation for full-duplex operations, particularly in scenarios involving half-duplex and full-duplex UEs, leading to inefficiencies in resource utilization and increased interference.
Innovation Solution
A resource configuration mechanism where a bit map or defined rule is used to dynamically switch bandwidth for symbol-level or slot-level operations, allowing UEs to determine whether to transmit or receive on specific sub-bands based on indicated patterns, thereby mitigating interference and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bandwidth switching is implemented for full-duplex operations, then resource efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic bandwidth switching where the UE can switch between different bandwidth configurations (first bandwidth for half-duplex, second bandwidth for full-duplex) based on operational mode. This dynamic adaptation allows the system to optimize resource efficiency for each mode while managing complexity through structured switching mechanisms controlled by signaling from the base station.
Solution Approach 2:
The patent changes the bandwidth parameter dynamically based on duplexing mode. The UE is configured with multiple bandwidth parts (BWPs) and switches between them according to whether it operates in half-duplex or full-duplex mode. This parameter change approach enables resource efficiency optimization without requiring complete system redesign, managing complexity through standardized parameter management.
2Object-affected harmful factors
If symbol-level or slot-level bandwidth switching is implemented, then interference mitigation is improved, but signaling overhead increases
Solution Approach 1:
The patent uses preliminary action by pre-configuring multiple bandwidth parts (BWPs) and switching patterns before actual full-duplex operation. The base station provides ahead-of-time configuration information including bit maps that indicate which BWPs to use in different slots or symbols. This preliminary configuration reduces the need for frequent real-time signaling during operation, thereby mitigating interference while controlling signaling overhead.
Solution Approach 2:
The patent implements periodic bandwidth switching using predefined patterns such as slot-level or symbol-level bit maps. These periodic switching patterns allow the UE to anticipate bandwidth changes and prepare accordingly, reducing interference through synchronized switching while minimizing signaling overhead by using predetermined rather than dynamically negotiated patterns.
3Productivity
If dynamic bandwidth switching is implemented, then system capacity is improved, but ease of operation deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of base station-controlled signaling that mediates between the need for dynamic bandwidth switching (for capacity) and user equipment simplicity (for ease of operation). The base station acts as the intermediary that manages the complexity of bandwidth switching by providing clear configuration instructions and bit map patterns, allowing the UE to operate automatically without requiring complex local decision-making logic.
Data Source
AI summary
A user equipment (UE) may use a resource configuration to determine whether to transmit or receive on a particular sub-band during a given communication period (e.g., a time slot or a symbol duration). In some examples, a network entity provides a bit map to a UE where the bit map indicates how sub-bands for a given communication period are allocated for full-duplex transmissions. The UE may then determine, based on the bit map, whether to transmit or receive on a particular sub-band. In some examples, a network entity provides a resource configuration to a UE where the resource configuration indicates how half-duplex transmissions and full-duplex transmissions are configured over a period of time. In this case, the UE may be configured by a defined rule to determine, based on the resource configuration, whether to transmit or receive on a particular sub-band.