TDD Slot Duplex Signaling for Mixed Uplink-Downlink Symbols
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Solution Overview
Problem
In wireless communication systems, the indication of full duplex (FD) operation time resources is necessary on a slot-by-slot basis to avoid undesirable transitions between FD and non-FD symbols within a slot, particularly when symbols with different link directions are present, to enhance communication efficiency and avoid interference.
Innovation Solution
A method and device for operating user equipment (UE) and base stations that provide time division duplex (TDD) configuration information, specifying FD or half duplex (HD) types for symbols with different link directions within a slot, allowing independent instruction of FD and non-FD types based on link direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If FD operation time resources are indicated on a per-symbol basis within a slot, then the flexibility to support symbols with different link directions is improved, but the device complexity and operation complexity increase
Solution Approach 1:
The patent segments the slot into multiple symbols and provides independent FD/HD indication for each symbol through separate indication fields. This allows each symbol to be independently configured with its own link direction and duplex type, enabling fine-grained control while maintaining clear separation of control information for each symbol segment
Solution Approach 2:
The patent introduces a new dimension of control by adding symbol-level indication fields alongside the existing slot-level TDD configuration. This multi-dimensional indication approach (slot level + symbol level) provides both overview control and detailed per-symbol control without conflicting with each other
2Device complexity
If FD operation time resources are indicated on a slot-by-slot basis, then the device complexity and operation complexity are reduced, but the ability to support symbols with different link directions within a slot deteriorates
Solution Approach 1:
The patent segments the control indication into two levels: slot-level TDD configuration providing the basic framework, and symbol-level indication fields providing detailed per-symbol control. This segmentation allows simple slot-level operation when uniform configuration is sufficient, while enabling complex per-symbol control when needed
Solution Approach 2:
The patent enables dynamic switching between coarse-grained slot-level control and fine-grained symbol-level control based on the actual communication needs. The network can configure symbols with different link directions dynamically within a slot while maintaining overall slot structure, adapting the control granularity to the specific traffic and interference conditions
3Adaptability or versatility
If transitions between FD and non-FD symbols occur within a slot, then the adaptability to different communication scenarios is improved, but interference and communication efficiency deteriorate
Solution Approach 1:
The patent applies preliminary anti-action by providing advance indication of FD/HD configuration for each symbol through pre-configured indication fields. The UE receives and processes these indications before the actual transmission occurs, allowing it to prepare appropriate reception or transmission modes in advance and avoid sudden transitions that would cause interference
Solution Approach 2:
The network performs preliminary action by configuring the TDD pattern and FD/HD indication for each symbol in advance before the slot transmission begins. This allows the UE to know the duplex type for each symbol beforehand, enabling smooth transitions and proper resource allocation without encountering unexpected FD/non-FD changes during transmission
Data Source
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AI summary
Provided are a device operation method and a device in a wireless communication system. The device receives time division duplex (TDD) configuration information for a link direction and receives type configuration information informing a full duplex (FD) type or a half duplex (HD) type. In this case, the FD type is a duplex type capable of simultaneously performing uplink operation and downlink operation using different frequency bands within a slot, and the HD type is a duplex type capable of performing either uplink operation or downlink operation within a slot. For a specific slot comprising symbols having different link directions, the type configuration information independently informs the FD type or the HD type for the symbols having different link directions.