Wireless Frame Structure for Full Duplex LTE and NR
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Solution Overview
Problem
Existing LTE and NR frame structures are not designed to accommodate full duplex (FD) communication, limiting their compatibility with FD-capable devices while still supporting FDD and TDD communication.
Innovation Solution
Define two separate and independent frame structures for reception and transmission, allowing for flexible configuration of communication directions to accommodate FD, FDD, and TDD communications, including asymmetric uplink and downlink scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing LTE and NR frame structures are used, then compatibility with legacy FDD and TDD devices is maintained, but the ability to support full duplex communication devices is limited
Solution Approach 1:
The patent divides the frame structure into separate transmission frame structure and reception frame structure, each independently configurable. This segmentation allows FD communication devices to utilize both frames simultaneously while legacy devices can use only one frame type, resolving the contradiction between supporting new FD functionality and maintaining compatibility with existing FDD/TDD devices without increasing overall system complexity
Solution Approach 2:
The patent designs a universal frame structure framework that can accommodate multiple communication modes (FDD, TDD, and FD) through configurable parameters. The transmission and reception frame structures can be independently configured to support different duplexing modes, making the system universally applicable to both legacy and new devices while enabling full duplex communication capability
2Adaptability or versatility
If separate frame structures for transmission and reception are introduced, then flexibility in communication scenarios is increased, but device complexity increases
Solution Approach 1:
The patent introduces dynamic configurability where the transmission frame structure and reception frame structure can be independently adjusted based on communication requirements. Parameters such as subcarrier spacing, frame duration, and symbol/slot configuration can be dynamically modified for each frame type, providing flexibility for asymmetric communication patterns and decoupling scenarios while maintaining manageable complexity through standardized configuration mechanisms
Solution Approach 2:
The patent enables independent parameter configuration for transmission and reception frame structures, allowing different subcarrier spacings, frame durations, and symbol/slot arrangements. This parameter flexibility supports diverse communication scenarios including asymmetric traffic patterns and decoupled uplink-downlink configurations without requiring fundamentally different frame structures, thus achieving versatility with controlled complexity
Data Source
AI summary
Current frame structures in Long-Term Evolution (LTE) and New Radio (NR) are not designed to accommodate full duplex (FD) communication. Embodiments are disclosed in which frame structures are provided that support FD communication and frequency division duplex (FDD) communication and time division duplex (TDD) communication. In some embodiments, there is defined two separate and independent frame structures: a frame structure for reception (e.g. a downlink frame structure) and a frame structure for transmission (e.g. an uplink frame structure).