TDD Frame Structure for Dynamic Control Signaling Scheduling
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Solution Overview
Problem
Current wireless communication systems, such as LTE and 5G NR, face limitations in flexibility and efficiency when allocating physical resources for non-data information transmissions, particularly in TDD frame structures, which restricts scheduling flexibility and complicates resource allocation across multiple user equipment (UEs).
Innovation Solution
The proposed solution involves dynamically assigning physical resources for non-data information within subframes based on a TDD frame structure, allowing any subframe to be used for either downlink (DL) or uplink (UL) transmissions, rather than being restricted to guaranteed DL or UL subframes, enabling more flexible scheduling and resource distribution across a wider range of subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guaranteed DL and UL subframes are used for non-data transmissions, then reliability of control signaling is improved, but scheduling flexibility deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from static guaranteed subframe allocations to dynamic resource assignment. The base station can dynamically assign physical resources for control signaling (PDCCH, PUCCH, PRACH) to any available subframe based on current traffic conditions and UE requirements, rather than being constrained to fixed guaranteed subframes. This dynamic allocation maintains reliability through proper resource assignment while significantly improving scheduling flexibility.
2Ease of operation
If fixed subframe positions are allocated for physical resources, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by allowing the time-domain position parameter of physical resources to be variable rather than fixed. The base station can change the subframe position parameter dynamically based on frame structure type (F1-F6) and traffic conditions. This enables flexible resource allocation across different subframes while maintaining operational simplicity through standardized parameter modification rules rather than complex reconfiguration procedures.
3Reliability
If minimum guaranteed DL and UL subframes are provided, then reliability of non-data transmissions is improved, but productivity deteriorates
Solution Approach 1:
The patent applies universality by enabling any subframe to serve multiple functions depending on the frame structure type. The same subframe can be configured for different purposes (data transmission, control signaling, synchronization) based on the selected frame structure (F1-F6). This multi-functionality eliminates the need for separate guaranteed subframes for different purposes, improving resource allocation efficiency while maintaining reliability through proper configuration.
4Adaptability or versatility
If flexible frame structure configuration is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the frame structure configuration into discrete, manageable types (F1-F6), each with specific characteristics for DL/UL allocation, control signaling placement, and synchronization timing. This segmentation allows the system to provide flexible frame structure configuration while managing complexity through standardized configuration options rather than requiring complex custom configurations for each scenario.
Data Source
AI summary
A method, an apparatus, and a computer program for wireless communication that allows for greater scheduling flexibility of physical resources are disclosed. A UE determines a time division duplex (TDD) frame structure for a plurality of frames, where the plurality of frames include a plurality of uplink (UL) subframes and a plurality of downlink (DL) subframes. The UE determines whether a control signaling instance is scheduled during an UL subframe of the plurality of UL subframes, wherein the control signaling instance is scheduled periodically and the control signaling includes at least one of a random access channel, an uplink control channel, a sounding reference signal (SRS), or a scheduling request (SR). The UE communicates the control signaling instance if the control signaling instance is scheduled during an UL subframe.