PUSCH Channel Access Rules for Flexible NR Uplink Scheduling
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Solution Overview
Problem
Existing wireless communication systems lack flexibility and efficiency, particularly in handling various communication scenarios such as enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC), which are not adequately addressed by current technologies.
Innovation Solution
The implementation of Orthogonal Frequency Division Multiplex (OFDM) with Cyclic Prefix (CP-OFDM) and Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) in both downlink and uplink transmissions, along with resource grid configurations and carrier aggregation, enhances communication flexibility and efficiency by optimizing signal transmission and reception processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional communication structure is used, then system simplicity is maintained, but communication flexibility and efficiency are limited
Solution Approach 1:
The patent implements dynamic communication structures where the network can flexibly configure resource grids, subcarrier spacings, and cyclic prefix lengths based on real-time channel conditions and traffic requirements. This allows the system to adapt between different communication scenarios (eMBB, mMTC, URLLC) without requiring separate dedicated structures for each scenario, thus improving flexibility while managing complexity through unified dynamic configuration mechanisms.
Solution Approach 2:
The patent employs a universal resource grid structure that can serve multiple communication scenarios simultaneously. The same physical layer framework supports both broadband data transmission and low-latency communications by dynamically adjusting parameters such as subcarrier spacing and resource block allocation, rather than requiring separate specialized structures for different application types.
2Productivity
If communication parameters are optimized for specific scenarios, then efficiency for those scenarios improves, but adaptability to other scenarios deteriorates
Solution Approach 1:
The patent utilizes parameter changes as a core mechanism to achieve scenario-specific optimization within a unified framework. By dynamically adjusting key parameters including subcarrier spacing (Δf), cyclic prefix length (NCP), resource block size, and modulation schemes based on channel conditions and traffic requirements, the system can optimize performance for eMBB, mMTC, or URLLC scenarios as needed while maintaining the same underlying communication structure.
Solution Approach 2:
The communication system implements dynamic parameter configuration where transmission parameters are continuously adapted based on real-time channel state information, quality of service requirements, and traffic patterns. This allows the system to achieve high efficiency for current communication scenarios while retaining the capability to quickly transition to optimize for different scenarios when conditions change.
3Productivity
If resource allocation is simplified, then system operation ease improves, but communication efficiency deteriorates
Solution Approach 1:
The patent segments the resource grid into independently configurable units including resource blocks, resource element groups, and physical resource blocks that can be flexibly allocated to different users and services. This segmentation enables fine-grained resource control where small resource units can be efficiently assigned to meet diverse quality of service requirements, improving resource utilization efficiency while maintaining manageable allocation complexity through standardized unit structures.
Solution Approach 2:
The patent introduces multi-dimensional resource allocation mechanisms that operate across frequency, time, and spatial dimensions simultaneously. By organizing resources in a structured grid framework with configurable dimensions, the system can efficiently allocate resources in a unified manner while maintaining operational simplicity through standardized allocation procedures that work across all dimensions.
Data Source
AI summary
Terminal device attempts to transmit a PUSCH scheduled by a DCI format after the channel is sensed to be idle. When the start of the PUSCH is not aligned with an FFP-u, in a case that the channel access mode is configured to as semi-static, the terminal device does not initiate a COT, regardless of indication by a ChannelAccess-CPext field in the DCI format.