PUCCH Resource Selection for 5G Small Data Transmission
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Solution Overview
Problem
The increasing demand for wireless data traffic in mobile devices has outpaced the capabilities of existing 4G communication systems, necessitating the development of 5G/NR systems to support higher data rates and robust coverage, particularly in higher frequency bands, but existing technologies face challenges in efficiently managing small data transmissions.
Innovation Solution
The implementation of apparatuses and methods for small data transmission (SDT) in 5G/NR systems, including user equipment (UE) and base stations (BS) configured to utilize physical uplink control channels (PUCCH) for SDT, with processors determining criteria for initiating SDT procedures and selecting appropriate resources for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 5G/NR systems use massive antenna technologies and beamforming in higher frequency bands, then data rate and capacity are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent segments the small data transmission process into distinct phases: criteria evaluation (checking data size, channel conditions, UE state), resource selection (choosing appropriate PUCCH resources), and transmission execution. This segmentation simplifies the overall complex process by breaking it into manageable, standardized steps that can be independently optimized.
Solution Approach 2:
The patent utilizes parameter changes by dynamically selecting PUCCH resources based on evaluated criteria such as data size, channel quality indicators, and UE power state. The system adjusts transmission parameters (resource selection, power level) based on real-time conditions, enabling efficient adaptation without requiring complex reconfiguration of the entire system architecture.
2Adaptability or versatility
If existing 4G systems are used for mobile data transmission, then device compatibility is maintained, but data traffic capacity and speed are insufficient
Solution Approach 1:
The patent implements a universal small data transmission mechanism that operates across multiple 5G/NR configurations and frequency bands. The standardized PUCCH-based SDT procedure can be applied regardless of specific deployment scenario (TDD/FDD, different frequency ranges), making the solution universally applicable while enabling 5G-capable devices to achieve higher data rates than 4G systems.
3Productivity
If PUCCH resources are configured for small data transmission, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring PUCCH resources and establishing criteria for SDT initiation before actual data transmission occurs. The UE evaluates criteria (data size thresholds, channel conditions, power state) in advance and selects appropriate resources beforehand, which simplifies the real-time transmission process and reduces complexity during actual data delivery.
Data Source
AI summary
A user equipment (UE) includes a transceiver. The transceiver is configured to receive, from a base station (BS), a physical uplink control channel (PUCCH) configuration for small data transmission (SDT), the PUCCH configuration for SDT configuring one or more PUCCH resources. The UE also includes a processor operably coupled to the transceiver. The processor is configured to determine whether each of at least one criterion to initiate an SDT procedure is met. The processor is also configured to, in response to a determination that each of the at least one criterion to initiate the SDT procedure is met, select a PUCCH resource from the one or more PUCCH resources, and cause the transceiver to transmit, to the BS, an SDT initiation indication in the selected PUCCH resource.