NB-IoT Uplink Transmission With PUR Skip Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink data transmission in narrowband Internet of Things (NB-IoT) systems, particularly in maintaining semi-persistent scheduling operations and effectively utilizing preconfigured UL resources while minimizing power consumption and resource utilization inefficiencies.
Innovation Solution
A method for transmitting uplink data using preconfigured UL resources (PUR) in RRC idle state, with skip mechanisms and release criteria based on consecutive data transmission absence, along with specific signal transmission for tracking and configuration management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistent scheduling operation is performed using preconfigured UL resources in RRC idle state, then resource utilization is improved, but device complexity and power consumption increase due to continuous monitoring and transmission requirements
Solution Approach 1:
The patent implements dynamic skip mechanisms where the UE can selectively skip uplink data transmissions based on data availability. The skip counter mechanism allows the UE to dynamically adjust transmission behavior - when data is available, normal transmission occurs; when no data is available for a threshold number of occasions, transmission is skipped. This dynamic adaptation resolves the contradiction by maintaining resource utilization when needed while reducing power consumption when data is absent.
Solution Approach 2:
The UE autonomously manages its own transmission behavior using the skip mechanism without requiring continuous network control. The UE self-determines when to transmit or skip based on local data availability assessment and the skip counter threshold, eliminating the need for continuous network monitoring and control signaling. This self-service approach reduces power consumption while maintaining effective resource utilization.
2Reliability
If preconfigured UL resources are continuously allocated for semi-persistent scheduling, then data transmission reliability is improved, but resource waste occurs when there is no data to transmit
Solution Approach 1:
The patent implements a skip mechanism that allows the UE to bypass (skip) uplink data transmissions when no data is available to send. The skip counter tracks the number of consecutive occasions where data was not transmitted, and when it reaches a threshold, the UE skips the transmission. This skipping mechanism eliminates resource waste from empty transmissions while maintaining reliability by ensuring transmissions occur when data is actually available.
3Use of energy by moving object
If transmission skipping is implemented to reduce power consumption, then energy efficiency is improved, but timing advance tracking and SPS configuration management become more difficult
Solution Approach 1:
The patent implements feedback mechanisms where the UE reports skip status to the network, and the network provides timing advance adjustments and SPS configuration updates. The network can detect when skips occur and provide appropriate feedback to maintain proper timing alignment and configuration management. This feedback loop resolves the contradiction by enabling energy-efficient skipping while maintaining proper tracking and management through coordinated network-UE interaction.
Data Source
AI summary
According to an embodiment of the present disclosure, a method for transmitting, by a user equipment (UE), uplink data in a wireless communication system supporting a narrowband Internet of things (NB-IoT) system includes: receiving information related to a preconfigured uplink (UL) resource (PUR) for transmitting the uplink data in an RRC connected state; and transmitting the uplink data by using the preconfigured uplink resource (PUR) in an RRC idle state. In the transmitting of the uplink data, when the preconfigured UL resource (PUR) is a dedicated resource and there is no data to be transmitted in the preconfigured UL resource (PUR), transmission of the uplink data is skipped.